Urban rail vehicle dynamic gauge anti-derailment intelligent safety protection device and method

Abstract

The present application relates to a kind of urban rail vehicle dynamic limit anti-derailment intelligent safety protection device and method, belong to urban rail vehicle dynamic safety control technical field, solve the technical problems of the existing technology in urban rail vehicle dynamic test link exists without signal protection, high artificial dependence, poor adaptability in harsh environment, insufficient protection reliability.The device includes: sensing unit and main control unit;Sensing unit is installed in the safety braking position of test line, to use infrared sensing to detect vehicle boundary crossing signal, and wirelessly transmit the signal of vehicle boundary crossing to main control unit;Main control unit is installed in the driver's room of vehicle, to access vehicle emergency braking loop, when receiving vehicle boundary crossing signal, cut off vehicle emergency braking loop, trigger vehicle emergency braking.Sensing unit in the present application only needs to be fixed and installed once, and can be continuously applied;Main control unit is convenient to carry, easy to operate, can be used when powered on, and is suitable for high-frequency multi-working-condition test.

Description

Technical Field

[0001] This invention relates to the field of dynamic safety control technology for urban rail vehicles, and in particular to an intelligent safety protection device and method for preventing derailment due to dynamic clearance of urban rail vehicles. Background Technology

[0002] Before leaving the factory, urban rail vehicles must undergo multiple dynamic tests, including high-speed, braking, traction, and network testing. The test tracks are mostly simple tracks without signaling or ATP protection.

[0003] In current vehicle dynamic testing, the conventional method for identifying vehicle overshoot is to place a detonator on the rail surface at the track safety braking point, and the driver is alerted to manually stop the vehicle after it touches the detonator; in some scenarios, GPS anti-overshoot devices are used to achieve overshoot warning through positioning.

[0004] Existing vehicle detection solutions have the following drawbacks:

[0005] 1. The warning cones only have a warning function and no automatic protection or automatic braking capabilities, relying entirely on the driver's observation and manual operation.

[0006] 2. In bad weather or at night, drivers have poor visibility and cannot accurately judge braking distance. They are prone to accidents such as vehicles crashing into the retaining wall at the end of the line due to misoperation or insufficient visibility.

[0007] 3. GPS anti-overrun devices are costly and complicated to install and debug, making them unsuitable for high-frequency, multi-condition, and short-cycle dynamic testing scenarios.

[0008] 4. The test line lacks ATP protection, resulting in low reliability and weak anti-interference capabilities, failing to meet the safety protection requirements for high-frequency, long-term dynamic testing of urban rail vehicles. Summary of the Invention

[0009] This invention aims to address the technical problems of high reliance on manual labor, poor adaptability to harsh environments, and insufficient protection reliability in the dynamic testing of urban rail vehicles in the prior art, and provides an intelligent safety protection device and method for preventing derailment in urban rail vehicles with dynamic clearance.

[0010] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0011] A dynamic clearance anti-derailment intelligent safety protection device for urban rail vehicles includes: a sensing unit and a main control unit;

[0012] The sensing unit is installed next to the test line to detect vehicle boundary crossing signals using infrared sensing and wirelessly transmit the vehicle boundary crossing signals to the main control unit.

[0013] The main control unit is installed in the vehicle driver's cab and is used to connect to the vehicle's emergency braking circuit. When it receives a vehicle crossing the boundary signal, it cuts off the vehicle's emergency braking circuit and triggers the vehicle's emergency braking.

[0014] The main control unit includes: a power supply module, an alarm module, an isolation module, and a broadcast module; the power supply module is connected to the alarm module, the isolation module, and the broadcast module respectively; the alarm module and the isolation module are each connected to the broadcast module; wherein:

[0015] The power supply module is used to supply power to the alarm module, isolation module and broadcast module respectively;

[0016] The alarm module is used to issue an alarm when it receives a signal that a vehicle has crossed the boundary.

[0017] The isolation module is used to indicate when a vehicle is in an isolated state.

[0018] The broadcast module is used to broadcast voice messages under the control of the alarm module and / or isolation module.

[0019] In the above technical solution, the power module includes, in sequence: a power switch, a voltage conversion module, and a power indicator light;

[0020] The power switch is connected to an external power source and is used to control the on / off state of the external power source; the power indicator light is used to indicate whether the external power source is on or off.

[0021] The voltage conversion module is connected to the alarm module, isolation module and broadcast module respectively, and is used to convert the 220V external power supply to 24V, and to power the alarm module, isolation module and broadcast module respectively.

