Detection device and system for metro platform door gap

Abstract

The utility model relates to a subway platform door gap detection device and system.The detection device is connected with a corresponding radar detector, and the radar detector is arranged in a corresponding platform door area and used for scanning a gap between a train and a platform door; the detection devices corresponding to the platform doors are sequentially connected in series through the communication loop and the safety loop and connected with the control cabinet. The detection device comprises a control module and an input and output module which are connected with each other; the control module is used for sending a scanning starting signal to the corresponding radar detector based on the received subway door state signal, and receiving point cloud data generated by scanning of the radar detector; generating result data based on the point cloud data, and sending the result data to a control cabinet; and outputting an on-off control signal based on the result data, the input and output module is used for controlling the safety circuit to be switched on or switched off based on the on-off control signal, and the problems that dead zones exist in platform door gap detection, and missing report and false report are likely to occur are solved.

Description

Technical Field

[0001] This utility model relates to the field of rail transit technology, and in particular to a detection device and system for the gap between subway platform doors. Background Technology

[0002] Platform screen doors (PSM) have gradually become a standard feature in subway construction due to their energy-saving and safety advantages. Simultaneously, with the advancement of driverless subway systems in China, the requirements for operational efficiency and reliability of PSM systems are becoming increasingly stringent. Traditional subway platform screen door gap detection methods employ infrared beams and laser beams, detecting multiple sliding door units as a single detection zone, with 1-3 beams of light in each zone. This method utilizes the principle of rectilinear propagation of light for point-to-point detection, determining the presence of obstacles by whether the light is blocked. However, this method cannot achieve comprehensive scanning coverage, has significant blind spots, requires high installation precision, and is prone to false alarms and missed detections due to vibrations and light polarization caused by subway operation. Utility Model Content

[0003] In view of this, it is necessary to provide a detection device and system for the gap between subway platform doors to solve the problem that the existing technology has blind spots in the detection of platform door gaps, which easily leads to missed or false alarms.

[0004] Firstly, this embodiment provides a detection device for the gap between subway platform doors. The detection device is connected to a corresponding radar detector, which is set in the corresponding platform door area to scan the gap between the train and the platform door. The detection devices corresponding to each platform door are connected in series with the control cabinet through a communication circuit and a safety circuit. The detection device includes an interconnected control module and an input / output module.

[0005] The control module is used to send a scan start signal to the corresponding radar detector based on the received subway door status signal, and to receive the point cloud data generated by the radar detector scanning; it is also used to generate result data based on the point cloud data and send the result data to the control cabinet; and it is also used to output an on / off control signal based on the result data.

[0006] The input / output module is used to control the safety circuit to be turned on or off based on the on / off control signal.

[0007] In a further embodiment, the input / output module includes at least one input conversion circuit, at least one output conversion circuit, and at least one relay control circuit connected to the control module.

[0008] The input conversion circuit is used to perform isolated level conversion on the input signal and then send it to the control module;

[0009] The output conversion circuit is used to perform isolated level conversion on the output signal sent by the control module before outputting it.

[0010] The relay control circuit includes a relay connected to the safety circuit. The relay switches based on the on / off control signal to control the safety circuit to be turned on or off.

[0011] In a further embodiment, the relay control circuit further includes a first optocoupler, resistors R3, R5, R8, R18, transistor Q1, and MOSFET MQ1.

[0012] The on / off control signal is connected to one end of resistor R3. The other end of resistor R3 is connected to one end of resistor R5 and the base of transistor Q1. The other end of resistor R5 and the emitter of transistor Q1 are grounded. The collector of transistor Q1 is connected to one end of resistor R8. The other end of resistor R8 is connected to the second end of the first optocoupler. The first end of the first optocoupler is connected to the first power supply terminal. The third end of the first optocoupler is connected to the second power supply terminal. The fourth end of the first optocoupler is connected to one end of resistor R18. The other end of resistor R18 is connected to the gate of MOSFET MQ1. The drain of MOSFET MQ1 is connected to the first terminal of the relay. The source of MOSFET MQ1 is grounded. The sixth terminal of the relay is connected to the third power supply terminal. The second and third terminals of the relay are connected to the safety circuit.

[0013] In a further embodiment, the output conversion circuit includes a second optocoupler, resistors R36, R41, R44, R47, R50, R21, transistor Q5, MOSFET MQ5, and light-emitting diode LED7.

[0014] The output signal is connected to one end of resistor R36. The other end of resistor R36 is connected to one end of resistor R41 and the base of transistor Q5. The other end of resistor R41 and the emitter of transistor Q5 are grounded. The collector of transistor Q5 is connected to one end of resistor R44. The other end of resistor R44 is connected to the second end of the second optocoupler. The first end of the second optocoupler is connected to the first power supply terminal. The third end of the second optocoupler is connected to the second power supply terminal. The fourth end of the second optocoupler is connected to one end of resistor R47 and one end of resistor R50. The other end of resistor R47 is grounded. The other end of resistor R50 is connected to the gate of MOSFET MQ5. The drain of MOSFET MQ5 is the output terminal of the output conversion circuit and is connected to the negative terminal of LED7. The source of MOSFET MQ5 is grounded. The positive terminal of LED7 is connected to one end of resistor R21. The other end of resistor R21 is connected to the third power supply terminal.

[0015] In a further embodiment, the input conversion circuit includes a third optocoupler, resistors R9, R15, R24, and a light-emitting diode LED8.

