JP4308318B2 - Vehicle detection method, vehicle detection device, and vehicle detection unit - Google Patents

Description

The present invention relates to a vehicle detection method for detecting the presence or absence of a vehicle in a parking space such as an entrance / exit of a multi-storey parking lot in a department store, a highway entrance / exit, a coin parking, and a vehicle detection device and a vehicle detection unit used to implement the method. Is.

  Conventionally, as a method for detecting the presence / absence of a parked vehicle in a parking space, there have been various methods such as a detection method using an optical sensor or a magnetic sensor, and a detection method using a loop coil. As an example, there is a parking space provided with a plurality of magnetic sensors as described in Patent Document 1.

JP 2006-164145 A.

Conventional vehicle detection methods and vehicle detection devices using magnetic sensors have the following problems.
(1) As described in Patent Document 1, since two or more magnetic sensors for detecting the vehicle width direction and the vertical direction are required, it is difficult to arrange and adjust the magnetic sensors.
(2) Since a plurality of magnetic sensors are required, costs such as material costs, construction costs, adjustment costs, and repair costs increase.
(3) The vehicle cannot be discriminated from the others, and it may be erroneously detected because it cannot be distinguished from an empty can placed by mischief or a metal piece flying by the wind.
(4) Magnetic sensors are susceptible to temperature changes in the installed environment.
(5) It is difficult to start detection quickly after power failure recovery.
The object of the present invention is to solve at least the problems listed above.

The vehicle detection method, the vehicle detection device, and the vehicle detection unit of the present invention are compact, can reliably detect even weak geomagnetism, and can indicate an orientation (magnetic north). It was developed with a focus on magnetic sensors .

In the vehicle detection method of the present invention, as described in claim 1, a magnetic sensor capable of detecting the magnetism of any two or more of the X axis, the Y axis, and the Z axis is installed in or near the vehicle detection area. A method for detecting a change in magnetism associated with the presence or absence of a vehicle with a magnetic sensor to detect the presence or absence of a vehicle in the vehicle detection area, and for detecting vehicle entry into the vehicle detection area, After performing any one or two or more discriminating steps of 4 to 8 and 9 discriminating steps to discriminate the fluctuation of the magnetic level due to the vehicle movement and the fluctuation of the magnetic level due to factors other than the vehicle movement, The presence or absence of a vehicle in a vehicle detection area is detected.
1. A step of determining that when the amount of fluctuation of the magnetic level detected in the vehicle detection area in the absence of the vehicle exceeds a reference value, the variation at this time is stored as “determination variation” and the process proceeds to the next step 2;
2. A step of determining whether or not the magnetic level after the “determination variation” in step 1 is kept stable for a predetermined time;
3. If it is determined in step 2 that the stable holding is performed, this magnetic level is stored as a “discrimination magnetic level”, and it is determined that the process proceeds to the next process. If it is determined that the magnetic level is not stable, the process returns to the detection state. The process of judging,
4). A step of comparing the initial setting value of the geomagnetic level when the vehicle is not present and the "determination magnetic level" stored in the step 3, and determining the presence of the vehicle and the possibility of the vehicle based on the difference;
5. Comparing the maximum value of the magnetic level detected after the “variation for determination” in step 1 with a reference value, and determining the presence of a vehicle and the presence of a vehicle based on this difference;
6). The time required from the “variation for determination” in step 1 to the determination that the magnetic level is stably maintained in step 3 is compared with the reference time, and this difference indicates the possibility of vehicle absence and vehicle presence. A process of determining whether there is,
7). The “discrimination magnetic level” stored in step 3 is compared with the “discrimination magnetic level” of all histories that have been previously determined to be non-existent. A process of determining the possibility of vehicle presence,
8). The magnetic level in the absence of the vehicle detected immediately before the “determination for determination” in the step 1 is compared with the “magnetic level for determination” stored in the step 3, and the difference between the absence of the vehicle and the presence of the vehicle is determined by this difference. A process of determining the possibility,
9. A step of determining that the vehicle has entered the vehicle detection area based on the result of the determination step of any one or more of 4 to 8.

According to the vehicle detection method of the present invention, as described in claim 2, a magnetic sensor capable of detecting the magnetism of any two or more of the X axis, the Y axis, and the Z axis is installed in or near the vehicle detection area. A method of detecting the presence or absence of a vehicle in a vehicle detection area by detecting a change in magnetism associated with the presence or absence of a vehicle with a magnetic sensor, and detecting the vehicle exit from the vehicle detection area with the following 1 to 3 determination steps: After performing any one or two or more discriminating steps of 4 to 8 and 9 discriminating steps to discriminate the fluctuation of the magnetic level due to the vehicle movement and the fluctuation of the magnetic level due to factors other than the vehicle movement, The presence or absence of a vehicle in a vehicle detection area is detected.
1. A step of storing the fluctuation at this time as a “determination fluctuation” and proceeding to the next step 2 when the fluctuation amount of the magnetic level detected in the vehicle detection area in the presence of the vehicle exceeds a reference value;
2. A step of determining whether or not the magnetic level after the “determination variation” in step 1 is kept stable for a predetermined time;
3. If it is determined in step 2 that the stable holding is performed, this magnetic level is stored as a “discrimination magnetic level”, and it is determined that the process proceeds to the next process. If it is determined that the magnetic level is not stable, the process returns to the detection state. The process of judging,
4). The initial setting value of the geomagnetic level when the vehicle is not present in the vehicle detection area is compared with the “determination magnetic level” stored in the step 3, and the vehicle absence and vehicle existence in the vehicle detection area can be determined based on this difference. Process for discriminating the presence of sexuality Embodiment 5 The magnetic level at the time of vehicle presence detected immediately before the “determination fluctuation” in the step 1 is compared with the “magnetic level for determination” stored in the step 3, and the vehicle can be absent and the vehicle can be present by this difference. Process for determining the existence of a characteristic Embodiment 6 Regarding the “discriminating magnetic level” that has been determined to be stable after the “decision variation” that has occurred since the vehicle entry was detected, the difference between the previous and next “discrimination magnetic levels” was defined as the “amount of on-vehicle variation”. Compares the latest "Variation when vehicle is present" with the "Initial variation when entering", which is the variation of the magnetic level caused by "Variation for judgment" when vehicle entry is detected. A process of determining the absence of vehicles in the area and the possibility of vehicle presence,
7). The “initial change amount at the time of entry” described in the step 6 is compared with the change amount obtained by summing up the “change amounts at the time of vehicle presence” described in the step 6, and the vehicle absence and the vehicle presence in the vehicle detection area are compared by the difference. The process of determining the possibility of
8). The difference between the magnetic level in the absence of the vehicle immediately before the “determination change” when the vehicle approach is detected and the “determination magnetic level” stored in the step 3, and each “in-vehicle change” described in the step 6 A step of comparing any one or a combination of two or more of the “quantity”, and determining the presence of a vehicle in the vehicle detection area and the possibility of vehicle presence based on the difference,
9. A step of determining vehicle exit from the vehicle detection area based on the result of the determination step of any one or more of 4 to 8.

In the vehicle detection method of the present invention, as described in claim 3, a magnetic sensor capable of detecting the magnetism of any two or more of the X axis, the Y axis, and the Z axis is installed in or near the vehicle detection area, This is a method of detecting the presence or absence of a vehicle in the vehicle detection area by detecting a change in magnetism associated with the presence or absence of a vehicle with a magnetic sensor. 1 to 3 discriminating steps, 4 or 5 discriminating steps, and 6 discriminating steps are performed , and magnetic level fluctuations due to vehicle movement and magnetic level fluctuations due to factors other than vehicle movement And the presence / absence of a vehicle in the vehicle detection area is detected.
1. Storing the magnetic level immediately before the power failure and the presence or absence of the vehicle;
2. A step of determining whether or not the magnetic level after the return of energization keeps stable for a predetermined time when energization is restored;
3. If it is determined in the step 2 that the stable holding is performed, this magnetic level is stored as a “determination magnetic level”, and it is determined that the process proceeds to the next process. If it is determined that the magnetic level is not stable, the detection state is returned. The process of judging,
4). The initial setting value of the geomagnetic level when the vehicle is not present in the vehicle detection area is compared with the “determination magnetic level” stored in the step 3, and the vehicle absence and vehicle existence in the vehicle detection area can be determined based on this difference. A process of determining whether there is sex,
5. The magnetic level immediately before the power failure is compared with the “discriminating magnetic level” stored in Step 3, and it is determined from this difference that the vehicle in the vehicle detection area before power failure stored in Step 1 is present or absent. Process,
6). A step of discriminating the presence or absence of a vehicle in the vehicle detection area based on the result of the discrimination step of either one or both of 4 and 5.

The vehicle detection method of the present invention, a magnetic sensor or, automatically detects the installation environment temperature, if the detected temperature is outside the range of stable operation allowable temperature of the magnetic sensor is a magnetic sensor or the installation environment temperature It is also possible to detect the presence or absence of the vehicle while maintaining the stable operation of the magnetic sensor by automatically adjusting the temperature so that the temperature becomes the allowable temperature.

Furthermore, the vehicle detection method of this invention can also install the magnetic sensor in two or more places, and can also detect the presence or absence of the vehicle in a vehicle detection area based on the magnetic level detected with these magnetic sensors . The magnetic sensor used in the vehicle detection method of the present invention can be an electronic compass.

