Reset and restart control circuit and method for vehicle-mounted signal system equipment

Abstract

The invention discloses a reset and restart control circuit of vehicle-mounted signal system equipment, which relates to the related field of rail transit signal processing technology, and comprises a main system reset and restart control circuit and a standby system reset and restart control circuit, wherein the primary circuit comprises a signal control host VOBC, a VOBC reset stopping device, a VOBC reset contactor, a cab activation relay, a VOBC reset button, a VOBC power supply circuit breaker and a reset control circuit breaker. The invention discloses a resetting and restarting control method for vehicle-mounted signal system equipment, which comprises the following steps: when a main system VOBC fault is detected, main and standby system VOBC redundancy switching is carried out, the main VOBC outputs a resetting stop level signal, and a main control end resetting contactor is controlled to be continuously not electrified through a resetting and restarting circuit; and the fault end reset contactor executes 0-1-0 action logic to realize power-off restart of the fault VOBC. According to the invention, VOBC self-resetting and restarting can be realized locally, and the resetting and restarting efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of rail transit signal processing technology, and in particular to a reset and restart control circuit and method for a base vehicle onboard signal system device. Background Technology

[0002] The rail transit signaling system plays a crucial role in subway train operation. To improve the reliability and operational efficiency of the signaling system, subway trains have adopted a dual-end redundant signaling system to achieve primary and backup redundancy. However, the prerequisite for primary and backup system switching is that both systems are in normal working order. In actual operation, when a system failure occurs, it is necessary to achieve rapid primary and backup takeover and timely reset and restart of the faulty onboard controller (VOBC) to achieve seamless primary and backup takeover. This avoids situations where passengers are trapped in the section due to VOBC failure, requiring emergency rescue, thereby improving the redundancy and reliability of the signaling system and ultimately improving train operation efficiency.

[0003] Therefore, to improve the efficiency of primary / backup switching, it is crucial to set up an onboard signal reset and restart circuit. This ensures that a timely reset and restart can be performed when a system fault occurs, enabling rapid primary / backup switching. Traditional subway train signaling systems use power-off restarts for reset and restart. This typically involves manually operating a reset button to control the simultaneous power-off restart of both VOBCs or using redundant interlocked power supplies for remote onboard restart. These methods require manual intervention to restart the signaling equipment or employ a primary system for vehicle control and a cold standby system for the backup system, which prolongs fault recovery time and reduces the efficiency of primary / backup redundancy switching. Summary of the Invention

[0004] To address the technical problems of the prior art, this application provides a reset and restart control circuit and method for vehicle-mounted signal system equipment. The main and backup reset and restart control circuits have the same structure, wherein the primary reset and restart control circuit includes: Signal control host VOBC, VOBC reset blocking relay, VOBC reset contactor, driver's cab activation relay, VOBC reset button, VOBC power supply circuit breaker and reset control circuit breaker.

[0005] The signal control host includes six ports: VOBC power supply input, local VOBC activation status retrieval port, remote VOBC activation status retrieval port, VOBC reset blocking command output port, VOBC self-reset signal command output port, and VOBC activation status command output port.

[0006] The VOBC power supply input of the signal control host is high level, connected in series with the normally closed contact of the VOBC reset contactor and the VOBC power supply circuit breaker. When the VOBC in this system fails, the VOBC reset contactor executes the '0-1-0' action logic, the normally closed contact of the VOBC reset contactor opens and closes again, realizing the power-off restart of the faulty VOBC. The local VOBC activation status retrieval port of the signal control host receives the activation command output by the VOBC activation status command output port, and senses the status of the primary and backup VOBC through the retrieval commands of the local and remote VOBC activation status retrieval ports, and judges the specific situation of the primary and backup VOBC based on the retrieval logic value. The VOBC reset prevention command output port of the signal control host is connected in series with the VOBC reset prevention relay. One branch of the VOBC self-reset signal command output port of the signal control host is connected in series with the normally closed contact of the VOBC reset prevention relay and the VOBC reset contactor, and the other branch is connected in series with the normally closed contact of the VOBC reset prevention relay and the VOBC reset contactor at the other end, which is used to realize the VOBC self-reset restart operation. One path of the reset control circuit breaker, the driver's cab activation relay, and the VOBC reset button is connected in series with the normally closed contact of the local prevention relay and the VOBC reset contactor, and the other branch is connected in series with the normally closed contact of the VOBC reset prevention relay and the VOBC reset contactor at the other end, which is used to realize the manual reset restart operation.

