JP6201399B2 - Detection program, detection apparatus, detection system, and detection method - Google Patents

Description

  The present invention relates to a detection program, a detection apparatus, a detection system, and a detection method.

  Conventionally, a technique for irradiating electromagnetic waves such as millimeter waves into a railroad crossing, receiving a reflected wave of the irradiated electromagnetic waves, and detecting a person or a car that has entered the railroad crossing has been proposed (for example, Patent Document 1, Patent Document 1). 2).

JP 2005-233615 A JP 2001-270442 A

  However, in the conventional technology, when a flying object such as a plastic bag blown by a bird or wind flies into the railroad crossing, the flying object is erroneously detected as an object that has entered the railroad crossing, and a false alarm is output to the train etc. Resulting in.

  In one aspect, the present invention aims to reduce false alarms caused by flying objects.

According to one aspect, the detection program includes a transmission unit that irradiates an electromagnetic wave in a range including a predetermined region, and a plurality of reflection units that reflect the electromagnetic wave and are disposed on the opposite side of the transmission unit across the predetermined region. From the sensor having the receiving unit that receives the reflected wave by the receiving unit, the receiving unit receives the reflection information indicating the continuity of the reflected wave from each reflecting unit received by the receiving unit in time series, and from each reflecting unit included in the received reflection information The first pattern indicating the time series of the cut off of the reflected wave, the first reflecting unit and the second reflecting unit of the plurality of reflecting units, the path of the reflected wave is located on the outermost side in the direction in which the passing object passes through the region The blocking of the reflected wave from the reflecting part and the third reflecting part in which the reflected wave path is located between the reflected wave path from the first reflecting part and the reflected wave path from the second reflecting part. It shows the time series of, compared to the second pattern set in advance It is determined whether the object that blocked the reflected wave from each reflector is a passing object that passes through the area or a flying object that jumps into the area, and the object that blocked the reflected wave is determined as a passing object. Output the result to the outside, and let the computer execute the process.

According to another aspect, the detection device includes a transmission unit that irradiates an electromagnetic wave in a range including a predetermined region, and a plurality of reflection units that are disposed on the opposite side of the transmission unit across the predetermined region. A receiving unit that receives the reflected information from each of the reflecting units received by the receiving unit from a sensor having a receiving unit that receives the reflected waves by the receiving unit, and each reflection included in the received reflecting information A first pattern showing a time series of blocking of reflected waves from the first portion, a first reflecting portion in which the path of the reflected wave is located on the outermost side in the direction in which the passing object passes through the region, among the plurality of reflecting portions; Reflection from the second reflection unit and the third reflection unit in which the reflection wave path is located between the reflection wave path from the first reflection unit and the reflection wave path from the second reflection unit It shows the time series of cutoff wave, the second pattern and the ratio set in advance Thus, a determination unit that determines whether an object that blocks a reflected wave from each reflecting unit passes through the area or a flying object that jumps into the area, and an object that blocks the reflected wave is determined as a passing object. An output unit that outputs the determination result to the outside.

According to still another aspect, the detection system includes a transmission unit that irradiates an electromagnetic wave to a range including a predetermined region, and a plurality of reflections that are disposed on the opposite side of the transmission unit across the predetermined region. A sensor having a receiving unit that receives the reflected wave from the unit, and reflection information that indicates the continuity of the reflected wave from each reflecting unit received by the receiving unit in time series, and from each reflecting unit included in the received reflection information The first pattern indicating the time series of blocking the reflected wave of the first reflection part and the second reflection part of the plurality of reflection parts, the path of the reflected wave is located on the outermost side in the direction in which the passing object passes through the region. Of the reflected wave from the reflection part of the first reflection part and the third reflection part where the reflected wave path is located between the reflected wave path from the first reflection part and the reflected wave path from the second reflection part. It shows the time series of blocking, compared with the second pattern set in advance Thus, a determination unit that determines whether an object that blocks the reflected wave from each reflection unit is a passing object that passes through the region or a flying object that jumps into the region, and an object that blocks the reflected wave is determined as a passing object. An output unit that outputs the determination result to the outside.

According to still another aspect, a detection method includes: a transmission unit that irradiates an electromagnetic wave in a range including a predetermined region; and a plurality of reflections that are disposed on the opposite side of the transmission unit across the predetermined region. From the sensor having a receiving unit that receives the reflected wave from the receiving unit, the reflection information received in the time series of the reflected wave from each reflecting unit received by the receiving unit is received, and from each reflecting unit included in the received reflection information The first pattern indicating the time series of blocking the reflected wave of the first reflection part and the second reflection part of the plurality of reflection parts, the path of the reflected wave is located on the outermost side in the direction in which the passing object passes through the region. Of the reflected wave from the reflection part of the first reflection part and the third reflection part where the reflected wave path is located between the reflected wave path from the first reflection part and the reflected wave path from the second reflection part. It shows the time series of blocking, be compared with a second pattern set in advance Therefore, it is determined whether the object that blocked the reflected wave from each reflecting part is a passing object that passes through the area or a flying object that flies to the area. Is output to the outside.

  False alarms caused by flying objects can be reduced.

It is a figure which shows one Embodiment of a detection system and a detection apparatus. It is a figure which shows the example of the detection process in the detection system shown in FIG. It is a figure which shows another embodiment of a detection system and a detection apparatus. It is a figure which shows the example of intensity distribution of the reflected wave which the sensor shown in FIG. 3 calculates. It is a figure which shows the example of the log data shown in FIG. It is a figure which shows the example of the log data shown in FIG. It is a figure which shows the example of the detection process in the detection system shown in FIG. It is an overhead view which shows another embodiment of a detection system and a detection apparatus. It is a top view of FIG. It is a figure which shows the example of the sensor shown in FIG. 8 and FIG. It is a figure which shows the example of the detection apparatus shown in FIG. 8 and FIG. It is a figure which shows the example of the log data shown in FIG. It is a figure which shows the example of the detection process in the detection system shown to FIG. 8 and FIG. It is a figure which shows the example of the hardware constitutions of a detection system and a detection apparatus.

  Embodiments will be described below with reference to the drawings.

  FIG. 1 shows an embodiment of a detection system and a detection device.

  A detection system 100 illustrated in FIG. 1 includes a sensor 1, a reflection unit 2 (2 a, 2 b, 2 c), and a detection device 3. The detection system 100 detects a passing object 5 such as a person or a car that passes in a direction 5a through a predetermined area 4 indicated by a rectangle. Further, the detection system 100 detects a flying object 6 such as a bird or a plastic bag flying to the region 4. For example, when the region 4 is a railroad crossing, the detection system 100 desirably shows that an object existing in the region 4 shows different behavior depending on whether the passing object 5 or the flying object 6 is present when the railroad crossing is closed. . Therefore, an operation in which the detection system 100 distinguishes the passing object 5 and the flying object 6 will be described. In addition, although the area | region 4 shown in FIG. 1 has a rectangular shape, you may have arbitrary shapes.

  The sensor 1 includes, for example, a transmission unit 1a that irradiates an electromagnetic wave in a range 7 including the region 4, and a reception unit 1b that receives a reflected wave from each reflection unit 2 of the irradiated electromagnetic wave. The sensor 1 outputs, for example, reflection information including information indicating the continuity of reflected waves from each reflection unit 2 received by the reception unit 1b in time series to the detection device 3. In addition, the receiving unit 1 b of the sensor 1 receives the reflected wave from the passing object 5 and the flying object 6 together with the reflected wave from each reflecting unit 2. The sensor 1 outputs, to the detection device 3, information that indicates the continuity of reflected waves from the passing object 5 and the flying object 6 received by the receiving unit 1 b in time series.

  Each reflection part 2a, 2b, 2c is arrange | positioned on the opposite side to the sensor 1 on both sides of the area | region 4, for example. The optical path 8 (8a, 8b, 8c) of the reflected wave connecting the sensor 1 and the reflecting portions 2a, 2b, 2c intersects the direction in which the object 5 passes through the region 4. Therefore, when the object 5 passes through the region 4 in the direction 5a, the object 5 blocks the reflected wave in the order of the optical paths 8a, 8b, 8c, and when passing in the direction opposite to the direction 5a, the optical path 8c, 8b, The reflected wave is blocked in the order of 8a.

  The detection device 3 includes a reception unit 3a, a determination unit 3b, and an output unit 3c. The accepting unit 3 a accepts the reflection information output from the sensor 1. The determination unit 3b determines whether the object in the region 4 is the passing object 5 or the flying object 6 based on the received reflection information. The output unit 3 c outputs the determination result to an external computer or the like when it is determined that the object in the region 4 is the passing object 5. Note that the determination unit 3b may be realized by a processor included in a computer or the like executing a detection program and the computer or the like operating as the detection device 3, for example. Further, although the reception unit 3a receives the reflection information output from the sensor 1, the determination unit 3b may receive the reflection information output from the sensor 1.