The vehicle detection device of the present invention has a magnetic sensor capable of detecting the magnetism of any two or more of the X-axis, Y-axis, and Z-axis at or near the vehicle detection area, and a magnetic change detected by the magnetic sensor. An apparatus for detecting the presence / absence of a vehicle in a vehicle detection area having a determination processing unit for determining the presence / absence of a vehicle based on the following 1 to 3 in detecting a vehicle entering the vehicle detection area. And the discriminating function of any one or more of 4 to 8, and the function of 9, and discriminating the fluctuation of the magnetic level due to the movement of the vehicle and the fluctuation of the magnetic level due to factors other than the movement of the vehicle Thus, the presence or absence of a vehicle in the vehicle detection area is detected.
1. When the amount of variation in the magnetic level detected by the vehicle detection area when the vehicle absence exceeds the reference value, the variation of this time is stored as a "determination for change" function of determining to proceed to the next function 2,
2. Functional magnetic level after "determination fluctuation" of the function 1 determines whether to maintain a stable and continued for a predetermined time,
3. When the function 2 is determined to be stable, the magnetic level is stored as a “discriminating magnetic level” and it is determined to proceed to the next function . When it is determined to be unstable, the detection state is returned to. The ability to judge,
4). The initial setting value of the geomagnetic level in the absence of the vehicle is compared with the “determination magnetic level” stored in the function 3, and the difference between the vehicle detection area and the presence of the vehicle is determined based on the difference. The ability to
5. Ability to discrimination of there is a possibility of vehicle absence and the vehicle presence as compared to the maximum value and the reference value of the magnetic levels detected after "determination fluctuation" vehicle detection area by this hidden of the function 1,
6). The time required from the “variation for determination” of the function 1 to the time when it is determined that the magnetic level is stably held by the function 3 is compared with the reference time. ability to discrimination of there is a possibility of presence,
7). The “discrimination magnetic level” stored in the function 3 is compared with the “discrimination magnetic level” of all histories that were previously determined to be non-existent and stored in the vehicle detection area. The ability to distinguish between the absence of a vehicle and the possibility of vehicle presence,
8). The magnetic level in the absence of the vehicle detected immediately before the “variation for determination” in the function 1 is compared with the “magnetic level for determination” stored in the function 3, and the difference between the absence of the vehicle and the presence of the vehicle is determined by this difference. A function to determine the possibility,
9. A function of determining that the vehicle has entered the vehicle detection area based on the result of the determination function of any one or two or more of 4 to 8.

The vehicle detection device of the present invention has a magnetic sensor capable of detecting the magnetism of any two or more of the X-axis, Y-axis, and Z-axis at or near the vehicle detection area, and a magnetic change detected by the magnetic sensor. An apparatus for detecting the presence / absence of a vehicle in a vehicle detection area having a determination processing unit for determining the presence / absence of a vehicle based on the following 1 to 3 in detecting a vehicle exit from the vehicle detection area. And the discriminating function of any one or more of 4 to 8, and the function of 9, and discriminating the fluctuation of the magnetic level due to the movement of the vehicle and the fluctuation of the magnetic level due to factors other than the movement of the vehicle In the vehicle detection area, the presence or absence of a vehicle is detected. When the amount of variation in the magnetic level detected by the vehicle detection area of the vehicle there is more than the reference value, the variation of this time is stored as a "determination for change" function of determining to proceed to the next function 2,
2. Functional magnetic level after "determination fluctuation" of the function 1 determines whether to maintain a stable and continued for a predetermined time,
3. When the function 2 is determined to be stable, the magnetic level is stored as a “discriminating magnetic level” and it is determined to proceed to the next function . When it is determined to be unstable, the detection state is returned to. The ability to judge,
4). The initial setting value of the geomagnetic level in the absence of the vehicle is compared with the “determination magnetic level” stored in the function 3, and the difference between the vehicle detection area and the presence of the vehicle is determined based on the difference. Function to
5. The magnetic level at the time of vehicle presence detected immediately before the “variation for determination” of the function 1 is compared with the “magnetic level for determination” stored in the function 3, and this difference indicates that the vehicle is not present in the vehicle detection area. A function to determine the possibility of vehicle presence,
6). Regarding the “discriminating magnetic level” that has been determined to be stable after the “decision variation” that has occurred since the vehicle entry was detected, the difference between the previous and next “discrimination magnetic levels” was defined as the “amount of on-vehicle variation”. Compares the latest "Variation when vehicle is present" with the "Initial variation when entering", which is the variation of the magnetic level caused by "Variation for judgment" when vehicle entry is detected. A function to determine the absence of vehicles in the area and the possibility of vehicle presence,
7). The “initial change amount at the time of entry” described in the function 6 is compared with the change amounts obtained by summing up the “change amounts at the time of vehicle presence” described in the function 6, and the vehicle absence and vehicle presence in the vehicle detection area are compared by the difference. ability to the possibly of discrimination,
8). The difference between the magnetic level in the absence of the vehicle immediately before the “determination variation” when the vehicle approach is detected and the “determination magnetic level” stored in the function 3, and each “in-vehicle variation” described in the function 6 comparing the combination any one or more of the amount "respectively, function to the likelihood there is determined in the vehicle absence and the vehicle presence of the vehicle detection area by its hidden,
9. A function of determining that the vehicle has left the vehicle detection area based on a result of the discrimination function of any one of 4 to 8 or more.

The vehicle detection device of the present invention is
A magnetic sensor capable of detecting the magnetism of any two or more of the X-axis, Y-axis, and Z-axis at or near the vehicle detection area, and the presence or absence of the vehicle is determined based on the magnetic change detected by the magnetic sensor. A device for detecting the presence or absence of a vehicle in a vehicle detection area that includes a determination processing unit and a power failure detector that detects occurrence of power failure or power return, wherein the determination processing unit is in the vehicle detection area at the time of power return. per the discrimination detection of presence or absence of a vehicle, the function of the next 1 to 3, either one or both of the discrimination function of 4 or 5, a function of 6, except the variation in the magnetic level and vehicle movement due to the vehicle movement The presence or absence of the vehicle in the vehicle detection area is detected after discriminating from the fluctuation of the magnetic level due to the above factor.
1. A function to store the magnetic level immediately before the power failure and the presence or absence of the vehicle,
2. A function to determine whether or not the magnetic level after the return of energization remains stable for a predetermined time when energization is restored;
3. When the function 2 is determined to be stable, the magnetic level is stored as a “discriminating magnetic level” and it is determined to proceed to the next function . When it is determined to be unstable, the detection state is returned to. The ability to judge,
4). The initial setting value of the geomagnetic level in the absence of the vehicle is compared with the “determination magnetic level” stored in the function 3, and the difference between the vehicle detection area and the presence of the vehicle is determined based on the difference. Function to
5. The magnetic level immediately before the power failure is compared with the “discriminating magnetic level” stored in the function 3, and based on this difference, it is determined that the vehicle in the vehicle detection area before the power failure stored in the function 1 is present or absent. Function ,
6). A function of discriminating the presence or absence of a vehicle in the vehicle detection area based on the result of the discrimination function of either one or both of 4 and 5.

Vehicle detection device of the present invention, the installation of the magnetic sensor when the comprises a temperature sensor for automatically detecting a magnetic sensor or the installation environment temperature, temperature detected by the temperature sensor is outside the range of stable operation allowable temperature of the magnetic sensor A magnetic sensor or a temperature adjusting device capable of adjusting the installation environment temperature thereof may be provided so that the environmental temperature becomes the allowable temperature.

Vehicle detection device of the present invention, two or more positions of the magnetic sensors installed in the vehicle detection area aggregates magnetic variation caused by vehicle presence has been detected, and those with determination processing unit can be discriminated processed collectively can do. Moreover, determination processing unit for determining processing individually magnetic variation with sensed vehicle presence at two or more magnetic sensors installed in the vehicle detection area is provided for each magnetic sensor, treated with their judgment processing section A relay device that aggregates the determination results may be provided, and the relay device may transmit the aggregated data to a terminal device that is controlled according to the determination results. The magnetic sensor provided in the vehicle detection device of the present invention may be an electronic compass.

The vehicle detection unit of the present invention controls the vehicle detection device according to any one of claims 7 to 14 and the vehicle detection when the vehicle is detected in the vehicle detection area, and cancels the control when the adjustment is completed. The vehicle detection device is built in or externally attached to the vehicle stop device .

The vehicle detection method of the present invention has the following effects.
(1) Since a magnetic sensor such as an electronic compass detects fluctuations in the magnetic level associated with the entry, retreat, and movement of a vehicle, even weak magnetic fluctuations can be reliably detected.
(2) Since not only parking of vehicles in the parking space but also passage of vehicles in the vehicle passage can be detected, in addition to detecting parked vehicles in parking lots such as coin parking, The present invention can be applied to detection of the presence / absence of a vehicle in various places, such as detecting a passing vehicle at an entrance / exit.
(3) Since the presence or absence of the vehicle is determined from the difference between the detected actual magnetic level and the reference geomagnetic level, the detection accuracy is high.
(4) Since the vehicle and other objects are discriminated, the vehicle is discriminated from the entry and exit of the vehicle, even when the vehicle is simply passed near the parking space or when a person comes and goes. Can only be detected accurately.
(5) Comparison of detected actual magnetic level and calibration value, maximum value and reference value of detected actual magnetic level, time and reference value until stable holding from fluctuation of magnetic level, and various fluctuation amounts The change in the magnetic level due to the vehicle and the magnetic level due to factors other than the vehicle are discriminated based on the above, etc., so that the vehicle presence / absence can be determined with higher accuracy.
(6) Since the environmental temperature of the electronic compass can be automatically measured and automatically adjusted to a temperature at which a magnetic sensor such as an electronic compass operates stably, stable vehicle discrimination can be performed regardless of the environmental temperature.
(7) Even if a power outage occurs, it automatically detects when the power outage is restored, and even after recovery, the presence or absence of a vehicle in the vehicle detection area is detected in the same way as before the power outage. Return to operation.

The vehicle detection unit of the present invention includes a magnetic sensor such as an electronic compass, or a determination processing unit for determining the presence / absence of a vehicle based on a magnetic change detected by the magnetic sensor . By simply installing the unit in the vehicle detection area, both a magnetic sensor such as an electronic compass and a vehicle stopper are laid at the same time, so that laying work (construction) is facilitated.

