JP7129697B2 - speedometer inspection system - Google Patents

Description

The present invention relates to a speedometer inspection system for inspecting a speedometer of a vehicle.

The speedometer, which indicates the speed to the driver, has a significant impact on driving safety, so it is an inspection item in car inspections. FIG. 10 shows an example of a conventional inspection apparatus for performing this speedometer inspection. This speedometer inspection device 501 includes a roller device 510 for detecting the actual running speed (actual speed) while the vehicle is running, and a headlight detector for detecting the blinking of the headlights arranged in front of the vehicle. device 575, a driving instruction device 560 that displays driving instructions and test results to the examinee (driver), the actual speed of the roller device 510, and the speedometer pass/fail based on the difference between the speedometer index It has a speedometer test processor 530 that makes the determination.

A specific inspection procedure will be described. The examinee stops the vehicle while the peripheral surface of the tire is in contact with the roller of the roller device 510 . Incidentally, in the roller device 510, when the tire rotates, the roller also rotates, so the actual speed can be measured from the rolling distance of the roller. When the preparations are complete, the driving instruction device 560 instructs the examinee to run the vehicle at 40 km/h. The examinee who received the instruction accelerates the vehicle to 40 km/h while watching the speedometer, and flashes (passes) the headlamp at the same time when the indicated value reaches 40 km/h. This flashing serves as a declaration signal by the examinee and is detected by the headlight detector 575 . The speedometer inspection processor 530 detects the actual speed of the vehicle by means of the roller device 510, triggered by the report signal from the headlight detector 575. FIG. If this actual speed falls within the range of 31.0 km/h to 42.5 km/h, the speedometer test passes. Here, the case where the declaration signal is given by blinking the headlight is exemplified, but there is also a system in which the examinee makes the declaration signal by means of a dedicated button.

In addition, the ``Notification for Detailed Regulations on Safety Standards for Road Transport Vehicles'' stipulates that ``the speedometer indication shall not fall below the speed at which the vehicle is traveling''. Therefore, the indicated value of the speedometer of the vehicle is often designed to always be greater than the actual speed of the vehicle.

Japanese Utility Model Laid-Open No. 59-64359

In the case of the conventional speedometer inspection device 501, the examinee must drive the vehicle so that the indicated value is 40 km/h while visually observing the speedometer, and at that moment, perform the passing operation. There was a problem that the burden of In addition, there is a problem that if the examinee makes a mistake in the timing of the passing operation, the examination must be repeated.

SUMMARY OF THE INVENTION In view of such circumstances, it is an object of the present invention to provide an inspection system capable of inspecting a speedometer of a vehicle with high accuracy while reducing the burden on the examinee.

In order to achieve the above object, the present invention acquires the actual speed of a vehicle (hereinafter referred to as roller vehicle speed information) by a roller device that rotates together with the peripheral surface of a tire of the vehicle, and presents the vehicle speed information to the driver of the vehicle. While the speedometer is indicating the speedometer display speed for inspection, which is the reference value in the inspection rule, the computer determines whether or not the roller vehicle speed information falls within a predetermined range of speedometer acceptance conditions. In the speedometer inspection system, the speedometer inspection processing means is connected to an electronic control unit of the vehicle, and the vehicle speed information output from the electronic control unit (hereinafter referred to as ECU an ECU vehicle speed acquisition unit that acquires vehicle speed information), a roller vehicle speed acquisition unit that is connected to the roller device and acquires the roller vehicle speed information, and when the speedometer displays the inspection speedometer display speed, the Determined speed storage unit for storing the ECU vehicle speed information held by the electronic control unit as inspection ECU vehicle speed information, and whether the ECU vehicle speed information satisfies a timing condition set based on the inspection ECU vehicle speed information. a timing determination unit that determines whether or not the timing condition is satisfied, and generates an inspection start signal; and whether the roller vehicle speed information acquired based on the inspection start signal meets the speedometer acceptance determination condition and a speedometer pass/fail judgment processing unit for judging whether the speedometer is correct or not.

In relation to the above speedometer inspection system, the determined speed storage unit stores a plurality of inspection ECU vehicle speed information corresponding to a plurality of vehicles.