[0022] In the above technical solution, the alarm module includes: a wireless signal receiving module, an alarm light, and an alarm relay; the wireless signal receiving module is connected to both the alarm light and the alarm relay; the alarm relay is also connected to the broadcast module.

[0023] The wireless signal receiving module is used to receive signals from the sensing unit indicating that a vehicle has crossed the boundary.

[0024] The warning light indicates whether the wireless signal receiving module has received a signal that the vehicle has crossed the boundary.

[0025] When the wireless signal receiving module receives a signal that a vehicle has crossed the boundary, the alarm relay controls the broadcasting module to broadcast an alarm voice message.

[0026] In the above technical solution, the isolation module includes: an isolation switch, an isolation indicator light, and an isolation relay;

[0027] The disconnect switch is connected to both the disconnect indicator light and the disconnect relay; the disconnect relay is also connected to the broadcast module.

[0028] The isolating switch is used to open the vehicle when it needs to return to a safe area, so that the vehicle is isolated and the emergency braking circuit of the vehicle is restored. The device is reset after the vehicle returns to the safe area.

[0029] The isolation indicator light is used to indicate whether the vehicle is in an isolated state;

[0030] The isolation relay is used to control the broadcast module to broadcast the isolation status when the vehicle is in an isolated state.

[0031] In the above technical solution, the broadcasting module includes: a voice broadcaster; the voice broadcaster is used to broadcast alarm voice messages or isolation status voice messages under the control of an alarm relay or an isolation relay.

[0032] In the above technical solution, the main control unit includes:

[0033] The alarm relay is connected in series with the isolation relay on the power supply line of the voice broadcaster;

[0034] The isolation relay is also installed separately on another power supply line for the voice broadcaster.

[0035] In the above technical solution, the main control unit includes:

[0036] The alarm relay and the isolation relay are connected in parallel between the vehicle emergency braking loop input line and the vehicle emergency braking loop output line;

[0037] The alarm relay is also installed on the power supply line of the alarm light;

[0038] The isolation relay and the isolation indicator light are connected in parallel.

[0039] The disconnecting switch and the disconnecting relay are connected in series and then connected in parallel with the disconnecting indicator light. The disconnecting switch is used to control the on / off state of this parallel circuit.

[0040] In the above technical solution, the self-locking circuit formed by the normally open contact of the alarm relay and the normally closed contact of the isolation relay is as follows: After the alarm relay is energized, its normally open contact closes, and the current continuously supplies power to the alarm relay coil through the holding circuit formed by the normally closed contact of the isolation relay and the normally open contact of the alarm relay, so that the alarm relay remains energized after the vehicle boundary crossing signal disappears, thereby ensuring the stability of the alarm signal; when the isolating switch is turned to the open position and the isolation relay is energized, the normally closed contact of the isolation relay opens, the self-locking circuit is released, and the alarm relay is reset.

[0041] In the above technical solution, the sensing unit includes: a solar power supply module, an infrared sensor, a wireless signal control relay, and a wireless signal transmission module; the solar power supply module is connected to the infrared sensor, the wireless signal control relay, and the wireless signal transmission module respectively; the infrared sensor, the wireless signal control relay, and the wireless signal transmission module are connected in sequence.

[0042] The solar power module provides power to the infrared sensor, the wireless signal control relay, and the wireless signal transmitter module, respectively; the infrared sensor transmits the vehicle boundary crossing signal to the wireless signal transmitter module; the wireless signal control relay controls whether the infrared sensor and the wireless signal transmitter module are working; and the wireless signal transmitter module transmits the vehicle boundary crossing signal.

[0043] In the above technical solution, in the sensing unit: the wireless signal control relay is respectively installed on the power supply lines of the infrared sensor and the wireless signal transmitting module.

[0044] A method for intelligent safety protection against derailment due to dynamic clearance of urban rail vehicles, applicable to the aforementioned intelligent safety protection device for preventing derailment due to dynamic clearance of urban rail vehicles, includes the following steps:

[0045] Step 1: Connect the input line of the vehicle emergency braking loop to the normally closed contact of the alarm relay of the main control unit, and connect the output line of the vehicle emergency braking loop to the normally open contact of the isolation relay of the main control unit.