[0016] The input signal is connected to the first terminal of the third optocoupler and to one end of the resistor R24. The other end of the resistor R24 ​​is connected to the positive terminal of the light-emitting diode LED8. The negative terminal of the light-emitting diode LED8 is grounded. The second terminal of the third optocoupler is connected to one end of the resistor R9. The other end of the resistor R9 is grounded. The third terminal of the third optocoupler is the output terminal of the input conversion circuit and is connected to the VCC power supply terminal through the resistor R15. The fourth terminal of the third optocoupler is grounded.

[0017] In a further embodiment, the control module includes a first communication circuit, a controller, and a second communication circuit connected in sequence. The first communication circuit is connected to a corresponding radar detector, and the second communication circuit is connected to the communication loop.

[0018] The first communication circuit includes an Ethernet port circuit and a super Ethernet port circuit connected to the controller;

[0019] The second communication circuit includes a first CAN bus circuit and a second CAN bus circuit connected to the controller.

[0020] In a further embodiment, the Ethernet port circuit includes an Ethernet controller, a crystal oscillator, a port connector, resistors R92, R93, R94, R99, R100, R107, R108, R109, R110, and capacitors C34, C35, C42, C43, and C40.

[0021] The SCSn, SCLK, MISO, MOSI, INTn, and RSTn terminals of the Ethernet controller are connected to the controller; the SCSn terminal is connected to one end of the resistor R92, the INTn terminal is connected to one end of the resistor R93, the RSTn terminal is connected to one end of the resistor R94, and the other ends of the resistors R92, R93, and R94 are connected to the VCC power supply terminal.

[0022] The first clock terminal of the Ethernet controller is connected to one end of the resistor R99, the first terminal of the crystal oscillator, and one end of the capacitor C35. The other end of the resistor R99 is connected to the second clock terminal of the Ethernet controller and one end of the resistor R100. The other end of the resistor R100 is connected to the second terminal of the crystal oscillator and one end of the capacitor C34. The other ends of the capacitors C34 and C35 are grounded.

[0023] The TXN terminal of the Ethernet controller is connected to the TD- terminal of the network port connector, the TXP terminal of the Ethernet controller is connected to the TD+ terminal of the network port connector, the RXN terminal of the Ethernet controller is connected to the RD- terminal of the network port connector through capacitor C42, and the RXP terminal of the Ethernet controller is connected to the RD+ terminal of the network port connector through capacitor C43; the LINKLED terminal of the Ethernet controller is connected to the GRE- terminal of the network port connector, and the ACTLED terminal of the Ethernet controller is connected to the YEL- terminal of the network port connector.

[0024] The RXP terminal is connected to one end of the resistor R109, the RXN terminal is connected to one end of the resistor R110, and the other ends of the resistors R109 and R110 are grounded through the capacitor C40; the TXN terminal is connected to one end of the resistor R108, the TXP terminal is connected to one end of the resistor R107, and the other ends of the resistors R108 and R107 are connected to the VCC power supply terminal.

[0025] In a further embodiment, the super Ethernet circuit includes a serial port converter, capacitors C9 and C10. The RXD and TXD terminals of the serial port converter are connected to the controller. The VDD terminal of the serial port converter is connected to one end of capacitors C9 and C10, and the other end of capacitors C9 and C10 is connected to the GND terminal of the serial port converter and grounded.

[0026] In a further embodiment, the detection device corresponding to each platform screen door is also connected to the bypass switch corresponding to each platform screen door.

[0027] The bypass switch is used to send a bypass signal to the detection device in the event of a malfunction in the corresponding radar detector. Based on the bypass signal, the detection device disconnects from the radar detector and controls the safety circuit to be turned on.

[0028] Secondly, this embodiment provides a detection system for the gap between subway platform doors. The detection system includes a control cabinet, multiple radar detectors corresponding to multiple platform doors, multiple detection devices for the gap between subway platform doors as described in the first aspect, and multiple bypass switches. The detection devices are connected one-to-one with the radar detectors and the bypass switches. The control cabinet and the multiple detection devices are connected in series through communication circuits and safety circuits.

[0029] This utility model discloses a detection device for platform screen door gaps. By connecting to a corresponding radar detector, which is installed in the corresponding platform screen door area, the device generates point cloud data through laser scanning. The radar detector for each platform screen door enables comprehensive, blind-spot-free detection of the gaps and rapid obstacle location. The detection device is connected to a control cabinet via a communication circuit and a safety circuit in series. Each detection device for each platform screen door acquires the detection result based on the corresponding point cloud data and outputs an on / off control signal. This signal controls the safety circuit to be turned on or off. The safety circuit is disconnected when an obstacle is detected. This solves the problem of blind spots in platform screen door gap detection, which easily leads to missed or false alarms, thus improving the safety of subway operation and meeting the requirements for intelligent subway operation. Attached Figure Description

[0030] Figure 1 This is a schematic diagram showing the connection between the subway platform door gap detection device, radar detector, and control cabinet in some embodiments of this application;

[0031] Figure 2 This is a schematic diagram showing the connection between the bypass switch and the detection device in some embodiments of this application;

[0032] Figure 3 This is a schematic diagram showing the connection between the input / output module and the control module in some embodiments of this application;

[0033] Figure 4 This is a circuit connection diagram of the relay control circuit of some embodiments of this application;