In relation to the speedometer inspection system, the timing determination unit includes, as the timing conditions, a vehicle speed matching condition regarding whether or not the ECU vehicle speed information matches the testing ECU vehicle speed information, and the ECU vehicle speed information is stable. It is characterized in that it is determined whether or not both vehicle speed stability conditions regarding whether or not the vehicle speed is stable are satisfied.

In relation to the speedometer inspection system, the speedometer inspection processing means includes timing determination means realized by a computer and speedometer pass/fail determination means realized by a computer separate from the timing determination device. The timing determination means includes the ECU vehicle speed acquisition section, the determined speed storage section, the timing determination section, and inspection start signal output processing for outputting the inspection start signal to the speedometer pass/fail determination means. The speedometer pass/fail determination means includes an inspection start signal input processing unit to which the inspection start signal transmitted from the inspection start signal output processing unit is input, the roller vehicle speed acquisition unit, and the and a speedometer acceptance/rejection determination processing unit.

In connection with the above speedometer inspection system, there is further provided a headlight detection device that detects blinking of the headlights of the vehicle and generates a declaration signal signal equivalent to the inspection start signal, and A signal path switching device for switching between a state of transmission to the speedometer acceptance/rejection determining means and a state of transmitting the inspection start signal to the speedometer acceptance/rejection determination means.

ADVANTAGE OF THE INVENTION According to this invention, the excellent effect that a highly accurate speedometer test|inspection can be implement|achieved can be produced, while a burden on an examinee is reduced.

1 is a front view showing the overall configuration of a speedometer inspection system according to a first embodiment of the present invention; FIG. It is the graph chart which compared the ECU vehicle speed and the speedometer vehicle speed of the vehicle in the same speedometer inspection system. (A) is a block diagram illustrating display contents of a driving instruction device of the speedometer inspection system, and (B) is a block diagram showing an internal configuration of a computer of a speedometer inspection processor. It is a block diagram showing the function or program configuration of the same speedometer inspection processor. It is a block diagram which shows the data structure of the determination speed preservation|save part of the same speedometer test|inspection processor. FIG. 4 is a graph diagram explaining a timing determination rule by a timing determination processing unit of the same speedometer inspection processor; (A) and (B) are diagrams showing sample configurations of displays presented to an operator in the same speedometer inspection processor. (A) and (B) are front views showing the overall configuration of a speedometer inspection system according to a second embodiment of the present invention. FIG. 4 is a block diagram showing the functions or program configuration of a speedometer testing processor of the speedometer testing system; 1 is a front view showing the overall configuration of a conventional speedometer inspection system; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

<Overall Configuration of First Embodiment>

FIG. 1 shows the overall configuration of a speedometer inspection system (hereinafter referred to as inspection system) 1 of the first embodiment. The inspection system 1 has a roller device 10 , an ECU connection device 20 , a speedometer inspection processor (means) 30 , and an operation instruction device 60 .

The vehicle 80 includes a speedometer 82, an accelerator 83, a light switch 84 for operating a headlight, a vehicle speed sensor (rotational speed sensor) 86 for detecting the rotational speed of a tire 85 (rotating shaft), and a vehicle speed sensor. It has an electronic control unit (ECU) 90 to which the detection signal of 86 is transmitted via a communication line. The speedometer 82, the accelerator 83, the light switch 84, the vehicle speed sensor 86, etc. are all connected to the electronic control unit 90 via communication lines to enable signal transmission. Although the type of communication line does not matter, for example, a communication line complying with CAN (Controller Area Network) standards is used.

<Roller device>

The roller device 10 rolls in contact with the peripheral surface of the tire 85 and rotates together with the tire 85. The roller device 10 calculates the actual running speed of the vehicle 80 (hereinafter referred to as roller vehicle speed information) based on the rolling distance of the peripheral surface of the roller 12. It has a vehicle speed calculation device (not shown) that calculates the vehicle speed. Therefore, the roller device 10 can output roller vehicle speed information. Note that this vehicle speed calculation device may be incorporated as part of the functions of the speedometer inspection processor 30, which will be described later.

