阅读说明：本技术 一种动车组停放制动冗余监控装置及监控方法 (Motor train unit parking brake redundancy monitoring device and monitoring method ) 是由 马永靖 郑魏婧 张笑凡 李松 马兵 于 2021-09-29 设计创作，主要内容包括：一种动车组停放制动冗余监控装置及监控方法,涉及轨道交通技术领域,解决现有动车组停放制动缺少冗余监控方式触发紧急制动停车的问题,该装置安装在每辆装有停放制动装置的车辆上；包括总风管、停放制动控制单元、停放制动监控单元、停放制动检测装置、冗余停放制动检测装置、停放制动施加指令线、停放制动缓解指令线、停放制动监控环路、紧急制动安全环路、列车网络控制系统和显示屏。本发明在列车中某一辆车停放制动监控单元故障或出现网络通讯故障时,通过定义好的伙伴车接管该车停放制动监控功能。该停放制动冗余监控装置及其监控方法直接有效,并可准确定位故障车辆并在显示屏报出故障信息,为动车组停放制动监控提供了冗余方案。(A redundant monitoring device and a monitoring method for parking brake of a motor train unit relate to the technical field of rail transit and solve the problem that the parking brake of the motor train unit lacks a redundant monitoring mode to trigger emergency brake parking; the system comprises a main air pipe, a parking brake control unit, a parking brake monitoring unit, a parking brake detection device, a redundant parking brake detection device, a parking brake application instruction line, a parking brake release instruction line, a parking brake monitoring loop, an emergency brake safety loop, a train network control system and a display screen. When a certain parking brake monitoring unit in the train has a fault or a network communication fault occurs, the parking brake monitoring function is taken over by a defined partner train. The parking brake redundancy monitoring device and the monitoring method thereof are direct and effective, can accurately position the fault vehicle and report the fault information on the display screen, and provide a redundancy scheme for the parking brake monitoring of the motor train unit.)

1. A redundant monitoring device for the parking brake of a motor train unit is arranged on each vehicle provided with a parking brake device; the device comprises a main air pipe, a parking brake control unit, a parking brake monitoring unit, a parking brake detection device, a redundant parking brake detection device, a parking brake application instruction line, a parking brake release instruction line, a parking brake monitoring loop, an emergency brake safety loop, a train network control system and a display screen; the method is characterized in that:

the main air pipe penetrates through the whole train and is connected with an air inlet of each parking brake control unit in the train to provide compressed air for relieving parking brake;

the parking brake control unit is provided with an air inlet, an air outlet, a parking brake relieving command electrical interface and a parking brake applying command electrical interface;

the air outlet of the parking brake control unit is connected with the air path interface of the parking brake device, and the air outlet is communicated with the atmosphere;

the parking brake control unit is connected with the parking brake release instruction electrical interface and the parking brake application instruction electrical interface;

when the parking brake control unit receives a parking brake application command line command, compressed air in the parking brake device is exhausted through the air outlet, and a spring in the parking brake device outputs parking brake force; when the parking brake control unit receives a parking brake release instruction line instruction, compressed air is filled into the parking brake device through the air outlet;

the parking brake detection device and the redundant parking brake detection device are both provided with an air path interface and an output electric signal interface;

the air channel interfaces of the parking brake detection device and the redundant parking brake detection device are connected with the pipeline between the parking brake control unit and the parking brake device to detect the parking brake pressure in the parking brake device; the parking brake detection device and the redundant parking brake detection device convert parking brake pressure into electric signals to be output;

the parking brake detection device feeds the output parking brake pressure electrical signal back to the parking brake monitoring unit;

the redundant parking brake detection device simultaneously feeds back the output parking brake pressure electric signal to the parking brake monitoring unit and the train network control system;

the parking brake monitoring unit is provided with a parking brake state detection signal input electrical interface, a parking brake state redundancy detection signal input electrical interface, a disconnected parking brake monitoring loop output signal electrical interface and a network interface;

the parking brake state detection signal input electrical interface of the parking brake monitoring unit is connected with the output electrical signal interface of the parking brake detection device, and the parking brake state redundancy detection signal input electrical interface is connected with the output electrical signal interface of the redundancy parking brake detection device and used for receiving a parking brake state signal;