[0046] Step 2: When the test vehicle does not trigger the infrared signal of the sensor unit, the alarm relay contact of the main control unit connected in series in the vehicle's emergency braking loop remains normally closed;

[0047] Step 3: When the wireless signal receiving module receives a vehicle boundary crossing signal sent by the sensing unit, it triggers the alarm relay to engage, the alarm light to illuminate, and a self-locking mechanism is formed between the normally open contact of the alarm relay and the normally closed contact of the isolation relay. The voice alarm then issues a voice alarm message indicating that the vehicle has crossed the safe zone to remind the driver of the vehicle's status. When the alarm relay is disconnected, the alarm relay contact connected in series in the vehicle's emergency braking loop is disconnected, the vehicle's emergency braking loop is broken, and the vehicle applies emergency braking to stop.

[0048] Step 4: When the vehicle stops and needs to return to the safe area, turn the isolation switch to the open position, the isolation relay will be activated, the vehicle's emergency braking circuit will be re-established, the isolation indicator light will illuminate, the voice alarm will stop broadcasting the alarm message that the vehicle has crossed the safe area, and the broadcasting equipment will announce that the isolation has been completed.

[0049] Step 5: After the vehicle enters the safe area, reset the isolation switch, and the vehicle will undergo dynamic testing again. This invention has the following beneficial effects:

[0050] 1. Low cost: The intelligent safety protection device for preventing derailment of urban rail vehicles with dynamic clearance of the present invention has a simple structure, consisting of a sensing unit and a main control unit. The sensing unit only needs to be fixed and installed once for continuous use. The main control unit is easy to carry and operate, and can be used as soon as it is powered on, making it suitable for high-frequency and multi-condition tests.

[0051] 2. Green and stable power supply: The intelligent safety protection device for preventing derailment of urban rail vehicles in this invention adopts a solar power supply module to provide a stable power supply voltage for the sensing unit, eliminating the dependence on traditional power supply, saving energy and reducing carbon emissions, and ensuring continuous and stable power supply, which is in line with the concept of green and low-carbon development.

[0052] 3. Intelligent automatic protection: The intelligent safety protection device for preventing derailment of urban rail vehicles in this invention uses infrared sensors to accurately identify the vehicle's position. Combined with a remote wireless communication module and relays, it realizes automatic signal processing and linkage with onboard equipment, enabling emergency braking without manual intervention and achieving intelligent upgrade of the testing process.

[0053] 4. Dual sound and light alarm: The intelligent safety protection device for preventing derailment of urban rail vehicles in this invention includes a voice broadcaster and an alarm light. These can inform the driver of the vehicle status when the train is overshooting. At the same time, the device will prompt the driver that "the vehicle has been taken over by the safety guard for braking" to indicate that the vehicle is not malfunctioning, thus avoiding inaccurate information that may mislead the driver's operation.

[0054] 5. High reliability and anti-interference: The intelligent safety protection device for preventing derailment of urban rail vehicles in this invention features a self-locking design in the main control unit control circuit and a waterproof structure, making it suitable for harsh environments such as rain, snow, fog, and night.

[0055] 6. Convenient isolation and reset: The intelligent safety protection device for preventing derailment of urban rail vehicles in this invention has an isolation function. After the vehicle crosses the safety zone and stops in an emergency, the isolation switch of the main control unit is operated to quickly re-establish the emergency braking loop, helping the driver to immediately drive the vehicle into the safe zone and ensuring vehicle safety. Attached Figure Description

[0056] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0057] Figure 1 This is a structural schematic diagram of the intelligent safety protection device for preventing derailment of urban rail vehicles according to the present invention.

[0058] Figure 2 This is a schematic diagram of the sensing unit in the intelligent safety protection device for preventing derailment of urban rail vehicles according to the present invention.

[0059] Figure 3This is a circuit control schematic diagram of the sensing unit in the intelligent safety protection device for preventing derailment of urban rail vehicles according to the present invention.

[0060] Figure 4 This is a schematic diagram of the main control unit in the intelligent safety protection device for preventing derailment of urban rail vehicles according to the present invention.

[0061] Figure 5 This is a circuit control schematic diagram of the main control unit in the intelligent safety protection device for preventing derailment of urban rail vehicles according to the present invention.

[0062] Figure 6 This is a flowchart illustrating the steps of the intelligent safety protection method for preventing derailment of urban rail vehicles based on the dynamic clearance of urban rail vehicles applied to the dynamic test line before leaving the factory, according to the present invention.