[0034] Figure 5 This is a circuit connection diagram of the output conversion circuit of some embodiments of this application;

[0035] Figure 6 This is a circuit connection diagram of the input conversion circuit of some embodiments of this application;

[0036] Figure 7 This is a schematic diagram of the structure of the control module in some embodiments of this application;

[0037] Figure 8 This is a circuit connection diagram of the Ethernet port circuit of some embodiments of this application;

[0038] Figure 9 This is a circuit connection diagram of the super Ethernet port circuit of some embodiments of this application;

[0039] Figure 10 This is a circuit connection diagram of the first CAN bus circuit of some embodiments of this application;

[0040] Figure 11 This is a circuit connection diagram of the EEPROM memory in some embodiments of this application;

[0041] Figure 12 This is a circuit connection diagram of the reset circuit of some embodiments of this application;

[0042] Figure 13 This is a circuit connection diagram of a crystal oscillator circuit according to some embodiments of this application. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0044] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have an intervening component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or may have an intervening component. When a component is considered to be "set on" another component, it can be directly set on the other component or may have an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only. "First," "second," and "first" are only for distinguishing component names and do not indicate order.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0046] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. The embodiments of this utility model are described in detail with reference to the schematic diagrams, which are merely examples and should not be construed as limiting the scope of protection of this utility model.

[0047] The following detailed description, in conjunction with the accompanying drawings, describes the subway platform door gap detection device provided in the embodiments of this utility model.

[0048] Please see Figure 1 The diagram shown illustrates the connection between the subway platform door gap detection device, radar detector, and control cabinet in some embodiments of this application. Figure 1 As shown, the detection device 10 is connected to the corresponding radar detector 12. The radar detector 12 is set in the corresponding platform door area and is used to scan the gap between the train and the platform door. The detection devices 10 corresponding to each platform door are connected in series with the control cabinet 20 through the communication circuit 31 and the safety circuit 32.

[0049] The detection device 10 includes a control module 11 and an input / output module 13 connected to each other. The control module 11 is used to send a scan start signal S_scan to the corresponding radar detector 12 based on the received subway door status signal S_door, and to receive the point cloud data generated by the radar detector 12 during scanning; it is also used to generate result data S_res based on the point cloud data and send the result data S_res to the control cabinet; and it is also used to output an on / off control signal S_ctr1 based on the result data S_res. The input / output module 13 is used to control the safety circuit 32 to be turned on or off based on the on / off control signal S_ctr1.

[0050] Specifically, the control cabinet 20 can be installed in the equipment room of the subway station. The control cabinet 20 has display and control functions, including but not limited to displaying information on foreign objects detected by obstacle detection, their location, and sending relevant control commands to the detection devices 10 corresponding to each platform door.

[0051] Furthermore, control cabinet 20 can be connected to the central control cabinet of the subway operation system. The central control cabinet can send subway door status signals S_door to control cabinet 20, including but not limited to platform door closing signals and locking signals. Control cabinet 20 can send the subway door status signals S_door to the corresponding detection devices 10 of each platform door through communication loop 31.

[0052] Specifically, the detection device 10 includes a control module 11 and an input / output module 13 connected to each other. The control module 11 is connected to the communication loop 31, and the input / output module 13 is connected to the safety loop 32. After receiving the subway door status signal S_door, the control module 11 determines that detection can be started and sends a scan start signal S_scan to the corresponding radar detector 12.

[0053] Specifically, the radar detector 12 can be installed on the barrier beam above the subway platform door, providing full top-down coverage of the scanning area where the platform door is located. After receiving the scan start signal S_scan, the radar detector 12 generates point cloud data of the scanning area through laser scanning and sends the point cloud data to the control module 11 through the connection with the detection device 10. Specifically, the point cloud data can be transmitted via the Modbus-TCP protocol.

[0054] The control module 11 analyzes the received point cloud data to obtain gap detection result data S_res. This result data S_res may include foreign object information, the location of the foreign object, etc. Specifically, the control module 11

[0055] After analyzing the received point cloud data, it is determined whether there are foreign objects in the scanned area. The control module 11 sends the result data S_res to the control cabinet 20 through the communication loop 31. The control cabinet 20 can display the result data S_res and send an alarm message to relevant personnel when a foreign object is detected, reminding them to handle the foreign object.

[0056] Simultaneously, the control module 11 outputs an on / off control signal S_ctr1 to the input / output module 13 based on the result data S_res. The input / output module 13 controls the safety circuit 32 to be turned on or off according to the on / off control signal S_ctr1. In some embodiments, the safety circuit 32 is in the on state by default. When the input / output module 13 of any detection device 10 receives the on / off control signal S_ctr1, it disconnects the safety circuit 32, maintaining the subway in a stopped state to avoid accidents. After the foreign object removal is completed, the control module 11 can restart the radar detector 12 to scan and send the on / off control signal S_ctr1 to control the input / output module 13 to reconnect the safety circuit 32, restoring the subway to normal operation.

[0057] In some embodiments, Figure 2 This is a schematic diagram showing the connection between the bypass switch and the detection device in some embodiments of this application, such as... Figure 2 As shown, the detection device 10 corresponding to each platform door is also connected to the bypass switch 14 corresponding to each platform door. The bypass switch 14 is used to send a bypass signal to the detection device 10 when the corresponding radar detector 12 fails. The detection device 10 disconnects from the radar detector 12 based on the bypass signal and controls the safety circuit to be turned on.