the electric interface of the output signal of the disconnected parking brake monitoring loop of the parking brake monitoring unit is connected with the parking brake monitoring loop and is used for disconnecting the parking brake monitoring loop;

the network interface of the parking brake monitoring unit is connected with a train network control system and is used for receiving parking brake pressure electric signals and train speed signals output by the redundant parking brake detection devices of other vehicles in the train; meanwhile, sending the parking brake state information and parking brake fault diagnosis information to the train network control system through the network interface;

the parking brake monitoring unit diagnoses by receiving a parking brake pressure electric signal and a train speed signal, and immediately outputs an electric signal to disconnect a parking brake monitoring loop when a parking brake is diagnosed to be in an applied state in the running of a train, and simultaneously sends parking brake fault diagnosis information to a train network control system through a network interface;

the parking brake monitoring loop is connected with each parking brake monitoring unit in the train and is controlled by the parking brake monitoring unit;

the parking brake monitoring loop is connected with the emergency brake safety loop of the train, and when the parking brake monitoring loop is disconnected, the emergency brake safety loop is controlled to be disconnected, and emergency brake stopping is triggered;

the display screen is connected with the train network control system and used for displaying parking brake state information and fault information and prompting a driver.

2. The device of claim 1 for monitoring parking brake redundancy of a motor train unit, wherein:

when the parking brake control unit receives a parking brake release instruction line instruction, 600kPa compressed air is filled into the parking brake device through the air outlet, and the spring force in the parking brake device is overcome to release the parking brake;

when the parking brake control unit receives a parking brake application command line command, compressed air in the parking brake device is exhausted through the air outlet, or an air supply pipeline of the parking brake device leaks, and a spring in the parking brake device outputs parking brake force.

3. The motor train unit parking brake redundancy monitoring device according to claim 2, characterized in that:

the parking brake detection device is a pressure sensor, the redundant parking brake detection device is a pressure switch, when the parking brake pressure is detected to be less than 480kPa, the parking brake is in an applying state, and when the parking brake pressure is detected to be greater than or equal to 480kPa, the parking brake is in a relieving state; 480kPa is the minimum pressure to overcome the spring force in the parking brake.

4. A method for monitoring parking brake redundancy of a motor train unit is characterized by comprising the following steps: the monitoring method is realized based on the parking brake redundancy monitoring device of the motor train unit according to claim 1; the monitoring method comprises the steps of parking brake redundant monitoring of the vehicle and parking brake redundant monitoring of a partner vehicle;

the specific process of the parking brake redundancy monitoring of the vehicle comprises the following steps:

the parking brake monitoring unit preferentially uses the parking brake pressure electrical signal fed back by the parking brake detection device, and when the parking brake detection device fails, the parking brake monitoring unit diagnoses the parking brake state of the vehicle by adopting the parking brake pressure electrical signal and the train speed signal detected by the redundant parking brake detection device; when the parking brake of the vehicle is diagnosed to be in an applied state in the running process of the train, an electric signal is immediately output to disconnect a parking brake monitoring loop, so that an emergency brake safety loop is disconnected, and the emergency brake is triggered to stop; meanwhile, fault diagnosis information applied by parking brake accidents is sent to a train network control system, and fault information applied by the parking brake accidents of the vehicle is reported on a display screen to prompt a driver;

the specific process of the partner vehicle parking brake redundancy monitoring is as follows:

defining two vehicles provided with parking brake devices in the trains as fellows, and respectively acquiring parking brake pressure network signals detected by the redundant parking brake detection device of the opposite side by the two vehicles through a train network control system;

when the train network control system diagnoses that one parking brake monitoring unit in the partner vehicle has a fault or the parking brake monitoring unit has a communication fault with the train network control system, the vehicle is called as a fault vehicle; another vehicle in the partner vehicle takes over to monitor the parking brake state of the fault vehicle, and the specific process is as follows:

the other parking brake monitoring unit in the partner vehicle acquires a parking brake pressure network signal and a train speed signal detected by the fault vehicle redundant parking brake detection device from the train network control system through the network interface, and diagnoses the parking brake state of the fault vehicle; when the parking brake of the fault car is diagnosed to be in an applied state in the running process of the train, an electric signal is immediately output to disconnect a parking brake monitoring loop, and further an emergency brake safety loop is disconnected to trigger the emergency brake to stop; meanwhile, fault diagnosis information accidentally applied by parking brake is sent to a train network control system;

and the train network control system receives the parking brake accidental application fault diagnosis information reported by another one of the partner cars, and reports the fault information of the accidental application of the parking brake of the fault car on the display screen according to the defined partner car.