[0063] The reference numerals in the figure are:

[0064] 1-Sensing unit; 2-Main control unit;

[0065] 11-Solar power supply module; 12-Infrared sensor; 13-Wireless signal control relay (KA4); 14-Wireless signal transmission module;

[0066] 21-Power switch; 22-Voltage conversion module; 23-Power indicator light (H1); 24-Alarm light (H2); 25-Isolation indicator light (H3); 26-Wireless signal receiving module; 27-Alarm relay (KA1); 28-Isolation relay (KA2); 29-Voice announcer; 210-Isolation switch (SB1). Detailed Implementation

[0067] The intelligent safety protection device and method for preventing derailment of urban rail vehicles in this invention realizes automatic detection of vehicle crossing the boundary, wireless transmission, audible and visual alarm and emergency braking linkage through independent, intelligent and automatic braking, avoiding vehicle derailment or collision with the barrier wall, and ensuring safety throughout the dynamic test process.

[0068] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0069] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The invention will be further described in detail below with reference to the accompanying drawings.

[0070] like Figure 1 As shown, the intelligent safety protection device for preventing derailment of urban rail vehicles according to the present invention includes: a sensing unit 1 and a main control unit 2; the sensing unit 1 is installed at the safety braking position beside the test track; the sensing unit 1 is used to detect the vehicle boundary crossing signal using infrared sensing and wirelessly transmit the vehicle boundary crossing signal to the main control unit 2; the main control unit 2 is installed in the vehicle driver's cab; the main control unit 2 is used to connect to the vehicle emergency braking loop, and when it receives the vehicle boundary crossing signal, it automatically cuts off the vehicle emergency braking loop, triggers the vehicle emergency braking, and has audible and visual alarm, self-locking and isolation reset functions. The main control unit 2 includes: a power supply module, an alarm module, an isolation module, and a broadcast module; the power supply module is connected to the alarm module, the isolation module, and the broadcast module respectively; the alarm module and the isolation module are connected to the broadcast module respectively; wherein: the power supply module is used to supply power to the alarm module, the isolation module, and the broadcast module respectively; the alarm module is used to alarm when it receives a signal that the vehicle has crossed the boundary; the isolation module is used to prompt that the vehicle is in an isolated state; the broadcast module is used to perform voice broadcast under the control of the alarm module and / or the isolation module.

[0071] The intelligent safety protection device for preventing derailment of urban rail vehicles according to the present invention uses infrared detection principle. A sensing unit 1 is installed at the safe braking position point next to the dynamic test line. When the vehicle crosses the safe area, it will touch the infrared signal, thereby triggering the main control unit 2 installed in the driver's cab. The main control unit 2 sends an electrical signal and transmits it to the vehicle that is undergoing dynamic testing, and issues a command to start the vehicle's emergency braking system, thereby ensuring operational safety.

[0072] Specifically:

[0073] like Figure 2As shown, the sensing unit 1 mainly consists of: a solar power supply module 11, an infrared sensor 12, a wireless signal control relay 13, and a wireless signal transmission module 14. The solar power supply module 11 is connected to the infrared sensor 12, the wireless signal control relay 13, and the wireless signal transmission module 14 respectively; the infrared sensor 12, the wireless signal control relay 13, and the wireless signal transmission module 14 are connected in sequence.

[0074] like Figure 3 As shown, in the circuit of sensing unit 1: the wireless signal control relay 13 is connected to the power supply lines of the infrared sensor 12 and the wireless signal transmitting module 14, respectively. The solar power supply module 11 provides a stable and uninterrupted power supply to the infrared sensor 12, the wireless signal control relay 13, and the wireless signal transmitting module 14, eliminating the limitation of external power supply. The infrared sensor 12 adopts a dual-channel redundant acquisition structure to improve signal recognition accuracy and has a waterproof protection structure to adapt to harsh outdoor environments. The infrared sensor 12 is used to transmit the vehicle boundary detection signal to the wireless signal transmitting module 14. The wireless signal control relay 13 is used to control whether the infrared sensor 12 and the wireless signal transmitting module 14 are working. The wireless signal transmitting module 14 is used to transmit a wireless alarm signal to indicate that the vehicle has crossed the boundary.

[0075] The working principle of the sensing unit 1 is as follows: When the vehicle crosses the safety zone, the infrared sensor 12 detects the boundary crossing signal and triggers the wireless signal control relay 13 to engage; at the same time, the wireless signal transmitting module 14 sends the alarm information of the vehicle crossing the safety line to the wireless signal receiving module 26 of the main control unit 2 in the driver's cab via a wireless alarm signal.