  By the way, it is difficult for the passing material 5 to pass through the region 4 without crossing the optical path 8a or the optical path 8c, for example. That is, the passing object 5 blocks the reflected wave from the reflecting part 2 a or the reflecting part 2 c and passes through the region 4. Therefore, when the passing object 5 passes through the region 4, it is a reference pattern of the passing object 5 in which the blocking of the reflected wave from the reflecting part 2b appears after the blocking of the reflected wave from the reflecting part 2a or the reflecting part 2c. A reflected wave from each reflector 2 is observed. On the other hand, the flying object 6 may fly on the optical path 8b in the region 4, and in this case, the reflected wave from the reflecting part 2b is blocked without blocking the reflected wave from the reflecting part 2a or the reflecting part 2c. That is, when the flying object 6 flies to the region 4, the blocking of the reflected wave from the reflecting part 2b appears first without blocking the reflected wave from the reflecting part 2a or the reflecting part 2c. A reflected wave from each reflecting portion 2 is observed in the reference pattern. The reference pattern of the passing object 5 and the flying object 6 is an example of a second pattern indicating a time series that can be set in advance from the assumed behavior of the passing object 5 and the flying object 6.

  Therefore, the determination unit 3b acquires a first pattern indicating a time series of blocking of the reflected wave from each reflection unit 2 by an object that has entered the region 4 from the reflection information received from the sensor 1. For example, the determination unit 3b compares the acquired first pattern with the reference pattern of the passing object 5 or the flying object 6 so that the object that blocks the reflected wave from each reflecting unit 2 becomes the passing object 5 and the flying object. 6 is determined.

  FIG. 2 shows an example of detection processing in the detection system 100 shown in FIG. Steps S10, S11, and S12 indicate the operation of the determination unit 3, and steps S20, S21, and S22 indicate the operation of the sensor 1. Steps S10, S11, and S12 in FIG. 2 show examples of detection programs and detection methods.

  In step S <b> 20, the transmission unit 1 a of the sensor 1 irradiates the range 7 with electromagnetic waves.

  In step S21, the receiving unit 1b of the sensor 1 receives the reflected waves from the reflecting units 2a, 2b, and 2c.

  In step S <b> 22, the sensor 1 outputs reflection information including information indicating the continuity of the received reflected wave from each reflection unit 2 in time series to the detection device 3.

  In step S10, the reception unit 3a receives reflection information.

  In step S <b> 11, the determination unit 3 b obtains a first pattern indicating a time series in which blocking of a reflected wave by an object that has entered the region 4 is observed from the reflection information received from the sensor 1. The determination unit 3b compares the acquired first pattern with the reference pattern of the passing object 5 or the flying object 6, so that the object that blocks the reflected wave from each reflecting unit 2 is the passing object 5 or the flying object 6. It is determined which one. For example, the determination unit 3b compares the acquired first pattern with the reference pattern of the passing object 5, and if the first pattern matches the reference pattern of the passing object 5, the reflected wave from each reflecting unit 2 is detected. The obstructed object is determined as the passing object 5. On the other hand, when the acquired first pattern is different from the reference pattern of the passing object 5, the determining unit 3 b determines that the object that blocks the reflected wave from each reflecting unit 2 is the flying object 6.

  Or the determination part 3b compares the acquired 1st pattern with the reference pattern of the flying object 6, for example, and when the 1st pattern and the reference pattern of the flying object 6 correspond, it reflects from each reflection part 2. The object that blocks the wave is determined as the flying object 6. On the other hand, when the acquired first pattern is different from the reference pattern of the flying object 6, the determining unit 3 b determines that the object that blocks the reflected wave from each reflecting unit 2 is the passing object 5.

  In step S <b> 12, the output unit 3 c displays the determination result that the passing object 5 has entered the region 4 when the object that blocks the reflected wave from each reflecting unit 2 is determined by the determining unit 3 b. Output to.

  As described above, in this embodiment, the determination unit 3 b determines whether the object that has blocked the reflected wave of each reflection unit 2 is the passing object 5 or the flying object 6 based on the reflection information received from the sensor 1. . The output unit 3 c outputs a determination result indicating that the passing material 5 has entered the area 4 when the determining unit 3 b determines that the passing material 5 has entered. On the other hand, the output unit 3c is, for example, a computer of a management center that manages the operation of a train or train when the region 4 is a railroad crossing and the determination unit 3b determines that the flying object 6 does not interfere with the operation of the train. For example, the output of an alarm that an object has entered the railroad crossing is postponed. That is, since the detection system 100 can distinguish and detect the passing object 5 and the flying object 6 in the region 4 corresponding to the railroad crossing or the like, the false alarm caused by the flying object 6 can be reduced as compared with the conventional system. it can.

  In this embodiment, three reflection parts 2a, 2b, and 2c are arranged, but two or more reflection parts 2 may be arranged. Increasing the number of reflection parts 2, that is, the number of optical paths 8, increases the probability of detecting an object that blocks the reflected wave, and accuracy in determining whether the object that blocked the reflected wave is a passing object 5 or a flying object 6. Also gets better.

  FIG. 3 shows another embodiment of the detection system and the detection apparatus.

  A detection system 200 shown in FIG. 3 includes a sensor 10, a reflector 20 (20 a, 20 b, 20 c) and a detection device 30. A rectangular predetermined region 40 having vertices A, B, C, and D is a region where the detection system 200 performs object detection processing. The region 40 is, for example, a railroad crossing where a track of a train intersects with a road. The railroad is laid in a direction parallel to the side AB and the side DC of the region 40. It is laid in a direction parallel to the side AD. In the actual detection system 200, the sensor 10 and the detection device 30 are disposed outside the track. The detection system 200 detects a passing object 50 such as a person or a car passing through the area 40 in the direction 51 and a flying object 60 such as a bird flying in the area 40 or a plastic bag blown by the wind.

  The sensor 10 irradiates, for example, a millimeter wave band electromagnetic wave to the irradiation range 25 including the region 40 with a wide beam type beam pattern, and reflects the irradiated electromagnetic wave from the reflector 20, the passing object 50, the flying object 60, and the like. A radar that receives reflected waves.

  Further, the sensor 10 does not have an angular resolution for identifying a plurality of objects located at the same distance from the sensor 10. For this reason, if the distance from the sensor 10 is the same, the sensor 10 recognizes it as one object regardless of whether a plurality of objects are separated from each other. Therefore, in the detection system 200, in order to recognize the reflecting plates 20a, 20b, and 20c as different objects, they face each other across the region 40 so that the distances between the sensor 10 and the reflecting plates 20a, 20b, and 20c are different from each other. Arranged. For example, when the sensor 10 is disposed in the vicinity of the vertex A outside the region 40, the reflectors 20a, 20b, and 20c are disposed between the sides BC outside the region 40, respectively. The optical paths 21a, 21b, and 20c of the reflected waves that connect the sensor 10 and the reflecting plates 20a, 20b, and 20c intersect the direction in which the passing object 50 crosses the region 40. Therefore, the passing object 50 passing through the region 40 in the vertical direction in FIG. 3 blocks the reflected waves in the order of the optical paths 21a, 21b, and 21c, or blocks the reflected waves in the order of the optical paths 21c, 21b, and 21a. The sensor 10 detects that the reflected wave from each reflecting plate 20 is blocked by the passing object 50. The detection device 30 determines whether or not the passing object 50 is in the region 40 based on the detection by the sensor 10 and detects the movement of the passing object 50. In the following description, the electromagnetic wave in the millimeter wave band is simply referred to as millimeter wave. Moreover, the reflecting plate 20 is an example of a reflecting portion.

  The sensor 10 includes a control unit 11, a transmission unit 12, a reception unit 13, and a storage unit 15.

  For example, the control unit 11 includes a processor that executes a program stored in the storage unit 15 such as an EEPROM (Electrically Erasable Programmable Read-Only Memory), and controls each unit of the sensor 10. Moreover, the control part 11 performs the process of FM-CM (Frequency Modulated Continuous Wave) system etc. to the reflected wave from the reflecting plate 20, the passing object 50, the flying object 60, etc., for example. And the control part 11 has a function which measures the distance to the reflecting plate 20, the passing material 50, the flying object 60, etc., and the intensity | strength of a reflected wave. For example, the control unit 11 causes the transmission unit 12 to irradiate the irradiation range 25 with a millimeter wave having a frequency swept within a predetermined range at a time interval shorter than 1 second. The control unit 11 causes the reception unit 13 to receive a reflected wave from each reflector 20, the passing object 50, and the flying object 60 with respect to the irradiated millimeter wave as a reception signal. The control unit 11 obtains a beat signal by obtaining a difference in frequency between the irradiated millimeter wave transmission signal and the reception signal of the reflected wave from each reflector 20, the passing object 50, the flying object 60, and the like. The control unit 11 performs spectrum analysis such as Fourier calculation on the obtained beat signal, and determines the distance between the sensor 10 and the reflecting plate 20, the passing object 50, the flying object 60, and the like, and the reflecting plate from the beat signal spectrum data. 20. The intensity of the reflected wave from the passing object 50, the flying object 60, etc. is calculated.