<ECU connection device>

The ECU connection device 20 is a type of scan tool (scan unit) realized by a computer, is connected to an OBD (On-board diagnostics) terminal of the electronic control unit 90, communicates with the microcomputer of the electronic control unit 90, Live data of vehicle speed information (hereinafter referred to as ECU vehicle speed information) transmitted from various sensors to the electronic control unit 90 is acquired in real time. OBD means that when an abnormality occurs in various sensors (including the vehicle speed sensor 86), actuators, equipment, engine, etc. of the vehicle 80, the abnormality data is stored in a memory, and a warning lamp is turned on. It is a vehicle self-diagnostic function that informs the driver of the occurrence of an abnormality. The OBD terminal of the electronic control unit 90 is a terminal capable of inputting and outputting all kinds of information that can be used by the OBD in real time. For example, a connection connector called DLC (Data link coupler) is prepared. In addition, although the case where the ECU connection device 20 acquires at least ECU vehicle speed information from the electronic control unit 90 was illustrated here, you may acquire information other than a vehicle speed together. Further, the ECU connection device 20 may be integrated with a speedometer inspection processor 30, which will be described later.

<Electronic control unit>

An electronic control unit 90 of the vehicle 80 electronically controls the speedometer 82 . In this case, the electronic control unit 90 displays vehicle speed information on the speedometer 82 based on vehicle speed information (hereinafter referred to as ECU vehicle speed information) obtained from a pulse signal or the like from the vehicle speed sensor 86 (or calculated from the pulse signal). (hereinafter referred to as speedometer vehicle speed information), and transmits the speedometer vehicle speed information to the speedometer 82 via a communication line. The speedometer 82 that has received the speedometer vehicle speed information displays this speed as it is. As shown in FIG. 2, the speedometer vehicle speed information calculated by the electronic control unit 90 is corrected and calculated so as to always have a larger value than the ECU vehicle speed information. FIG. 2 shows the reference output of the electronic control unit 90 when the vehicle 80 is accelerated from 30 km/h to 36 km/h based on the ECU vehicle speed information for about 10 seconds. In other words, the ECU vehicle speed information always has a smaller value than the speedometer 82 indication. With this amendment, the guideline of "The speedometer indication shall not be lower than the speed when the car is running" in the "Notification for Detailed Regulations on Safety Standards for Road Transport Vehicles" in Japan. Fulfill. The amount of correction (the amount of addition of the speedometer vehicle speed information to the ECU vehicle speed information) varies depending on the value of the ECU vehicle speed information. Specifically, it is often set such that the correction amount is small at low speeds, but increases as the speed increases, taking safety into consideration. In addition, this correction amount often differs depending on the type of vehicle and the manufacturer of the vehicle. According to the findings of the present inventors, the correction amount is often set to approximately 4 km/h (3 km/h to 5 km/h) when traveling at 40 km/h.

<Driving instruction device>

The driving instruction device 60 is a display and a sounding device arranged within the field of view of the examinee (driver) of the vehicle 80, and provides the examinee with information about driving by means of characters, image information, voice information, etc. on the display. give instructions. For example, in the case of the display, as shown in FIG. 3A, "Please start running at 40 km/h" (start instruction 210) at the start of the inspection, and "Please increase the speed" (acceleration instruction 212), "Please increase the speed a little" when the speed is slightly insufficient (weak acceleration instruction 214), and "Keep the speed (Constant speed instruction 216), "Slow down a little" when the speed is a little too fast (Slight deceleration instruction 218), and "Slow down" when the speed is too fast (Deceleration instruction 220). ), "speedometer pass" (pass display 222), "speedometer fail" (fail display 224), "please stop" at the end of inspection (end instruction 224), and the like. The display switching control of the driving instruction device 60 is performed by the speedometer inspection processor 30, which will be described later.