The vehicle detection device of the present invention has the following effects.
(1) Because a magnetic sensor such as an electronic compass that detects magnetic fluctuations is used to detect the presence of a vehicle in the vehicle detection area, the configuration is simple and a compact vehicle detection device is installed and installed in the vehicle detection area. Becomes easier.
(2) Since the electronic compass is small, it does not take up space for installation, and it is easy to install in various places such as parking lots such as coin parking, three-dimensional parking lots of department stores, the vicinity of those entrances and exits of expressways.
(3) Since the electronic compass is small, it can be built in or externally attached to a car stop device installed in a parking lot. In that case, the electronic compass can be installed at the same time as installing the car stop device.
(4) Since the temperature adjustment device is provided, the installation environment temperature of the magnetic sensor such as an electronic compass can be automatically adjusted to a temperature that directly or indirectly stably operates, and the detection accuracy of the electronic compass is stabilized.
(5) Since a power supply monitoring device is provided, the device monitors the voltage change and automatically detects the occurrence or recovery of a power outage. After returning, whether there is a vehicle in the vehicle detection area Can be detected, and prompt and stable operation can be secured after a power failure recovery.
(6) The vehicle is provided with various discriminating functions for comparing the magnetic level fluctuation with various reference values to discriminate whether the magnetic level fluctuation is due to the approach, reverse, movement, etc. of the vehicle or other causes. It is possible to reliably detect whether or not the presence of other objects is present.
(7) Since there is a terminal control device that automatically controls various terminal devices such as parking fee settlement machines and opening / closing devices for parking lot entrances based on magnetic level fluctuations detected by a magnetic sensor such as an electronic compass. It is possible to automatically control related devices around the vehicle detection area as well as the discrimination detection.
(8) is provided with the relay device determination processing magnetic level fluctuation in detected by the magnetic sensor, such as two or more positions of the electronic compass, also a magnetic sensor such as an electronic compass is being installed at two or more locations in the vehicle detection area, The presence or absence of the vehicle can be determined and detected by processing the magnetic level fluctuation detected by the magnetic sensor such as the electronic compass with a simple system.

Hereinafter, embodiments of the present invention will be described. In the embodiment described here, an electronic compass is used as a magnetic sensor (the magnetic strength is detected by a built-in magnetic sensor, the detected magnetic intensity is converted into an electric signal, and the orientation can be determined from the signal. However, an electronic compass is an example, and a magnetic sensor arranged on any two or more of the X-axis, Y-axis, and Z-axis can be the same embodiment. Needless to say.

(Embodiment 1)
An embodiment of a vehicle detection method and a vehicle detection device of the present invention will be described with reference to FIGS. This embodiment is a case where the vehicle detection area is a parking space 2 such as a coin parking with a car stop device 1, and is a method and device for detecting whether or not the vehicle 3 is parked in the parking space 2. This is an example of a method and an apparatus for controlling the car exit and passage of the vehicle when the car stop device 1 is activated upon confirming (for example, parking or passing).

  As shown in FIG. 1, the vehicle detection device 4 shown in FIG. 1 is provided in the approximate center of the parking space 2 in the direction of entry / exit, and is provided in the immediate vicinity of the car stop device 1, and the vehicle detection device 4 parks the vehicle 3. Is confirmed, the flap plate 5 of the car stop device 1 rotates upward to restrict the free delivery of the vehicle 3, and the flap plate 5 rotates downward to allow the vehicle 3 to exit when the customer finishes payment. It is configured to be The vehicle detection device 4 can be provided in the car stop device 1 or can be installed at an arbitrary location in the parking space 2 separately from the car stop device 1. When the vehicle detection device 4 is built in the vehicle stop device 1, the position of A to C shown in FIG. 4 is shown when the vehicle detection device 4 is attached or embedded in the periphery of the vehicle stop device 1 inside the vehicle stop device chassis indicated by the hatched portion in FIG. 3. If it becomes, construction for installation becomes easy. When there is no car stop device 1, it is fixed or buried in pavement or ground within the range shown by the oblique lines in FIG.

  As shown in the block diagram of FIG. 2, the vehicle detection device 4 that includes an electronic compass 7, a discrimination processing unit, and a power source 16 in the case 6 can be used. As the discrimination processing unit, one having two A / D conversion circuits 10 and 11, a microprocessor (CPU) 12, a memory 13, a thermistor 14, and an output circuit 15 can be used.

  As shown in FIG. 1, the case 6 can be fixed to the ground surface in the parking space 2 or a car stopper. The case 6 has a robust structure that does not break even when the vehicle 3 rides. It is also a waterproof case, and is dust-proofed and treated to prevent dust and rainwater from entering inside. Furthermore, the case 6 is made of a material and a structure that does not interfere with the detection of magnetism by the electronic compass 7.

  The electronic compass 7 in FIG. 2 is a general-purpose or newly developed electronic compass. The principle is that a built-in magnetic sensor (not shown) detects the strength of the magnetism, converts the detected magnetic strength into an electric signal, and can determine the direction from the signal. The electronic compass 7 in FIG. 2 can be either a 2-axis type or a 3-axis type. In the 2-axis type, two magnetic sensors are combined at right angles so that the magnetism in the front-rear direction and the left-right direction can be detected. In the 3-axis type, the third magnetic sensor is added to the two magnetic sensors of the 2-axis type. A sensor is added to detect the vertical magnetism. If a 2-axis type electronic compass is used, the magnetism in the width direction (X-axis) and the longitudinal direction (Y-axis) of the parking space 2 can be detected, and if a 3-axis type electronic compass is used, further The magnetism in the vertical direction (Z axis) of the parking space 2 can also be detected. Therefore, this electronic compass 7 generates magnetism when, for example, the vehicle 3 is not in the parking space 2, the vehicle 3 is parked in the parking space 2, or a person or vehicle passes near the parking space 2. It is possible to detect the presence of a vehicle in the parking space 2 by detecting a level change.

  FIG. 2 shows a case where only one two-axis type electronic compass 7 is installed, and the magnetic level (analog electric signal) detected by the electronic compass 7 is A / D conversion circuits 10 and 11 (FIG. 2). ). Each of the A / D conversion circuits 10 and 11 is a circuit that converts an analog signal sent from the electronic compass 7 into a digital signal and sends it to the microprocessor 12. One of the two A / D conversion circuits 10 and 11 is an X-axis A / D conversion circuit 10 for digitally converting a signal detected by the X-axis magnetic sensor, and the other is a signal detected by the Y-axis magnetic sensor. Is a Y-axis A / D conversion circuit 11 for digitally converting. When the electronic compass 7 is a three-axis type, a Z-axis A / D conversion circuit that digitally converts a signal detected by the Z-axis magnetic sensor is required.

  The microprocessor 12 in FIG. 2 compares the magnetic level detected by the electronic compass 7 based on the digital signals sent from the A / D conversion circuits 10 and 11 with that when the vehicle 3 is not in the parking space 2. It is a processing circuit that determines at any time whether or not the vehicle 3 is parked on the parking space 2 by determining how much it has changed.

  The microprocessor 12 determines whether or not the vehicle 3 is parked on the parking space 2 by determining a geomagnetic level (calibration: initial reference level: when the vehicle 3 does not exist on the parking space 2). 2) and the measured value of the magnetic level detected by the electronic compass at the time of the magnetic change, the change value (difference) is not less than a predetermined value, and the predetermined value is When the vehicle 3 is held stably for a certain time, it is determined that the vehicle 3 exists on the parking space 2. Therefore, even when there is a change in the measured magnetic level, the vehicle 3 is placed on the parking space 2 when a difference greater than a predetermined value is not measured or when the predetermined value does not continue for a certain period of time. Judged not to exist. Incidentally, if the magnetic level fluctuates but the predetermined value does not continue for a certain period of time, if a person or vehicle passes nearby, if the vehicle 3 temporarily passes over the parking space 2, the empty can can be mischievous. May be placed. In this embodiment, as described above, the fluctuation of the magnetic level due to the presence of the vehicle and the fluctuation of the magnetic level due to other factors can be discriminated, and only the fluctuation of the magnetic level due to the existence of the vehicle can be reliably discriminated. These determinations are based on the fact that the amount of change in the magnetic level when the vehicle 3 that is mainly made of metal is present on the parking space 2, that is, above the electronic compass 7, passes only near the parking space 2. This is done by utilizing the fact that it is much larger than the amount of change in the magnetic level in the absence.

  In the case of the present embodiment, when the microprocessor 12 determines that the vehicle 3 is parked on the parking space 2, the microprocessor 12 sends a signal to the output circuit 15 that the vehicle 3 is parked.

  The memory 13 shown in FIG. 2 is a device capable of storing various information. In this memory 13, the geomagnetic level measured by the electronic compass 7 when the vehicle 3 is not present on the parking space 2, the magnetic level when the vehicle 3 is present on the parking space 2, parking The magnetic level in various states inside and outside the parking space 2 such as the magnetic level when a person or the vehicle 3 passes near the space 2 is stored, and the standard when the microprocessor 12 determines the presence or absence of the vehicle 3 It can be done. Further, the memory 13 can store various information such as a usage history, usage time, usage fee, etc. of the parking space 2 as needed. Further, the information stored in the memory 13 can be set to the outside or the external writing can be set by the serial communication shown in FIG. 2 or other communication.

  The thermistor 14 in FIG. 2 measures the temperature of the electronic compass 7 or its installation environment (ambient), and inputs the data to the microprocessor 12 so that the measurement error of the electronic compass 7 due to temperature change can be corrected. . With this correction, the vehicle detection device 4 can reliably detect the vehicle without being affected by the external environment such as rain, wind, snow, and sunshine.

  The output circuit 15 shown in FIG. 2 receives a signal sent when the microprocessor 12 determines that the vehicle 3 is parked on the parking space 2, and operates the car stop device 1 to release the vehicle 3 freely. It is a circuit that outputs a signal for regulating.

  A power supply 16 shown in FIG. 2 is a power supply for operating the electronic compass 7, the A / D conversion circuits 10 and 11, the microprocessor 12, the memory 13, and the like mounted in the case 6. As the power source 16, any power source such as a battery or a commercial power source can be used.

  Based on the flowchart of FIG. 6, the vehicle detection device 4 of FIGS. 1 and 2 detects the presence or absence of the vehicle 3 on the parking space 2, and when the vehicle 3 is parked on the parking space 2, The operation procedure will be described.