  For example, the control unit 11 stores the calculated distance between the sensor 10 and each reflector 20, the passing object 50, the flying object 60, and the like and the intensity of the reflected wave in the storage unit 15 as log data 17 together with information on the measurement date and time. To do. The log data 17 will be described with reference to FIG. In addition, the control unit 11 obtains data including measurement date / time information, the calculated distance between the sensor 10 and each reflecting plate 20, the passing object 50, the flying object 60, and the like and the intensity of the reflected wave from each reflecting plate 20. Is output to the detection device 30 as reflection information indicating the continuity of the reflected wave in time series.

  Further, the control unit 11 and the storage unit 15 may be arranged outside the sensor 10. For example, the transmission unit 12 of the sensor 10 emits millimeter waves based on the control of the detection device 30, and the reception unit 13 receives reflected waves from the reflector 20, the passing object 50, the flying object 60, and the like. The sensor 10 outputs the transmission signal of the transmission unit 12 and the reception signal of the reception unit 13 to the detection device 30. Then, the detection device 30 performs processing such as FM-CW method on the received transmission signal and reception signal, and calculates the distance between the sensor 10 and the reflection plate 20, the passing object 50 and the flying object 60, and the intensity of the reflected wave. Alternatively, the log data 17 may be stored in a built-in storage unit such as an EEPROM.

  In addition, the detection system 200 includes three reflectors 20a, 20b, and 20c, but may include two or more reflectors 20. In this case, it is preferable that the reflecting plates 20 are arranged at intervals larger than the resolution of the distance that the sensor 10 has.

  The detection device 30 is, for example, a computer. The detection device 30 includes a communication unit 31, a control unit 32, an output unit 34, and a storage unit 35, and receives data output from the sensor 10 connected by wire or wirelessly. The detection device 30 acquires, from the received data, information indicating the time series in which blocking of the reflected wave from each reflector 20 is observed, that is, the order in which the reflected wave is blocked. The detection device 30 determines whether or not the passing object 50 is in the region 40 based on the order in which the reflected waves from the respective reflectors 20 are blocked (even when the sensor 10 does not have angular resolution), and in the region 40. The movement of the passing object 50 is detected.

  The communication unit 31 reflects data including the measurement date and time, the calculated distance between the sensor 10 and each reflecting plate 20, the passing object 50, the flying object 60, and the like and the intensity of the reflected wave from each reflecting plate 20. Wave reflection is received from the sensor 10 as reflection information indicating time series. The communication unit 31 outputs the received data to the control unit 32. In addition, the communication unit 31 outputs a control instruction from the control unit 32 to the sensor 10. The communication unit 31 is an example of a reception unit.

  The control unit 32 includes, for example, a processor that executes a program stored in the storage unit 35 such as an EEPROM and controls each unit of the detection device 30. The determination unit 33 is realized by the control unit 32 executing the detection program stored in the storage unit 35.

  The determination unit 33 determines whether there is an object in the region 40 based on the received log data 17. Further, as will be described with reference to FIG. 6, the determination unit 33 determines whether the object in the region 40 is a passing object 50 such as a person or a car or a flying object 60 such as a bird or a plastic bag blown by the wind. .

  The output unit 34 outputs the determination result to an external computer or the like when the determination unit 33 determines that the object is the passing object 50, and when the object is determined as the flying object 60, the output unit 34 sees the output of the determination result. Thereby, for example, when the area 40 is a railroad crossing, even if a flying object 60 that does not interfere with the train operation enters the railroad crossing, it is possible to avoid stopping the train approaching the railroad crossing.

  FIG. 4 shows an example of the intensity distribution of the reflected wave calculated by the sensor 10 shown in FIG. 4A and 4B, the horizontal axis indicates the distance from the sensor 10, and the vertical axis indicates the intensity distribution of the reflected wave. Further, for example, the distance between the sensor 10 and the reflection plate 20a is 8 meters, the distance between the sensor 10 and the reflection plate 20b is 10 meters, and the distance between the sensor 10 and the reflection plate 20c is 12 meters.

  FIG. 4A shows the intensity distribution of the reflected wave when there is no object in the region 40. In FIG. 4A, the intensity distribution has peaks exceeding the threshold α at, for example, 8 meters, 10 meters, and 12 meters where the reflectors 20a, 20b, and 20c are arranged.

  FIG. 4B shows, for example, the intensity distribution when the passing object 50 crosses the optical path 21b shown in FIG. 3 at a position 9 meters from the sensor 10 in the region 40 and blocks the reflected wave from the reflecting plate 20b. Indicates. In FIG. 4B, the intensity distribution has a peak exceeding the threshold value α at distances of 8 meters, 12 meters, and 9 meters where the reflectors 20a, 20c and the passing object 50 are present. On the other hand, the intensity distribution has a peak smaller than the threshold value α because the reflected wave is blocked by the passing object 50 at a distance of 10 meters where the reflector 20b is disposed.

  Here, the threshold value α is a reference value by which the control unit 11 determines whether or not there is a reflected wave. That is, the control unit 11 determines that there is a reflected wave from the reflecting plate 20 or the passing object 50 when the intensity of the reflected wave is equal to or greater than the threshold value α, and when the reflected wave intensity is less than the threshold value α, It is determined that there is no reflected wave from the passing object 50. In FIG. 4A, the control unit 11 determines that there are reflected waves from the reflecting plates 20a, 20b, and 20c. In FIG. 4B, the control unit 11 determines that there are reflected waves from the reflecting plates 20a and 20c and the passing object 50, and determines that there is no reflected wave from the reflecting plate 20b. FIG. 4 shows the case where the passing object 50 blocks the reflected wave from the reflecting plate 20, but the same applies to the case where the flying object 60 blocks the reflected wave from the reflecting plate 20.

  5 and 6 show examples of the log data 17 shown in FIG. The log data 17 has a storage area for storing, for example, the measurement date and time of the reflected wave and the intensity of the reflected wave corresponding to each distance of 0.5 meters. For example, in the storage area corresponding to each distance of the log data 17, when the intensity of the reflected wave is smaller than the threshold value α and the control unit 11 determines that there is no reflected wave, the value “0” is stored and the reflected wave is stored. Is greater than or equal to the threshold value α and the control unit 11 determines that there is a reflected wave, the value “1” is stored. However, the storage area corresponding to each distance of the log data 17 may store the intensity value of the reflected wave instead of storing the value of “0” or “1” for the presence or absence of the reflected wave. The value “1” stored in the storage area of 8 meters, 10 meters, and 12 meters in FIGS. 5 and 6 indicates that there are reflected waves from the reflecting plates 20a, 20b, and 20c.

  FIG. 5A shows, for example, a process in which the passing object 50 passes through the region 40 in the direction 51 shown in FIG. 3 and the passing object 50 crosses in the order of the optical paths 21a, 21b, and 21c. The measurement results obtained every second from 12:00:00 on March 5 to 12:00:00 are shown. In FIG. 5A, a passing object 50 appears at a position 7.5 meters from the sensor 10 by detecting a reflected wave corresponding to a distance of 7.5 meters on March 5, 2013 at 12:02:00. It shows that. At this time, since the intensity at 8 meters decreases, it can be seen that the passing material 50 has crossed the optical path 21 a and entered the region 40. The value “1” sequentially stored in the storage area corresponding to the distance from 17.5 meters to 11.5 meters between 12:02:00 and 12:00:10 50 indicates that a position from 7.5 meters to 11.5 meters from sensor 10 has been passed. Since the intensity at 10 meters decreases at 12: 00: 5, it can be seen that the passing object 50 has crossed the optical path 21b. Moreover, since the intensity | strength in 12 meters falls in 12:00:00, it turns out that the passing material 50 crossed the optical path 21c. That is, FIG. 5A shows that the passing object 50 is 7.5 meters, 9 meters, and 10.5 from the sensor 10 at 12: 0: 2 seconds, 12: 0: 5 seconds, and 12: 0: 8 seconds. It shows that the optical path 21a, 21b, 21c has been crossed at the meter position.

  FIG. 5B shows, for example, a case where the passing material 50 crosses in the order of the optical paths 21c, 21b, and 21a in the process in which the passing material 50 passes through the region 40 in the opposite direction to the case of FIG. The obtained measurement results are shown. Fig. 5 (b) shows the measurement result every 1 second from 12:00:00 on March 5, 013 to 12:00:10 and corresponds to a distance of 11.5 meters at 12:01:00. By detecting the reflected wave, the passing object 50 appears at a position 11.5 meters from the sensor 10. Since the value “1” was sequentially stored in the storage area corresponding to the distance from 11.5 meters to the distance of 7.5 meters between 12:01:00 and 12:09:00, it passed. It shows that the object 50 has passed the position from 11.5 meters to 7.5 meters from the sensor 10. Moreover, since the intensity | strength in 12 meters, 10 meters, and 8 meters falls in 12 hours 0 minutes 3 seconds, 5 seconds, and 9 seconds, it turns out that the passing material 50 crossed the optical paths 21c, 21b, and 20a in order. .