[0058] Specifically, the bypass switch can be installed in the platform screen door area. When a radar detector 12 malfunctions, relevant personnel can operate the corresponding bypass switch to send a bypass signal to the detection device 10. After receiving the bypass signal, the detection device 10 disconnects from the radar detector 12. If the safety circuit is in an open state, the safety circuit is controlled to be restored to a conducting state to prevent the malfunction of the radar detector from affecting subway operation.

[0059] In some embodiments, Figure 3 This is a schematic diagram showing the connection between the input / output module and the control module in some embodiments of this application, such as... Figure 3As shown, the input / output module 13 includes at least one input conversion circuit 131, at least one output conversion circuit 132, and at least one relay control circuit 133 connected to the control module 11. The input conversion circuit 131 is used to perform isolation level conversion on the input signal and then send it to the control module. The output conversion circuit 132 is used to perform isolation level conversion on the output signal sent by the control module and then output it. The relay control circuit 133 includes a relay connected to the safety circuit. The relay switches based on the on / off control signal to control the safety circuit to be turned on or off.

[0060] In this embodiment, the input conversion circuit 131 performs isolation level conversion on the input signal from the external input detection device, enabling the input signal to be recognized and processed by the control module, and reducing noise in the input signal through isolation conversion. Specifically, the level conversion of the input conversion circuit 131 can be from high voltage to low voltage. The output conversion circuit 132 performs isolation level conversion on the output signal sent from the control module to the outside, enabling the external device to recognize and process the corresponding output signal, and reducing noise in the output signal through isolation conversion. Specifically, the level conversion of the output conversion circuit 132 can be from low voltage to high voltage.

[0061] The relay control circuit 133 includes a relay connected to the safety circuit, which switches based on an on / off control signal to control the safety circuit to be turned on or off.

[0062] Specifically, Figure 4 This is a circuit connection diagram of the relay control circuit of some embodiments of this application, such as... Figure 4 As shown, the relay control circuit 133 includes a relay K1, a first optocoupler PH2, resistors R3, R5, R8, R18, transistor Q1, and MOSFET MQ1.

[0063] The on / off control signal S_ctr1 is connected to one end of resistor R3. The other end of resistor R3 is connected to one end of resistor R5 and the base of transistor Q1. The other end of resistor R5 is connected to the emitter of transistor Q1 and grounded. The collector of transistor Q1 is connected to one end of resistor R8. The other end of resistor R8 is connected to the second end of the first optocoupler PH2. The first end of the first optocoupler PH2 is connected to the first power supply terminal VCC1. The third end of the first optocoupler PH2 is connected to the second power supply terminal VCC2. The fourth end of the first optocoupler PH2 is connected to one end of resistor R18. The other end of resistor R18 is connected to the gate of MOSFET MQ1. The drain of MOSFET MQ1 is connected to the first end of relay K1. The source of MOSFET MQ1 is grounded. The sixth end of relay K1 is connected to the third power supply terminal VCC3. The second and third ends of relay K1 are connected to the safety circuit, and the contacts of the second and third ends are normally open.

[0064] When the control module determines that the detection result indicates the presence of a foreign object, it outputs a low-level on / off control signal S_ctr1, which controls the transistor Q1 to turn off, the diode at the input terminal of the first optocoupler PH2 to be cut off, the transistor at the output terminal of the first optocoupler PH2 to turn off, the gate of the MOSFET MQ1 to be left floating, thus turning off the MOSFET MQ1. No current flows between the first and sixth terminals of the relay K1, and the second and third terminals remain open, thus disconnecting the safety circuit.

[0065] After the foreign object is removed, the control module outputs a high-level on / off control signal S_ctr1, which controls the transistor Q1 to conduct, turns on the diode at the input terminal of the first optocoupler PH2, and turns on the transistor at the output terminal of the first optocoupler PH2, outputting a high-level signal. The voltage of this high-level signal is greater than the conduction voltage of the MOSFET MQ1, causing the MOSFET MQ1 to conduct. Current flows between the first and sixth terminals of the relay K1, and the contacts at the second and third terminals of the relay K1 close, closing and conducting the safety circuit.

[0066] In this circuit, resistors R3, R5, R8, and R18 act as voltage dividers. The first optocoupler PH2 achieves isolated voltage conversion of the signal from VCC1 to VCC2. In a specific embodiment, VCC1 is 5V, VCC2 is 15V, and VCC3 is 24V.

[0067] In some embodiments, Figure 5 This is a circuit connection diagram of the output conversion circuit of some embodiments of this application, such as... Figure 5 As shown, the output conversion circuit 132 includes a second optocoupler PH3, resistors R36, R41, R44, R47, R50, R21, transistor Q5, MOSFET MQ5, and light-emitting diode LED7.

[0068] The output signal Sout1 is connected to one end of resistor R36. The other end of resistor R36 is connected to one end of resistor R41 and the base of transistor Q5. The other end of resistor R41 and the emitter of transistor Q5 are grounded. The collector of transistor Q5 is connected to one end of resistor R44. The other end of resistor R44 is connected to the second end of the second optocoupler PH3. The first end of the second optocoupler PH3 is connected to the first power supply terminal VCC1. The third end of the second optocoupler PH3 is connected to the second power supply terminal VCC2. The fourth end of the second optocoupler is connected to one end of resistor R47 and one end of resistor R50. The other end of resistor R47 is grounded. The other end of resistor R50 is connected to the gate of MOSFET MQ5. The drain of MOSFET MQ5 is the output terminal Sout2 of the output conversion circuit 132 and is connected to the negative terminal of LED7. The source of MOSFET MQ5 is grounded. The positive terminal of LED7 is connected to one end of resistor R21. The other end of resistor R21 is connected to the third power supply terminal VCC3.