5. The method for monitoring parking brake redundancy of the motor train unit according to claim 4, wherein the method comprises the following steps: normally, the parking brake monitoring unit diagnoses failure information of accidental application of parking brakes when the following conditions are satisfied:

(1) the running speed of the train is more than or equal to 5 km/h;

(2) the parking brake detection device detects that the parking brake pressure is less than 480 kPa.

6. The method for monitoring parking brake redundancy of the motor train unit according to claim 4, wherein the method comprises the following steps: and under the condition of failure, carrying out parking brake redundant monitoring on the vehicle, and when the following conditions are met, diagnosing failure information applied by the parking brake monitoring unit:

(1) the running speed of the train is more than or equal to 5 km/h;

(2) the pressure electric signal output by the parking brake detection device is invalid;

(3) the redundant parking brake detection device detects that the parking brake pressure is less than 480 kPa.

7. The method for monitoring parking brake redundancy of the motor train unit according to claim 4, wherein the method comprises the following steps: if the train network control system diagnoses that the parking brake monitoring unit of the No. 1 vehicle has a fault or the parking brake monitoring unit of the No. 1 vehicle has a communication fault with the train network control system; when the following conditions are met, the parking brake monitoring unit No. 2 diagnoses the fault information that the parking brake of the fault car No. 1 is applied accidentally:

(1) the running speed of the train is more than or equal to 5 km/h;

(2) the train network control system diagnoses the fault of the No. 1 parking brake monitoring unit or the communication fault of the No. 1 parking brake monitoring unit and the train network control system;

(3) the redundant parking brake detection device of the No. 1 vehicle detects that the parking brake pressure is less than 480 kPa.

Technical Field

The invention relates to the technical field of rail transit, in particular to a device and a method for monitoring parking brake redundancy of a motor train unit.

Background

Parking brake is the most effective means for ensuring the motor train unit to keep still on a certain slope, the parking brake is exerted by spring force in the parking brake device, and the parking brake can be relieved by overcoming the spring force through compressed air. Therefore, under the condition that the motor train unit is not supplied with compressed air, the parking brake can ensure that the motor train unit can be safely parked on the ramp for a long time. The motor train unit charges the compressed air into the parking brake device to relieve the parking brake force, and as the parking brake force is larger, if the parking brake is applied accidentally (such as the parking brake pipeline is damaged and leaked) in the running of the motor train unit, the basic brake part is seriously damaged, so the safety of the parking brake function of the motor train unit is the basic guarantee for the safe running of the train.

At present, a motor train unit is generally provided with a parking brake monitoring unit on a vehicle with a parking brake device, the parking brake state is confirmed by detecting the pressure of compressed air input into the parking brake device, if the parking brake of the motor train unit is in an applied state during running, the motor train unit immediately controls and triggers emergency brake to stop, parking brake state information and fault diagnosis information are sent to a motor train network control system, and the parking brake state information and the fault diagnosis information are displayed on a driver display screen.

When the parking brake monitoring unit of the vehicle has faults (such as electric element faults and power supply faults), the emergency brake cannot be triggered under effective control, so that the monitoring function is invalid. When the communication fault occurs between the vehicle parking brake monitoring unit and the train network control system, the parking brake state information and the fault diagnosis information cannot be correctly displayed on the driver display screen. The situation is more serious if two kinds of faults are superimposed. At present, a redundant monitoring mode is lacked in the parking brake of the motor train unit.

Disclosure of Invention

The invention provides a redundant monitoring device and a monitoring method for parking brake of a motor train unit, aiming at solving the problem that the existing motor train unit parking brake lacks a redundant monitoring mode to trigger emergency brake parking, and ensuring that the monitoring function of parking brake of a motor train unit can be still realized when a parking brake monitoring unit of a motor train unit vehicle fails or communication failure occurs with a train network control system, so that the safety performance of the train is improved.