  FIG. 6A shows an example of the log data 17 when the flying object 60 stays flying on the optical path 21b in the region 40, for example. FIG. 6A shows a measurement result between 12:00:00 on March 5, 2013 and 12:00:10. .5 meter reflected wave detected. In addition, since the intensity at 10 meters decreases from 12: 0: 3 to 12: 0: 5, an object entering the region 40 is placed on the optical path 21 at a position 8.5 meters from the sensor 10. I can see that. Then, there is no measurement date and time at which the reflected waves from the reflecting plates 20a, 20b, and 20c are blocked before and after 12:00:00 in FIG. 6 (a). An object that can come on the optical path 21b without crossing the optical paths 21a and 21c is likely to be a bird or a plastic bag blown by the wind, so from March 5, 2013 at 12:01:00 An object that has entered the region 4 at 12:00:10 can be determined as a flying object 60.

  FIG. 6B shows an example of the log data 17 when the flying object 60 flies on the optical path 21b and moves toward the optical path 21a. FIG. 6B shows a measurement result between 12:00:00 on March 5, 2013 and 12:00:00 on March 5, 2013. Indicates that an 8.5 meter reflected wave has been detected. Since the value “1” is sequentially stored in the storage area from the distance of 8.5 meters to the distance of 7.5 meters from 12: 00: 4 to 12: 00: 6, The entered object indicates that it has passed the 8.5 to 7.5 meter position from the sensor 10. Since the intensity at 8 meters decreases at 12: 00: 6, it can be seen that the object that entered the region 40 crossed the optical path 21a and went out of the region 40. Then, there is no measurement date and time when the reflected waves from the reflecting plates 20a, 20b, and 20c are blocked before 12: 00: 3 in FIG. 6B. Since an object that can come on the optical path 21b without traversing the optical paths 21a and 21c is likely to be a bird or a plastic bag or the like that is blown by the wind, the flying object 60 and the like are the same as in FIG. I can judge.

  From the above, as shown in FIG. 5, when the object entering the region 40 is the passing object 50, the optical path 21a or the optical path 21c located at both ends of the optical path 21 is traversed first, and then the optical path 21b crosses. On the other hand, as shown in FIG. 6, when the object entering the region 40 is the flying object 60, the central optical path 21 b of the optical path 21 is blocked first. Therefore, when the passing object 50 passes through the region 40, the reference pattern of the passing object 50 in which the blocking of the reflected wave from the reflecting plate 20b appears after the blocking of the reflected wave from the reflecting plate 20a or the reflecting plate 20c, A reflected wave from each reflector 20 is observed. In addition, when the flying object 60 jumps into the region 40, the blocking of the reflected wave from the reflecting plate 20b first appears without blocking the reflected wave from the reflecting plate 20a or the reflecting plate 20c. A reflected wave from each reflector 20 is observed with the reference pattern. The reference pattern of the passing object 50 and the flying object 60 is an example of a second pattern indicating a time series that can be set in advance from the assumed behavior of the passing object 50 and the flying object 60.

  FIG. 7 shows an example of detection processing in the detection system 200 shown in FIG. The processing from step S30 to step S34 is realized by the control unit 32 of the detection device 30 executing the detection program stored in the storage unit 35. The processing from step S40 to step S43 is realized by the control unit 11 of the sensor 10 executing a program stored in the storage unit 15. Steps S30 to S34 in FIG. 6 show examples of the detection program and the detection method.

  In step S <b> 30, the control unit 32 of the detection device 30 outputs an irradiation instruction to irradiate the millimeter wave to the sensor 10.

  In step S <b> 40, when the control unit 11 of the sensor 10 receives an irradiation instruction from the detection device 30, for example, the transmission unit 12 irradiates millimeter waves with a frequency swept within a predetermined range at a time interval shorter than 1 second. To start.

  In step S41, the receiving unit 13 of the sensor 10 receives reflected waves from the passing object 50, the flying object 60, and the like together with the reflectors 20a, 20b, and 20c.

  In step S42, for example, the control unit 11 performs the FM-CM method or the like for the irradiated millimeter wave transmission signal and the reception signals of the reflected waves from the passing object 50, the flying object 60 and the like together with the reflecting plates 20. Apply the process. The control unit 11 calculates the distance from the sensor 10 to each reflector 20, the passing object 50, and the flying object 60 and the intensity of the reflected wave. For example, as illustrated in FIGS. 5 and 6, the control unit 11 sets the calculated distance and the intensity of the reflected wave to a value “0” indicating that there is no reflected wave or a value “1” indicating that there is a reflected wave. Thus, the data is stored in the storage area of each distance corresponding to the measurement date and time in the log data 17.

  In step S43, the control unit 11 includes data “0” indicating that there is no reflected wave stored at each distance of 0.5 meters, or “1” indicating that there is a reflected wave, together with the measurement date and time. Is output to the control device 30.

  On the other hand, in step S <b> 31, the communication unit 31 receives data including the value “0” or the value “1” stored at each distance of 0.5 meters together with the measurement date and time from the sensor 10. The communication unit 31 outputs the received data to the determination unit 33 of the control unit 32. In addition, the control unit 32 stores the received data in the storage unit 35.

  In step S <b> 32, the determination unit 33 determines whether an object has entered the region 40. For example, the determination unit 33 detects the reflecting plate 20 where the reflected wave is blocked based on the value stored in the storage area corresponding to the distance of 8 meters, 10 meters, or 12 meters in the received data. When the value “0” is stored in the storage area corresponding to the distance of 8 meters, 10 meters, or 12 meters, the determination unit 33 detects the reflection plate 20 where the reflected wave is blocked, and the object enters the area 40. It is determined that And the determination part 33 transfers to the process (YES side) of step S33. On the other hand, when the value “0” is not stored in the storage areas corresponding to the distances of 8 meters, 10 meters, and 12 meters, the determination unit 33 determines that there is no object that has entered the area 40, and the process of step S31 ( (NO side).

  In step S <b> 33, the determination unit 33 determines whether the object that has entered the region 40 is the flying object 60. For example, the determination unit 33 compares the reflecting plate 20 where the reflected wave detected in step S <b> 32 is blocked with the reference pattern of the flying object 60. In the received data, when the value “0” is stored in the storage area corresponding to the distance of 10 meters of the reflecting plate 20b in the received data, the determination unit 33 enters the area 40 because it matches the reference pattern of the flying object 60. The determined object is determined as a flying object 60. And the determination part 33 transfers to the process (YES side) of step S31. On the other hand, when the value “0” is stored in the storage area corresponding to the distance 8 meters of the reflecting plate 20a or the distance 10 meters of the reflecting plate 20c, the determination unit 33 is different from the reference pattern of the flying object 60. An object that has entered the region 40 is determined as a passing object 50. And the determination part 33 transfers to the process (NO side) of step S34.

  In step S <b> 34, the output unit 34 outputs an alarm indicating that the passing object 50 has entered the region 40 by the determination unit 33 to an external computer or the like for notification. For example, when the area 40 is a railroad crossing and the output destination is a computer of a management center that manages the operation of a train, the computer of the management center can detect the train on the train approaching the railroad crossing based on the received alarm. A stop signal is output and the train approaching the railroad crossing is stopped. In addition, the computer of the management center outputs the received alarm to the computer at the nearest station, and the station staff at the nearest station removes the passing material 50 that has entered the railroad crossing in the area 40 based on the received alarm. Also good. The alarm is an example of a determination result.

  For example, when the region 40 is a railroad crossing or the like and the railroad crossing is closed, the detection device 30 performs the processing from step S30 to step S34, and the sensor 10 performs the processing from step S40 to step S43. Is preferred. For example, when the railroad crossing is opened, it is preferable that the control unit 32 of the detection device 30 instructs the sensor 10 to stop the irradiation of millimeter waves and ends the series of processes.

  As described above, in this embodiment, the determination unit 33 determines whether the object that blocks the reflected wave from each reflector 20 is the passing object 50 or the flying object 60 based on the data received from the sensor 10. . The output unit 34 outputs an alarm that the passing material 50 has entered the area 40 when the determining unit 33 determines that the passing material 50 is present. On the other hand, if the output unit 34 determines that the flying object 60 is detected by the determination unit 33, for example, an alarm indicating that an object has entered the railroad crossing with respect to a train or a computer of a management center that manages the operation of the train. Put off the output. That is, since the detection system 200 can detect and detect the passing object 50 and the flying object 60, the false alarm by the flying object 60 can be reduced compared with the past.

