JP4454339B2 - Faller identification device - Google Patents

Description

  The present invention relates to a fallen person identifying device for identifying whether a person existing on a track near a platform provided at a station such as a railway is a fallen person or a maintenance person.

  In order to detect that a person or an object has fallen on the track from the station platform, for example, as shown in Patent Document 1, a transmitter and a receiver are provided along the track, and a millimeter wave is transmitted from the transmitter onto the track. Then, the millimeter wave reflected multiple times on the rail is received by the receiving device, and the electric field strength of the received millimeter wave is measured. If the measured electric field strength contains an AC component that exceeds the threshold, it falls onto the line. It is determined that there is a person.

In addition, the fallen person detection method disclosed in Patent Document 2 sets a region on a railway line in a station premises by distinguishing between a track region and a peripheral region around it, and uses a laser beam for the track region and the peripheral region. Using the inspection device, the object other than the permanent objects in the track area and the surrounding area is detected, and the object detected in the track area is judged as the maintenance person, and the object detected in the track area is the surrounding area. If there is no movement from the area, the object is determined to be a fallen person.
JP 2000-98050 A JP 2004-17869 A

  Although the fallen person detection method shown by patent document 1 is detecting the object which exists on a track | line, it is necessary to confirm whether the detected object is a fallen person or a maintenance person. It could not be detected quickly.

  In addition, the fallen person detection method disclosed in Patent Document 2 determines that an object detected in the trajectory area has moved from the peripheral area as a maintenance person, and the object detected in the trajectory area does not involve movement from the peripheral area. In this case, since the object is determined to be a fallen person, when the maintenance person is in the track area, there is a risk that the maintenance person may be mistakenly detected as a fallen person and the operation of the train may be hindered.

  The present invention improves such disadvantages, and can accurately detect the fallen person and the maintenance person who have fallen on the track from the platform, thereby preventing troubles in the operation of the train and ensuring the safety of the maintenance person. The object is to provide an identification device.

The fallen person identification device of the present invention has an obstacle detection device and an ID responder, and the ID responder is carried by a maintenance person who works near the track and indicates an identification signal indicating that he is a maintenance person The obstacle detection device has a sensor unit, an alarm control device, and an alarm device. The sensor unit irradiates an electromagnetic wave on a track near the home, and reflects from a reflecting object existing on the track. Receiving the wave and the maintenance person identification wave from the ID responder, detecting the reflection intensity of each reflecting object and the position of the reflecting object, generating a maintenance person identification signal, the alarm control device includes a determination processing unit, a storage unit, The determination processing unit stores the reflection object output from the sensor unit and the maintenance person identification signal in the storage unit, and the reflection object exists on the track due to the fluctuation of the reflection intensity and the position of the reflection object. The ID recognition unit determines whether the line is When it is determined that there is a reflective object above, it is determined whether or not the maintenance person identification signal is stored in the storage unit. When the maintenance person identification signal is not stored, the reflection existing on the track is determined. The object is determined to be a fallen person, and an alarm signal is output to the alarm device to notify the alarm.

  In addition, the alarm control device has an alarm communication unit, and the ID recognition unit determines whether or not a maintenance person identification signal is stored in the storage unit when the determination processing unit determines that there is a reflective object on the track. When the maintenance person identification signal is stored, the reflection object existing on the track is determined as the maintenance person, and the maintenance person recognition signal is sent to the alarm communication part. When the maintenance person recognition signal is sent from the sensor, a warning signal is sent to the sensor unit, and the sensor unit may send a transmission wave including the warning signal on the line.

  Further, it is desirable that the sensor unit radiates electromagnetic waves in the millimeter wave band or the microwave band.

  This invention irradiates an electromagnetic wave on a track near the home and receives a reflected wave from a reflecting object existing on the track, depending on whether or not a maintenance person identification wave from the maintenance person is included in the reflected wave. Since the reflective object existing on the track is identified as a fallen person or a maintenance person, the fallen person can be detected at an early stage. In addition, since the fallen person and the maintenance person are surely identified, it is possible to prevent the maintenance person from being erroneously detected as a fallen person and to prevent the operation of the train from being hindered.

  In addition, when a maintenance person is detected on the track, a warning is issued to the maintenance person using a transmission wave, so that the maintenance person can be secured and the train can be operated smoothly.

  Furthermore, by radiating millimeter wave band or microwave band electromagnetic waves from the sensor unit, it is possible to accurately detect each reflective object without being affected by disturbance, and to reliably identify a fallen person and a maintenance person. .

  FIG. 1 is a block diagram showing the configuration of a fallen person identification apparatus according to the present invention. As shown in the figure, the fallen person identification device is carried by the obstacle detection device 1 and a maintenance person working near the track, and transmits an identification signal indicating that the person is a maintenance person using electromagnetic waves, for example, millimeter waves. The ID responder 2 receives an electromagnetic wave transmitted from the obstacle detection device 1, for example, a millimeter wave.