[0076] like Figure 4 As shown, the main control unit 2 mainly consists of: a power switch 21, a voltage conversion module 22, a power indicator light 23, an alarm light 24, an isolation indicator light 25, a wireless signal receiving module 26, an alarm relay 27, an isolation relay 28, a voice broadcaster 29, and an isolation switch 210. An external power supply is connected to the power switch 21; the power switch 21 is connected in sequence to the voltage conversion module 22 and the power indicator light 23; the voltage conversion module 22 is also connected to the wireless signal receiving module 26 and the isolation switch 210; the wireless signal receiving module 26 is connected to the alarm light 24 and the alarm relay 27, and the isolation switch 210 is connected to the isolation relay 28 and the isolation indicator light 25; the alarm relay 27 and the isolation relay 28 are also connected to the voice broadcaster 29.

[0077] like Figure 5As shown, in the circuit of the main control unit 2: the alarm relay 27 is connected in series with the isolation relay 28 on the power supply line of the voice broadcaster 29; the isolation relay 28 is also separately installed on another power supply line of the voice broadcaster 29.

[0078] The alarm relay 27 and the isolation relay 28 are connected in parallel between the vehicle emergency braking loop input line and the vehicle emergency braking loop output line; the alarm relay 27 is also installed on the power supply line of the alarm light 24; the isolation relay 28 is connected in parallel with the isolation indicator light 25; the isolation switch 210 is connected in series with the isolation relay 28 and in parallel with the isolation indicator light 25, and the isolation switch 210 is used to control the on and off of the parallel circuit.

[0079] Power switch 21 is used to control the on / off state of external power supply; voltage conversion module 22 is used to convert 220V external power supply to 24V; power indicator light 23 is used to indicate the on / off state of power switch 21; wireless signal receiving module 26 is used to receive wireless alarm signals transmitted by wireless signal transmitting module 14; alarm light 24 is used to indicate whether the main control unit 2 has received a wireless alarm signal; alarm relay 27 controls the on / off state of alarm light 24 circuit; isolating switch 210 is used to restore the vehicle's emergency braking loop when the vehicle needs to return to a safe area, and reset the device after the vehicle returns to the safe area to re-engage protection; isolating relay 28 is used to control the on / off state of isolating indicator light 25 circuit; isolating indicator light 25 indicates the state of isolating switch 210; voice broadcaster 29 is used to determine whether to broadcast a voice message under the control of alarm relay 27 or isolating relay 28.

[0080] The working principle of main control unit 2 is as follows:

[0081] The vehicle emergency braking loop input line and output line are respectively connected to the normally closed contact of the alarm relay 27 (KA1) of the main control unit 2, and to the normally open contact of the isolation relay 28 (KA2) of the main control unit 2.

[0082] After the main control unit 2 is powered on, the power indicator light 23 (H1) will light up;

[0083] When the sensing unit 1 and the main control unit 2 are working normally, but the test vehicle does not trigger the infrared light of the sensing unit 1, the wireless signal transmitting module 14 of the sensing unit 1 will not send a wireless alarm signal, and the main control unit 2 will not react. This will keep the alarm relay 27 (KA1) contact of the main control unit 2 connected in series in the vehicle's emergency braking loop normally closed, thereby keeping the emergency braking safety circuit of the test vehicle connected.

[0084] When the wireless signal receiving module 26 receives a wireless alarm signal from the sensing unit 1 containing alarm information that the vehicle has crossed the safe area, it triggers the alarm relay 27 (KA1) to engage, thereby controlling the broadcast module to broadcast a voice message indicating that the vehicle has crossed the boundary; the alarm light 24 (H2) illuminates, indicating that the vehicle has crossed the safe area; and a self-locking circuit is formed between the normally open contact of the alarm relay 27 (KA1) and the normally closed contact of the isolation relay 28 (KA2) to ensure the stability of the wireless alarm signal; the voice alarm 29 of the main control unit 2 issues a voice alarm message that the vehicle has crossed the safe area to remind the driver of the vehicle status. At the same time, when the alarm relay 27 (KA1) is disconnected, the contact of the alarm relay 27 (KA1) connected in series in the vehicle's emergency braking loop is disconnected, the vehicle's emergency braking loop is disconnected, and the vehicle applies emergency braking to stop. The self-locking circuit works as follows: After the alarm relay 27 is energized, its normally open contact closes, and the current continuously supplies power to the coil of the alarm relay 27 through the holding circuit formed by the normally closed contact of the isolation relay 28 and the normally open contact of the alarm relay 27. This ensures that the alarm relay 27 remains energized even after the vehicle boundary crossing signal disappears, thus guaranteeing the stability of the alarm signal. When the isolating switch 210 is turned to the open position and the isolation relay 28 is energized, the normally closed contact of the isolation relay 28 opens, the self-locking circuit is released, and the alarm relay 27 is reset.