A redundant monitoring device for the parking brake of a motor train unit is arranged on each vehicle provided with a parking brake device; the system comprises a main air pipe, a parking brake control unit, a parking brake monitoring unit, a parking brake detection device, a redundant parking brake detection device, a parking brake application instruction line, a parking brake release instruction line, a parking brake monitoring loop, an emergency brake safety loop, a train network control system and a display screen.

The main air pipe penetrates through the whole train and is connected with each parking brake control unit in the train to provide compressed air for relieving parking brake;

the parking brake control unit is provided with an air inlet, an air outlet, a parking brake relieving instruction electrical interface and a parking brake applying instruction electrical interface;

the air inlet of the parking brake control unit is connected with the main air pipe, the air outlet is connected with the air passage interface of the parking brake device, and the air outlet is communicated with the atmosphere;

the parking brake control unit is connected with the parking brake release instruction electrical interface and the parking brake application instruction electrical interface;

when the parking brake control unit receives a parking brake application command line command, compressed air in the parking brake device is exhausted through the air outlet, and a spring in the parking brake device outputs parking brake force; when the parking brake control unit receives a parking brake release instruction line instruction, compressed air is filled into the parking brake device through the air outlet, and the spring force in the parking brake device is overcome to release the parking brake;

the parking brake detection device and the redundant parking brake detection device are provided with an air path interface and an output electric signal interface;

the air channel interfaces of the parking brake detection device and the redundant parking brake detection device are connected with the pipeline between the parking brake control unit and the parking brake device to detect the parking brake pressure in the parking brake device; the parking brake detection device and the redundant parking brake detection device convert parking brake pressure into electric signals to be output;

the parking brake detection device feeds the output parking brake pressure electrical signal back to the parking brake monitoring unit;

the redundant parking brake detection device simultaneously feeds back the output parking brake pressure electric signal to the parking brake monitoring unit and the train network control system;

the parking brake monitoring unit is provided with a parking brake state detection signal input electrical interface, a parking brake state redundancy detection signal input electrical interface, a disconnected parking brake monitoring loop output signal electrical interface and a network interface.

The parking brake state detection signal input electrical interface of the parking brake monitoring unit is connected with the output electrical signal interface of the parking brake detection device, and the parking brake state redundancy detection signal input electrical interface is connected with the output electrical signal interface of the redundancy parking brake detection device and used for receiving a parking brake state signal;

the electric interface of the output signal of the disconnected parking brake monitoring loop of the parking brake monitoring unit is connected with the parking brake monitoring loop and is used for disconnecting the parking brake monitoring loop;

and the network interface of the parking brake monitoring unit is connected with a train network control system and is used for receiving parking brake pressure electric signals, train speed signals and the like output by the redundant parking brake detection devices of other vehicles in the train. Meanwhile, the parking brake state information and the parking brake fault diagnosis information of the vehicle are sent to the vehicle network control system through the network interface.

The parking brake monitoring unit diagnoses by receiving a parking brake pressure electrical signal, a train speed signal and the like, and immediately outputs an electrical signal to disconnect a parking brake monitoring loop when the parking brake is diagnosed to be in an applied state in the running of the train, and simultaneously sends parking brake fault diagnosis information to a train network control system through a network interface;

the parking brake monitoring loop is connected with each parking brake monitoring unit in the train and is controlled by the parking brake monitoring unit;

the parking brake monitoring loop is connected with the emergency brake safety loop of the train, and when the parking brake monitoring loop is disconnected, the emergency brake safety loop is controlled to be disconnected, and emergency brake stopping is triggered;

the display screen is connected with the train network control system and used for displaying parking brake state information and fault information and prompting a driver.

