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JP-2026075968-A - Collision detection system

JP2026075968AJP 2026075968 AJP2026075968 AJP 2026075968AJP-2026075968-A

Abstract

[Problem] To provide a collision detection system capable of detecting a collision when an object collides with a moving train. [Solution] The system includes a microphone A installed at the front of the train 1, and a collision detection unit that determines whether an object will collide with the moving train 1 based on the sound acquired by the microphone A. [Selection Diagram] Figure 2

Inventors

  • 池口 信行
  • 竹村 孝司
  • 服部 大志

Assignees

  • 西日本旅客鉄道株式会社

Dates

Publication Date
20260511
Application Date
20241023

Claims (11)

  1. A microphone installed at the front of the train, A collision detection system comprising: a collision detection unit that determines whether an object is colliding with a moving train based on sound acquired by the aforementioned microphone.
  2. The train includes a running control unit that controls the movement of the aforementioned train, The collision determination unit determines that an object has collided with the moving train when the microphone acquires a collision sound that indicates the object collided with the moving train and whose sound pressure is above a predetermined determination threshold. The aforementioned train control unit automatically stops the train if the sound pressure of the collision sound acquired by the microphone is above a predetermined stopping threshold. The collision determination system according to claim 1, wherein the stop threshold is higher than the determination threshold.
  3. The system comprises multiple microphones arranged at different positions from each other, The collision determination system according to claim 2, wherein the running control unit automatically stops the train when the collision sound is acquired by at least one of the plurality of microphones with a sound pressure equal to or greater than the stop threshold.
  4. The collision detection system according to claim 2, further comprising a threshold changing unit that changes at least one of the judgment threshold and the stop threshold according to the train's speed.
  5. The collision determination system according to claim 2, further comprising a threshold changing unit that changes at least one of the judgment threshold and the stop threshold according to the travel section.
  6. The collision detection system according to claim 1, further comprising a collision detection unit that identifies the collision location when the collision detection unit determines that the object has collided with the train while it is in motion.
  7. The collision determination system according to claim 6, wherein the identifying unit identifies the collision location based on whether or not the sound acquired by the microphone contains sound within a predetermined frequency band.
  8. The system comprises multiple microphones arranged at different positions from each other, The collision determination unit determines that an object has collided with the moving train when the microphone acquires a collision sound that indicates the object collided with the moving train and whose sound pressure is above a predetermined determination threshold. The collision determination system according to claim 6, wherein the identifying unit identifies the collision location based on which microphone acquired the collision sound.
  9. The collision determination system according to claim 6, further comprising a collision location notification unit that notifies the collision location identified by the specified unit.
  10. The system comprises multiple microphones arranged at different positions from each other, The aforementioned plurality of microphones include a first microphone and a second microphone, The first microphone has a directivity towards the front of the train, The second microphone has a directivity directed upwards towards the train. The front of the aforementioned train is provided with a window that opens upwards. The collision detection system according to claim 1, wherein the second microphone is positioned below the window.
  11. A collision determination system according to any one of claims 1 to 10, further comprising an object collision notification unit that notifies the collision of an object when the collision determination unit determines that the object has collided with the train while it is in motion.

Description

This invention relates to a collision detection system. A system for controlling train movement is already known, for example, the one described in Patent Document 1. In this system, the presence or absence of obstacles within the monitoring area is determined based on an image taken of the area in front of the train. If an obstacle is determined to be within the monitoring area, a brake command is output. Japanese Patent Publication No. 2019-181996 This is a block diagram showing the configuration of a train and a collision detection system.This is a side view showing the configuration of the front section of the train.This is a graph showing the judgment threshold, etc.This is a flowchart of the collision detection flow.This is a flowchart of the stop decision flow.This is a flowchart of the microphone selection flow.This is a flowchart of the collision location identification process.This is a flowchart of the microphone identification flow in the first alternative embodiment. The embodiments for carrying out the present invention will be described based on the drawings. [Train composition] As shown in Figure 1, train 1 is equipped with an operating unit 2, a running control unit 3, a drive unit 4, and a braking unit 5. The operating unit 2 is located in the driver's cab 10 shown in Figure 2. The operating unit 2 accepts manual operation by the train operator. As shown in Figure 1, the operation unit 2 sends a signal corresponding to the received human operation to the running control unit 3. The running control unit 3 controls the drive unit 4 and the brake unit 5 according to this signal. The drive unit 4 is a device that drives (accelerates) the train 1 by controlling, for example, a running motor (not shown) provided on the train 1. The brake unit 5 is a device that brakes (decelerates) the train 1 by controlling, for example, a running motor (not shown) provided on the train 1. In this way, the running control unit 3 controls the movement of the train 1. With the configuration described above, train 1 can be manually operated by human intervention using the control unit 2. However, the present invention is not limited to this. Train 1 may be capable of both manual and automatic operation, or it may be capable of automatic operation only, or it may be capable of manual operation only. When train 1 is operating automatically, for example, the running control unit 3 may acquire various information (for example, information indicating the speed and position of train 1) and automatically control the drive unit 4 and brake unit 5 based on that information. Figure 2 shows the leading car 6 of train 1. The leading car 6 is located at the front (particularly the front end) of train 1. In this specification, the direction of travel of train 1 is "front," and the opposite direction is "rear." The aforementioned driver's cab 10 is located at the front end of the leading car 6. The leading car 6 has a frame 7, a coupler cover 8, a snowplow 9, a bonnet 11, a driver's seat 12, and windows 13. The space within the leading car 6 is divided vertically by the horizontally positioned frame 7. Above the frame 7 are the driver's cab 10 and the passenger compartment (not shown). The space below the frame 7 is for equipment and other fittings. The top surface of the frame 7 is the floor. The coupler cover 8 is a cover that covers the coupler (not shown) of the leading car 6. The obstacle deflector 9 is a device that removes obstacles on the tracks while the train 1 is in motion. The coupler cover 8 and the obstacle deflector 9 are installed at the front end of the leading car 6. The hood 11 is located in front of the driver's seat 12. The hood 11 houses various equipment. The driver's seat 12 is located behind the control panel 2 in the driver's cab 10. The driver can operate the control panel 2 while seated in the driver's seat 12. Window 13 is located above the bonnet 11. Window 13 opens upwards. That is, a window 13 opening upwards is provided at the front of train 1. Window 13 is fitted with a plate-shaped pane of glass. The driver, while seated in the driver's seat 12, can view the exterior of the leading car 6 (particularly the front and upper sides) through the window 13. Train 1 is equipped with a collision detection system S (see Figure 1) that determines whether an object will collide with train 1 while it is in motion. The collision detection system S will be described below. [Configuration of the collision detection system] As shown in Figure 1, the collision detection system S is equipped with multiple microphones A capable of detecting (acquiring) sound. In this embodiment, three microphones A are provided: a first microphone 21, a second microphone 22, and a third microphone 23. That is, the multiple microphones A include the first microphone 21 and the second microphone 22. However, the present invention is not limited thereto. The number of microphones A provided may be one, two, or four or more. As shown