[0069] Similar to the above embodiment, when the output signal Sout1 is high, transistor Q5 is turned on, the input diode of the second optocoupler PH3 is turned on, and the output transistor of the second optocoupler PH3 is turned on, outputting a high-level signal. The voltage of this high-level signal is greater than the turn-on voltage of MOSFET MQ5, causing MOSFET MQ5 to turn on, the output Sout2 is low, and LED7 illuminates for signal indication. When the output signal Sout1 is low, transistor Q5 is turned off, the input diode of the second optocoupler PH3 is cut off, the output transistor of the second optocoupler PH3 is turned off, the gate of MOSFET MQ5 is low, MOSFET MQ5 is turned off, the output Sout2 of the output conversion circuit 132 outputs a high level, and LED7 does not illuminate.

[0070] In this circuit, resistors R36, R41, R44, R47, and R50 act as voltage dividers. The second optocoupler PH3 achieves isolated voltage conversion of the signal from VCC1 to VCC2. Specifically, the output signal Sout1 of the output conversion circuit can be an alarm signal used to control external devices.

[0071] In some embodiments, Figure 6 This is a circuit connection diagram of the input conversion circuit of some embodiments of this application, such as... Figure 6 As shown, the input conversion circuit 131 includes a third optocoupler PH1, resistors R9, R15, R24, and a light-emitting diode LED8. The input signal Sin1 is connected to the first terminal of the third optocoupler PH1 and to one end of resistor R24. The other end of resistor R24 ​​is connected to the positive terminal of LED8, and the negative terminal of LED8 is grounded. The second terminal of the third optocoupler PH1 is connected to one end of resistor R9, and the other end of resistor R9 is grounded. The third terminal of the third optocoupler PH1 is the output terminal Sin2 of the input conversion circuit and is connected to the VCC power supply terminal through resistor R15. The fourth terminal of the third optocoupler PH1 is grounded.

[0072] When the input signal Sin1 is high, LED8 illuminates for signal indication, the diode at the input terminal of the third optocoupler PH1 conducts, causing the transistor at the output terminal of PH1 to conduct, and the output terminal Sin2 of the input conversion circuit outputs a low level. When the input signal Sin1 is low, LED8 does not illuminate, the diode at the input terminal of the third optocoupler PH1 is cut off, causing the transistor at the output terminal of PH1 to turn off, and the output terminal Sin2 of the input conversion circuit outputs a high level. Resistors R9 and R15 act as a voltage divider in the circuit. The third optocoupler PH1 achieves isolated signal voltage conversion. Specifically, the input signal Sin1 of the input conversion circuit can be a bypass signal from the radar detector.

[0073] In some embodiments, Figure 7This is a schematic diagram of the structure of the control module in some embodiments of this application, such as... Figure 7 As shown, the control module 11 includes a first communication circuit 15, a controller 110, and a second communication circuit 16 connected in sequence. The first communication circuit 15 is connected to the corresponding radar detector, and the second communication circuit 16 is connected to the communication loop 31. The first communication circuit 15 includes an Ethernet port circuit 151 and a super Ethernet port circuit 152 connected to the controller 110; the second communication circuit 16 includes a first CAN bus circuit 161 and a second CAN bus circuit 162 connected to the controller 110.

[0074] Both the Ethernet port circuit 151 and the super Ethernet port circuit 152 can achieve network connection with the radar detector. In the event of a failure of the Ethernet port circuit 151, the super Ethernet port circuit 152 is used as a backup connection for communication, which improves the reliability of data transmission between the control module and the radar detector.

[0075] Similarly, the first CAN bus circuit 161 and the second CAN bus circuit 162 are redundant backups of each other, and realize dual-redundant CAN bus communication with the detection devices corresponding to the control cabinet and other platform doors, thereby improving the reliability of the communication loop.

[0076] Specifically, Figure 8 This is a circuit connection diagram of the Ethernet port circuit of some embodiments of this application, such as... Figure 8 As shown, the Ethernet port circuit 151 includes an Ethernet controller U14, a crystal oscillator Y2, a port connector J9, resistors R92, R93, R94, R99, R100, R107, R108, R109, R110, and capacitors C34, C35, C42, C43, and C40.

[0077] The SCSn, SCLK, MISO, MOSI, INTn, and RSTn terminals of the Ethernet controller U14 are connected to the controller. The SCSn terminal is connected to one end of resistor R92, the INTn terminal is connected to one end of resistor R93, and the RSTn terminal is connected to one end of resistor R94. The other ends of resistors R92, R93, and R94 are connected to the VCC power supply.

[0078] The first clock terminal XI / CLKIN of the Ethernet controller U14 is connected to one end of resistor R99, the first terminal of crystal oscillator Y2, and one end of capacitor C35. The other end of resistor R99 is connected to the second clock terminal XO of the Ethernet controller U14 and one end of resistor R100. The other end of resistor R100 is connected to the second terminal of crystal oscillator Y2 and one end of capacitor C34. The other ends of capacitors C34 and C35 are grounded.

