Platform door obstacle active detection system and method

Abstract

The present invention discloses an active detection system and method for platform door obstacles, which solves the problem that the current detection equipment has a large detection blind area and cannot realize effective detection of various working conditions, and avoids the problem of people being pinched by the platform door due to the large blind area; the technical scheme comprises: a detection scanning device, a signal processing device, a drive control device and a host computer; the detection scanning device is connected to the drive control device through a communication line, a multi-channel output controller is provided in the drive control device, the drive control device is connected to the signal processing device through a communication line, and the signal processing device is connected to the host computer through a communication line; the laser probe in the detection scanning device is installed on a drive bracket, the drive bracket is connected to the drive shaft of the drive motor, the drive motor is installed above the platform door through a fixed bracket, and the laser probe rotates with the drive shaft of the drive motor as the center of a circle.

Description

Technical Field

[0001] The present invention belongs to the technical field of rail transit, and in particular relates to a platform door obstacle active detection system and method. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] At present, especially as autonomous driving technology gradually matures and is rapidly promoted and applied, since there is no driver on the lookout in autonomous driving, passengers are at a greater risk of being trapped by electric car doors and platform doors when crowded.

[0004] Patent No. CN101236259B in the prior art discloses an anti-pinch device for platform screen doors of urban rail transit, including a sliding door of the screen door and an obstacle detection system. The sliding door is provided with a safety stopper extending toward the track on the track side, and a pressure sensor is provided below the safety stopper. The pressure sensor needs to contact an obstacle to enable the pressure sensor to collect a signal, and the position of the obstacle is not fixed. Therefore, the passive detection in the prior art not only has a large detection blind spot but also many false alarms, which can easily lead to the problem that pinching of people and objects cannot be reliably detected. Summary of the invention

[0005] In response to the above problems, the present invention provides a system and method for active detection of obstacles at platform doors. By using a fan-shaped scanning area of ​​a detection scanning device, two-dimensional scanning of a laser probe is achieved, the detection area is increased, and the problem that current detection equipment has a large blind area and cannot achieve effective detection of various working conditions is solved, thereby avoiding the problem of people being pinched by platform doors due to excessive blind areas.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In the first aspect, the present invention provides an active detection system for platform door obstacles, comprising: a detection and scanning device, a signal processing device, a drive control device and a host computer; the detection and scanning device is connected to the drive control device via a communication line, and a multi-channel output controller is provided in the drive control device, the drive control device is connected to the signal processing device via a communication line, and the signal processing device is connected to the host computer via a communication line; the detection and scanning device comprises a laser probe, a drive motor and a fixed bracket, and the laser probe is provided with a drive bracket; the front and rear sides of the drive bracket are provided with mounting holes, and the mounting holes are used to connect the drive shaft of the drive motor, the lower end of the drive bracket is the laser probe window, and the laser probe is installed, and a communication line wiring compartment is provided on one side of the laser probe; the drive motor is installed above the platform door through a fixed bracket, and the laser probe rotates with the drive shaft of the drive motor as the center, so that the scanning area of ​​the detection and scanning device is fan-shaped.

[0008] Furthermore, the multi-channel output controller is also connected to the laser probe and the driving motor respectively.

[0009] Furthermore, the scanning frequency of the laser probe is adjustable within a frequency range of 10-50 Hz, and the scanning distance of the laser probe is adjustable within a distance range of 1-12000 mm.

[0010] Furthermore, the detection and scanning device is provided with an independent communication address.

[0011] Furthermore, the drive control device is also provided with a touch screen, a reset button, and a buzzer. The touch screen has a human-computer interaction function, and the touch screen screen adopts a nested structure.

[0012] Furthermore, the signal processing device is a single chip microcomputer, and the signal processing device is also connected to the platform door controller and the electric passenger door controller respectively, so as to control the linkage between the platform door and the electric passenger door.

[0013] Furthermore, the drive control device is provided with an SD card for storing data collected by the detection and scanning device, including specific time, specific location, real-time distance, and door opening status; the signal processing device is also provided with a standard interface of the subway comprehensive monitoring system for realizing comprehensive scheduling and management of the subway.