A method for monitoring parking brake redundancy of a motor train unit comprises the steps of monitoring parking brake redundancy of a motor train unit and monitoring parking brake redundancy of a partner vehicle;

the specific process of the parking brake redundancy monitoring of the vehicle comprises the following steps: the parking brake monitoring unit preferentially uses the parking brake pressure electrical signal fed back by the parking brake detection device, and when the parking brake detection device fails, the parking brake monitoring unit diagnoses the parking brake state of the vehicle by adopting the parking brake pressure electrical signal and the train speed signal detected by the redundant parking brake detection device; when the parking brake of the vehicle is diagnosed to be in an applied state in the running process of the train, an electric signal is immediately output to disconnect a parking brake monitoring loop, so that an emergency brake safety loop is disconnected, and the emergency brake is triggered to stop; meanwhile, fault diagnosis information applied by parking brake accident is sent to a train network control system, and fault information applied by the parking brake accident of the vehicle is reported on a display screen to prompt a driver.

The specific process of the partner vehicle parking brake redundancy monitoring is as follows: defining two vehicles provided with parking brake devices in the trains as fellows, and respectively acquiring parking brake pressure network signals detected by the redundant parking brake detection device of the opposite side by the two vehicles through a train network control system;

when the train network control system diagnoses that one parking brake monitoring unit in the partner vehicle has a fault or the parking brake monitoring unit has a communication fault with the train network control system, the vehicle is called as a fault vehicle; another vehicle in the partner vehicle takes over to monitor the parking brake state of the fault vehicle, and the specific process is as follows:

the other parking brake monitoring unit in the partner vehicle acquires a parking brake pressure network signal and a train speed signal detected by the fault vehicle redundant parking brake detection device from the train network control system through the network interface, and diagnoses the parking brake state of the fault vehicle; when the parking brake of the fault car is diagnosed to be in an applied state in the running process of the train, an electric signal is immediately output to disconnect a parking brake monitoring loop, and further an emergency brake safety loop is disconnected to trigger the emergency brake to stop; and simultaneously transmitting fault diagnosis information of unexpected application of the parking brake to the train network control system.

And the train network control system receives the parking brake accidental application fault diagnosis information reported by another one of the partner cars, and reports the fault information of the accidental application of the parking brake of the fault car on the display screen according to the defined partner car.

The invention has the beneficial effects that:

according to the device and the method for monitoring the parking brake redundancy of the motor train unit, when a parking brake monitoring unit of a certain train fails or a network communication failure occurs in the train, the parking brake monitoring function of the train can be taken over by a defined partner train. The parking brake redundancy monitoring device and the monitoring method thereof are direct and effective, can accurately position the fault vehicle and report the fault information on the display screen, provide a redundancy scheme for the parking brake monitoring of the motor train unit, make up the technical blank that the motor train unit does not have the parking brake redundancy monitoring, and can further improve the safety performance of the running of the train.

The monitoring method can still continue to monitor the parking brake state of a certain vehicle in the train when a parking brake monitoring unit in the train has a fault or a network communication fault occurs, can automatically trigger emergency braking to stop if the parking brake is applied accidentally during running, and sends parking brake state information and fault diagnosis information to the train network control system to be displayed on a driver display screen, so that the running safety performance of the train is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a parking brake redundancy monitoring device for a motor train unit according to the present invention;

FIG. 2 is a schematic diagram of a parking brake control unit in the parking brake redundancy monitoring device of the motor train unit according to the present invention.

FIG. 3 is a schematic diagram of a parking brake monitoring unit in the parking brake redundancy monitoring apparatus for the motor train unit according to the present invention.

FIG. 4 is a schematic diagram of a parking brake detection device and a redundant parking brake detection device in the parking brake redundant monitoring device of the motor train unit according to the present invention.

FIG. 5 is a schematic diagram of a parking brake device in the redundant monitoring device for parking brake of the motor train unit according to the present invention.

In the figure: 1. a main air pipe, 2, a parking brake control unit, 3, a parking brake device, 4, a parking brake monitoring unit, 5, a parking brake detection device, 6, a redundant parking brake detection device, 7, a parking brake application instruction line, 8, a parking brake release instruction line, 9, a parking brake monitoring loop, 10, an emergency brake safety loop, 11, a train network control system, 12, a display screen, 13, an air inlet, 14, an air outlet, 15, an air outlet, 16, a parking brake release instruction electrical interface, 17, a parking brake application instruction electrical interface, 18, a parking brake state detection signal input electrical interface, 19, a parking brake state redundant detection signal input electrical interface, 20, a disconnected parking brake monitoring loop output signal electrical interface, 21, a network interface, 22, a parking brake detection device/redundant parking brake detection device air path interface, 23. and the parking brake detection device/the redundant parking brake detection device outputs an electrical signal interface, and 24, a parking brake device air path interface.