[0007] The primary and backup VOBC systems are redundantly interlocked, and they sense each other's status by activating the train lines. By dividing the system into primary and backup systems, the control logic outputs of each system differ. When a primary VOBC failure occurs, the backup VOBC detects that the primary VOBC's activation status is 0, automatically takes over the train, and outputs a self-reset signal and a reset prevention signal. This controls the system's reset contactor to remain inactive while the system's reset contactor activates, thus controlling the system's power supply circuit through the system's reset contactor logic.

[0008] The primary VOBC activation status command is 1, and the standby VOBC activation status command is 0. Under normal conditions, both the primary and standby VOBC output reset prevention commands are 0, the primary system controls the train, and the standby system is in standby mode. When a primary system fault occurs, the standby system takes over train control and becomes the primary system, outputting a reset prevention command 1 and a self-reset signal command pulse signal 0-1-0. The fault-end reset prevention command 0 and self-reset signal command 0 are also output. By resetting the train line, the primary control end reset contactor is de-energized, and the fault-end reset contactor 0-1-0 is controlled, thus achieving power-off and restart of the fault-end VOBC.

[0009] This invention provides a reset and restart control method for onboard signaling system equipment based on a reset and restart control circuit. The Vehicle Controllers (VOBCs) sense each other's status by activating the train lines. When the primary VOBC fails, the backup VOBC automatically takes over the train's protection and control in the current mode. To achieve seamless switching between the two VOBCs, the system can manually or automatically restart the faulty VOBC by activating the VOBC reset button in the driver's cab or by commanding a healthy VOBC to reset an unhealthy VOBC, ensuring both VOBC systems are in normal condition. The VOBC reset button can only reset VOBCs in an unhealthy state (power-off reset); VOBCs in a normal state will output a reset prevention command. When one VOBC has a health problem, the other VOBC automatically takes over the train and outputs a self-reset command to reset the faulty VOBC and prevent its own VOBC from resetting. If the automatic reset fails, the driver can use the reset button to redundantly reset the unhealthy VOBC. This method does not affect the train's normal protection and control, and ensures timely reset and restart in the event of a system failure, achieving rapid primary / backup switchover.

[0010] The present invention discloses the following technical effects: This invention provides a reset and restart control circuit and method for onboard signaling system equipment. It eliminates the need for ATS workstation intervention, allowing the primary and backup VOBCs to mutually sense each other's status by activating the train line. When a primary VOBC fault is detected, the primary and backup VOBCs perform redundancy switching. Simultaneously, the primary VOBC outputs a reset pulse signal and a reset blocking level signal. Through the designed reset and restart circuit, the primary control end reset contactor remains de-energized, while the faulty end reset contactor executes a 0-1-0 action logic, thus achieving a power-off restart function for the faulty VOBC. Additionally, a VOBC reset button is provided in the driver's cab, allowing the driver to manually reset and restart if the self-reset restart fails. This circuit design eliminates the need for remote ATS intervention, enabling VOBC self-reset and restart or manual restart locally, improving VOBC fault reset and restart efficiency. By combining remote or self-reset restart operations with manual VOBC reset and restart, rapid reset and restart of faulty VOBCs is achieved, reducing the probability of train breakdown rescue, passenger evacuation, and decommissioning, and improving the switching efficiency and train control reliability of the dual-end redundant signaling system. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below: Figure 1 This is a schematic diagram of the reset and restart control circuit of the vehicle signal system equipment provided in the embodiments of this application.