[0014] In a second aspect, the present invention further provides a detection method of an active detection system for platform door obstacles, including: after the platform door controller sends a platform door closing and locking signal, the platform door controller transmits the platform door closing and locking signal to the single-chip microcomputer through a communication line, the single-chip microcomputer controls the driving control device to drive the detection scanning device to work, and when an obstacle is found, a signal of detecting an obstacle is sent to the signal processing device, the signal processing device generates an alarm signal and transmits it to the driving control device, the buzzer sends a buzzer alarm, the alarm signal sent by the signal processing device is sent to the platform door controller, the platform door controller drives the platform door to pop open, and then realizes the function of prohibiting the moving train; when no obstacle is found, a signal of detecting no obstacle is sent to the signal processing device, the signal processing device sends a signal of no obstacle to the platform door controller, so that the platform door closes normally and the electric passenger car runs normally;

[0015] When the obstacle is removed, the staff manually presses the reset button to release the alarm signal.

[0016] Furthermore, the scanning distance, scanning time and scanning angle of the laser probe are set by the drive control device according to the actual needs of the platform door; the number of scans of the gap between the electric passenger car door and the platform door by the laser probe is set by the drive control device, and the number of scans is set to at least twice, the duration of one scan is 1 second, and the interval between two scans is 1 second.

[0017] Furthermore, the signal processing device sends the alarm signal to the host computer and transmits the detailed information to the subway integrated monitoring system.

[0018] Compared with the prior art, the present invention has the following advantages and positive effects:

[0019] The drive control device of the present invention has a multi-channel output controller that can control the operation of the laser probe and the drive motor. The drive bracket is connected to the drive shaft of the drive motor. The laser probe rotates with the drive shaft of the drive motor as the center, thereby making the scanning area of ​​the detection and scanning device fan-shaped, realizing two-dimensional scanning of the laser probe, increasing the detection area, and avoiding the problem of people being pinched by the platform door due to excessive blind spots.

[0020] The present invention adopts a laser probe scanning method, which has strong anti-interference ability and long scanning distance. The scanning frequency of the laser probe is adjustable, and the scanning distance of the laser probe is adjustable, which can meet different on-site needs. Each laser probe has an independent communication address, which can accurately report the location of obstacles, making it convenient for station staff to deal with them in time.

[0021] The drive control device of the present invention can centrally control the drive motor speed and the laser probe according to the communication address, and its parameters can be adjusted through the output controller. After the signal processing device sends a detection start signal, the detection and scanning devices on the entire side will operate simultaneously. The touch screen can perform human-computer interaction and can display the station name, time, platform door position number, and the door status corresponding to the detection result. The detection distance of the laser probe can also be set, and the reset button is used to reset the buzzer alarm.

[0022] The signal processing device of the present invention is connected to the platform door controller, and sends a signal to the platform door controller to open the platform door when an obstacle is found; it can upload abnormal status to the SD card of the drive control device in the form of events, including key data, which is convenient for historical data tracking and event tracing, equipment maintenance and event analysis; it has a standard interface for the subway comprehensive monitoring system, which can realize comprehensive scheduling and management. It can alarm in time during work, send an alarm signal to the platform door controller to make the platform door pop open to realize the function of prohibiting the moving train, and also transmit information to the host computer and the subway comprehensive monitoring system, so that the staff can understand the situation and take measures to ensure the safety of passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0024] Figure 1 This is a connection diagram of the active detection system of the present invention;

[0025] Figure 2 It is a schematic diagram of the laser probe of the present invention;

[0026] Figure 3 This is a schematic diagram of the installation position of the laser probe of the present invention;

[0027] Figure 4 It is a detection flow chart of the active detection system of the present invention.

[0028] In the figure: 1. signal processing device; 2. drive control device; 3. drive bracket; 4. drive motor; 5. host computer; 6. communication line; 7. fixed bracket; 8. fixed hole; 9. laser probe; 10. communication line wiring compartment; 11. platform door. DETAILED DESCRIPTION

[0029] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0031] This embodiment discloses a platform door obstacle active detection system, such as Figure 1-Figure 3 As shown, it includes a detection scanning device, a signal processing device 1, a drive control device 2 and a host computer 5; the detection scanning device is connected to the drive control device 2 through a communication line 6, the drive control device 2 is connected to the signal processing device 1 through a communication line 6, and the signal processing device 1 is connected to the host computer 5 through a communication line 6; the detection scanning device includes a laser probe 9, a drive motor 4 and a fixed bracket 7, the laser probe 9 is provided with a drive bracket 3, the drive bracket 3 is connected to the drive shaft of the drive motor 4, the drive motor 4 is installed above the platform door 11 through the fixed bracket 7, the laser probe 9 rotates with the drive shaft of the drive motor 4 as the center, so that the scanning area of ​​the detection scanning device is fan-shaped.