  When the vehicle detection device 4 is installed and it is confirmed that there is no vehicle on the parking space 2 and then the vehicle detection device 4 is operated by turning on the power (S1), the electronic compass 7 is in a state where there is no vehicle ( The geomagnetic level on the parking space 2 when the vehicle is empty is detected, and the level is set as an initial state and stored in the memory 13 (S2). Even after the geomagnetism on the parking space 2 in the initial state is stored in the memory 13, the electronic compass 7 continuously detects the magnetism on the parking space 2 (S3). The magnetism detected by the electronic compass 7 is converted into an electrical signal (analog signal) and sent to the A / D conversion circuits 10 and 11 as needed, and converted into a digital signal by the A / D conversion circuits 10 and 11 and then the microprocessor 12. To be sent to. At this time, the setting of the initial state stored in the memory 13 can be finely adjusted in accordance with the change in magnetism when the electronic compass 7 detects an empty vehicle.

  The microprocessor 12 determines whether or not the magnetic level currently measured by the electronic compass 7 has changed compared to the geomagnetic level when the vehicle 3 is not present on the parking space 2 (S4). When there is no change in the measured magnetic level (S4: N), it is determined that the vehicle 3 does not exist on the parking space 2 (S5), and the process returns to the magnetic detection by the electronic compass 7 (S3). If there is a change (S4: Y), the change is compared with the geomagnetic level when the vehicle 3 does not exist, and it is determined whether the difference is equal to or greater than a predetermined value (S6). Here, when the difference (comparison value) is equal to or smaller than the predetermined value (S6: N), it is determined that the vehicle 3 does not exist on the parking space 2 (S5), and the magnetic compass 7 is used for magnetic detection. Return (S3). When the difference is equal to or greater than the predetermined value (S6: Y), it is determined that the vehicle 3 is present on the parking space 2 (S7).

  When it is determined that the vehicle 3 is present on the parking space 2 (S7), the microprocessor 12 determines whether or not the state in which the vehicle 3 is present on the parking space 2 has continued for a certain period of time ( S8). When the state in which the vehicle 3 exists on the parking space 2 does not continue for a certain time or longer (S8: N), it is not determined that the vehicle 3 is parked on the parking space 2 (S5), and the magnetic field generated by the electronic compass 7 is used. Return to detection (S3). When the state where the vehicle 3 exists on the parking space 2 continues for a certain time or longer (S8: Y), it is determined that the vehicle 3 is parked on the parking space 2 (S9), and the microprocessor 12 sends a signal to the output circuit 15 The output circuit 15 receives the signal and outputs a signal for operating the car stop device 1. The electronic compass 7 continues to detect the magnetic level on the parking space 2 thereafter (S3).

(Embodiment 2)
The vehicle detection method and the vehicle detection device of the present invention are not limited to the vehicle detection in the parking space described in the first embodiment, and the vehicle is a vehicle in various vehicle passages such as the entrance / exit of a multilevel parking lot in a department store or the entrance / exit of an expressway. It can also be used to detect whether or not the passage has been passed. In this case, for example, as shown in FIG. 7, the gate 21 can be opened when the passage of the vehicle 3 is confirmed.

  The vehicle detection device 4 according to the present embodiment detects whether or not the vehicle has passed through the vehicle passage 20 in various vehicle passages 20 such as the entrance / exit of a multilevel parking lot in a department store or the entrance / exit of an expressway as shown in FIG. It is a possible device. As shown in the figure, the vehicle detection device 4 is provided at the center of a vehicle passage 20 including a gate 21, and is configured such that the gate 21 is opened when the vehicle detection device 4 confirms the passage of the vehicle. ing. What is provided in the vehicle passage 20 is not limited to the gate 21, and may be any as long as it operates by confirming the passage of the vehicle, such as an automatic ticket issuing machine. The vehicle detection device 4 of this example is substantially the same as that described in the first embodiment (see FIG. 2), and detects a magnetic change in the vehicle passage 20 with an electronic compass, and the magnetic level at the time of the change. Is compared with a reference geomagnetic level when the vehicle 3 does not pass through the vehicle passage 20, and when a change (difference) of a predetermined value or more is measured, it is determined that the vehicle 3 has passed through the vehicle passage 20. It is what you do. In this embodiment, some functions of the microprocessor 12 and the output circuit 15 are different from those described in the first embodiment.

  When it is determined that the vehicle 3 has passed through the vehicle passage 20 (passed over the vehicle detection device 4), the microprocessor 12 of this embodiment immediately sends a signal to the output circuit 15 that the vehicle 3 has passed. It is like that. The output circuit 15 outputs a signal for opening the gate 21 immediately after receiving the signal.

(Embodiment 3)
Another embodiment of the vehicle detection method and the vehicle detection device of the present invention will be described with reference to FIGS. This embodiment is a method and apparatus for detecting the presence / absence of parking in a parking space such as a coin parking using an electronic compass, automatically detecting the installation environment temperature of the electronic compass, and further installing the electronic compass It is an example of a method and apparatus for detecting the presence / absence of parking after automatically controlling the temperature with a temperature adjusting device so that the temperature becomes a predetermined allowable temperature and achieving stable operation of the electronic compass.

  As shown in FIG. 9, the vehicle detection apparatus according to the present embodiment includes a two-axis electronic compass 22, a three-axis electronic compass 23, a microcomputer 24, a memory 25, a thermistor 26, a heater 27, and a relay 28. It is installed in. This printed circuit board is potted to suppress the influence of temperature change and light.

  The procedure for detecting the presence or absence of parking, automatically detecting the installation environment temperature of the electronic compass, and automatically heating or cooling the installation environment temperature of the electronic compass to a predetermined allowable temperature based on the flowchart of FIG. Will be described.

In a state where there is no vehicle in the parking space (empty state), the installation environment temperature of the electronic compass is set to an allowable temperature at which the electronic compass keeps stable operation (stable operation allowable temperature of the electronic compass) (T1). The stable operation allowable temperature of this electronic compass is not less than the lower limit value (for example, 40 ° C. or more), not more than the upper limit value (for example, 80 ° C. or less), or not less than the lower limit value and not more than the upper limit value (for example, 40 ° C. or more and 80 ° C. or less). In this embodiment, the allowable temperature for stable operation of the electronic compass is set with a lower limit value.
Further, the geomagnetic level in the empty state is detected and stored in the memory 25 (FIG. 9), and the relay 28 (FIG. 9) is set to “empty” (T2).

  The thermistor 26 (FIG. 9) detects the environmental temperature at which the electronic compass is installed periodically or continuously (T3), and A / D converts the detected analog signal to the microcomputer 24 (FIG. 9). send. In the microcomputer, it is determined whether or not the detected temperature is within the range of allowable stable operation temperature of the electronic compass, that is, whether or not the detected temperature is lower than the lower limit value (T4), and is lower than the lower limit value. In this case, the heater control is turned on (T5) to increase the installation environment temperature of the electronic compass. On the contrary, when the detected temperature is equal to or higher than the lower limit value and the heater control is already ON, the heater control is turned OFF (T6) to suppress further temperature increase. When the detected temperature is equal to or higher than the lower limit value and the heater control is OFF, magnetism detection is performed while maintaining the heater control state (OFF).

As described above, the magnetism of the parking space is detected by the electronic compass 22 (FIG. 9) and the electronic compass 23 (FIG. 9) while maintaining the electronic compass installation environment temperature at the stable operation allowable temperature of the electronic compass. The analog signal is A / D converted and sent to the microcomputer 24 (FIG. 9) (T7).
If there is no change in the detected magnetism, the microcomputer 24 (FIG. 9) determines that the vehicle is in an empty state, and sets the relay 28 (FIG. 9) to “empty”.
On the other hand, if there is a change in the detected magnetism (T8), the thermistor 26 (FIG. 9) continuously detects the environmental temperature at which the electronic compass is installed (T9), and the heater control is turned ON (T10) or OFF ( T11), and the magnetism of the parking space is detected while maintaining the electronic compass installation environment temperature at the stable operation allowable temperature of the electronic compass (T12).
Whether or not there is a change in magnetism can be determined when the detected magnetism exceeds a predetermined reference value, or is stored in the memory 25 (FIG. 9) at the geomagnetic level detected in an empty state ( It can also be determined by the difference between the reference geomagnetic level) and the detected magnetic level.

  When there is a change in the detected magnetism, the detected magnetism continues to change stably (T13), and the stable change state continues for a certain period of time (T14). The microcomputer 24 (FIG. 9) determines that the vehicle is in the vehicle, and sets the relay 28 (FIG. 9) to “present” (T15). In other cases, the microcomputer 24 (FIG. 9) determines that the vehicle is in an empty state, and sets the relay 28 (FIG. 9) to “empty” (T16).

  When the microcomputer 24 (FIG. 9) determines that the vehicle is in an empty state and the relay 28 (FIG. 9) is set to “empty”, the magnetic level detected at that time is stored in the memory 25 (FIG. 9) as the geomagnetic level in the empty state. Store and update (T17).

(Embodiment 4)
Another embodiment of the vehicle detection method and vehicle detection device of the present invention will be described with reference to FIG. This embodiment is an example for explaining the operation at the time of a power failure, and the basic procedure is common to the first to third embodiments.

When a power failure occurs, the voltage drops. When this voltage drop is detected, the microcomputer 24 (FIG. 9) detects the occurrence of a power failure (U1), and sets a power failure flag indicating a power failure state (U2).
When the power failure is resolved and the power supply is restored (U3), the power failure flag set before the power failure is reset (U4).
When the power failure flag is reset, the detection of the environmental temperature at which the electronic compass is installed is resumed, and as a result, the heater control is turned ON or OFF, and the electronic compass installation environmental temperature is maintained at a preset allowable temperature (U5 ). After this, return to the normal procedure.

(Embodiment 5)
The vehicle detection method and the vehicle detection apparatus of the present invention are not limited to those using one electronic compass, and a plurality of electronic compasses can be arranged in a parking space as shown in FIG. In the case of multi-point installation in which a plurality of electronic compasses are arranged, the magnetic detection accuracy is higher than in the case of single-point installation in which one electronic compass is arranged. In the case of multipoint arrangement, if at least one electronic compass detects a magnetic fluctuation, the detected data can be subjected to arithmetic processing such as logical sum and logical product.