Detailed Description

In a first embodiment, a parking brake redundancy monitoring device for a motor train unit is described with reference to fig. 1 to 5. The specific implementation mode is as follows:

each vehicle with a parking brake device 3 is provided with a set of same parking brake redundant monitoring devices, which comprise a main air pipe 1, a parking brake control unit 2, a parking brake monitoring unit 4, a parking brake detection device 5, a redundant parking brake detection device 6, a parking brake application instruction line 7, a parking brake release instruction line 8, a parking brake monitoring loop 9, an emergency brake safety loop 10, a train network control system 11 and a display screen 12.

The main air pipe 1 penetrates through the whole train and is connected with each parking brake control unit 2 in the train to provide compressed air for relieving parking brake;

the parking brake control unit 2 is provided with an air inlet 13, an air outlet 14, an air outlet 15, a parking brake release instruction electrical interface 16 and a parking brake application instruction electrical interface 17;

an air inlet 13 of the parking brake control unit is connected with the main air pipe 1, an air outlet 14 is connected with an air passage interface 24 of the parking brake device, and an air outlet 15 is communicated with the atmosphere;

the parking brake control unit parking brake release instruction electrical interface 16 is connected with a parking brake release instruction line 8, and the parking brake application instruction electrical interface 17 is connected with a parking brake application instruction line 7;

when the parking brake control unit 2 receives the instruction of the parking brake application instruction line 7, the compressed air in the parking brake device 3 is exhausted through the air outlet 15, and the spring in the parking brake device 3 outputs the parking brake force; when the parking brake control unit 2 receives the instruction of the parking brake release instruction line 8, compressed air is filled into the parking brake device 3 through the air outlet 14, and the parking brake is released by overcoming the spring force in the parking brake device 3;

the parking brake detection device 5 and the redundant parking brake detection device 6 are provided with an air path interface 22 and an output electric signal interface 23;

the air path interfaces 22 of the parking brake detection device 5 and the redundant parking brake detection device 6 are connected with the pipelines between the parking brake control unit 2 and the parking brake device 3 to detect the parking brake pressure in the parking brake device 3; the parking brake detection device 5 and the redundant parking brake detection device 6 convert the parking brake pressure into electric signals to be output;

the parking brake detection device 5 feeds back the output parking brake pressure electrical signal to the parking brake monitoring unit 4;

the redundant parking brake detection device 6 simultaneously feeds back the output parking brake pressure electrical signals to the parking brake monitoring unit 4 and the train network control system 11;

the parking brake monitoring unit 3 has a parking brake state detection signal input electrical interface 18, a parking brake state redundancy detection signal input electrical interface 19, a disconnected parking brake monitoring loop output signal electrical interface 20 and a network interface 21.

The parking brake state detection signal input electrical interface 18 of the parking brake monitoring unit 3 is connected with the output electrical signal interface 23 of the parking brake detection device 5, and the parking brake state redundant detection signal input electrical interface 19 is connected with the output electrical signal interface 23 of the redundant parking brake detection device 6 and is used for receiving a parking brake state signal;

the disconnected parking brake monitoring loop output signal electrical interface 20 of the parking brake monitoring unit 3 is connected with the parking brake monitoring loop 9 and is used for disconnecting the parking brake monitoring loop 9;

the network interface 21 of the parking brake monitoring unit 3 is connected with the train network control system 11, and is configured to receive parking brake pressure electrical signals and train speed signals detected by the redundant parking brake detection device 6 of other vehicles in the train, and send parking brake state information and fault diagnosis information of the vehicle to the train network control system 11 through the network interface 21.