<Speedometer inspection processor (means)>

The speedometer inspection processor 30 is a so-called computer, and is connected to the roller device 10, the ECU connection device 20, and the driving instruction device 60 via communication lines. As shown in FIG. 3B, the speedometer inspection processor 30 is composed of a storage device such as a CPU, a RAM, a ROM and a hard disk, a power supply device, an input interface, an output interface, and a bus wire connecting them. . The CPU is a central processing unit that executes inspection programs and implements various functions. The RAM is used as a work area and storage area for the CPU, and the ROM and storage device store the operating system and programs executed by the CPU. Various data are also stored in the storage device. Note that the speedometer inspection processor 30 may be composed of a computer such as a microcomputer.

FIG. 4 shows a functional configuration realized by executing the inspection processing program in the speedometer inspection processor 30. As shown in FIG. This functional configuration includes a roller vehicle speed acquisition unit 310, an ECU vehicle speed acquisition unit 315, a timing determination unit 322, a determination rule storage unit 324, a determination speed storage unit 326, a speedometer pass/fail determination processing unit 332, and a pass/fail condition storage unit. 334 and a driving instruction processing unit 340 . A meter display test processing unit 350 and a meter imaging processing unit 355 are provided as options.

The roller vehicle speed acquisition unit 310 acquires roller vehicle speed information from the roller device 10 in real time. The ECU vehicle speed acquisition unit 315 acquires ECU vehicle speed information from the electronic control unit 90 via the ECU connection device 20 in real time.

The timing determination unit 322, the determination rule storage unit 324, and the determination speed storage unit 326 determine whether or not the ECU vehicle speed information satisfies a predetermined timing condition (virtual declaration signal condition). Generate a start signal. The predetermined timing condition (virtual declaration signal condition) means that "the speedometer 82 currently indicates the inspection speedometer display speed (in this embodiment, the vehicle inspection target value of 40 km/h). If there was, the examinee (driver) would have been passing." means the condition.

Specifically, the determined speed storage unit 326 is stored by the electronic control unit 90 when the speedometer 82 indicates the inspection speedometer display speed (in this embodiment, 40 km/h, which is the vehicle inspection rule). The ECU vehicle speed information stored in the vehicle is saved as "inspection ECU vehicle speed information". In other words, the determined speed storage unit 326 stores the ECU vehicle speed information when the electronic control unit 90 causes the speedometer 82 to display 40 km/h based on the signal from the vehicle speed sensor 86 as "inspection ECU vehicle speed information". Since this "inspection ECU vehicle speed information" differs depending on the vehicle type (model), vehicle manufacturer, etc., as shown in FIG. preferably.

Incidentally, as the "inspection ECU vehicle speed information" pre-registered in the determined speed storage unit 326, the information disclosed by the automobile manufacturer (the correction value described above) may be used as it is. In addition, this inspection system 1 or a device similar thereto is applied to a reference vehicle 80 (a vehicle that has undergone speedometer inspection or a new vehicle), and the vehicle 80 is inspected while the speedometer 82 is 40 km/h. By reading the ECU vehicle speed information from the electronic control unit 90 while the vehicle is running, the value may be adopted as the "inspection ECU vehicle speed information".

The determination rule storage unit 324 stores information (including calculation formulas) regarding determination rules (determination conditions) for timing determination. This determination rule may include, for example, the following determination rules (A) to (C).
(A): As shown in FIG. 6, assuming that the ECU vehicle speed information monitored by the ECU vehicle speed acquisition unit 315 while the vehicle 80 is running increases (accelerates) step by step, the ECU vehicle speed is The moment when it coincides with the inspection ECU vehicle speed information DE is determined, and the "inspection start signal" is generated at the timing T1.
(B): Determine the moment when the ECU vehicle speed information to be monitored is maintained in agreement with the inspection ECU vehicle speed information DE for a predetermined time U (seconds), and at that timing T2, the "inspection start signal" is sent. Generate.
(C): Determine the moment when the monitored ECU vehicle speed information matches the inspecting ECU vehicle speed information DE and the average acceleration K within the most recent predetermined time L (seconds) becomes equal to or less than a predetermined threshold value. , and generates an "inspection start signal" at the timing T3.