[0012] Explanation of reference numerals in the attached figures: VOBC: Signal Control Unit; CB12 / 22: VOBC power supply circuit breaker; CB11 / 21: Reset control circuit breaker; VOBCR1 / 2: VOBC reset blocking relay; ATCRK1 / 2: VOBC reset contactor; COR1 / 2: Driver's cab activation relay; RPB1 / 2: VOBC reset button; POW: VOBC power input; I1: Local VOBC activation status data acquisition; I2: Data acquisition of the active status of the peer's VOBC; O1: VOBC reset block instruction; O2: VOBC self-reset signal command; O3: VOBC activation status command; The red line indicates the direction of the self-reset signal in the circuit; the blue line indicates the direction of the manual reset signal in the circuit. Detailed Implementation

[0013] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application.

[0014] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description of this application will be provided in conjunction with the accompanying drawings. The described embodiments should not be considered as limitations on this application. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0015] In the following description, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or modules not explicitly listed or inherent to such processes, methods, products, or devices. 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 application belongs. The terminology used herein is for the purpose of describing embodiments of this application only.

[0016] This application provides a reset and restart control circuit for an on-board signal system device, such as... Figure 1 As shown: The control panel is equipped with VOBC reset buttons RPB1 / 2. The primary and backup VOBCs at both ends are hot-standby, with the power supply input POW at both ends at a high level, and only one VOBC is allowed to be used as the primary VOBC on the train. When the health status of the primary VOBC fails, the backup VOBC will automatically take over the protection and control of the train in the current mode. VOBC reset uses a power-off restart method; that is, when a faulty VOBC needs to be reset, the VOBC power supply input POW receives a "high-low-high" signal, achieving a reset and restart.

[0017] The local VOBC activation status I2 is obtained by tracking the remote VOBC activation status command O3 via the train line, while the local VOBC activation status I1 is also tracked by tracking the local VOBC activation status command O3. VOBCs mutually sense each other's status through local VOBC activation status tracking I1 and remote VOBC activation status tracking I2. The status of the primary and backup VOBCs includes the following situations: I1 = 1 and I2 = 0 indicates that the local VOBC is in control; I1 = 0 and I2 = 1 indicates that the remote VOBC is in control; I1 = 0 and I2 = 0 indicates that neither VOBC is controlling the vehicle; I1 = 1 and I2 = 1 indicates that both VOBCs are in control (abnormal, VOBC reports a fault).

[0018] The VOBC remote and self-reset restart operations are as follows: When a health problem occurs at the local VOBC1, the remote VOBC2 detects that the activation status feedback I2 of the local VOBC1 is 0. VOBC2 then automatically takes over the train and synchronously outputs a reset prevention command O1 of 1, a VOBC self-reset signal O2 outputting a 0-1-0 pulse, and a VOBC activation status command O3 of 1. This drives the VOBC2 reset prevention relay VOBCR2 to be energized. At the fault end, O1, O2, and O3 do not output, and VOBCR1 is not energized, its normally closed contact closes. When the main control end VOBCR2 is energized, its normally closed contact opens. Therefore, the VOBC2 reset contactor ATCRK2 is de-energized, and its normally closed contact closes. Through the VOBC2 self-reset signal command O2, the train reset line drives the fault end VOBC1 reset contactor ATCRK1 to execute 0-1-0 logic, with the normally closed contact of ATCRK1 closing-opening-closing. The POW input to the VOBC1 power supply port is 1-0-1, while the VOBC2 power supply port POW is 1, which has no effect. The system enables a power-off restart of the faulty VOBC1 without affecting the normal train control of VOBC2. Similarly, when VOBC2 fails, VOBC1 takes over the train normally and outputs the corresponding activation signal O3, self-reset signal O2, and reset prevention signal O1, thus enabling a power-off restart of VOBC2.