[0085] When the vehicle stops and needs to return to the safe area, the isolating switch 210 (SB1) is switched to the open position, the isolating relay 28 (KA2) is energized, and the broadcast module is controlled to broadcast the isolation status. The isolation indicator light 25 (H3) illuminates, indicating that the vehicle is in the isolated state. This restores the vehicle's emergency braking loop. After the vehicle returns to the safe area, the device is reset. At the same time, the alarm message from the voice alarm 29 that the vehicle has crossed the safe area stops, and the broadcast message that the device is isolated is activated. When the isolating relay 28 (KA2) is energized, the normally open contact of the isolating relay 28 (KA2) connected in series in the vehicle's emergency braking loop closes, the vehicle's emergency braking loop is re-established, and the driver can drive the train into the safe area. After the vehicle has completely entered the safe area, the isolating switch 210 (SB1) is reset, and the vehicle undergoes dynamic testing again.

[0086] The specific operational process of the intelligent safety protection device for preventing derailment of urban rail vehicles based on the present invention is as follows:

[0087] Installation: Sensor unit 1 is fixed at the safe braking position of the test line, and main control unit 2 is connected to the vehicle's emergency braking loop.

[0088] Standby: The power switch 21 of the main control unit 2 is turned on, the device self-test is normal, and the vehicle emergency braking loop remains open.

[0089] Boundary crossing detection: The vehicle triggers the infrared sensor 12 of the sensing unit 1, and the wireless signal transmitting module 14 of the sensing unit 1 sends a wireless alarm signal.

[0090] Alarm braking: The wireless signal receiving module 26 of the main control unit 2 receives the wireless alarm signal, the voice broadcaster 29 and the alarm light 24 sound and light alarm, cut off the vehicle emergency braking loop, and the vehicle brakes urgently.

[0091] Isolation Reset: Operate the isolation switch 210 of the main control unit 2 to restore the vehicle's emergency braking loop. After the vehicle returns to the safe zone, the reset device will be put back into operation for protection.

[0092] like Figure 6 As shown, the intelligent safety protection method for preventing derailment of urban rail vehicles based on dynamic clearance of the present invention is applicable to the intelligent safety protection device for preventing derailment of urban rail vehicles based on dynamic clearance of the present invention, and includes the following steps:

[0093] Step 1: The input line of the vehicle emergency braking loop is connected to the normally closed contact of the alarm relay 27 of the main control unit 2, and the output line of the vehicle emergency braking loop is connected to the normally open contact of the isolation relay 28 of the main control unit 2.

[0094] Step 2: When the test vehicle does not trigger the infrared light of sensor unit 1, the alarm relay 27 contacts of main control unit 2, which are connected in series in the vehicle's emergency braking loop, remain normally closed.

[0095] Step 3: When the wireless signal receiving module 26 receives a wireless alarm signal from the sensing unit 1 containing alarm information that the vehicle has crossed the safe area, it triggers the alarm relay 27 to engage, the alarm light 24 to illuminate, and a self-locking circuit is formed between the normally open contact of the alarm relay 27 and the normally closed contact of the isolation relay 28. The voice alarm 29 then issues a voice alarm message that the vehicle has crossed the safe area to remind the driver of the vehicle status. When the alarm relay 27 is disconnected, the contact of the alarm relay 27 connected in series in the vehicle's emergency braking loop is disconnected, the vehicle's emergency braking loop is broken, and the vehicle applies emergency braking to stop.

[0096] The self-locking circuit formed by the normally open contact of alarm relay 27 and the normally closed contact of isolation relay 28 works as follows: After alarm relay 27 is energized, its normally open contact closes, and current continuously supplies power to the coil of alarm relay 27 through the holding circuit formed by the normally closed contact of isolation relay 28 and the normally open contact of alarm relay 27. This ensures that alarm relay 27 remains energized even after the wireless boundary crossing signal disappears, thereby guaranteeing the stability of the alarm signal. When isolation switch 210 is turned to the open position and isolation relay 28 is energized, the normally closed contact of isolation relay 28 opens, the self-locking circuit is released, and alarm relay 27 is reset.