  In this embodiment, when the determination unit 33 determines that the object entering the region 40 is the flying object 60 in step S33, the process proceeds to step S31. However, the present invention is not limited to this. For example, if the flying object 60 remains in the area 40 for a predetermined time such as 6 seconds or more in step S33, the determination unit 33 determines that the object that has entered the area 40 is a passing object, and performs the process in step S34. You may migrate.

  In this embodiment, in step S33, the determination unit 33 compares the reflecting plate 20 where the reflected wave detected in step S32 is blocked with the reference pattern of the flying object 60, but is not limited thereto. For example, the determination unit 33 may compare the reflecting plate 20 in which the reflected wave detected in step S <b> 32 is blocked with the reference pattern of the passing object 50. That is, in the received data, when the value “0” is stored in the storage area corresponding to the distance of 10 meters of the reflecting plate 20b in the received data, the determination unit 33 is different from the reference pattern of the passing object 50. The entered object is determined as a flying object 60. And it is preferable that the determination part 33 transfers to the process of step S31. On the other hand, when the value “0” is stored in the storage area corresponding to the distance 8 meters of the reflecting plate 20a or the distance 12 meters of the reflecting plate 20c, the determination unit 33 matches the reference pattern of the passing object 50. The object that has entered the region 40 is determined as the passing object 50. And it is preferable that the determination part 33 transfers to the process of step S34.

  8 and 9 show another embodiment of the detection system and the detection device. FIG. 8 and FIG. 9 show a case where the detection system 300 is arranged at a railroad crossing of the single track 80 having the breaker 70 (70a, 70b). FIG. 8 is an overhead view of a crossing. FIG. 9 is a plan view of FIG. 8 and 9 show an example of a state in which the barrier bar 71 (71a, 71b) of the breaker 70 is lowered and the railroad crossing is closed. 8 and 9 that have the same or equivalent functions as the elements shown in FIG. 3 are given the same reference numerals, and descriptions thereof are omitted.

  The detection system 300 includes the sensor 10 (10a, 10b), the reflector 20 (20a, 20b, 20c, 20d) and the detection device 30. The detection system 300 detects a passing object such as a person or a car entering the railroad crossing 40a where the track 80 and the road 90 intersect when the railroad crossing is closed.

  The sensors 10a and 10b are, for example, in the vicinity of the vertex A and the vertex C facing each other outside the railroad crossing 40a so that the irradiation range 25a and the irradiation range 25b of the wide beam type beam pattern overlap each other. Be placed. Thereby, sensor 10a, 10b can irradiate a millimeter wave to the whole railroad crossing 40a. Moreover, each sensor 10 is installed in the position of about 60 centimeters-about 65 centimeters from the ground, for example, in order to detect passing objects, such as a person who invades a railroad crossing, and a motor vehicle.

  The reflectors 20a and 20b are disposed so as to face the sensor 10a across the railroad crossing 40a in order to detect an object entering the railroad crossing 40a. For example, since the sensor 10 is disposed in the vicinity of the vertex A outside the railroad crossing 40a, the reflectors 20a and 20b are respectively disposed in the vicinity of the vertexes B and C outside the railroad crossing 40a. Reflected wave optical paths 21a and 21b connecting the sensor 10a and the reflecting plates 20a and 20b intersect with passing objects such as the automobile 110 passing through the railroad crossing 40a.

  On the other hand, the reflecting plates 20c and 20d are arranged so as to face the sensor 10b across the railroad crossing 40a in order to detect an object entering the railroad crossing 40a. For example, since the sensor 10b is disposed in the vicinity of the vertex C outside the railroad crossing 40a, the reflectors 20c and 20d are respectively disposed in the vicinity of the vertexes A and D outside the railroad crossing 40a. The optical paths 21c and 21d of the reflected wave connecting the sensor 10b and the reflecting plates 20c and 20d intersect with the passing object passing through the railroad crossing 40a.

  Each reflector 20 is installed at a height of about 60 cm to 65 cm from the ground in the same manner as the sensor 10. Further, the reflecting plate 20 shown in FIG. 7 has a triangular pyramid shape, but is not limited to this, and has any shape as long as it reflects the irradiated millimeter wave toward the sensor 10. Also good. Moreover, the reflecting plate 20 is an example of a reflecting portion.

  In the detection system 300, for example, the distance between the sensor 10a and the reflecting plate 20a is 10 meters, and the distance between the sensor 10a and the reflecting plate 20b is 12 meters. For example, the distance between the sensor 10b and the reflecting plate 20d is 10 meters, and the distance between the sensor 10b and the reflecting plate 20c is 12 meters.

  The detecting device 30 irradiates the sensors 10a and 10b with millimeter waves when the blocking bar 71 of the circuit breaker 70 is lowered and the level crossing is closed, so that a passing object such as an automobile 110 entering the level crossing road 40a, or a bird or The flying object 60 such as a plastic bag blown by the wind is detected.

  FIG. 10 shows an example of the sensor 10 shown in FIGS. 8 and 9. 10 that have the same or equivalent functions as the elements shown in FIG. 3 are denoted by the same reference numerals and description thereof is omitted.

  Based on the control instruction of the control unit 11, the transmission unit 12, for example, transmits a millimeter-wave transmission signal in which a frequency is swept within a predetermined range at a time interval shorter than 1 second via the antenna unit 16 via the irradiation range 25. Irradiate (25a, 25b). The transmission unit 12 also outputs a millimeter wave transmission signal to the control unit 11.

  The receiving unit 13 receives, through the antenna unit 16, signals of reflected waves from passing objects and flying objects 60 that have entered the railroad crossing 40a, along with reflected waves from the reflecting plates 20 with respect to the irradiated millimeter waves. To do. The receiving unit 13 outputs the received signal of the reflected wave to the control unit 11.

  The communication unit 14 outputs the reflection information including the calculated distance information and the log data 17 stored in the storage unit 15 to the detection device 30, receives a control instruction from the detection device 30, and receives the received control instruction. Output to the control unit 11.

  FIG. 11 shows an example of the detection device 30 shown in FIGS. 8 and 9. 11 that have the same or equivalent functions as the elements shown in FIG. 3 are assigned the same reference numerals and explanations thereof are omitted.

  The communication unit 31a receives data such as reflection information and log data 17 from the sensors 10a and 10b. The communication unit 31 a has a function of receiving, for example, a signal that detects a train approaching a railroad crossing from a detector installed on the track 80 and a signal that indicates the open / close state of the barrier bar 71 from the circuit breaker 70. The communication unit 31 a outputs the received data such as the log data 17, the detection signal from the detector, and the signal from the circuit breaker 70 to the control unit 32. Further, the communication unit 31a outputs control instructions for the sensors 10a and 10b received from the control unit 32 to the sensors 10a and 10b, respectively. The communication unit 31a is an example of a reception unit.

  FIG. 12 shows an example of the log data 17 (17a, 17b) shown in FIG. FIGS. 12A and 12B show, for example, logs acquired by the sensors 10a and 10b when the flying object 60 flies on the optical path 21b and moves toward the optical path 21c when the railroad crossing is closed. An example of data 17a, 17b is shown. The value “1” stored in the storage areas of the distances of 10 meters and 12 meters in FIGS. 12A and 12B indicates the reflected waves by the reflecting plates 20a and 20b and the reflecting plates 20d and 20c.

  FIG. 12A shows measurement results every second from 12:00:00 on March 5, 2013 to 12:00:10. FIG. 12A shows that the flying object 60 has come to a position 9 meters from the sensor 10a by detecting a reflected wave with a distance of 9 meters at 12:03:00 on March 5, 2013. At this time, since the intensity at a distance of 12 meters decreases, it can be seen that the flying object 60 flies on the optical path 21b and blocks the reflected wave from the reflecting plate 20b. Then, from 12: 00: 4 to 12: 0: 6, the value “1” was sequentially stored in the storage area from the distance 9 meters to the distance 10 meters, and the strength at the distance 12 meters was recovered. It shows that. That is, it can be seen that the flying object 60 moved from the sensor 10 to the position of 9 to 10 meters from the optical path 21b toward the optical path 21c.

  Fig. 12 (b) shows the measurement results for every second between 12:00:00 on March 5, 2013 and 12:00:10. The reflected wave with a distance of 2 meters is detected at 12: 00: 6. That is, the flying object 60 moves toward the optical path 21c and has moved to a position of 2 meters from the sensor 10b. Since the intensity at a distance of 12 meters decreases at 12:00:00 and 12:07:00, the flying object 60 is located on the optical path 21c of 2 meters from the sensor 10b, and is from the reflector 20c. Indicates that the reflected wave has been blocked. In FIG. 12B, the strength at the distance of 12 meters is restored at 12:00:00, and the value “0” is stored in the storage area other than the distance of the distance of 10 meters and the distance of 12 meters. This means that the flying object 60 has left the railroad crossing 40a.