Note that the determination rule (A) is a determination method that uses only whether or not the ECU vehicle speed matches the inspection ECU vehicle speed information DE (vehicle speed matching condition), and the determination rules (B) and (C) are: Whether or not the speed of the vehicle is stable (vehicle speed stability condition) is added to the vehicle speed matching condition. The roller 12 of the roller device 10 may have poor output responsiveness to the roller vehicle speed information due to tire slippage during acceleration and deceleration. In such a case, it is preferable to add a vehicle speed stability condition as in determination rules (B) and (C). Here, determination rules (A) to (C) are exemplified, but other determination methods may be used.

The timing determination unit 322 stores the "inspection ECU vehicle speed information DE" referenced from the determination speed storage unit 326 based on the vehicle name, model, manufacturer, etc. of the vehicle 80 and the determination rule stored in the determination rule storage unit 324. By referring to it, it is determined whether or not the ECU vehicle speed information satisfies the timing condition set based on the inspection ECU output speed information, and if the timing condition is satisfied, an inspection start signal is generated. When the timing determination unit 322 generates the inspection start signal, the speedometer pass/fail judgment processing unit 332 and pass/fail condition storage unit 334 are activated.

The speedometer pass/fail determination processing unit 332 acquires roller vehicle speed information using the inspection start signal as a trigger, and determines whether or not this roller vehicle speed information satisfies the speedometer pass/fail determination conditions. The pass/fail condition storage unit 334 accumulates information defining speedometer pass/fail judgment conditions. In this embodiment, the information that "the roller vehicle speed information is 31.0 km/h or more and 42.5 km/h or less" is accumulated as a pass/fail condition. When the speedometer pass judgment rule is changed due to a revision of the speedometer inspection rule, the information stored in the pass/fail condition storage unit 334 may be updated. The speedometer pass/fail determination processing unit 332 generates “pass information” when the speedometer is determined to be acceptable, and generates “failure information” when the speedometer is determined to be unsuccessful. These information can be displayed on the screen to the operator as needed.

The driving instruction processing unit 340 controls the driving instruction device 60 during the examination to present various information to the examinee (driver). The display contents are as shown in FIG. It is preferable to compare the ECU vehicle speed and the inspection ECU vehicle speed in real time and switch the display content based on the relative difference.

FIG. 7A shows a sample of the display prepared for the operator to explain the switching timing of the display by the driving instruction processing unit 340. FIG. At the examination start time S, a "start instruction" is presented. After the start, an "acceleration instruction" is issued in a region P where the ECU vehicle speed is too low and the difference in the inspection ECU vehicle speed information DE is large. In a region Q where the ECU vehicle speed is small but the difference in the inspection ECU vehicle speed information DE is small, a "weak acceleration instruction" is issued. In a region R where the examinee's accelerator operation is too large and the ECU vehicle speed exceeds the inspection ECU vehicle speed information DE, a "deceleration instruction" or "light deceleration instruction" is issued according to the difference. In a region W where the ECU vehicle speed coincides with the inspection ECU vehicle speed information DE, a "constant speed instruction" is issued and the determination of the timing T is awaited. When the timing T is determined, a pass/fail decision is made based on the roller vehicle speed. When the inspection is completed, issue a "end instruction". After completion of the inspection, the driving instruction processing unit 340 presents the "acceptance display" or "failure display" to the examinee (driver). The display on the operator side displays the timing T, the ECU vehicle speed and the roller vehicle speed at that time, and the pass/fail judgment result. Note that FIG. 7B illustrates a case where the examinee accelerates smoothly, and in such a case, no deceleration instruction is presented to the driving instruction device 60 .

<Speedometer inspection procedure>

Next, a speedometer inspection procedure using the inspection system 1 will be described. First, the operator selects corresponding inspection ECU vehicle speed information from the determined speed storage unit 326 shown in FIG. The vehicle inspection certificate may have computer-readable identification information, such as a QR code (registered trademark). This identification information holds vehicle inspection information such as the model of the vehicle 80 . Therefore, in the inspection system 1 , the identification information may be read by a reader to automatically determine the model of the vehicle 80 and the ECU vehicle speed information for inspection may be automatically selected from the determined speed storage section 326 .
Next, the examinee (driver) moves the vehicle 80 onto the roller device 10 and waits. The driving instruction processing unit 340 of the speedometer test processor 30 instructs the examinee to start driving through the driving instruction device 60 . While looking at the speedometer 82, the examinee drives the vehicle 80 with a target speed of 40 km/h. be. The examinee accelerates or decelerates the vehicle 80 accordingly.