[0079] The TXN terminal of Ethernet controller U14 is connected to the TD- terminal of network connector J9; the TXP terminal of Ethernet controller U14 is connected to the TD+ terminal of network connector J9; the RXN terminal of Ethernet controller U14 is connected to the RD- terminal of network connector J9 via capacitor C42; the RXP terminal of Ethernet controller U14 is connected to the RD+ terminal of network connector J9 via capacitor C43; the LINKLED terminal of Ethernet controller U14 is connected to the GRE- terminal of network connector J9; and the ACTLED terminal of Ethernet controller U14 is connected to the YEL- terminal of network connector J9.

[0080] The RXP terminal of the Ethernet controller U14 is connected to one end of resistor R109, and the RXN terminal is connected to one end of resistor R110. The other ends of resistors R109 and R110 are grounded through capacitor C40. The TXN terminal of the Ethernet controller U14 is connected to one end of resistor R108, and the TXP terminal is connected to one end of resistor R107. The other ends of resistors R108 and R107 are connected to the VCC power supply terminal.

[0081] Specifically, the Ethernet controller U14 can be a W5500, supporting a high-speed standard 4-wire SPI interface for communication with the host. Theoretically, this SPI rate can reach 80MHz, enabling rapid transmission of large amounts of radar point cloud data. The network connector J9 can be an RJ45 connector. The crystal oscillator Y2 can be a passive crystal oscillator. The SCSn, SCLK, MISO, MOSI, INTn, and RSTn pins of U14 connect to the corresponding ports of the controller for data transmission. The TXN, RXN, TXP, and RXP pins of the Ethernet controller U14 connect to the corresponding pins of the network connector J9 for sending and receiving information. The LINKLED and ACTLED pins of the Ethernet controller U14 connect to the corresponding pins of the network connector J9 to flash indicator lights to indicate the working status of the network port.

[0082] In some embodiments, Figure 9 This is a circuit connection diagram of the super Ethernet port circuit of some embodiments of this application, such as... Figure 9 As shown, the super Ethernet circuit 152 includes a serial port converter U5, capacitors C9 and C10. The RXD and TXD terminals of the serial port converter U5 are connected to the controller. The VDD terminal of the serial port converter U5 is connected to one end of capacitors C9 and C10. The other end of capacitors C9 and C10 is connected to the GND terminal of the serial port converter U5 and grounded.

[0083] Specifically, the serial-to-network converter U5 can be a Super Ethernet USR-K7. The RXD and TXD pins of the serial-to-network converter U5 are connected to the serial communication pins of the controller for sending and receiving information. The Super Ethernet circuit can be connected to a computer webpage to configure the network port IP address, baud rate, and other related data, or it can serve as a backup circuit for the Ethernet circuit. When the Ethernet circuit fails, the Super Ethernet circuit is used to maintain communication between the detection device and the radar detector, including the transmission of point cloud data.

[0084] In some embodiments, Figure 10 This is a circuit connection diagram of the first CAN bus circuit of some embodiments of this application, such as... Figure 10 As shown, the first CAN bus circuit 161 includes a bus driver U1, capacitors C1, C3, C5, C7, capacitor EC1, inductor L1, and transient suppression diodes DT1 and DT3.

[0085] The RXD and TXD terminals of bus driver U1 are connected to the corresponding ports of the controller for bus transmission. The VCC1 terminal of bus driver U1 is connected to the VCC power supply terminal, one end of capacitor EC1, and one end of capacitor C1. The GND1 terminal of bus driver U1 is connected to the other ends of capacitor EC1 and capacitor C1 and grounded. The GND2 terminal of bus driver U1 is grounded. The VCC2 terminal of bus driver U1 is connected to the ISO power supply terminal and one end of capacitor C3, with the other end of capacitor C3 grounded. The CANH terminal of bus driver U1 is connected to the first end of inductor L1. The CANL terminal of bus driver U1 is connected to the fourth end of inductor L1. The second end of inductor L1 is connected to one end of capacitor C7 and one end of transient suppression diode DT3, and connected to the first access terminal CAN1H of the CAN bus. The third end of inductor L1 is connected to one end of capacitor C5 and one end of transient suppression diode DT1, and connected to the second access terminal CAN1L of the CAN bus. The other ends of capacitors C5 and C7, and transient suppression diodes DT1 and DT3 are grounded.

[0086] The first CAN bus circuit 161 is used for communication between the control cabinet and the detection devices corresponding to each platform door, including but not limited to transmitting radar detector status information, control information, and detection result data. This circuit realizes real-time communication between multiple detection device nodes and can effectively resist electromagnetic interference and noise interference, exhibiting high reliability.

[0087] Specifically, the second CAN bus circuit 162 can have the same circuit structure as the first CAN bus circuit 161.

[0088] In some embodiments, the controller may be a circuit unit including a processor, an EEPROM memory, a reset circuit, and a crystal oscillator circuit. The processor may be a CPU, FPGA, MCU, or other device with data processing capabilities. In one specific embodiment, the processor is an STM32F407VET6 with a maximum operating frequency of 168MHz and five GPIO groups, each containing 16 points; its high computing power can effectively process the massive point cloud data of the radar.