  FIG. 13 illustrates an example of detection processing in the detection system 300 illustrated in FIGS. 8 and 9. The processing from step S100 to step S110 is realized by the control unit 32 of the detection device 30 executing the detection program stored in the storage unit 35. The processing from step S200 to step S204 is realized by the control unit 11 of the sensor 10 executing a program stored in the storage unit 15. Steps S100 to S110 in FIG. 12 show examples of the detection program and the detection method.

  In step S100, the control part 32 determines whether the signal which detected the train which approaches a railroad crossing with the detector installed in the track | orbit 80 was received via the communication part 31a. The control part 32 transfers to the process (YES side) of step S101, when a detection signal is received. On the other hand, the control part 32 waits until a detection signal is received, when the detection signal is not received (NO side).

  In step S101, the control unit 32 outputs an irradiation instruction to irradiate the millimeter waves to the sensors 10a and 10b.

  In step S200, when the transmission unit 11 of the sensors 10a and 10b receives an irradiation instruction from the control unit 32 of the detection device 30, for example, the transmission unit 12 has a frequency within a predetermined range at a time interval shorter than 1 second. Start irradiation of the swept millimeter wave.

  In step S201, the receiving units 13 of the sensors 10a and 10b respectively receive reflected waves from passing objects, flying objects 60, and the like to the reflecting plates 20 and the automobile 110 that has entered the railroad crossing 40a. The receiving unit 13 outputs the received reflected wave to the control unit 11 as a received signal.

  In step S202, the control unit 11 of each sensor 10 receives a millimeter wave transmission signal from the transmission unit 12 and a reception signal of a reflected wave from the reception unit 13, and performs processing such as an FM-CM method, for example. The control unit 11 calculates the distance from the sensor 10 to each reflector 20, the passing object, the flying object 60, and the like and the intensity of the reflected wave. For example, the control unit 11 of the sensor 10a measures the calculated distance and the intensity of the reflected wave with the value “0” indicating that there is no reflected wave or the value “1” indicating that there is a reflected wave, in the log data 17a. It stores in the storage area of each distance every 0.5 meters corresponding to the day and time. The control unit 11 of the sensor 10b measures the calculated distance and the intensity of the reflected wave with the value “0” indicating that there is no reflected wave or the value “1” indicating that there is a reflected wave, in the log data 17b. It stores in the storage area of each distance every 0.5 meters corresponding to the day and time.

  In step S203, the control unit 11 of the sensors 10a and 10b together with the measurement date and time has a value “0” indicating that there is no reflected wave stored at each distance of 0.5 meters or a value “that indicates that there is a reflected wave”. 1 ”is output to the control device 30.

  In step S <b> 204, the control unit 11 of the sensors 10 a and 10 b determines whether or not a millimeter wave irradiation stop instruction has been received from the detection device 30, for example, when the train has passed the level crossing and the level crossing has been opened. When the control unit 11 of the sensors 10a and 10b receives a stop instruction (YES side), the millimeter wave irradiation is stopped. On the other hand, the control part 11 of sensor 10a, 10b transfers to the process of step S201 as a false determination (NO) of step S204, when the stop instruction | indication is not received.

  On the other hand, in step S102, the communication unit 31a of the detection device 30 includes data “0” or “1” stored at each distance of 0.5 meters together with the measurement date and time from the sensors 10a and 10b. Accept. The communication unit 31a outputs the received data to the determination unit 33. In addition, the control unit 32 a stores the received data in the storage unit 35.

  In step S103, the determination unit 33 determines whether an object has entered the railroad crossing 40a. For example, in the received data, the determination unit 33 reflects the reflected wave blocked based on values stored in a storage area of a distance of 8 meters of the reflection plates 20a and 20d and a storage area of 12 meters of the reflection plates 20b and 20c. The plate 20 is detected. When the value “0” is stored in the storage area having a distance of 10 meters or 12 meters, the determination unit 33 detects the reflection plate 20 where the reflected wave is blocked, and determines that an object has entered the railroad crossing 40a. To do. And the determination part 33 transfers to the process (YES side) of step S104. On the other hand, the determination unit 33 enters the railroad crossing 40a when the value “0” is not stored in any of the storage areas of 10 meters away from the reflecting plates 20a and 20d and 12 meters from the reflecting plates 20b and 20c. It determines with there being no object, and transfers to the process (NO side) of step S109.

  In step S104, the determination unit 33 determines whether the object that has entered the railroad crossing 40a is a passing object or a flying object 60, and the reflecting plate whose reflected wave is blocked in step S103 is the reflecting plate 20b. It is determined whether or not. If the value “0” is stored in the storage area of the reflecting plate 20b with a distance of 12 meters in the received data, the determination unit 33 proceeds to the process of step S105 (YES side). On the other hand, when the value “1” is stored in the storage area of the reflecting plate 20b with a distance of 12 meters, the determination unit 33 proceeds to the process of Step S106 (NO side).

  In step S <b> 105, the determination unit 33 determines whether the object that blocks the reflected wave from the reflecting plate 20 b is the flying object 60. Therefore, the determination unit 33 determines whether or not an object that blocks the reflected wave from the reflecting plate 20b has entered the railroad crossing 40a across the optical path 21a. For example, the determination unit 33 retrieves the data received before the data received in step S102 and stores the data stored in the storage unit 35, and whether the value “0” is stored in the storage area of the reflecting plate 20a with a distance of 10 meters. Determine whether or not. When there is no measurement date / time data in which the value “0” is stored in the storage area having a distance of 10 meters, the determination unit 33 determines that the object that blocks the reflected wave from the reflecting plate 20 b is the flying object 60. The determination unit 33 determines that the flying object 60 does not hinder the operation of the train, checks the output of the determination result to the outside, and proceeds to the process of step S109 (YES side). On the other hand, when the data of the measurement date and time when the value “0” is stored in the storage area with a distance of 10 meters is detected, the determination unit 33 crosses the object that blocks the reflected wave from the reflecting plate 20b across the optical path 21a. It is determined that the passing object has entered the road 40a. The determination unit 33 proceeds to the process of Step S108 (NO side).

  In step S106, in order to determine whether the object that has entered the railroad crossing 40a is a passing object or a flying object 60, the determination unit 33 determines that the reflection plate whose reflected wave has been blocked in step S103 is the reflection plate 20c. It is determined whether or not. If the value “0” is stored in the storage area of the reflecting plate 20c with a distance of 12 meters in the received data, the determination unit 33 proceeds to the process of step S107 (YES side). When the value “1” is stored in the storage area of the reflecting plate 20c with a distance of 12 meters, the determination unit 33 determines that the object that has entered the railroad crossing 40a is a passing object, and performs the process of step S108 (NO side). ).

  In step S107, the determination unit 33 determines whether or not the object that blocks the reflected wave from the reflecting plate 20c is the flying object 60. Therefore, the determination unit 33 determines whether or not an object that has blocked the reflected wave from the reflecting plate 20c has entered the railroad crossing 40a across the optical path 21d. For example, the determination unit 33 retrieves data having a measurement date and time prior to the data received in step S102 and stored in the storage unit 35 and having the value “0” stored in the storage area of the reflecting plate 20d at a distance of 10 meters. To do. When there is no data in which the value “0” is stored in the storage area of the reflecting plate 20d with a distance of 10 meters, the determining unit 33 determines that the object that blocks the reflected wave from the reflecting plate 20c is the flying object 60. The determination unit 33 determines that the flying object 60 does not hinder the operation of the train, checks the output of the determination result to the outside, and proceeds to the process of step S109 (YES side). On the other hand, when the data of the measurement date and time when the value “0” is stored in the storage area with a distance of 10 meters is detected, the determination unit 33 crosses the object that blocks the reflected wave from the reflecting plate 20c across the optical path 21d. It is determined that the passing object has entered the road 40a. The determination unit 33 proceeds to the process of Step S108 (NO side).

  In step S <b> 108, the output unit 34 outputs a warning that the passing unit has entered the railroad crossing 40 a by the determination unit 33 to a computer such as an external management center and notifies it. For example, the computer of the management center outputs a train stop signal to the train approaching the level crossing based on the received alarm, and stops the train approaching the level crossing. Further, the computer such as the management center may output the received alarm to the computer at the nearest station, and the station staff at the nearest station may remove the passing material that has entered the railroad crossing 40a based on the received alarm. .

  In step S109, the control unit 32 determines whether or not a signal indicating that the train has passed the railroad crossing and the barrier bar 71 has been raised is received from the circuit breaker 70 via the communication unit 31a. When the control unit 32 receives a signal indicating that the blocking bar 71 has been raised from the circuit breaker 70, the control unit 32 proceeds to the processing of step S110 (YES side). On the other hand, when the determination unit 33 has not received a signal indicating that the barrier 71 has been raised from the circuit breaker 70, the determination unit 33 proceeds to the process of step S102 as a false determination (NO) of step S109.