  The electronic compass 7 is built in the vehicle detection device 4 (FIG. 12) and distributed in the parking space 2, and the relay device 30 (FIG. 12) collects magnetic level fluctuations output from the electronic compass of the vehicle detection device 4. Discriminating and detecting (FIG. 12), or being distributed directly in the space 2 without being incorporated in the vehicle detection device 4 (FIG. 12), and the magnetic level fluctuation transmitted from these electronic compasses is controlled by the control unit 32 (FIG. 13). The microcomputer, the memory, the output circuit, etc. in FIG.

(Embodiment of vehicle detection unit)
An embodiment of a vehicle detection unit of the present invention will be described with reference to FIGS. FIG. 1 shows that when the vehicle detection device 4 of the present invention detects the presence of the vehicle 3 in the parking space 2, the car stop device 1 is activated to restrict the vehicle from being delivered. The vehicle detection device 4 is built in the range indicated by the hatched portion in FIG. 3 of the vehicle stop device 1, that is, the vehicle detection device 4 and the vehicle stop device 1 are integrated. More specifically, only the electronic compass, or both of the electronic compass and the determination processing unit for determining the presence or absence of the vehicle based on the fluctuation of the magnetic level detected by the electronic compass, are built in or removed from the case of the car stop device 1. It is attached.

(Embodiment of warehousing discrimination detection)
An embodiment of warehousing determination detection by the vehicle detection method and the vehicle detection device of the present invention will be described with reference to FIG. This embodiment is an example of a method for discriminating and detecting whether or not the vehicle 3 has been received from a state in which the vehicle 3 has not entered the parking space 2 (empty state: outgoing state). The method is the same as in the first to fifth embodiments. In FIG. 14, if it is determined that there is a possibility of warehousing in each process of V1 to V14, the process proceeds to the processes of V1 to V11 sequentially, and in other cases, the process returns to the previous process.

  The electronic compass 7 (FIG. 2) installed in the parking space 2 constantly and repeatedly detects the magnetic level at short time intervals (for example, once every 200 milliseconds) (V1, V2). Magnetic level detection is performed for the three axes X, Y, and Z. If the measured value of the magnetic level detected by V2 exceeds a predetermined reference value (reference value for fluctuation detection), it is determined that there is fluctuation. Then, the process proceeds to the next step (V3). The variation that advances to the next process is hereinafter referred to as “determination variation”.

  At V4, it is determined whether or not the magnetic level of the determination variation detected at V3 is stable. This stability determination is performed, for example, when 75% of the magnetic level detected 30 times (that is, 30 times × 200 milliseconds / time = 6 seconds) counted from the determination variation is within a predetermined range (average value of 30 times ± 1), etc., it is judged to be stable. If it is determined that the magnetic level is stabilized by such a method (Yes in V4), the process proceeds to the next step (V5). If it is determined that the magnetic level is not stable (No in V4), the magnetic level is detected again 30 times. Judge the stability of. During the determination of the stability of the magnetic level, that is, among the 30 detections, the peak width of the Z axis is calculated (V3) and stored in the memory 13 (FIG. 2).

  At the beginning of installing the electronic compass 7 in the parking space 2, the electronic compass 7 is calibrated (value adjustment) in an unoccupied state (empty vehicle), and the initial value of the geomagnetic level set at this time is used as a calibration value (point S). ) In the memory 13.

In V5, the magnetic level at the time when it is determined to be stable in V4 and the calibration value (point S) are compared for each of the X, Y, and Z axes of the electronic compass 7 and if all the axes match, it is determined that the goods are not in stock. It judges and returns to a normal detection state (V1), and if any one axis | shaft does not correspond, there exists a possibility of warehousing and it progresses to the following process (V6).
Note that whether or not the magnetic levels performed for each axis match is determined to be the same when both magnetic levels to be compared are the same value or the difference is ± 1. However, the value of “range ± 1” (reference difference value) can be arbitrarily selected according to the situation.

  At V6, the magnetic level when it is determined to be stable at V4 is stored in the memory 13 (FIG. 2) as the “determination magnetic level” (V6), and the process proceeds to the next step (V7).

In V7, whether or not the peak width of the Z-axis after the fluctuation of the magnetic level (V2) is sufficiently large to occur due to the warehousing of the vehicle, specifically by comparison with a reference value (reference value for maximum value determination). Determine the possibility of receipt. The magnetic level fluctuates even by placing an empty can or the like in the parking space 2, but such fluctuation due to disturbance (hereinafter referred to as fluctuation in disturbance) is a factor of erroneous determination and must be excluded from the warehousing determination. In general, disturbance fluctuations such as empty cans are sufficiently smaller than magnetic level fluctuations due to movement of the vehicle. Therefore, disturbance fluctuations can be eliminated by judging the magnitude of the fluctuation amount.
In the present embodiment, if the Z-axis peak width after fluctuation of the magnetic level (V2) is less than 7, the normal detection state (V1) is returned, and if it is 7 or more, fluctuation caused by the vehicle, that is, warehousing. Since there is a possibility of this, it progresses to the following process (V8). This numerical value 7 can be set to an arbitrary numerical value.

In V8, the possibility of warehousing depends on whether or not the time taken from the detection of the variation for determination in V2 until it is determined to be stable in V4 (hereinafter referred to as the stable time) is long enough to be generated by the warehousing of the vehicle. Judging. In general, when a vehicle enters the vehicle, the driving operation such as switching the vehicle is performed, so the length of the stable time is longer than the reference value (the reference time for warehousing) because it is sufficiently longer than the stabilization time due to disturbance fluctuations such as empty cans. By determining whether or not, disturbance fluctuation can be removed.
In the present embodiment, if the stabilization time is less than 4 seconds, the normal detection state (V1) is returned. If the stabilization time is 4 seconds or more, it is assumed that there is a possibility of a change due to the vehicle, that is, warehousing. Go to V9). In this case, the calculation of the stabilization time is performed using a magnetic level detected after the determination variation that falls within a predetermined range (a range similar to that at the time of determining the stability of the magnetic level at V4). For example, if the magnetic level is detected 60 times from the determination variation to the magnetic stability and 50 magnetic levels are within the predetermined range, the stabilization time is 50 times × 200 milliseconds / time = 10 seconds. Become.

After the electronic compass 7 is installed in the parking space 2, the loading and unloading is repeated several times. Each time, a change in the magnetic level is detected to determine whether the goods are received or not.
V9 compares the past magnetic level determined as not received in the above with the discrimination magnetic level stored in V4, and if it matches any of the past unentry magnetic levels, this time as well. It is determined that the goods have not been received. Hereinafter, a specific description will be given based on FIG.
If the empty can 1 is installed in the unoccupied state (point A), it is possible that a variation for determination may be detected, but as a result, it is determined that the container has not yet been received. Similarly, even if the empty can 2 is installed in the unoccupied state (point B), a change for determination may be detected, but as a result, it is determined that the container is not yet received. Since the magnetic level (point A or point B) immediately before the change for determination when it is determined as not yet received in this way is in the non-entry state, the magnetic level (point A or point B) immediately before these changes is V4. The discrimination magnetic level (point D) when it is determined to be stable is compared for each axis of the electronic compass 7 (FIG. 2), and if all the axes match, it is determined that there is no warehousing and the normal detection state (V1) If any one of the axes does not match, the process proceeds to the next step (V10) because there is a possibility of warehousing.
Whether or not the magnetic levels performed for each axis match is determined to be the same when both magnetic levels to be compared are the same value or the difference is ± 1 as in V5. However, the value of “range ± 1” (reference difference value) can be arbitrarily selected according to the situation.

Immediately before the change for determination detected in V2, it is in a non-warehousing state, so it can be determined that it is not in stock if it matches the ground level at this time.
That is, V10 compares the magnetic level immediately before the determination variation detected at V2 (point C) with the determination magnetic level stored at V4 (point D), and X, X of the electronic compass 7 (FIG. 2). Comparing for each of the Y and Z axes, if all the axes match, it is determined that the goods have not been received and returns to the normal detection state (V1). Proceed to step (V11).
Whether or not the magnetic levels performed for each axis match is determined to be the same when both magnetic levels to be compared are the same value or the difference is ± 1 as in V5. However, the value of “range ± 1” (reference difference value) can be arbitrarily selected according to the situation.

In V11, the warehousing judgment is confirmed and the relay 28 (FIG. 9) is turned ON.
For determination at the time of leaving, the magnetic level (point C) immediately before the change for determination detected at V2 is stored in the memory 13 (FIG. 2) for each axis of the electronic compass 7 (FIG. 1). The “state” and the magnetic level for determination (point D) stored in V4 are stored in the memory 13 for each axis of the electronic compass 7.
Since the warehousing has been confirmed, the warehousing is monitored thereafter (V14).
In addition, in this embodiment, although the case where it judges by the process of V5 and V7-V10 was demonstrated in performing warehousing judgment, 1 or 2 processes or more were selected from 5 processes of V5, V7-V10, and from the process You may judge. Moreover, in order to judge, the order of a process may be arbitrary. The above-mentioned “select a process” means selecting which function (function to execute five processes of V5, V7 to V10) in the vehicle detection device, or installed in a vehicle detection area or the like. The function to be executed is selected from the functions of the vehicle detection device. In other words, the vehicle detection device is provided with a function to perform the selected process by selecting which process is to be performed among the five processes V5 and V7 to V10 in advance, and the warehousing determination is performed by all the functions provided. Select which process to perform (that is, which function to perform) from among the cases and functions (functions for executing five processes V5 and V7 to V10) that the vehicle detection device already installed has. In other words, it means both the case where the warehousing determination is performed by the selected function. The same applies to the “embodiment of detection detection after delivery” and “embodiment of detection detection after power return from power failure” described below.