During this time, the speedometer inspection processor 30 monitors the ECU vehicle speed in real time by the ECU vehicle speed acquisition unit 315, and determines whether or not the ECU vehicle speed information matches the ECU vehicle speed information for inspection by the timing determination processing unit 320. do. In other words, the speedometer inspection processor 30 automatically determines the timing T at which the speedometer 82 would indicate 40 km/h, which is the speedometer display speed for inspection, and the inspection start signal (pseudo declaration). cue signal).

Triggered by the inspection start signal, the speedometer pass/fail determination processing unit 332 acquires the roller vehicle speed by the roller vehicle speed acquisition unit 310, and determines the pass/fail condition “31.0 km/h or more and 42.5 km/h or less”. , and terminate the inspection.

As described above, according to the inspection system 1 of the present embodiment, the examinee simply causes the vehicle 80 to run on the roller device 10, and the speedometer inspection processor 30 monitors the ECU vehicle speed in real time via the ECU connection device 20. Then, when the ECU vehicle speed satisfies a timing condition set based on the ECU vehicle speed information for inspection, an inspection start signal is automatically generated. As a result, the examinee does not need to perform the passing operation accurately at the moment when the speed reaches 40 km/h while looking at the speedometer 82, and the burden is greatly reduced. Furthermore, since the conventional problem of shifting the timing of the passing operation by the examinee is eliminated, it is possible to avoid deterioration of examination accuracy due to this.

In addition, in the inspection system 1, the determined speed storage unit 326 holds a plurality of inspection ECU vehicle speed information corresponding to the vehicle type (type) of the vehicle 80, etc. Therefore, various kinds of vehicles 80 can be A test of the speedometer 82 can be performed for

Furthermore, in the present inspection system 1, the timing determination unit 322 determines whether or not the ECU vehicle speed matches the ECU vehicle speed information for inspection (vehicle speed match condition), and whether or not the vehicle speed is stable (vehicle speed stability condition). ) may be determined before the inspection start signal is generated. Therefore, it is possible to improve the accuracy of the roller vehicle speed information obtained from the roller device 10, which is susceptible to tire slippage due to acceleration and deceleration, so that inspection accuracy can be enhanced.

<Optional functions>

Next, optional functions in the inspection system 1 will be described. The speedometer test processor 30 preferably includes a meter display test processor 350 . This meter display test processing section 350 has a function of confirming whether or not the speedometer 82 is functioning in the first place. Specifically, the meter display test processing section 350 cooperates with the active test program incorporated in the electronic control unit 90 to transmit an operation diagnosis command for the speedometer 82 to the electronic control unit 90 and perform a desired operation. Information (for example, 125 km/h) is forced to be displayed on the speedometer 82 . If it is displayed on the speedometer 82 according to the command, basic function pass information is generated which means that the basic function has passed, and if it is not displayed, basic function fail information is generated which means that the basic function has failed. . Only when both this basic function pass information and the speedometer pass information in the speedometer pass/fail judgment processing section 332 are generated, it is preferable to judge the final pass of the speedometer 82 . If the meter display test processing unit 350 is not integrally incorporated into the inspection system 1 and the basic functions are checked in a separate process, only the basic function pass information/failure information is used in the speedometer inspection process. may be input to the device 30 to determine final acceptance.

The speedometer test processor 30 preferably includes a meter imaging processor 355 . As shown in FIG. 1, the meter imaging processing unit 355 controls an imaging device (camera or video camera) 70 fixed to the front of the speedometer 82 to change the display state of the speedometer 82 into a still image or a moving image. and store the still image or moving image data as evidence. It should be noted that this imaging timing is assumed to be when the timing determination unit 322 generates an examination start signal. As a result, it is possible to leave as evidence the display mode of the speedometer 82 at the moment when the speedometer pass/fail judgment is made by the speedometer pass/fail judgment processing unit 332, and it is possible to verify the inspection results after the fact. Become.