[0019] If the self-reset restart operation fails, a manual reset restart of the VOBC is performed. The operation process is as follows: When a health problem occurs at VOBC1, VOBC2 at the other end automatically takes over the train and performs the self-reset and restart operation described above on the faulty VOBC1. If the operation fails after multiple attempts, the onboard display shows that the VOBC reset has failed. The driver can operate the VOBC reset button RPB at the train activation end. Its normally open contact closes, the faulty VOBC1 is de-energized, and its normally closed contact closes. When the main control end VOBC2 is energized, the normally closed contact of VOBC2 opens. Therefore, the VOBC2 reset contactor ATCRK2 is de-energized, and the normally closed contact of ATCRK2 closes. Through the train reset line, the faulty VOBC1 reset contactor ATCRK1 is energized, and the normally closed contact of ATCRK1 opens. The POW of the VOBC1 power supply port is 0, and the POW of the VOBC2 power supply port is 1, which has no effect. After RPB2 is released, ATCRK1 is de-energized, the normally closed contact of ATCRK1 closes, and the POW of the VOBC1 power supply port is 1 again, thus realizing the power-off and restart of the faulty VOBC1. VOBC2 can still control the train normally without being affected. Similarly, when VOBC2 fails, VOBC1 takes over the train normally. The VOBC reset button RPB can be operated on the active end to power off and restart VOBC2.

[0020] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application. In some cases, the actions or steps described in this application can be performed in a different order than that shown in the embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require a specific or sequential order to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

Claims

1. A reset restart control circuit for a vehicle signal system device, characterized by comprising: The circuit comprises a main-backup system reset restart control circuit, and the main-backup system circuit structures are the same, wherein one system reset restart control circuit comprises: The signal control host VOBC, the VOBC reset prevention relay, the VOBC reset contactor, the cab activation relay, the VOBC reset button, the VOBC power supply circuit breaker and the reset control circuit breaker; The main system signal control host VOBC controls the VOBC reset prevention relay in the circuit to be powered on through the output of the self-reset signal instruction and the reset prevention instruction, and the VOBC reset contactor in the main system is de-energized, the VOBC reset contactor in the backup system is energized through the reset train line, and then the power supply of the VOBC in the main system is not affected, the VOBC in the backup system is restarted, so as to realize the power-off self-reset restart operation of the on-board signal system equipment; when the self-reset restart operation fails, the VOBC reset contactor in the main system is de-energized, the VOBC reset contactor in the backup system is energized through the reset control circuit breaker, the VOBC reset button at the activation end and the VOBC reset prevention relay in the main system, so as to realize the manual reset restart operation of the on-board signal system equipment.

2. The reset restart control circuit of the on-vehicle signal system device according to claim 1, wherein The signal control host comprises six ports, namely a VOBC power supply input port, a local VOBC activation state back sampling port, an opposite VOBC activation state back sampling port, a VOBC reset prevention instruction output port, a VOBC self-reset signal instruction output port and a VOBC activation state instruction output port; The VOBC power supply input port receives a power supply signal; the local VOBC activation state back sampling port is used for receiving a local activation state instruction output by the local VOBC activation state instruction output port, and the opposite VOBC activation state back sampling port is used for receiving an activation state instruction output by the opposite VOBC activation state instruction output port; the VOBC reset prevention instruction output port, the VOBC self-reset signal instruction output port and the VOBC activation state instruction output port are respectively used for outputting a reset prevention instruction, a VOBC self-reset signal instruction and a VOBC activation state instruction.

3. The reset restart control circuit of the in-vehicle signal system device according to claim 2, wherein The local VOBC activation state back sampling port of the signal control host receives an activation instruction output by the VOBC activation state instruction output port, and perceives the state of the main-backup system VOBC through the back sampling instructions of the local and opposite VOBC activation state back sampling ports, and judges the specific situation of the main-backup system VOBC according to the logical values of the back sampling instructions.

4. The reset restart control circuit of the in-vehicle signal system device according to claim 3, wherein The way of perceiving the state of the main-backup system VOBC according to the back sampling instructions of the local and opposite VOBC activation state back sampling ports is as follows: The local VOBC activation state back sampling port is 1, and the opposite VOBC activation state back sampling port is 0, which indicates that the local VOBC is in control; The local VOBC activation state back sampling port is 0, and the opposite VOBC activation state back sampling port is 1, which indicates that the opposite VOBC is in control, The local VOBC activation state back sampling port is 0, and the opposite VOBC activation state back sampling port is 0, which indicates that neither of the two VOBCs is in control, The local VOBC activation state back sampling port is 1, and the opposite VOBC activation state back sampling port is 1, which indicates that both of the two VOBCs are in control, which is an abnormal fault state. When the main and standby VOBC systems are normal, the main VOBC controls the train, and the standby VOBC is in standby state. When the main VOBC fails, the standby VOBC detects that the activation state of the main VOBC is 0, automatically takes over the train and outputs a self-reset signal and a reset prevention signal, and realizes self-reset restart operation of the faulty VOBC.