(Embodiment of detection detection)
An embodiment of the detection of the departure by the vehicle detection method and the vehicle detection device of the present invention will be described with reference to FIGS. 15 and 16. This embodiment is an embodiment of a method for discriminating and detecting whether or not the vehicle 3 has been delivered from the state in which the vehicle 3 is in the parking space 2 (inbound state). This is the same as in the first to fifth embodiments. In FIG. 15, when it is determined that there is a possibility of leaving in each process of W1 to W7, the process proceeds to the process of W8 sequentially, and in other cases, the process returns to the previous process.

  Since the electronic compass 7 (Fig. 1) installed in the parking space 2 is the same as that at the time of warehousing determination detection, the magnetic level is detected repeatedly and constantly at short intervals (for example, once every 200 milliseconds). (W1: FIG. 15), the detection of the magnetic level for the three axes X, Y, and Z is the same as when the warehousing determination is detected. Further, when the actually measured value V3 (FIG. 14) of the detected magnetic level exceeds a predetermined reference value (reference value for fluctuation detection), it is determined that there is a fluctuation and the process proceeds to the next step (W2). The change to the next process is referred to as “determination change”, and the stability determination as to whether or not the detected change in the magnetic level is stable is the same as in the warehousing determination detection. The fact that the calibration value (point S) is stored in the memory 13 (FIG. 2) is the same as when the warehousing determination is detected.

In W3 of FIG. 15, it is determined whether or not the magnetic level after the determination variation is stable. If it is determined that the magnetic level is stable (Yes in W3), the process proceeds to the next step (W4). If it is determined that the magnetic level is not stable (No in W3), the magnetic level is detected again 30 times to stabilize the magnetic level. to decide.
The magnetic level at the time when it is determined to be stable at W3 is stored in the memory 13 as a magnetic level for discrimination (W4), and the process proceeds to the next step (W5). Details of the step W5 will be described with reference to FIG.

In X2 of FIG. 16, the discrimination magnetic level (point E) stored in W4 and the calibration value (point S) are compared for each of the X, Y, and Z axes of the installed electronic compass 7 (FIG. 1). If all the axes match, the exit determination is confirmed (X13), and if any one of the axes does not match, it is determined that the warehousing may be continued and the process proceeds to the next step (X3).
Note that whether or not the magnetic levels performed for each axis match is determined to be the same when both magnetic levels to be compared are the same value or the difference is ± 1. However, the value of “range ± 1” (reference difference value) can be arbitrarily selected according to the situation.

In X3, X, Y, Z of the electronic compass 7 in which the magnetic level (point A) immediately before the variation for determination detected in W2 in FIG. 15 and the magnetic level for determination (point E) stored in W4 are installed. If all the axes match, the continuation of the warehousing is confirmed (X15). If any one of the axes does not match, the warehousing may be continued and the process proceeds to the next step (X4).
Note that whether or not the magnetic levels performed for each axis match is determined to be the same when both magnetic levels to be compared are the same value or the difference is ± 1. However, the value of “range ± 1” (reference difference value) can be arbitrarily selected according to the situation.

  X4 to X10 are processes repeatedly performed for each axis of the electronic compass 7.

As shown in FIG. 16, the vehicle enters from the leaving state (point A), the magnetic level fluctuates (point B), and a fluctuation amount Δa (hereinafter referred to as initial fluctuation amount at the time of entry) is generated. The case where the magnetic level becomes point C upon receiving the disturbance fluctuation Δc, the magnetic level becomes point D after receiving the disturbance fluctuation Δd, and finally the magnetic level becomes point E due to Δd generated by the delivery.
In X5, the departure determination is performed by comparing the initial fluctuation amount Δa at the time of entry and the latest fluctuation amount Δd at the time of arrival among the fluctuation amounts after the warehousing (after point B) (hereinafter referred to as fluctuation amount at the time of vehicle presence). . In this case, if the initial variation amount Δa at the time of entry and the latest variation amount Δd when in the vehicle are offset, the determination of the other axis is started (X4) assuming that the exit condition is satisfied for the axis (X11).
Note that this canceling judgment is determined that the canceling judgment is established when both of the fluctuation amounts to be compared are opposite in polarity and the absolute values of the fluctuation amounts are exactly the same or the difference is ± 1. However, the value of the “range ± 1” can be arbitrarily selected according to the situation.

In X6, the sum total of the on-vehicle fluctuation amount (Δb, Δc, Δd) after warehousing (after point B), that is, Δb + Δc + Δd is calculated.
In X7, the initial change amount Δa at the time of entry is compared with this total Δb + Δc + Δd to make a delivery decision. In this case, when the initial fluctuation amount Δa at the time of entry and the total Δb + Δc + Δd are offset, it is determined that the exit condition is satisfied for the relevant axis (X11), and the determination of the other axis is started (X4). This canceling determination is the same as in X5.

In X8, the variation amount Δe resulting from the difference between the discrimination magnetic level (point E) stored in W4 and the magnetic level of the unloading state (point A) before the vehicle is stored is calculated.
In X9, the fluctuation amount Δe is compared with the fluctuation amount (Δb, Δc, Δd) when the vehicle is in the vehicle (after point B). Specifically, the variation Δe and the on-vehicle variation Δb, the variation Δe and the on-vehicle variation Δc, and the variation Δe and the on-vehicle variation Δd are compared.
Further, the fluctuation amount Δe can be compared with two or more sums (Δb + Δc, Δb + Δc + Δd, etc.) of the on-vehicle fluctuation amounts (Δb, Δc, Δd) after warehousing (after point B).
If there is any one of these compared combinations that can be canceled, it is determined that the delivery condition is satisfied for the relevant axis (X11), and the determination of the other axis is started (X4). This canceling determination is the same as in X5.

As described above, X4 to X10 are repeated for each axis of the electronic compass 7. As a result, out of X5, X7, or X9 processes, if there is at least one process (all axes go through X11) in all axes (Yes in X12), the exit determination is confirmed. (X13) If even one axis does not match (No in X12), the process proceeds to the next step (X14) as continuation of goods receipt (X12).
In X14, the current fluctuation is determined as disturbance fluctuation and stored in the memory 13.
In the present embodiment, the case where the determination is made based on the processes of X2, X3, X5, X7, and X9 has been described in making the delivery determination. However, one or more of the five processes of X2, X3, X5, X7, and X9 are used. You may select a process and judge from the process. Moreover, in order to judge, the order of a process may be arbitrary.

As described above, the delivery confirmation (X13) or the continuation of goods receipt (X14) is determined. If the warehousing is continued, the relay 28 (FIG. 9) is kept ON (W7), and if the delivery is confirmed, the race 28 is turned off ( W8).
In W9, the “shipping state” and the magnetic level for discrimination (point E) stored in W4 are stored in the memory 13 for each axis of the electronic compass 7.
Since the delivery has been confirmed, warehousing is monitored thereafter (W10).

(Embodiment for detection of detection after power return from power failure)
Another embodiment of the vehicle detection method and the vehicle detection device of the present invention will be described with reference to FIG. In this embodiment, when a power failure occurs in a state where the vehicle 3 enters or leaves the parking space 2 and then returns to the energized state, it is determined whether the vehicle 3 is entering or leaving the parking space 2. This is an embodiment of the method, and the basic discrimination detection method is the same as that of the first to fifth embodiments.

  When energization returns from the power failure state, the process starts (Z1).

  At the beginning of installing the electronic compass 7 in the parking space 2, the electronic compass 7 is calibrated (value adjustment) in an unoccupied state, and the initial value of the geomagnetic level set at this time is stored in the memory 13 as a calibration value. Keep it. However, since this calibration value may be lost from the memory 13 due to the occurrence of a power failure, the presence of the calibration value in the memory 13 is confirmed in Z2. If there is a calibration value, the process proceeds to the next step (Z4). If not, the calibration value is obtained again and stored in the memory 13 (Z3).

  In Z4, the warehousing / unloading state stored in the memory 13 immediately before the power failure and the magnetic level for each axis of the electronic compass 7 are acquired.

  In Z6, it is determined whether or not the magnetic level after energization is stabilized. This stability determination is made, for example, when 75% of the magnetic level detected 30 times (that is, 30 times × 200 milliseconds / times = 6 seconds) from the return of energization is within a predetermined range (average value of 30 times ± 1) Etc.) can be judged as stable. If it is determined that the magnetic level is stabilized by such a method (Yes in Z6), the process proceeds to the next step (Z7). If it is determined that the magnetic level is not stable (No in Z6), the magnetic level is detected again 30 times. Judge the stability of the.

In Z7, the magnetic level when it is determined to be stable is stored in the memory 13 as a magnetic level for determination, and the process proceeds to the next step (Z8).

In Z8, the discrimination magnetic level stored in Z7 and the calibration value are compared for each axis of the installed electronic compass 7.
If all the axes match, the exit determination is confirmed, the relay 28 (FIG. 9) is turned off (Z9), and the “exit state” is stored in the memory 13 for each axis of the electronic compass 7 (Z10).
If even one axis does not match, the process proceeds to the next step (Z11).

In Z11 and Z12, the discrimination magnetic level stored in Z7 and the magnetic level stored in the memory 13 immediately before the power failure are compared for each axis of the installed electronic compass 7.
Whether or not the magnetic levels performed for each axis match is determined to be the same when both magnetic levels to be compared are the same value or the difference is ± 1 as in V5. However, the value of the “range ± 1” can be arbitrarily selected according to the situation.
If all axes match, it is determined that the entry / exit determination before the power failure is continued (Z13). That is, if the pre-power failure state is the shipping state, the relay 28 is kept off (Z14) and the “shipping state” is stored in the memory 13 for each axis of the electronic compass 7 (Z10). The On of the relay 28 is maintained (Z15), and the “entry state” is stored in the memory 13 for each axis of the electronic compass 7 (Z16).

As a result of comparison between Z11 and Z12, if there is something that does not match even on one axis, the relay 28 is turned off (Z17), and the steps Z18 to Z27 are performed in the same manner as the steps Z5 to Z16.
As a result of the comparison at Z24, if there is any one axis that does not match, return to Z18 and repeat the steps Z18 to Z27.