[0097] Step 4: When the vehicle stops and returns to the safe area, switch the isolation switch 210 to the open position, the isolation relay 28 will be activated, the vehicle's emergency braking circuit will be re-established, the isolation indicator light 25 will illuminate, the alarm message from the voice alarm 29 that the vehicle has crossed the safe area will stop, and the broadcast message that the device has been isolated will be displayed.

[0098] Step 5: After the vehicle enters the safe area, reset the isolation switch 210 and the vehicle will undergo dynamic testing again.

[0099] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A dynamic clearance anti-derailment intelligent safety protection device for urban rail vehicles, characterized in that, include: Sensing unit (1) and main control unit (2); The sensing unit (1) is installed next to the test line to detect the vehicle crossing signal using infrared sensing and wirelessly transmit the vehicle crossing signal to the main control unit (2). The main control unit (2) is installed in the driver's cab of the vehicle and is used to connect to the vehicle emergency braking loop. When the vehicle crosses the boundary signal, it cuts off the vehicle emergency braking loop and triggers the vehicle emergency braking. The main control unit (2) includes: a power supply module, an alarm module, an isolation module, and a broadcast module; the power supply module is connected to the alarm module, the isolation module, and the broadcast module respectively; the alarm module and the isolation module are connected to the broadcast module respectively; wherein: The power supply module is used to supply power to the alarm module, isolation module and broadcast module respectively; The alarm module is used to issue an alarm when it receives a signal that a vehicle has crossed the boundary. The isolation module is used to indicate when a vehicle is in an isolated state. The broadcast module is used to broadcast voice messages under the control of the alarm module and / or isolation module.

2. The intelligent safety protection device for preventing derailment of urban rail vehicles according to claim 1, characterized in that, The power module includes, in sequence: a power switch (21), a voltage conversion module (22), and a power indicator light (23). The power switch (21) is connected to the external power supply and is used to control the on / off state of the external power supply; the power indicator light (23) is used to indicate the on / off state of the external power supply. The voltage conversion module (22) is connected to the alarm module, the isolation module and the broadcast module respectively, and is used to convert the 220V external power supply to 24V and supply power to the alarm module, the isolation module and the broadcast module respectively.

3. The intelligent safety protection device for preventing derailment of urban rail vehicles according to claim 1, characterized in that, The alarm module includes: a wireless signal receiving module (26), an alarm light (24), and an alarm relay (27); the wireless signal receiving module (26) is connected to the alarm light (24) and the alarm relay (27) respectively; the alarm relay (27) is also connected to the broadcast module; The wireless signal receiving module (26) is used to receive the signal of the vehicle crossing the boundary emitted by the sensing unit (1); The warning light (24) is used to indicate whether the wireless signal receiving module (26) has received a signal that the vehicle has crossed the boundary; When the wireless signal receiving module (26) receives a signal that the vehicle has crossed the boundary, the alarm relay (27) controls the broadcasting module to broadcast an alarm voice.

4. The intelligent safety protection device for preventing derailment of urban rail vehicles according to claim 3, characterized in that, The isolation module includes: an isolation switch (210), an isolation indicator light (25), and an isolation relay (28); The disconnect switch (210) is connected to the disconnect indicator light (25) and the disconnect relay (28) respectively; the disconnect relay (28) is also connected to the broadcast module; The isolating switch (210) is used to open the vehicle when the vehicle needs to return to the safe area, so that the vehicle is in an isolated state, the emergency braking loop of the vehicle is restored, and the device is reset after the vehicle returns to the safe area. The isolation indicator light (25) is used to indicate whether the vehicle is in an isolated state; The isolation relay (28) is used to control the broadcast module to broadcast the isolation status when the vehicle is in an isolated state.

5. The intelligent safety protection device for preventing derailment of urban rail vehicles according to claim 4, characterized in that, The broadcast module includes a voice broadcaster (29); the voice broadcaster (29) is used to broadcast alarm voice messages or isolation status voice messages under the control of the alarm relay (27) or the isolation relay (28).

6. The intelligent safety protection device for preventing derailment of urban rail vehicles according to claim 5, characterized in that, In the main control unit (2): The alarm relay (27) is connected in series with the isolation relay (28) on the power supply line of the voice broadcaster (29); The isolation relay (28) is also separately installed on another power supply line of the voice broadcaster (29).