[0089] In some embodiments, Figure 11 This is a circuit connection diagram of the EEPROM memory in some embodiments of this application, such as... Figure 11 As shown, the EEPROM memory can be an electrically erasable programmable memory U11, model AT24C512, used to store point cloud data and detection result data. The SCL terminal of the programmable memory U11 is connected to the corresponding port of the processor via resistor R89, and the SDA terminal is connected to the corresponding port of the processor via resistor R90 to achieve data transmission. The SCL and SDA terminals are also connected to the VCC power supply terminal via resistors R87 and R88 respectively to achieve pull-up functionality. The WP terminal of the programmable memory U11 is connected to one end of capacitor C30 and grounded, and the VCC terminal of the programmable memory U11 is connected to the VCC power supply terminal and the other end of capacitor C30. The A1 and GND terminals of the programmable memory U11 are grounded.

[0090] In some embodiments, Figure 12 This is a circuit connection diagram of the reset circuit of some embodiments of this application, such as... Figure 12 As shown, the reset circuit includes a reset chip U12, resistors R85 and R86, capacitors C29 and C33, and button S3. The RESET terminal of the reset chip U12 is connected to one end of resistor R85 and one end of resistor R86. The other end of resistor R85 is connected to the corresponding port of the processor, one end of capacitor C29, and one end of button S3. The other ends of button S3 and capacitor C29 are grounded. The other end of resistor R86 is connected to the VCC power supply terminal, the VCC terminal of the reset chip U12, and one end of capacitor C33. The other end of capacitor C33 is grounded. The reset circuit is used for button reset of the controller, allowing the system to start running from its initial state.

[0091] In some embodiments, Figure 13 This is a circuit connection diagram of the crystal oscillator circuit of some embodiments of this application, such as... Figure 13As shown, the crystal oscillator circuit includes crystal Y1, resistor R84, and capacitors C31 and C32. The first terminal of crystal Y1 is connected to one end of resistor R84. The other end of resistor R84 is connected to the VCC power supply terminal and one end of capacitor C31. The other end of capacitor C31 is grounded. The second terminal of crystal Y1 is connected to one end of capacitor C32 and grounded. The other end of capacitor C32 is connected to the third terminal of crystal Y1 and the clock signal input terminal of the processor. The fourth terminal of crystal Y1 is connected to the VCC power supply terminal. The crystal oscillator circuit is used to generate a precise and stable clock signal to ensure the normal operation of the system.

[0092] The connection relationships and uses of each circuit in this embodiment have been described in the above embodiments, and will not be repeated here.

[0093] Some embodiments of this application also provide a detection system for the gap between subway platform doors. The detection system includes a control cabinet, multiple radar detectors corresponding to multiple platform doors, multiple detection devices as described in the above embodiments, and multiple bypass switches. The detection devices are connected one-to-one with the radar detectors and bypass switches. The control cabinet and multiple detection devices are connected in series through communication circuits and safety circuits.

[0094] The subway platform door gap detection system in this embodiment uses radar detectors corresponding to each platform door to perform laser scanning of the platform door gap to generate point cloud data. The detection device obtains the detection result of the platform door gap based on the corresponding point cloud data. If the detection result indicates the presence of an obstacle, the safety circuit is disconnected. This solves the problem of blind spots in platform door gap detection, which easily leads to missed or false alarms, improves the safety of subway operation, and meets the requirements of intelligent subway operation.

[0095] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A device for detecting the gap between subway platform doors, characterized in that, The detection device is connected to a corresponding radar detector, which is set in the corresponding platform door area to scan the gap between the train and the platform door. The detection devices corresponding to each platform door are connected in series with the control cabinet through communication circuits and safety circuits. The detection device includes interconnected control modules and input / output modules. The control module is used to send a scan start signal to the corresponding radar detector based on the received subway door status signal, and to receive the point cloud data generated by the radar detector during scanning; it is also used to generate result data based on the point cloud data and send the result data to the control cabinet. It is also used to output an on / off control signal based on the result data; The input / output module is used to control the safety circuit to be turned on or off based on the on / off control signal.

2. The detection device according to claim 1, characterized in that, The input / output module includes at least one input conversion circuit, at least one output conversion circuit, and at least one relay control circuit connected to the control module. The input conversion circuit is used to perform isolated level conversion on the input signal and then send it to the control module; The output conversion circuit is used to perform isolated level conversion on the output signal sent by the control module before outputting it. The relay control circuit includes a relay connected to the safety circuit. The relay switches based on the on / off control signal to control the safety circuit to be turned on or off.

3. The detection device according to claim 2, characterized in that, The relay control circuit also includes a first optocoupler, resistors R3, R5, R8, R18, transistor Q1, and MOSFET MQ1. The on / off control signal is connected to one end of resistor R3. The other end of resistor R3 is connected to one end of resistor R5 and the base of transistor Q1. The other end of resistor R5 and the emitter of transistor Q1 are grounded. The collector of transistor Q1 is connected to one end of resistor R8. The other end of resistor R8 is connected to the second end of the first optocoupler. The first end of the first optocoupler is connected to the first power supply terminal. The third end of the first optocoupler is connected to the second power supply terminal. The fourth end of the first optocoupler is connected to one end of resistor R18. The other end of resistor R18 is connected to the gate of MOSFET MQ1. The drain of MOSFET MQ1 is connected to the first terminal of the relay. The source of MOSFET MQ1 is grounded. The sixth terminal of the relay is connected to the third power supply terminal. The second and third terminals of the relay are connected to the safety circuit.