5. The reset restart control circuit of the on-vehicle signal system apparatus according to claim 2, wherein The VOBC reset prevention instruction output port of the signal control host is connected in series with a VOBC reset prevention relay, one branch of the VOBC self-reset signal instruction output port of the signal control host is connected in series with the VOBC reset prevention relay and a VOBC reset contactor, and is connected in series with the normally closed contact of the VOBC reset prevention relay of the opposite end and the VOBC reset contactor, for realizing VOBC self-reset restart operation; one branch of the reset control circuit breaker, the driver's cabin activation relay and the VOBC reset button is connected in series with the normally closed contact of the prevention relay of the opposite end and the VOBC reset contactor, and the other branch is connected in series with the normally closed contact of the VOBC reset prevention relay of the opposite end and the VOBC reset contactor, for realizing manual reset restart operation.

6. The reset-restart control circuit of the on-vehicle signal system apparatus according to claim 1, wherein The main and standby VOBCs in the reset restart control circuit are redundant interlocks, which perceive the state of the opposite end through the activation train line; through division of the main and standby VOBCs, the control logic state output by each VOBC is different, when the main VOBC fails, the standby VOBC detects that the activation state of the main VOBC is 0, automatically takes over the train and outputs a self-reset signal and a reset prevention signal, controls the reset contactor of the own VOBC not to act and the reset contactor of the opposite VOBC to act, and realizes control of the power supply circuit of the opposite VOBC through the logic of the reset contactor of the opposite VOBC.

7. The reset restart control circuit of the in-vehicle signal system device according to claim 6, wherein The activation state instruction of the main VOBC is 1, and the activation state instruction of the standby VOBC is 0; in the normal state, the reset prevention instructions output by the main and standby VOBCs are both 0, the main VOBC controls the train, and the standby VOBC is in standby state. When the main VOBC fails, the standby VOBC takes over the train control to become the main VOBC, and outputs a reset prevention instruction 1 and a self-reset signal instruction pulse signal 0-1-0, the reset prevention instruction of the faulty end is 0, and the self-reset signal instruction of the faulty end is 0, through the reset train line, the reset contactor of the main control end is controlled not to be powered, and the reset contactor of the faulty end is controlled 0-1-0, to realize power-off restart of the faulty VOBC.

8. The reset-restart control circuit of the on-vehicle signal system apparatus according to claim 1, wherein When the self-reset restart operation fails, the VOBC reset button of the activation end is pressed, the main VOBC outputs a reset prevention signal, the reset prevention relay is powered, the reset contactor of the main VOBC is controlled not to be powered, and the reset contactor of the standby VOBC is powered, to realize manual reset restart operation of the on-board signal system equipment.

9. A reset restart control method of a vehicle-mounted signal system device, characterized by, The method is realized based on the reset restart control circuit of the on-board signal system equipment according to any one of claims 1-8, and the method comprises: The VOBCs perceive each other's state by activating the train line, when the main VOBC fails, the standby VOBC will automatically take over the protection and control of the train in the current mode; the VOBC reset button at the cab end or the healthy VOBC automatically resets the unhealthy VOBC, thereby realizing manual or automatic restart of the faulty VOBC locally; the VOBC reset button only performs power-off reset operation on the unhealthy VOBC, and the VOBC in the normal state outputs a reset prevention instruction to prevent the VOBC at the main control end from being reset; when one VOBC has a health problem, the other VOBC automatically takes over the train and outputs a self-reset instruction to reset the faulty VOBC and prevent the VOBC at the local end from being reset; when automatic reset fails, the driver activates the reset button at the end to realize redundant reset of the unhealthy VOBC, thereby realizing quick switching and takeover of the main and standby.

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