(Other embodiments)
The electronic compass used in the vehicle detection method and the vehicle detection device of the present invention is not limited to the two-axis type that detects magnetism in the width direction (X axis) and the longitudinal direction (Y axis), but in the width direction. A triaxial type that can detect magnetism from the three directions of the height direction (Z axis) in addition to the (X axis) and the longitudinal direction (Y axis) can also be used. When a three-axis type electronic compass is used, magnetic changes can be measured more accurately than when a two-axis type electronic compass is used.

  The measurement of the change in magnetism by the electronic compass is not limited to the constant measurement as described above, but can be measured at regular intervals.

  The vehicle detection method and the vehicle detection device of the present invention are not limited to vehicle detection, and various things such as the movement of people at the ticket gates of stations and entrances and exits of venues, confirmation of the number of movements of vehicles other than cars such as animals or trains, etc. The present invention can also be applied to a method for detecting presence / absence, a detection device, and a detection unit.

Plane explanatory drawing which shows an example of embodiment of the vehicle detection apparatus of this invention. The block diagram which shows the structure of the vehicle detection apparatus of FIG. Plane | planar explanatory drawing in the case of incorporating the vehicle detection apparatus of this invention in a vehicle stop apparatus. Plane | planar explanatory drawing in the case of arrange | positioning the vehicle detection apparatus of this invention to a vehicle stop apparatus periphery. Plane explanatory drawing in the case of arrange | positioning the vehicle detection apparatus of this invention in the parking space which does not have a vehicle stop apparatus. The flowchart explaining the procedure which detects the presence or absence of a vehicle with the vehicle detection apparatus of FIG. 1, and operates a vehicle stop apparatus when the vehicle is parked on the parking space. Plane explanatory drawing which shows another example of embodiment of the vehicle detection apparatus of this invention. The flowchart explaining the procedure which detects the presence or absence of parking, after controlling the installation environmental temperature of an electronic compass automatically with a heating and cooling machine and aiming at the stable operation | movement of an electronic compass. The block diagram which shows the structure of the vehicle detection apparatus shown to the flowchart of FIG. The flowchart explaining the procedure which detects the presence or absence of parking when a power failure occurs. Plane | planar explanatory drawing in the case of arrange | positioning multiple vehicle detection apparatuses of this invention in a parking space. Plane | planar explanatory drawing in the case of arrange | positioning the vehicle detection apparatus of this invention multi-point, and arrange | positioning a relay apparatus. Plane | planar explanatory drawing in the case of arrange | positioning the vehicle detection apparatus of this invention multi-point, and arrange | positioning a control part. The flowchart explaining the procedure which detects the presence or absence of parking at the time of warehousing determination. The flowchart explaining the procedure which detects the presence or absence of parking at the time of leaving determination. The flowchart explaining the detailed procedure which detects the presence or absence of parking at the time of leaving determination. The flowchart explaining the detailed procedure of detecting the presence or absence of parking when a power failure occurs.

DESCRIPTION OF SYMBOLS 1 Car stop device 2 Parking space 3 Vehicle 4 Vehicle detection device 5 Flap board 6 Case 7 Electronic compass 10 A / D conversion circuit (X axis)
11 A / D conversion circuit (Y axis)
12 Processing circuit (microprocessor)
DESCRIPTION OF SYMBOLS 13 Memory 14 Thermistor 15 Output circuit 16 Power supply 17 Serial communication 20 Vehicle passage 21 Gate 22 2-axis electronic compass 23 3-axis electronic compass 24 Microcomputer 25 Memory 26 Thermistor 27 Heater 28 Relay 29 Printed circuit board 30 Relay device 31 Electronic compass 32 Control unit

Claims (15)