  In step S110, the controller 32 outputs a millimeter wave irradiation stop instruction to the sensors 10a and 10b.

  As described above, in this embodiment, the determination unit 33 determines whether the object that blocks the reflected wave from each reflection unit 20 is a passing object or a flying object 60 based on the data received from the sensor 10. When the determining unit 33 determines that the passing object is present, the output unit 34 outputs an alarm that the passing object has entered the railroad crossing 40a. On the other hand, if the output unit 34 determines that the flying object 60 is detected by the determination unit 33, for example, an alarm indicating that an object has entered the railroad crossing with respect to a train or a computer of a management center that manages the operation of the train. Put off the output. Thereby, since the detection system 300 can distinguish and detect the passing object and the flying object 60, the false alarm by the flying object 60 can be reduced compared with the past.

  In this embodiment, when the reflected wave from the reflecting plate 20b is blocked in step S104, the determination unit 33 reflects the reflected wave from the reflecting plate 20a in step S105 based on whether or not the reflected wave is blocked. It was determined whether or not the object that blocked the reflected wave from the plate 20b was the flying object 60. Further, when the reflected wave from the reflecting plate 20c is blocked in step S106, the determining unit 33 reflects the reflected wave from the reflecting plate 20c based on whether the reflected wave from the reflecting plate 20d is blocked in step S107. It was determined whether the object that blocked the wave was a flying object 60 or not. However, it is not limited to this. For example, the determination unit 33 may determine whether or not the reflected wave from the reflecting plate 20b or the reflecting plate 20c is blocked in step S104. Then, in step S105, the determination unit 33 determines whether or not the reflected wave from the reflecting plate 20a or the reflecting plate 20d is blocked before the reflected wave from the reflecting plate 20b or the reflecting plate 20c is blocked. You may determine whether the object which interrupted the reflected wave from the board 20 is the flying object 60. FIG. Thereby, the determination part 33 can abbreviate | omit the process of step S106 and step S107, and can speed up the detection process in the detection apparatus 30 because the process number of processes reduces.

  In this embodiment, in Step S105 and Step S107, when the determination unit 33 determines that the object that blocks the reflected wave from the reflection plate 20b or the reflection plate 20c is the flying object 60, the process proceeds to Step S109. However, it is not limited to this. For example, in step S105 or step S107, the determination unit 33 determines that the flying object 60 is a passing object when the flying object 60 remains in the crossing for a predetermined time such as 6 seconds or more, and proceeds to the process of step S108. May be.

  In this embodiment, in step S108, the determination unit 33 outputs a warning that a passing object has entered the railroad crossing 40a to, for example, a computer such as a management center. However, the present invention is not limited to this. For example, the determination unit 33 may output a signal for canceling the output alarm to a computer such as a management center when the sensor 10 receives a reflected wave from all the reflection plates 20 after outputting the alarm.

  In this embodiment, the detection system 300 has the track 80 arranged on one single-line railroad crossing. However, the present invention is not limited to this. Can do. In the case of a double railroad crossing, one detection system 300 may be disposed on the double railroad crossing, or a plurality of detection systems 300 may be disposed on each track 80. Furthermore, when a plurality of detection systems 300 are arranged on each track 80, one detection device 30 may perform detection processing of the plurality of detection systems 300.

  FIG. 14 shows an example of the hardware configuration of the detection system and the detection apparatus. Elements similar to those shown in FIGS. 1, 3, and 8 to 11 are denoted by the same reference numerals, and description thereof is omitted.

  The sensor 10 includes a processor 150, a transmission unit 12, a reception unit 13, a memory 151, and an I / O interface 152. The processor 150, the transmission unit 12, the reception unit 13, the memory 151, and the I / O (Input / Output) interface 152 are connected to each other via a bus.

  The memory 151 stores the operating system of the sensor 10, for example. In addition, the memory 151 stores, for example, an application program for the processor 150 to execute the detection process illustrated in FIGS. 2, 7, and 13. Further, the memory 151 stores log data 17 and information on the distance to each reflector 20.

  The computer device CP includes a processor 160, a hard disk device 161, an I / O interface 162, a memory 163, and an optical drive device 164. The processor 160, the hard disk device 161, the I / O interface 162, the memory 163, and the optical drive device 164 are connected to each other via a bus.

  The computer apparatus CP is connected to the sensor 10 by wire or wireless via the I / O interface 162, for example. The computer apparatus CP is connected to an external computer apparatus or the like via the I / O interface 162.

  The optical drive device 164 can be loaded with a removable disk 165 such as an optical disk, and reads and records information stored in the mounted removable disk 165.

  The hard disk device 161 stores, for example, the operating system of the computer device CP. The hard disk device 161 also stores application programs such as a detection program for the processor 150 to execute the detection processing shown in FIGS. 2, 7, and 13. Note that application programs such as a detection program may be stored in the memory 163.

  An application program such as a detection program can be stored and distributed in a removable disk 165 such as an optical disk, for example. For example, the computer device CP may read an application program such as a detection program from the removable disk 165 via the optical drive device 164 and store it in the hard disk device 161 or the memory 163. The computer device CP may download an application program such as a detection program via a built-in communication device connected to a network such as the Internet and store the downloaded application program in the hard disk device 161 or the memory 163, for example.

  For example, the processor 160 executes the detection program stored in the hard disk device 161, the memory 163, or the like, thereby realizing the functions of the detection device 3 shown in FIG. 1 or the detection device 30 shown in FIGS. To do. That is, the detection device 3 and the detection device 30 can be realized by the cooperation of the processor 160, the hard disk device 161, the I / O interface 162, and the memory 163. For example, the determination unit 3 b illustrated in FIG. 1 and the determination unit 33 illustrated in FIGS. 3 and 11 are realized by the processor 160.

  From the above detailed description, features and advantages of the embodiments will become apparent. This is intended to cover the features and advantages of the embodiments described above without departing from the spirit and scope of the claims. Also, any improvement and modification should be readily conceivable by those having ordinary knowledge in the art. Therefore, there is no intention to limit the scope of the inventive embodiments to those described above, and appropriate modifications and equivalents included in the scope disclosed in the embodiments can be used.