<Overall Configuration of Second Embodiment>

Next, a speedometer inspection system 401 according to a second embodiment will be described with reference to FIG. 8(A). Here, only the configuration different from the first embodiment will be described, and the same or similar components or functions will be omitted by matching the last two digits of the symbols with those of the first embodiment.

The inspection system 401 includes, as a component thereof, a conventional speedometer inspection device installed at an existing vehicle inspection site. That is, by combining conventional equipment and new equipment, the same inspection as that of the inspection system 1 of the first embodiment is realized.

Specifically, this inspection system 401 includes, as part of its components, a roller device 510 used in a conventional speedometer inspection, and a headlight detector arranged in front of the vehicle to detect blinking of headlights. 575, a second driving instruction device (conventional driving instruction device) 560 that gives driving instructions to the examinee (driver), the actual speed of the roller device 510, and the speed based on the difference between the speedometer indication It has a speedometer acceptance/rejection determination device 530 for determining acceptance/rejection of the meter.

The inspection system 401 has an ECU connection device 620 , a first operation instruction device 660 , a timing determination device 700 , and a signal path switching device 900 in addition to the conventional configuration described above. The timing determining device 700 and the conventional speedometer pass/fail judging device 530 are implemented by computers separate from each other. A speedometer inspection processor (means) 630 having the equivalent function is realized.

FIG. 9 shows the configurations of the timing determination device (timing determination means) 700 and the conventional speedometer acceptance/rejection determination device (speedometer acceptance/rejection determination means) 530 in the speedometer inspection processor 630 .

The timing determination device 700 includes an ECU vehicle speed acquisition unit 715, a timing determination unit 722, a determination rule storage unit 724, a determination speed storage unit 726, a driving instruction processing unit 740, an inspection start signal conversion processing unit 750, and an inspection start signal output process. It has a part 760 .

The driving instruction processing unit 740 controls the first driving instruction device 660 to issue driving instructions to the examinee in the same manner as shown in FIG. 3(A). However, in the second embodiment, the pass/fail judgment result of the speedometer cannot be obtained on the timing determination device 700 side, so the pass/fail judgment result of the speedometer is not displayed on the first driving instruction device 660 . Instead, a pass/fail result is displayed on the conventional second driving instruction device 560 .

The test start signal conversion processing unit 750 converts the test start signal generated by the timing determination unit 722 in accordance with the communication protocol and input format (for example, digital signal/analog signal) of the conventional speedometer pass/fail determination device 530 . Even if the communication specifications and input/output specifications are different due to the difference between the computer of the timing determination device 700 and the computer of the speedometer acceptance/rejection determination device 530, it can be flexibly handled. Note that the examination start signal conversion processing unit 750 may be processed as a software function, but as shown in FIG. 8, by combining hardware, for example, a digital signal may be converted into an analog signal. .

The inspection start signal output processing unit 760 outputs the inspection start signal (virtual declaration signal signal) converted by the inspection start signal conversion processing unit 750 to the speedometer pass/fail determination device 530 via the signal path switching device 900. do.

The conventional speedometer acceptance/rejection determination device 530 includes a roller vehicle speed acquisition unit 810 , a speedometer acceptance/rejection determination processing unit 832 , an acceptance condition storage unit 834 , and an inspection start signal input processing unit 880 . The inspection start signal input processing unit 880 receives the inspection start signal (virtual declaration signal signal) transmitted from the timing determination device 700 via the signal path switching device 900 and passes it to the speedometer pass/fail judgment processing unit 832 .

The speedometer acceptance/rejection determination processing unit 832 recognizes this inspection start signal as being the same as the declaration signal signal transmitted from the conventional headlight detector 575, and uses this as a trigger to obtain the signal from the roller vehicle speed acquisition unit 810. By referring to the obtained roller vehicle speed, the pass/fail judgment of the speedometer is performed. The result is communicated to the driver by the second driving instruction device 560 .