The parking brake monitoring unit 3 diagnoses by the received parking brake pressure electric signal and the train speed signal, and when the parking brake is diagnosed to be in an applied state in the running process of the train, the parking brake monitoring unit immediately outputs an electric signal to disconnect the parking brake monitoring loop 9 and simultaneously sends parking brake fault diagnosis information to the train network control system 11 through the network interface;

the parking brake monitoring loop 9 is connected with each parking brake monitoring unit 3 in the train and is controlled by the parking brake monitoring unit 3;

the parking brake monitoring loop 9 is connected with a train emergency brake safety loop 10, and when the parking brake monitoring loop 9 is disconnected, the emergency brake safety loop 10 is controlled to be disconnected, and emergency brake stopping is triggered.

The display screen 12 is connected with the train network control system 11 and is used for displaying the parking brake state and the fault diagnosis information and prompting a driver.

In this embodiment, when the parking brake control unit 2 receives the instruction of the parking brake release instruction line 8, 600kPa compressed air is charged into the parking brake device 3 through the air outlet 14, so as to overcome the spring force in the parking brake device 3 to release the parking brake; when the parking brake control unit 2 receives the instruction of the parking brake application instruction line 7, compressed air in the parking brake device 3 is exhausted through the air outlet 15, or an air supply pipeline of the parking brake device leaks, and a spring in the parking brake device 3 outputs parking brake force.

In this embodiment, the parking brake detection device 5 is a pressure sensor, the redundant parking brake detection device 6 is a pressure switch, when detecting that the parking brake pressure is less than 480kPa, it indicates that the parking brake is in an applied state, and when detecting that the parking brake pressure is greater than or equal to 480kPa, it indicates that the parking brake is in a released state; 480kPa is the minimum pressure to completely overcome the spring force in the parking brake.

In a second embodiment, the second embodiment is described with reference to fig. 1 to 5, and the second embodiment is a monitoring method of a parking brake redundancy monitoring device for a motor train unit according to the first embodiment, and the method includes parking brake redundancy monitoring of the motor train unit and parking brake redundancy monitoring of a partner vehicle.

The parking brake redundant monitoring of the vehicle is exemplified by the vehicle No. 1 in the train shown in the figure 1, the parking brake monitoring unit 4 preferentially uses the parking brake pressure electrical signal fed back by the parking brake detection device 5, and when the parking brake detection device No. 1 fails, the parking brake monitoring unit 4 diagnoses the parking brake state of the vehicle by adopting the parking brake pressure electrical signal detected by the redundant parking brake detection device 6; when the parking brake of the No. 1 vehicle is diagnosed to be in an applied state in the running process of the train, an electric signal is immediately output to disconnect the parking brake monitoring loop 9, further disconnect the emergency brake safety loop 10 and trigger the emergency brake to stop; meanwhile, the fault diagnosis information applied by the parking brake of the No. 1 vehicle accidentally is sent to the train network control system 11, and the fault information applied by the parking brake of the vehicle accidentally is reported on a display screen to prompt a driver.

The redundant monitoring of the parking brake of the partner car is exemplified by the car No. 1 and the car No. 2 in the train shown in the figure 1, the car No. 1 and the car No. 2 in the train are defined as a pair of fixed 'partner cars', and the car No. 1 and the car No. 2 respectively obtain parking brake pressure network signals detected by the redundant parking brake detection device 6 of the opposite side through the train network control system 11;

when the train network control system 11 diagnoses that the parking brake monitoring unit 4 of the car No. 1 has a fault or the parking brake monitoring unit 4 of the car No. 1 has a communication fault with the train network control system 11, the car No. 2 of the partner car of the car No. 1 takes over to monitor the parking brake state of the car No. 1, and the specific process is as follows:

the No. 2 parking brake monitoring unit 4 obtains the parking brake pressure network signal and the train speed signal detected by the No. 1 redundant parking brake detection device 6 from the train network control system 11 through the network interface 21 for diagnosis, and when the following conditions are met, the No. 2 parking brake monitoring unit diagnoses the fault information applied by the No. 1 parking brake accident:

(1) the train is in a non-static state;

(2) the train network control system 11 diagnoses the fault of the No. 1 parking brake monitoring unit 4 or the communication fault of the No. 1 parking brake monitoring unit 4 and the train network control system 11;

(3) the redundant parking brake detection device 6 of the No. 1 vehicle detects that the parking brake is in an applied state;

the train network control system 11 receives the fault diagnosis information of the accidental application of the parking brake of the No. 1 vehicle reported by the No. 2 vehicle, and displays the fault information of the accidental application of the parking brake of the No. 1 vehicle on the display screen 12 according to the defined fellow vehicle. .