Regarding the above embodiment, the following additional notes are disclosed.
(Appendix 1)
A transmission unit that irradiates an electromagnetic wave to a range including a predetermined region, and a reception unit that receives reflected waves from a plurality of reflection units that are disposed on the opposite side of the transmission unit across the predetermined region and reflect the electromagnetic wave From the sensor having, the reception unit receives reflection information indicating the continuity of the reflected wave from each reflection unit received by the reception unit in time series,
By comparing the first pattern indicating the time series of the cutoff of the reflected wave from each of the reflection parts included in the received reflection information with the second pattern set in advance, the reflection from each of the reflection parts Determine whether the object that blocked the wave is a passing object that passes through the area or a flying object that flies into the area,
When the object that blocks the reflected wave is determined as the passing object, the determination result is output to the outside.
A detection program that causes a computer to execute processing.
(Appendix 2)
In the detection program according to attachment 1,
The second pattern is a pattern indicating a time series in which the flying object blocks the reflected wave from each of the reflecting portions,
The detection program characterized in that, in the determination process, when the first pattern matches the second pattern, the object that blocks the reflected wave is determined as the flying object.
(Appendix 3)
In the detection program according to attachment 1,
The second pattern is a pattern indicating a time series in which the passing object blocks a reflected wave from each of the reflecting portions,
The detection program according to claim 1, wherein when the first pattern is different from the second pattern, the object that blocks the reflected wave is determined as the flying object.
(Appendix 4)
A transmission unit that irradiates an electromagnetic wave to a range including a predetermined region, and a reception unit that receives reflected waves from a plurality of reflection units that are disposed on the opposite side of the transmission unit across the predetermined region and reflect the electromagnetic wave A reception unit that receives reflection information in time series indicating the continuity of reflected waves from the respective reflection units received by the reception unit,
By comparing the first pattern indicating the time series of the cutoff of the reflected wave from each of the reflection parts included in the received reflection information with the second pattern set in advance, the reflection from each of the reflection parts A determination unit that determines whether an object that blocks the wave is a passing object that passes through the region or a flying object that flies to the region;
When the object that blocks the reflected wave is determined to be the passing object, an output unit that outputs the determination result to the outside;
A detection apparatus comprising:
(Appendix 5)
In the detection device according to attachment 4,
The second pattern is a pattern indicating a time series in which the flying object blocks the reflected wave from each of the reflecting portions,
The determination unit, when the first pattern and the second pattern coincide with each other, determines an object that blocks the reflected wave as the flying object.
(Appendix 6)
In the detection device according to attachment 4,
The second pattern is a pattern indicating a time series in which the passing object blocks a reflected wave from each of the reflecting portions,
The determination unit determines that an object that blocks the reflected wave is the flying object when the first pattern and the second pattern are different.
(Appendix 7)
A transmission unit that irradiates an electromagnetic wave to a range including a predetermined region, and a reception unit that receives reflected waves from a plurality of reflection units that are disposed on the opposite side of the transmission unit across the predetermined region and reflect the electromagnetic wave A sensor having
Reflection information indicating the continuity of reflected waves from the respective reflection units received by the reception unit in time series is received, and a first time series indicating the time series of blocking of the reflected waves from the respective reflection units included in the received reflection information is received. By comparing the pattern of 1 with a preset second pattern, it is determined whether the object that has blocked the reflected wave from each of the reflecting parts is a passing object that passes through the area or a flying object that jumps into the area A determination unit to perform,
When the object that blocks the reflected wave is determined to be the passing object, an output unit that outputs the determination result to the outside;
A detection system comprising:
(Appendix 8)
In the detection system according to attachment 7,
The second pattern is a pattern indicating a time series in which the flying object blocks the reflected wave from each of the reflecting portions,
The determination unit, when the first pattern and the second pattern coincide with each other, determines an object that blocks the reflected wave as the flying object.
(Appendix 9)
In the detection system according to attachment 7,
The second pattern is a pattern indicating a time series in which the passing object blocks a reflected wave from each of the reflecting portions,
When the first pattern and the second pattern are different from each other, the determination unit determines an object that blocks the reflected wave as the flying object.
(Appendix 10)
A transmission unit that irradiates an electromagnetic wave to a range including a predetermined region, and a reception unit that receives reflected waves from a plurality of reflection units that are disposed on the opposite side of the transmission unit across the predetermined region and reflect the electromagnetic wave From the sensor having, the reception unit receives reflection information indicating the continuity of the reflected wave from each reflection unit received by the reception unit in time series,
By comparing the first pattern indicating the time series of the cutoff of the reflected wave from each of the reflection parts included in the received reflection information with the second pattern set in advance, the reflection from each of the reflection parts Determine whether the object that blocked the wave is a passing object that passes through the area or a flying object that flies into the area,
When the object that blocks the reflected wave is determined as the passing object, the determination result is output to the outside.
A detection method characterized by the above.
(Appendix 11)
In the detection method according to attachment 10,
The second pattern is a pattern indicating a time series in which the flying object blocks the reflected wave from each of the reflecting portions,
In the detection method, when the first pattern and the second pattern match, the object that blocks the reflected wave is determined as the flying object.
(Appendix 12)
In the detection method according to attachment 10,
The second pattern is a pattern indicating a time series in which the passing object blocks a reflected wave from each of the reflecting portions,
In the detection method, when the first pattern and the second pattern are different from each other, the object that blocks the reflected wave is determined as the flying object.

DESCRIPTION OF SYMBOLS 1, 10, 10a, 10b ... Sensor; 1a, 12 ... Transmission part; 1b, 13 ... Reception part; 2, 2a, 2b, 2c ... Reflection part; 3, 30 ... Detection apparatus; 3a ... Reception part; ... determining part; 4 ... predetermined region; 5,50 ... passing object; 5a, 51 ... direction; 6,60 ... flying object; 7 ... range; 8a, 8b, 8c, 21a, 21b, 21c, 21d ... optical path; 11, 32, 32a ... control unit; 14, 31, 31a ... communication unit; 15, 35 ... storage unit; 16 ... antenna unit; 17, 17a, 17b ... log data; 20a, 20b, 20c, 20d ... reflector; 25, 25a, 25b ... irradiation range; 34 ... output part; 40 ... area; 40a ... railroad crossing; 70a, 70b ... breaker; 71a, 71b ... breaker fence; ... detection system; 110 ... automobile; 15 , 160 ... processor; 151,163 ... memory; 152, 162 ... I / O interface; 161 ... hard disk drive; 164 ... optical drive device; 165 ... removable disk; A, B, C, D ... vertex; CP ... computer device

Claims (6)

A transmission unit that irradiates an electromagnetic wave to a range including a predetermined region, and a reception unit that receives reflected waves from a plurality of reflection units that are disposed on the opposite side of the transmission unit across the predetermined region and reflect the electromagnetic wave From the sensor having, the reception unit receives reflection information indicating the continuity of the reflected wave from each reflection unit received by the reception unit in time series,
The first pattern indicating the time series of the cutoff of the reflected wave from each of the reflection parts included in the received reflection information is arranged on the outermost side in the direction in which the passing object passes through the region among the plurality of reflection parts. Reflected between a first reflection unit and a second reflection unit in which the path of the reflected wave is located, and a path of the reflected wave from the first reflection unit and a path of the reflected wave from the second reflection unit An object that blocks a reflected wave from each of the reflecting parts by comparing with a second pattern set in advance showing a time series of blocking of the reflected wave from the third reflecting part where the wave path is located Is a passing object passing through the area or a flying object flying into the area,
When the object that blocks the reflected wave is determined as the passing object, the determination result is output to the outside.
A detection program that causes a computer to execute processing. The detection program according to claim 1,
Pattern and the second pattern, which indicates a sequence when the flying object blocking the reflected waves from the third reflecting unit without interrupting the reflected waves from said first reflecting portion or the second reflecting portion And
The detection program characterized in that, in the determination process, when the first pattern matches the second pattern, the object that blocks the reflected wave is determined as the flying object. The detection program according to claim 1,
The second pattern is a pattern showing a time series in which the passing object blocks a reflected wave from the third reflecting unit after blocking a reflected wave from the first reflecting unit or the second reflecting unit. Yes,
The detection program according to claim 1, wherein when the first pattern is different from the second pattern, the object that blocks the reflected wave is determined as the flying object. A transmission unit that irradiates an electromagnetic wave to a range including a predetermined region, and a reception unit that receives reflected waves from a plurality of reflection units that are disposed on the opposite side of the transmission unit across the predetermined region and reflect the electromagnetic wave A reception unit that receives reflection information in time series indicating the continuity of reflected waves from the respective reflection units received by the reception unit,
The first pattern indicating the time series of the cutoff of the reflected wave from each of the reflection parts included in the received reflection information is arranged on the outermost side in the direction in which the passing object passes through the region among the plurality of reflection parts. Reflected between a first reflection unit and a second reflection unit in which the path of the reflected wave is located, and a path of the reflected wave from the first reflection unit and a path of the reflected wave from the second reflection unit An object that blocks a reflected wave from each of the reflecting parts by comparing with a second pattern set in advance showing a time series of blocking of the reflected wave from the third reflecting part where the wave path is located A determination unit that determines whether the passing object passes through the area or the flying object that jumps into the area;
When the object that blocks the reflected wave is determined to be the passing object, an output unit that outputs the determination result to the outside;
A detection apparatus comprising: A transmission unit that irradiates an electromagnetic wave to a range including a predetermined region, and a reception unit that receives reflected waves from a plurality of reflection units that are disposed on the opposite side of the transmission unit across the predetermined region and reflect the electromagnetic wave A sensor having
Reflection information indicating the continuity of reflected waves from the respective reflection units received by the reception unit in time series is received, and a first time series indicating the time series of blocking of the reflected waves from the respective reflection units included in the received reflection information is received. The first reflection portion and the second reflection portion in which the path of the reflected wave is located on the outermost side in the direction in which the passing object passes through the region among the plurality of reflection portions , and the first pattern , Showing a time series of blocking of the reflected wave from the third reflecting part where the reflected wave path is located between the reflected wave path from the reflecting part and the reflected wave path from the second reflecting part; A determination unit that determines whether an object that blocks a reflected wave from each reflection unit is a passing object that passes through the region or a flying object that jumps into the region by comparing with a second pattern that is set in advance.
When the object that blocks the reflected wave is determined to be the passing object, an output unit that outputs the determination result to the outside;
A detection system comprising: A transmission unit that irradiates an electromagnetic wave to a range including a predetermined region, and a reception unit that receives reflected waves from a plurality of reflection units that are disposed on the opposite side of the transmission unit across the predetermined region and reflect the electromagnetic wave From the sensor having, the reception unit receives reflection information indicating the continuity of the reflected wave from each reflection unit received by the reception unit in time series,
The first pattern indicating the time series of the cutoff of the reflected wave from each of the reflection parts included in the received reflection information is arranged on the outermost side in the direction in which the passing object passes through the region among the plurality of reflection parts. Reflected between a first reflection unit and a second reflection unit in which the path of the reflected wave is located, and a path of the reflected wave from the first reflection unit and a path of the reflected wave from the second reflection unit An object that blocks a reflected wave from each of the reflecting parts by comparing with a second pattern set in advance showing a time series of blocking of the reflected wave from the third reflecting part where the wave path is located Is a passing object passing through the area or a flying object flying into the area,
When the object that blocks the reflected wave is determined as the passing object, the determination result is output to the outside.
A detection method characterized by the above.

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