As a result, according to the inspection system 401 of the second embodiment, it is possible to obtain exactly the same result as the inspection system of the first embodiment.

FIG. 8B shows a state in which the signal path is switched by the signal path switching device 900 to implement the conventional speedometer inspection method. A path indicated by a dotted line means a path where communication is cut off by the signal path switching device 900 . The signal path switching device 900 blocks the inspection start signal transmitted from the timing determination device 700 and inputs the report signal transmitted from the headlight detector 575 to the speedometer pass/fail determination device 530 . In this case, while the vehicle 80 is running at 40 km/h, the examinee operates the light switch 84 to flash the headlights (passing), and the headlight detector 575 detects it. A declaration cue signal can be generated.

For example, if the vehicle 80 to be inspected is old and does not have the electronic control unit 90, the timing determination device 700 cannot function, but it is possible to easily switch to the conventional speedometer inspection method. becomes.

It should be noted that the inspection system of the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

1,401 speedometer inspection system 10 roller device 20 ECU vehicle speed acquisition device 30 speedometer inspection processor 60 driving instruction device 80 vehicle 82 speedometer 83 accelerator 84 light switch 85 tire 86 vehicle speed sensor 90 electronic control unit (ECU)

Claims (5)

A speedometer that acquires the actual speed of the vehicle (hereinafter referred to as roller vehicle speed information) by a roller device that rotates in contact with the peripheral surface of the vehicle tire and presents the vehicle speed information to the driver of the vehicle is the standard value in the inspection rule. While displaying the speedometer display speed for inspection, whether or not the roller vehicle speed information falls within a range of predetermined speedometer acceptance conditions is determined by a speedometer inspection processing means realized by a computer. A speedometer inspection system comprising:
The speedometer inspection processing means includes:
an ECU vehicle speed acquisition unit connected to an electronic control unit of the vehicle and acquiring vehicle speed information (hereinafter referred to as ECU vehicle speed information) output from the electronic control unit;
a roller vehicle speed acquiring unit connected to the roller device and acquiring the roller vehicle speed information;
a determination speed storage unit that stores the ECU vehicle speed information held by the electronic control unit when the speedometer displays the inspection speedometer display speed as inspection ECU vehicle speed information;
a timing determination unit that determines whether or not the ECU vehicle speed information satisfies a timing condition set based on the inspection ECU vehicle speed information, and generates an inspection start signal if the timing condition is satisfied;
a speedometer pass/fail determination processing unit that determines whether the roller vehicle speed information acquired based on the inspection start signal satisfies the speedometer pass/fail determination condition;
A speedometer inspection system comprising: A plurality of the inspection ECU vehicle speed information are stored in the determined speed storage unit corresponding to a plurality of the vehicles,
2. The speedometer testing system of claim 1. The timing determination unit includes, as the timing conditions, a vehicle speed matching condition regarding whether or not the ECU vehicle speed information matches the inspection ECU vehicle speed information, and a vehicle speed stability condition regarding whether or not the ECU vehicle speed information is stable. Characterized by determining whether both are satisfied,
3. A speedometer inspection system according to claim 1 or 2. The speedometer inspection processing means includes:
timing determination means implemented by a computer;
a speedometer pass/fail determination means realized by a computer separate from the timing determination means;
The timing determination means includes the ECU vehicle speed acquisition section, the determined speed storage section, the timing determination section, and an inspection start signal output processing section that outputs the inspection start signal to the speedometer pass/fail determination means. has
The speedometer acceptance/rejection determination means includes an inspection start signal input processing unit to which the inspection start signal transmitted from the inspection start signal output processing unit is input, the roller vehicle speed acquisition unit, and the speedometer acceptance/rejection determination processing unit. characterized by having
A speedometer inspection system according to any one of claims 1 to 3. Furthermore, a headlight detection device that detects blinking of the headlights of the vehicle and generates a declaration signal signal equivalent to the inspection start signal;
A signal path switching device for switching between a state of transmitting the declaration signal to the speedometer pass/fail determination means and a state of transmitting the inspection start signal to the speedometer pass/fail determination means,
5. The speedometer testing system of claim 4.

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