In this embodiment, under normal conditions, the parking brake monitoring unit 4 diagnoses the parking brake state of the vehicle by receiving the parking brake pressure electrical signal and the train speed signal output by the parking brake detection device 5; when the following conditions are met, the parking brake is diagnosed to be applied accidentally, the parking brake monitoring unit 4 immediately outputs an electrical signal to disconnect the parking brake monitoring loop 9, further disconnect the emergency brake safety loop 10 and trigger the emergency brake to stop; meanwhile, fault diagnosis information of accidental application of parking brake is sent to the train network control system 11 and reported on the display screen 12.

(1) The running speed of the train is more than or equal to 5 km/h;

(2) the parking brake detection device 5 detects that the parking brake pressure is less than 480 kPa;

under the fault working condition, the parking brake redundant monitoring of the vehicle is carried out, and when the pressure electric signal output by the No. 1 parking brake detection device 5 is invalid, the parking brake monitoring unit 4 diagnoses the parking brake state of the vehicle by adopting the parking brake pressure electric signal and the train speed signal detected by the redundant parking brake detection device 6; when the following conditions are met, the parking brake is diagnosed to be applied accidentally, the parking brake monitoring unit 4 immediately outputs an electrical signal to disconnect the parking brake monitoring loop 9, further disconnect the emergency brake safety loop 10 and trigger the emergency brake to stop; meanwhile, fault diagnosis information of accidental application of parking brake is sent to the train network control system 11 and reported on the display screen 12.

(1) The running speed of the train is more than or equal to 5 km/h;

(2) the pressure electric signal output by the parking brake detection device 5 is invalid;

(3) the redundant parking brake detection device 6 detects that the parking brake pressure is less than 480 kPa;

under the fault condition, redundant monitoring of partner vehicle parking brake is carried out, as exemplified by the vehicle No. 1 and the vehicle No. 2 in the train shown in FIG. 1, the vehicle No. 1 and the vehicle No. 2 in the train are defined as a pair of fixed partner vehicles, and the vehicle No. 1 and the vehicle No. 2 respectively obtain a parking brake pressure network signal and a train speed signal detected by the redundant parking brake detection device 6 of the opposite side through the train network control system 11 for diagnosis. When the train network control system 11 diagnoses that the No. 1 vehicle parking brake monitoring unit 4 has a fault or the No. 1 vehicle parking brake monitoring unit 4 has a communication fault with the train network control system 11, the No. 1 vehicle partner vehicle No. 2 vehicle takes over to monitor the No. 1 vehicle parking brake state, when the following conditions are met, the No. 2 vehicle parking brake monitoring unit diagnoses that the No. 1 vehicle parking brake is applied accidentally, the No. 2 vehicle parking brake monitoring unit immediately outputs an electrical signal to disconnect the parking brake monitoring loop 9, further disconnect the emergency brake safety loop 10, and trigger emergency brake parking; meanwhile, fault diagnosis information of accidental application of parking brake is sent to the train network control system 11 and reported on the display screen 12.

(1) The running speed of the train is more than or equal to 5 km/h;

(2) the train network control system 11 diagnoses the fault of the No. 1 parking brake monitoring unit 4 or the communication fault of the No. 1 parking brake monitoring unit 4 and the train network control system 11;

(3) the redundant parking brake detection device 6 of the No. 1 vehicle detects that the parking brake pressure is less than 480 kPa;

the train network control system 11 receives the fault diagnosis information of the accidental application of the parking brake of the No. 1 vehicle reported by the No. 2 vehicle, and displays the fault information of the accidental application of the parking brake of the No. 1 vehicle on the display screen 12 according to the defined fellow vehicle.

The embodiment ensures that the monitoring function of the parking brake of the motor train unit can be still realized when the parking brake monitoring unit of the motor train unit vehicle has a fault or has a communication fault with the train network control system, and the safety performance of the train is improved.

It should be understood that the above embodiments are only examples for clearly illustrating the present invention, and are not intended to limit the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.