4. The detection device according to claim 2, characterized in that, The output conversion circuit includes a second optocoupler, resistors R36, R41, R44, R47, R50, R21, transistor Q5, MOSFET MQ5, and light-emitting diode LED7. The output signal is connected to one end of resistor R36. The other end of resistor R36 is connected to one end of resistor R41 and the base of transistor Q5. The other end of resistor R41 and the emitter of transistor Q5 are grounded. The collector of transistor Q5 is connected to one end of resistor R44. The other end of resistor R44 is connected to the second end of the second optocoupler. The first end of the second optocoupler is connected to the first power supply terminal. The third end of the second optocoupler is connected to the second power supply terminal. The fourth end of the second optocoupler is connected to one end of resistor R47 and one end of resistor R50. The other end of resistor R47 is grounded. The other end of resistor R50 is connected to the gate of MOSFET MQ5. The drain of MOSFET MQ5 is the output terminal of the output conversion circuit and is connected to the negative terminal of LED7. The source of MOSFET MQ5 is grounded. The positive terminal of LED7 is connected to one end of resistor R21. The other end of resistor R21 is connected to the third power supply terminal.

5. The detection device according to claim 2, characterized in that, The input conversion circuit includes a third optocoupler, resistors R9, R15, R24, and a light-emitting diode LED8. The input signal is connected to the first terminal of the third optocoupler and to one end of the resistor R24. The other end of the resistor R24 ​​is connected to the positive terminal of the light-emitting diode LED8. The negative terminal of the light-emitting diode LED8 is grounded. The second terminal of the third optocoupler is connected to one end of the resistor R9. The other end of the resistor R9 is grounded. The third terminal of the third optocoupler is the output terminal of the input conversion circuit and is connected to the VCC power supply terminal through the resistor R15. The fourth terminal of the third optocoupler is grounded.

6. The detection device according to claim 1, characterized in that, The control module includes a first communication circuit, a controller, and a second communication circuit connected in sequence. The first communication circuit is connected to the corresponding radar detector, and the second communication circuit is connected to the communication loop. The first communication circuit includes an Ethernet port circuit and a super Ethernet port circuit connected to the controller; The second communication circuit includes a first CAN bus circuit and a second CAN bus circuit connected to the controller.

7. The detection device according to claim 6, characterized in that, The Ethernet port circuit includes an Ethernet controller, a crystal oscillator, a network port connector, resistors R92, R93, R94, R99, R100, R107, R108, R109, R110, and capacitors C34, C35, C42, C43, and C40. The SCSn, SCLK, MISO, MOSI, INTn, and RSTn terminals of the Ethernet controller are connected to the controller; the SCSn terminal is connected to one end of the resistor R92, the INTn terminal is connected to one end of the resistor R93, the RSTn terminal is connected to one end of the resistor R94, and the other ends of the resistors R92, R93, and R94 are connected to the VCC power supply terminal. The first clock terminal of the Ethernet controller is connected to one end of the resistor R99, the first terminal of the crystal oscillator, and one end of the capacitor C35. The other end of the resistor R99 is connected to the second clock terminal of the Ethernet controller and one end of the resistor R100. The other end of the resistor R100 is connected to the second terminal of the crystal oscillator and one end of the capacitor C34. The other ends of the capacitors C34 and C35 are grounded. The TXN terminal of the Ethernet controller is connected to the TD- terminal of the network port connector, the TXP terminal of the Ethernet controller is connected to the TD+ terminal of the network port connector, the RXN terminal of the Ethernet controller is connected to the RD- terminal of the network port connector through capacitor C42, and the RXP terminal of the Ethernet controller is connected to the RD+ terminal of the network port connector through capacitor C43; the LINKLED terminal of the Ethernet controller is connected to the GRE- terminal of the network port connector, and the ACTLED terminal of the Ethernet controller is connected to the YEL- terminal of the network port connector. The RXP terminal is connected to one end of the resistor R109, the RXN terminal is connected to one end of the resistor R110, and the other ends of the resistors R109 and R110 are grounded through the capacitor C40; the TXN terminal is connected to one end of the resistor R108, the TXP terminal is connected to one end of the resistor R107, and the other ends of the resistors R108 and R107 are connected to the VCC power supply terminal.

8. The detection device according to claim 6, characterized in that, The super Ethernet circuit includes a serial port converter, capacitors C9 and C10. The RXD and TXD terminals of the serial port converter are connected to the controller. The VDD terminal of the serial port converter is connected to one end of capacitors C9 and C10. The other end of capacitors C9 and C10 is connected to the GND terminal of the serial port converter and grounded.

9. The detection device according to claim 1, characterized in that, The detection device corresponding to each of the platform screen doors is also connected to the bypass switch corresponding to each of the platform screen doors. The bypass switch is used to send a bypass signal to the detection device in the event of a malfunction in the corresponding radar detector. Based on the bypass signal, the detection device disconnects from the radar detector and controls the safety circuit to be turned on.

10. A system for detecting the gap between subway platform doors, characterized in that, The detection system includes a control cabinet, multiple radar detectors corresponding to multiple platform doors, multiple detection devices as described in any one of claims 1 to 9, and multiple bypass switches. The detection devices are connected one-to-one with the radar detectors and the bypass switches. The control cabinet and the multiple detection devices are connected in series through communication circuits and safety circuits.

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