  The obstacle detection device 2 includes a sensor unit 3, an alarm control device 4, and an alarm device 5. The sensor unit 3 irradiates an electromagnetic wave, for example, a millimeter wave, on a track near the platform in the station premises, receives a reflected wave from a reflecting object existing on the track and an identification wave from the ID responder 2, and receives each reflecting object. The signal processing unit 6, the modulation / demodulation unit 7, the amplification unit 8, and the antenna 9 are detected. The modulation / demodulation unit 7 modulates the frequency of the transmission wave sent from the signal processing unit 6 according to the radar system, obtains an intermediate frequency signal, and sends it to the amplification unit 87. This radar system may be any of FM (Frequency Modulated) -CW (Continuous Wave) system, pulse system, 2-frequency CW system, or spread spectrum system as long as the distance of an object can be detected. The amplification unit 8 sends the intermediate frequency signal sent from the modulation / demodulation unit 7 to the antenna 9 after performing power amplification and frequency multiplication in the millimeter wave band. As shown in the layout diagram of FIG. 2, the antenna 9 is provided outside the line 11 of the platform 10 provided in the station premises or above the line 11, and the millimeter wave is generated by the intermediate frequency signal sent from the amplifying unit 8. It irradiates the line 11 and the sky above it, receives a reflected wave from a reflective object such as a person or an object existing on the line 11 and an identification wave from the ID responder 3 and sends it to the amplifying unit 8. The amplifying unit 8 amplifies the reflected wave and the identification wave sent from the antenna 9 with low noise and sends them to the modulating / demodulating unit 7. The modulation / demodulation unit 7 mixes the reflected wave and the transmission wave received by the amplification unit 8 and obtains a beat signal including a distance component. The signal processing unit 6 samples the beat signal obtained by the modulation / demodulation unit 7 and performs digital conversion, and uses the spectrum analysis from the fast Fourier calculation to reflect each reflection from the spectrum data of the frequency and the received power intensity (reflection intensity). The reflection intensity from the object and the position of each reflecting object are calculated, and a maintenance person identification signal is generated from the identification wave sent from the modulation / demodulation unit 7.

  The antenna 9 of the sensor unit 3 is selected from a plurality of pencil beam antennas, a wide beam method for irradiating with a wide horizontal millimeter-wave beam width, or an electronic scan method for electronically switching a plurality of antennas. To do. As shown in the plan view of FIG. 3, the beam width in the horizontal direction of the millimeter wave irradiated from the antenna 9 irradiates the line 11 near the home 10 and the space above it with no gap.

The alarm control device 4 includes a determination processing unit 12, a storage unit 13, an ID recognition unit 14, an alarm communication unit 15, and an alarm output unit 16. The determination processing unit 12 stores the reflection intensity of the millimeter wave sent from the signal processing unit 6 of the sensor unit 3, the position of the reflective object, and the maintenance person identification signal in the storage unit 13. It is determined whether or not a reflective object exists on the track 11. The ID recognition unit 14 determines whether the reflective object existing on the track 11 is a fallen person or a maintenance person. The alarm communication unit 15 sends a warning transmission signal to the signal processing unit 6 of the sensor unit 3 when the ID recognition unit 14 determines that the reflecting object existing on the track 11 is a maintenance person. The alarm output unit 16 outputs an alarm signal to the alarm device 5 when the ID recognition unit 14 determines that the reflecting object existing on the track 11 is a fallen person. The alarm device 5 inputs an alarm signal output from the alarm output unit 15 and notifies a fallen person detection alarm .

  With reference to the flowchart of FIG. 4, processing when the fallen object detection device 1 of the faller identification apparatus detects whether the reflecting object existing on the track 11 is a fallen person or a maintenance person will be described.

  When the detection execution mode is set by the alarm control device 4, the signal processing unit 6 of the sensor unit 3 sends a transmission wave to the modulation / demodulation unit 7. The modulation / demodulation unit 7 modulates the frequency of the transmitted transmission wave and sends the intermediate frequency signal to the amplification unit 8. The amplifying unit 8 generates a millimeter wave by the transmitted intermediate frequency signal and irradiates the entire surface of the line 11 (step S1). This irradiated millimeter wave reflected wave and the maintenance person identification wave indicating the identification signal from the ID responder 2 possessed by the maintenance person are received by the antenna 9, and the received reflected wave and the maintenance person identification wave are reduced by the amplifier 8. The noise is amplified and sent to the modulation / demodulation unit 7 (step S2). The modulation / demodulation unit 7 generates a beat signal including a distance component from the received reflected wave and transmission wave, sends the beat signal to the signal processing unit 6, and sends a maintenance person identification wave to the signal processing unit 6. The signal processing unit 6 samples the beat signal sent to perform digital conversion, calculates the reflection intensity from each reflecting object and the position of each reflecting object, and sends them to the determination processing unit 12 of the alarm control device 4 as well as a maintenance person. A maintenance person identification signal is generated from the identification wave and sent to the determination processing unit 12 (step S3).