A magnetic sensor that can detect the magnetism of any two or more of the X axis, the Y axis, and the Z axis is installed in or near the vehicle detection area, and the magnetic sensor detects a change in magnetism associated with the presence or absence of the vehicle, A method for detecting the presence or absence of a vehicle in a vehicle detection area,
In detecting the vehicle approach to the vehicle detection area, the following 1 to 3 determination steps, 4 to 8 determination steps, one or more determination steps, and 9 determination steps are performed to determine the magnetic level associated with the vehicle movement. A vehicle detection method characterized by discriminating fluctuations and magnetic level fluctuations caused by factors other than vehicle movement.
1. A step of determining that when the amount of fluctuation of the magnetic level detected in the vehicle detection area in the absence of the vehicle exceeds a reference value, the variation at this time is stored as “determination variation” and the process proceeds to the next step 2;
2. A step of determining whether or not the magnetic level after the “determination variation” in step 1 is kept stable for a predetermined time;
3. If it is determined in step 2 that the stable holding is performed, this magnetic level is stored as a “discrimination magnetic level”, and it is determined that the process proceeds to the next process. If it is determined that the magnetic level is not stable, the process returns to the detection state. The process of judging,
4). A step of comparing the initial setting value of the geomagnetic level when the vehicle is not present and the "determination magnetic level" stored in the step 3, and determining the presence of the vehicle and the possibility of the vehicle based on the difference;
5. Comparing the maximum value of the magnetic level detected after the “variation for determination” in step 1 with a reference value, and determining the presence of a vehicle and the presence of a vehicle based on this difference;
6). The time required from the “variation for determination” in step 1 to the determination that the magnetic level is stably maintained in step 3 is compared with the reference time, and this difference indicates the possibility of vehicle absence and vehicle presence. A process of determining whether there is,
7). The “discrimination magnetic level” stored in step 3 is compared with the “discrimination magnetic level” of all histories that have been previously determined to be non-existent. A process of determining the possibility of vehicle presence,
8). The magnetic level in the absence of the vehicle detected immediately before the “determination for determination” in the step 1 is compared with the “magnetic level for determination” stored in the step 3, and the difference between the absence of the vehicle and the presence of the vehicle is determined by this difference. A process of determining the possibility,
9. A step of determining that the vehicle has entered the vehicle detection area based on the result of the determination step of any one or more of 4 to 8. A magnetic sensor that can detect the magnetism of any two or more of the X axis, the Y axis, and the Z axis is installed in or near the vehicle detection area, and the magnetic sensor detects a change in magnetism associated with the presence or absence of the vehicle, A method for detecting the presence or absence of a vehicle in a vehicle detection area,
In detecting the exit of the vehicle from the vehicle detection area, the following 1 to 3 determination steps, any one or more of 4 to 8 determination steps, and 9 determination steps are performed . A vehicle detection method characterized by discriminating fluctuations and magnetic level fluctuations caused by factors other than vehicle movement.
1. A step of storing the fluctuation at this time as a “determination fluctuation” and proceeding to the next step 2 when the fluctuation amount of the magnetic level detected in the vehicle detection area in the presence of the vehicle exceeds a reference value;
2. A step of determining whether or not the magnetic level after the “determination variation” in step 1 is kept stable for a predetermined time;
3. If it is determined in step 2 that the stable holding is performed, this magnetic level is stored as a “discrimination magnetic level”, and it is determined that the process proceeds to the next process. If it is determined that the magnetic level is not stable, the process returns to the detection state. The process of judging,
4). The initial setting value of the geomagnetic level when the vehicle is not present in the vehicle detection area is compared with the “determination magnetic level” stored in the step 3, and the vehicle absence and vehicle existence in the vehicle detection area can be determined based on this difference. A process of determining whether there is sex,
5. The magnetic level at the time of vehicle presence detected immediately before the “determination fluctuation” in the step 1 is compared with the “magnetic level for determination” stored in the step 3, and the vehicle can be absent and the vehicle can be present by this difference. A process of determining whether there is sex,
6). Regarding the “discriminating magnetic level” that has been determined to be stable after the “decision variation” that has occurred since the vehicle entry was detected, the difference between the previous and next “discrimination magnetic levels” was defined as the “amount of on-vehicle variation”. Compares the latest "Variation when vehicle is present" with the "Initial variation when entering", which is the variation of the magnetic level caused by "Variation for judgment" when vehicle entry is detected. A process of determining the absence of vehicles in the area and the possibility of vehicle presence,
7). The “initial change amount at the time of entry” described in the step 6 is compared with the change amount obtained by summing up the “change amounts at the time of vehicle presence” described in the step 6, and the vehicle absence and the vehicle presence in the vehicle detection area are compared by the difference. The process of determining the possibility of
8). The difference between the magnetic level in the absence of the vehicle immediately before the “determination change” when the vehicle approach is detected and the “determination magnetic level” stored in the step 3, and each “in-vehicle change” described in the step 6 A step of comparing any one or a combination of two or more of the “quantity”, and determining the presence of a vehicle in the vehicle detection area and the possibility of vehicle presence based on the difference,
9. A step of determining vehicle exit from the vehicle detection area based on the result of the determination step of any one or more of 4 to 8. A magnetic sensor that can detect the magnetism of any two or more of the X axis, the Y axis, and the Z axis is installed in or near the vehicle detection area, and the magnetic sensor detects a change in magnetism associated with the presence or absence of the vehicle, A method for detecting the presence or absence of a vehicle in a vehicle detection area,
Detecting the occurrence of a power failure or energization return, detecting the presence or absence of a vehicle in the vehicle detection area after the return as well as before the power failure,
In the detection of the presence or absence of the vehicle in the vehicle detection area at the time of power return, the following 1 to 3 determination steps, 4 or 5 determination steps or both, and 6 determination steps are performed to move the vehicle. A vehicle detection method characterized by discriminating a fluctuation in magnetic level due to a magnetic field and a fluctuation in magnetic level due to factors other than vehicle movement.
1. Storing the magnetic level immediately before the power failure and the presence or absence of the vehicle;
2. A step of determining whether or not the magnetic level after the return of energization keeps stable for a predetermined time when energization is restored;
3. If it is determined in the step 2 that the stable holding is performed, this magnetic level is stored as a “determination magnetic level”, and it is determined that the process proceeds to the next process. If it is determined that the magnetic level is not stable, the detection state is returned. The process of judging,
4). The initial setting value of the geomagnetic level when the vehicle is not present in the vehicle detection area is compared with the “determination magnetic level” stored in the step 3, and the vehicle absence and vehicle existence in the vehicle detection area can be determined based on this difference. A process of determining whether there is sex,
5. The magnetic level immediately before the power failure is compared with the “discriminating magnetic level” stored in Step 3, and it is determined from this difference that the vehicle in the vehicle detection area before power failure stored in Step 1 is present or absent. Process,
6). A step of discriminating the presence or absence of a vehicle in the vehicle detection area based on the result of the discrimination step of either one or both of 4 and 5. The vehicle detection method as claimed in any one of claims 1 to 3, a magnetic sensor or the installation environment temperature detected automatically, the magnetic sensor when the detected temperature is outside the range of stable operation allowable temperature of the magnetic sensor of such installation environment temperature is the allowable temperature, in a state in which a magnetic sensor or the installation environment temperature to ensure temperature control and stable operation of the magnetic sensors, and characterized by detecting the presence or absence of a vehicle in the vehicle detection area Vehicle detection method. The vehicle detection method according to any one of claims 1 to 4 ,
Two or more magnetic sensors are installed in or near the vehicle detection area,
A vehicle detection method that detects presence or absence of a vehicle in a vehicle detection area based on a change in magnetism detected by these magnetic sensors . The vehicle detection method according to any one of claims 1 to 5, wherein the magnetic sensor is an electronic compass. A magnetic sensor capable of detecting the magnetism of any two or more of the X, Y, and Z axes in or near the vehicle detection area;
A discrimination processing unit for discriminating the presence or absence of a vehicle based on a magnetic change detected by the magnetic sensor;
A device for detecting the presence or absence of a vehicle in a vehicle detection area comprising:
The discrimination processing unit has the following functions 1 to 3, a discrimination function of any one or two or more of 4 to 8, and a function 9 in detecting the vehicle entry into the vehicle detection area.
A vehicle detection device capable of discriminating a fluctuation in magnetic level due to movement of a vehicle and a fluctuation in magnetic level due to factors other than movement of the vehicle.
1. When the amount of variation in the magnetic level detected by the vehicle detection area when the vehicle absence exceeds the reference value, the variation of this time is stored as a "determination for change" function of determining to proceed to the next function 2,
2. Functional magnetic level after "determination fluctuation" of the function 1 determines whether to maintain a stable and continued for a predetermined time,
3. When the function 2 is determined to be stable, the magnetic level is stored as a “discriminating magnetic level” and it is determined to proceed to the next function . When it is determined to be unstable, the detection state is returned to. The ability to judge,
4). The initial setting value of the geomagnetic level in the absence of the vehicle is compared with the “determination magnetic level” stored in the function 3, and the difference between the vehicle detection area and the presence of the vehicle is determined based on the difference. The ability to
5. Ability to discrimination of there is a possibility of vehicle absence and the vehicle presence as compared to the maximum value and the reference value of the magnetic levels detected after "determination fluctuation" vehicle detection area by this hidden of the function 1,
6). The time required from the “variation for determination” of the function 1 to the time when it is determined that the magnetic level is stably held by the function 3 is compared with the reference time. ability to discrimination of there is a possibility of presence,
7). The “discrimination magnetic level” stored in the function 3 is compared with the “discrimination magnetic level” of all histories that were previously determined to be non-existent and stored in the vehicle detection area. The ability to distinguish between the absence of a vehicle and the possibility of vehicle presence,
8). The magnetic level in the absence of the vehicle detected immediately before the “variation for determination” in the function 1 is compared with the “magnetic level for determination” stored in the function 3, and the difference between the absence of the vehicle and the presence of the vehicle is determined by this difference. A function to determine the possibility,
9. A function of determining that the vehicle has entered the vehicle detection area based on the result of the determination function of any one or two or more of 4 to 8. A magnetic sensor capable of detecting the magnetism of any two or more of the X, Y, and Z axes in or near the vehicle detection area;
A discrimination processing unit for discriminating the presence or absence of a vehicle based on a magnetic change detected by the magnetic sensor;
A device for detecting the presence or absence of a vehicle in a vehicle detection area comprising:
The discrimination processing unit has the following functions 1 to 3, a discrimination function of any one or more of 4 to 8, and a function 9 for detecting vehicle exit from the vehicle detection area,
A vehicle detection device capable of discriminating a fluctuation in magnetic level due to movement of a vehicle and a fluctuation in magnetic level due to factors other than movement of the vehicle.
1. When the amount of variation in the magnetic level detected by the vehicle detection area of the vehicle there is more than the reference value, the variation of this time is stored as a "determination for change" function of determining to proceed to the next function 2,
2. Functional magnetic level after "determination fluctuation" of the function 1 determines whether to maintain a stable and continued for a predetermined time,
3. When the function 2 is determined to be stable, the magnetic level is stored as a “discriminating magnetic level” and it is determined to proceed to the next function . When it is determined to be unstable, the detection state is returned to. The ability to judge,
4). The initial setting value of the magnetic level in the absence of the vehicle is compared with the “determination magnetic level” stored in the function 3, and the difference between the vehicle detection area and the presence of the vehicle is determined based on the difference. Function to
5. The magnetic level at the time of vehicle presence detected immediately before the “variation for determination” of the function 1 is compared with the “magnetic level for determination” stored in the function 3, and this difference indicates that the vehicle is not present in the vehicle detection area. A function to determine the possibility of vehicle presence,
6). Regarding the “discriminating magnetic level” that has been determined to be stable after the “decision variation” that has occurred since the vehicle entry was detected, the difference between the previous and next “discrimination magnetic levels” was defined as the “amount of on-vehicle variation”. Compares the latest "Variation when vehicle is present" with the "Initial variation when entering", which is the variation of the magnetic level caused by "Variation for judgment" when vehicle entry is detected. A function to determine the absence of vehicles in the area and the possibility of vehicle presence,
7). The “initial change amount at the time of entry” described in the function 6 is compared with the change amounts obtained by summing up the “change amounts at the time of vehicle presence” described in the function 6, and the vehicle absence and vehicle presence in the vehicle detection area are compared by the difference. ability to the possibly of discrimination,
8). The difference between the magnetic level in the absence of the vehicle immediately before the “determination variation” when the vehicle approach is detected and the “determination magnetic level” stored in the function 3, and each “in-vehicle variation” described in the function 6 comparing the combination any one or more of the amount "respectively, function to the likelihood there is determined in the vehicle absence and the vehicle presence of the vehicle detection area by its hidden,
9. A function of determining that the vehicle has left the vehicle detection area based on a result of the discrimination function of any one of 4 to 8 or more. A magnetic sensor capable of detecting the magnetism of any two or more of the X, Y, and Z axes in or near the vehicle detection area;
A discrimination processing unit for discriminating the presence or absence of a vehicle based on a magnetic change detected by the magnetic sensor;
A power failure detector that detects the occurrence of a power failure or the return of power,
A device for detecting the presence or absence of a vehicle in a vehicle detection area comprising:
The determination processing unit hits the discrimination detection of presence or absence of a vehicle in the vehicle detection area during energization return, the function of the next 1 to 3, 4 or either one or both of the discrimination function of the 5, 6 of the discrimination function Prepared,
A vehicle detection device capable of discriminating a fluctuation in magnetic level due to movement of a vehicle and a fluctuation in magnetic level due to factors other than movement of the vehicle.
1. A function to store the magnetic level immediately before the power failure and the presence or absence of the vehicle,
2. A function to determine whether or not the magnetic level after the return of energization remains stable for a predetermined time when energization is restored;
3. When the function 2 is determined to be stable, the magnetic level is stored as a “discriminating magnetic level” and it is determined to proceed to the next function . When it is determined to be unstable, the detection state is returned to. The ability to judge,
4). The initial setting value of the geomagnetic level in the absence of the vehicle is compared with the “determination magnetic level” stored in the function 3, and the difference between the vehicle detection area and the presence of the vehicle is determined based on the difference. Function to
5. The magnetic level immediately before the power failure is compared with the “discriminating magnetic level” stored in the function 3, and based on this difference, it is determined that the vehicle in the vehicle detection area before the power failure stored in the function 1 is present or absent. Function ,
6). A function of discriminating the presence or absence of a vehicle in the vehicle detection area based on the result of the discrimination function of either one or both of 4 and 5. The vehicle detection apparatus according to any one of claims 7 to 9, comprising a temperature sensor for automatically detecting a magnetic sensor or the installation environment temperature, temperature detected by the temperature sensor is a magnetic sensor stable operation allowable temperature A vehicle detection device comprising a magnetic sensor or a temperature adjustment device capable of adjusting the installation environment temperature so that the installation environment temperature of the magnetic sensor is equal to the allowable temperature when the temperature is outside the range. The vehicle detection device according to any one of claims 7 to 10,
A vehicle detection device comprising two or more magnetic sensors and capable of detecting the presence or absence of a vehicle in a vehicle detection area based on magnetic changes detected by these magnetic sensors. The vehicle detection device according to claim 11 ,
Discrimination processing unit, two or more positions of the magnetic sensors installed in the vehicle detection area aggregates magnetic variation caused by vehicle presence has been detected, vehicle detection device, characterized in that is capable discrimination processed collectively. The vehicle detection device according to claim 11 ,
A discrimination processing unit for individually discriminating and processing magnetic fluctuations associated with the presence or absence of a vehicle detected by a magnetic sensor in a vehicle detection area is provided for each magnetic sensor .
A vehicle detection device comprising a relay device that aggregates the discrimination results processed by the discrimination processing unit, and the relay device transmits the aggregated data to a terminal device that is controlled according to the discrimination result. apparatus. The vehicle detection device according to claim 7, wherein the magnetic sensor is an electronic compass. A vehicle detection device according to any one of claims 7 to 14,
A vehicle stopping device that regulates the exit of the vehicle when the presence of the vehicle in the vehicle detection area is detected, and releases the regulation when the settlement is completed ;
The vehicle detection unit, wherein the vehicle detection device is built in or externally attached to the car stop device .

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