7. The intelligent safety protection device for preventing derailment of urban rail vehicles according to claim 5, characterized in that, In the main control unit (2): The alarm relay (27) and the isolation relay (28) are connected in parallel between the vehicle emergency braking loop input line and the vehicle emergency braking loop output line; The alarm relay (27) is also installed on the power supply line of the alarm light (24); The isolation relay (28) and the isolation indicator light (25) are connected in parallel; The disconnect switch (210) is connected in series with the disconnect relay (28) and then connected in parallel with the disconnect indicator light (25). The disconnect switch (210) is used to control the on / off state of the parallel circuit.

8. The intelligent safety protection device for preventing derailment of urban rail vehicles according to claim 7, characterized in that, The normally open contact of the alarm relay (27) and the normally closed contact of the isolation relay (28) form a self-locking circuit: after the alarm relay (27) is energized, its normally open contact closes, and the current continuously supplies power to the coil of the alarm relay (27) through the holding circuit formed by the normally closed contact of the isolation relay (28) and the normally open contact of the alarm relay (27), so that the alarm relay (27) remains energized after the vehicle boundary crossing signal disappears, thereby ensuring the stability of the alarm signal; when the isolation switch (210) is turned to the open position and the isolation relay (28) is energized, the normally closed contact of the isolation relay (28) is opened, the self-locking circuit is released, and the alarm relay (27) is reset.

9. The intelligent safety protection device for preventing derailment of urban rail vehicles with dynamic clearance as described in any one of claims 1-8, characterized in that, The sensing unit (1) includes: a solar power module (11), an infrared sensor (12), a wireless signal control relay (13), and a wireless signal transmission module (14); the solar power module (11) is connected to the infrared sensor (12), the wireless signal control relay (13), and the wireless signal transmission module (14) respectively; the infrared sensor (12), the wireless signal control relay (13), and the wireless signal transmission module (14) are connected in sequence; The solar power module (11) is used to provide power to the infrared sensor (12), the wireless signal control relay (13) and the wireless signal transmission module (14) respectively; the infrared sensor (12) is used to transmit the vehicle boundary crossing signal to the wireless signal transmission module (14); the wireless signal control relay (13) is used to control whether the infrared sensor (12) and the wireless signal transmission module (14) are working respectively; the wireless signal transmission module (14) is used to transmit the vehicle boundary crossing signal.

10. The intelligent safety protection device for preventing derailment of urban rail vehicles according to claim 9, characterized in that, In the sensing unit (1): the wireless signal control relay (13) is respectively installed on the power supply lines of the infrared sensor (12) and the wireless signal transmitting module (14).

11. A method for intelligent safety protection against derailment of urban rail vehicles with dynamic clearance, applicable to the intelligent safety protection device for preventing derailment of urban rail vehicles with dynamic clearance as described in claim 5 or 6, characterized in that, Includes the following steps: Step 1: The input line of the vehicle emergency braking loop is connected to the normally closed contact of the alarm relay (27) of the main control unit (2), and the output line of the vehicle emergency braking loop is connected to the normally open contact of the isolation relay (28) of the main control unit (2). Step 2: When the test vehicle does not trigger the infrared light of the sensing unit (1), the alarm relay (27) of the main control unit (2) connected in series in the vehicle emergency braking loop remains normally closed; Step 3: When the wireless signal receiving module (26) receives the vehicle boundary crossing signal sent by the sensing unit (1), it triggers the alarm relay (27) to close, the alarm light (24) lights up, and a self-locking circuit is formed through the normally open contact of the alarm relay (27) and the normally closed contact of the isolation relay (28). The voice alarm (29) issues a voice alarm message that the vehicle has crossed the safe area to remind the driver of the vehicle status. When the alarm relay (27) is disconnected, the normally closed contact of the alarm relay (27) connected in series in the vehicle emergency braking loop is disconnected, the vehicle emergency braking loop is disconnected, and the vehicle applies emergency braking to stop. Step 4: When the vehicle stops and needs to return to the safe area, turn the isolation switch (210) to the open position, the isolation relay (28) will be activated, the vehicle emergency braking loop will be re-established, the isolation indicator light (25) will light up, the alarm message that the vehicle has crossed the safe area issued by the voice alarm (29) will stop, and the broadcast message that the equipment has been isolated will be displayed. Step 5: After the vehicle enters the safe area, restore the isolation switch (210) and the vehicle will undergo dynamic testing again.

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