  The determination processing unit 12 records the transmitted reflection intensity from each reflecting object, the position of each reflecting object, and the maintenance person identification signal for each reflecting object in the storage unit 13 (step S4). This processing is repeated at a constant processing cycle, for example, a processing cycle of 100 milliseconds.

  Then, the determination processing unit 12 determines whether or not there is a reflecting object on the track 11 from the variation in the reflection intensity from each reflecting object and the position of the reflecting object (step S5). If the determination processing unit 12 determines that a reflective object is present on the track 11, the determination processing unit 12 sends a reflective object detection signal specifying the reflective object to the ID recognition unit 14. When the reflection object detection signal is sent, the ID recognition unit 14 determines whether or not the maintenance person identification signal corresponding to the reflection object is stored in the storage unit 13 (step S6), and the maintenance corresponding to the reflection object is performed. When the person identification signal is not stored, the reflecting object present on the track 11 is determined to be a fallen person, and the faller detection signal is sent to the alarm device 5 via the alarm output unit 16 and falls from the alarm device 5. A person alarm is notified (step S7).

  In addition, when the reflection object detection signal is transmitted and the maintenance person identification signal corresponding to the reflection object is stored in the storage unit 13, the ID recognition unit 14 selects the reflection object existing on the track 11 as the maintenance person. And a maintenance person recognition signal is sent to the alarm communication unit 15. When the maintenance person recognition signal is sent from the ID recognition unit 14, the warning communication unit 15 sends a warning transmission signal for urging the maintenance person to be alerted to the signal processing unit 6 of the sensor unit 3. When the warning transmission signal is transmitted, the signal processing unit 6 transmits a transmission wave including the warning from the antenna 9 onto the line 11 via the modulation / demodulation unit 7 and the amplification unit 8 (step S8). The ID responder 2 that has received the transmission wave issues an alarm to notify the maintenance person (step S9). This process is repeated until the detection process is completed (steps S10, S1 to S9).

  As described above, since the reflection object existing on the track 11 is automatically identified as a fallen person or a maintenance person, the fallen person can be detected at an early stage. In addition, since the fallen person and the maintenance person are surely identified, it is possible to prevent the maintenance person from being erroneously detected as a fallen person and to prevent the operation of the train from being hindered.

  In the above description, the case where the electromagnetic wave of the millimeter wave band is irradiated onto the line 11 from the sensor unit 3 has been described, but the electromagnetic wave of the microwave band may be used.

It is a block diagram which shows the structure of the fallen object detection apparatus of this invention. It is a perspective view which shows arrangement | positioning of an antenna. It is a top view which shows the irradiation area | region of the millimeter wave irradiated from an antenna. It is a flowchart which shows a fallen object identification process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1; Obstacle detection apparatus, 2; ID responder, 3; Sensor part, 4; Alarm control apparatus,
5; alarm device, 6; signal processing unit, 7; modulation / demodulation unit, 8; amplification unit, 9; antenna,
10; Home, 11; Track, 12; Determination processing unit, 13; Storage unit, 14; ID recognition unit,
15: Alarm communication unit, 16: Alarm output unit.

Claims (3)

An obstacle detection device and an ID responder,
The ID responder is carried by a maintenance person who works near the track, and transmits an identification signal indicating that it is a maintenance person using electromagnetic waves,
The obstacle detection device has a sensor unit, an alarm control device and an alarm device,
The sensor unit irradiates an electromagnetic wave on a track near the home, receives a reflected wave from a reflective object existing on the track and a maintenance person identification wave from the ID responder, and reflects and reflects the reflection intensity and reflection of each reflective object. Detect the position of the object, generate a maintenance person identification signal,
The alarm control device includes a determination processing unit, a storage unit, and an ID recognition unit, and the determination processing unit stores a reflection object and a maintenance person identification signal output from the sensor unit in the storage unit, and reflects the reflection intensity. It is determined whether there is a reflecting object on the track based on the fluctuation and the position of the reflecting object, and when the ID recognition unit determines that the reflecting object exists on the track, the memory It is determined whether or not the maintenance person identification signal is stored in the section, and when the maintenance person identification signal is not stored, the reflection object existing on the track is determined as a fallen person and an alarm signal is sent to the alarm device. fall identifying apparatus, characterized in that for informing an alarm output.   The alarm control device includes an alarm communication unit, and when the ID recognition unit determines that a reflecting object is present on the track by the determination processing unit, a maintenance person identification signal is stored in the storage unit. When the maintenance person identification signal is stored, the reflection object present on the track is determined as a maintenance person and a maintenance person recognition signal is sent to the warning communication part, and the warning communication part is The fallen person identification device according to claim 1, wherein when a maintenance person recognition signal is sent from the ID recognition unit, a warning signal is sent to the sensor unit, and the sensor unit transmits a transmission wave including the warning signal on the track.   The fallen object identification device according to claim 1, wherein the sensor unit irradiates electromagnetic waves in a millimeter wave band or a microwave band.

Images