[0032] The detection and scanning device adopts a detection method of laser probe 9 scanning. Fixing holes 8 are provided on both sides of the laser probe. A laser transmitter 12 and a laser receiver 13 are provided on the laser probe. The detection method of laser probe 9 scanning has strong anti-interference ability and a long scanning distance. The scanning frequency of the laser probe 9 is adjustable, and the frequency range is between 10-50HZ. The scanning distance of the laser probe 9 is adjustable, and the distance range is between 1-12000mm, which can meet the needs of different sites. Each of the laser probes 9 is provided with an independent communication address. When the laser probe 9 finds an obstacle and alarms, the specific location of the obstacle can be accurately reported, which is convenient for station staff to go to deal with it in the first time and improve work efficiency. The front and rear sides of the driving bracket 3 are provided with mounting holes, and the mounting holes are used to connect the driving shaft of the driving motor 4. The lower end of the driving bracket is the laser probe window, and a laser probe is installed. A communication line wiring compartment 10 is provided on one side of the laser probe.

[0033] The drive control device 2 is provided with a multi-channel output controller, which is also connected to the laser probe 9 and the drive motor 4 respectively, and can control the operation of the laser probe 9 and the drive motor 4 according to the instructions of the signal processing device 1. The laser probe 9 can scan obstacles in the length direction. At the same time, the drive motor 4 is controlled by the output controller, so that the drive motor 4 drives the laser probe 9 on the drive bracket to rotate, thereby realizing the two-dimensional scanning of the laser probe 9, increasing the detection area of ​​the laser probe 9, and avoiding the problem of accidental clamping of the platform door 11 due to the large blind area. In this embodiment, a 16-channel output controller is selected, which can simultaneously control the detection and scanning device to complete the scanning of 16 doors, and the whole side door can be completed with two drive controllers. The drive control device 2 has the function of centrally controlling the speed of the drive motor 4 and the laser probe 9 in the detection and scanning device according to the communication address, and the parameters of the drive motor 4 and the laser probe 9 can be adjusted through the output controller. After the signal processing device 1 sends a detection start signal, the detection and scanning device of the whole side acts simultaneously under the control of the drive control device 2.

[0034] The drive control device 2 is also provided with a touch screen, a reset button and a buzzer. The touch screen has a human-computer interaction function. The touch screen screen adopts a nested structure for displaying the station name, time, platform door 11 position number, and the door status display corresponding to the detection result. At the same time, the detection distance of the laser probe 9 can also be set; the reset button is used to reset the alarm of the buzzer.

[0035] The signal processing device 1 is a single chip microcomputer, which is also connected to the platform door 11 controller and the electric passenger door controller respectively, and is used to control the linkage between the platform door 11 and the electric passenger door, so that the platform door 11 and the electric passenger door can be opened and closed at the same time; the single chip microcomputer is used to collect the signal of the laser probe 9, perform data calculation and processing, and control the output controller. After receiving the detection signal of the laser probe 9, the signal processing device 1 immediately judges the detection signal. When the judgment result is that there is an obstacle, it sends a signal to the platform door 11 controller to open the platform door 11; an SD card is provided on the drive control device 2, and the signal processing device 1 will upload the abnormal state to the SD card of the drive control device 2 in the form of an event. The event mainly includes key data such as specific time, specific location, real-time distance, door opening action status, etc., which is convenient for historical data tracking and event tracing, and also convenient for equipment maintenance and event analysis; the signal processing device 1 is also provided with a standard interface of the subway comprehensive monitoring system to realize the comprehensive dispatching and management of the subway. When working, it can give an alarm in time, send an alarm signal to the platform door 11 controller to make the platform door 11 pop open to realize the function of prohibiting the moving train, and also transmit information to the host computer 5 and the subway integrated monitoring system, so that the staff can understand the situation and take measures to ensure the safety of passengers.

[0036] Working method:

[0037] After the platform door 11 controller sends a signal for closing and locking the platform door 11, the platform door 11 controller transmits the signal for closing and locking the platform door 11 to the single chip microcomputer through the communication line 6, and the single chip microcomputer controls the drive control device 2 to drive the detection and scanning device to work. When an obstacle is found, a signal of detecting an obstacle will be sent to the single chip microcomputer, and the single chip microcomputer will generate an alarm signal and transmit it to the drive control device 2, and the buzzer will sound a buzzer alarm, and the alarm signal sent by the single chip microcomputer will be sent to the platform door 11 controller, and the platform door 11 controller will drive the platform door 11 to pop open, thereby realizing the function of prohibiting the moving train; when the obstacle is removed, the staff manually presses the reset button to release the alarm signal; when no obstacle is found, a signal of detecting no obstacle will be sent to the signal processing device 1, and the signal processing device 1 will send the signal of no obstacle to the platform door 11 controller, so that the platform door 11 closes normally and the electric passenger car runs normally; the detection process of the active detection system is as follows Figure 4 shown.

[0038] The scanning distance, scanning duration and scanning angle of the laser probe 9 are set by the drive control device 2 according to the actual needs of the platform door 11; the number of scans of the gap between the electric passenger car door and the platform door 11 by the laser probe 9 is set by the drive control device 2, and the number of scans is set to at least twice, the duration of one scan is 1 second, and the interval between two scans is 1 second.

[0039] The single chip microcomputer sends an alarm signal to the host computer 5, and transmits detailed information to the subway integrated monitoring system; so that all staff can understand the on-site situation at the first time, see the specific location of the obstacle and other information, so as to quickly take corresponding disposal measures to ensure the safety of passengers.

[0040] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A platform door obstacle active detection system, characterized in that: include: Detection scanning device, signal processing device, drive control device and host computer; The detection scanning device is connected to the drive control device through a communication line, and a multi-channel output controller is provided in the drive control device. The drive control device is connected to the signal processing device through a communication line, and the signal processing device is connected to the host computer through a communication line; the detection scanning device includes a laser probe, a drive motor and a fixed bracket, and the laser probe is provided with a drive bracket; the front and rear sides of the drive bracket are provided with mounting holes, and the mounting holes are used to connect the drive shaft of the drive motor; the lower end of the drive bracket is the laser probe window, and the laser probe is installed, and a communication line wiring compartment is provided on one side of the laser probe; the drive motor is installed above the platform door through a fixed bracket, and the laser probe rotates with the drive shaft of the drive motor as the center, so that the scanning area of ​​the detection scanning device is fan-shaped.

2. The platform door obstacle active detection system according to claim 1, characterized in that: The multi-channel output controller is also connected to the laser probe and the driving motor respectively.

3. The platform door obstacle active detection system according to claim 1, characterized in that: The scanning frequency of the laser probe is adjustable, and the frequency range is between 10-50HZ. The scanning distance of the laser probe is adjustable, and the distance range is between 1-12000mm.

4. The platform door obstacle active detection system as claimed in claim 3, characterized in that: The detection and scanning device is provided with an independent communication address.

5. The platform door obstacle active detection system according to claim 4, characterized in that: The drive control device is also provided with a touch screen, a reset button, and a buzzer. The touch screen has a human-computer interaction function, and the touch screen screen adopts a nested structure.

6. The platform door obstacle active detection system according to claim 1, characterized in that: The signal processing device is a single chip microcomputer, and the signal processing device is also connected to the platform door controller and the electric passenger door controller respectively, and is used to control the linkage between the platform door and the electric passenger door.

7. The platform door obstacle active detection system according to claim 6, characterized in that: The drive control device is provided with an SD card for storing data collected by the detection and scanning device, including specific time, specific location, real-time distance, and door opening action status; the signal processing device is also provided with a standard interface of the subway comprehensive monitoring system for realizing comprehensive scheduling and management of the subway.

8. A detection method for a platform door obstacle active detection system as claimed in any one of claims 2 to 7, characterized in that: include: After the platform door controller sends out a platform door closing and locking signal, the platform door controller transmits the platform door closing and locking signal to the single-chip microcomputer through the communication line, and the single-chip microcomputer controls the driving control device to drive the detection and scanning device to work. When an obstacle is found, a signal of an obstacle is detected and sent to the signal processing device, and the signal processing device generates an alarm signal and transmits it to the driving control device. The buzzer sounds a buzzer alarm, and the alarm signal sent by the signal processing device is sent to the platform door controller, and the platform door controller drives the platform door to pop open, thereby realizing the function of prohibiting the moving train; when no obstacle is found, a signal of no obstacle is detected and sent to the signal processing device, and the signal processing device sends a no obstacle signal to the platform door controller, so that the platform door closes normally and the electric passenger car runs normally; When the obstacle is removed, the staff manually presses the reset button to trigger the alarm signal.

9. The detection method of the platform door obstacle active detection system according to claim 8, characterized in that: The scanning distance, scanning time and scanning angle of the laser probe are set by the drive control device according to the actual needs of the platform door; the number of scans of the gap between the electric passenger car door and the platform door by the laser probe is set by the drive control device, and the number of scans is set to at least twice, the duration of one scan is 1 second, and the interval time for scanning on both sides is 1 second.

10. The detection method of the platform door obstacle active detection system according to claim 8, characterized in that: The signal processing device sends the alarm signal to the host computer and transmits the detailed information to the subway integrated monitoring system.

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