Networked safety interlock circuit for rail transit door system, and implementation method therefor

Abstract

A networked safety interlock circuit for a rail transit door system, and an implementation method therefor. The networked safety interlock circuit comprises several individual door safety circuits, and each switch in the individual door safety circuits has two pairs of contacts; one pair of contacts of each switch are both connected to a local DCU, and after safety input processing is completed within the local DCU, a signal is uploaded to a domain control unit by means of safety communication; the other pair of contacts of each switch are divided into two circuits for connection; one end of each of the two circuits is connected to a power source of an adjacent door, and the other end is connected to an input port of an adjacent DCU; and after safety input processing is performed by the adjacent DCU, a signal is uploaded to the domain control unit by means of safety communication. In the networked safety interlock circuit for a rail transit door system, hard wires connecting all doors in series are eliminated, and the function of the safety circuit reaches an SIL4 level; moreover, by means of adjacent-door mutual collection design, the reliability of the safety circuit is improved, and the situation where a domain control unit cannot determine the status of the safety circuit due to a power failure of a single DCU is avoided.

Description

Rail transit door system network security interlocking loop and implementation method thereof TECHNICAL FIELD

[0001] The present application relates to a safety interlocking loop, in particular to a rail transit door system network security interlocking loop and implementation method thereof. BACKGROUND

[0002] The current rail transit door system sets a safety interlocking loop signal for safety consideration, which is used to ensure that only when all rail door systems are in the lock-to-position state, the safety signal of the traction train can be ensured. As shown in FIG. 1, the existing rail transit door system safety interlocking loop is formed by a single door safety loop connected in series through a hard wire, and the single door safety loop has a lock-to-position switch 1 and a lock-to-position switch 2, each switch has two pairs of contacts, and the specific connection is as follows: one pair of contacts of the lock-to-position switch 1 and one pair of contacts of the lock-to-position switch 2 are connected in series; the other pair of contacts of the lock-to-position switch 1 and the lock-to-position switch 2 are connected to the door controller (DCU). When all switches are in the lock-to-position state, the safety interlocking loop is closed. However, the existing safety interlocking loop scheme needs to connect all door hard wires in series; and one hard wire signal cannot reach the SIL4 safety level. SUMMARY

[0003] The present application aims to provide a rail transit door system network safety interlocking loop and implementation method thereof which cancels the hard wire connection and can reach the SIL4 level.

[0004] Technical scheme: The rail transit door system network safety interlocking loop provided by the present application comprises a plurality of single door safety loops, each switch in the single door safety loop has two pairs of contacts; wherein one pair of contacts of each switch is connected to the DCU of the door, and after safety input processing in the DCU of the door, it is uploaded to the domain controller through safety communication; the other pair of contacts of each switch is connected to two loops, one end of the two loops is respectively connected to the power supply of the adjacent door, and the other end is respectively connected to the input port of the DCU of the adjacent door, and after safety input processing by the DCU of the adjacent door, it is uploaded to the domain controller through safety communication.

[0005] Preferably, the switch of the single door safety loop comprises a lock-to-position switch 1 and a lock-to-position switch 2, one end of the contact of the lock-to-position switch 1 is connected to the positive electrode of the power supply of the adjacent door, and the other end is connected to the input port of the DCU of the adjacent door to form a loop; one end of the contact of the lock-to-position switch 2 is connected to the input port of the DCU of the adjacent door, and the other end is connected to the negative electrode of the power supply of the adjacent door to form another loop.

[0006] Preferably, the single door safety loop is effective when the loop formed by the lock-to-position switch 1 and the loop formed by the lock-to-position switch 2 are all effective.

[0007] Preferably, the secure communication is performed through TSN.

[0008] The method for implementing the network security interlocking loop of the rail transit door system comprises the following steps: connecting one pair of contacts of a switch in a single-door safety loop to a door DCU; after completing safety input processing in the door DCU, uploading to a domain controller through secure communication; performing safety calculation on the switch signals of all single-door safety loops by the domain controller to determine whether the network security interlocking loop of the door system is closed; connecting the other pair of contacts of the switch to two loops, one end of the two loops being connected to a power supply of a neighboring door, and the other end being connected to an input port of a DCU of the neighboring door; after completing safety input processing by the DCU of the neighboring door, uploading to the domain controller through secure communication; under normal circumstances, performing safety calculation on the switch signals of all single-door safety loops by the domain controller to determine whether the safety loop is closed; and under abnormal circumstances, i.e. when a single DCU is powered off, using the safety loop state uploaded by the DCU of the neighboring door to replace the switch signal of the DCU to perform safety calculation.

[0009] Preferably, the switch in the single-door safety loop comprises a lock-to-position switch 1 and a lock-to-position switch 2, one end of the contacts of the lock-to-position switch 1 being connected to a positive electrode of a power supply of a neighboring door, and the other end being connected to an input port of a DCU of the neighboring door to form a loop; one end of the contacts of the lock-to-position switch 2 being connected to the input port of the DCU of the neighboring door, and the other end being connected to a negative electrode of the power supply of the neighboring door to form another loop.

[0010] Preferably, the single-door safety loop is valid when the loop formed by the lock-to-position switch 1 and the loop formed by the lock-to-position switch 2 are both valid.

[0011] Preferably, the secure communication is performed through TSN.

[0012] The electronic device comprises a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and the computer program implements the method for implementing the network security interlocking loop of the rail transit door system when loaded to the processor.

[0013] The computer readable storage medium stores a computer program, and the computer program implements the method for implementing the network security interlocking loop of the rail transit door system when executed by a processor.

[0014] Compared with the prior art, the present application has the following advantages: the present application eliminates the hard wire connected in series to all doors, and the safety loop function reaches the SIL4 level; the safety loop reliability is improved through the design of mutual acquisition of neighboring doors, and the domain controller can determine the safety loop state even when a single DCU is powered off. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a schematic diagram of a prior art safety circuit structure;

[0016] Fig. 2 is a schematic diagram of a network safety interlocking circuit structure according to an embodiment of the present application;

[0017] Fig. 3 is a schematic diagram of a network safety interlocking circuit structure according to another embodiment of the present application. DETAILED DESCRIPTION

[0018] The technical solutions of the present application will be further described below with reference to the accompanying drawings.

[0019] As shown in Fig. 2, the network safety interlocking circuit of the rail transit door system according to the present application, in this embodiment, the rail transit door system is a platform door, which comprises a plurality of single-door internal safety circuits, each single-door internal safety circuit comprising a lock-to-position switch 1 and a lock-to-position switch 2. Each switch has two pairs of contacts. One pair of contacts of the lock-to-position switch 1 and one pair of contacts of the lock-to-position switch 2 are connected to the door controller DCU of the door, and after the safety input processing in the DCU, the safety communication is uploaded to the domain controller. The other pair of contacts of the lock-to-position switch 1 are connected to the positive electrode of the adjacent door power supply and the input port of the adjacent door DCU, respectively; the other pair of contacts of the lock-to-position switch 2 are connected to the input port of the adjacent door DCU and the negative electrode of the adjacent door power supply, respectively, and after the safety input processing by the adjacent door DCU, the safety communication is uploaded to the domain controller. In Fig. 2, input+ and input- are the same input port. The circuit formed by the lock-to-position switch 1 and the circuit formed by the lock-to-position switch 2 achieve the effect of double cutting, i.e. the single-door internal safety circuit is valid only when both circuits are valid. In this embodiment, TSN network is used for safety communication. The domain controller refers to the platform door integrated control integrated platform described in the invention patent with application number 2024111129838. The platform door integrated control integrated platform comprises a control integration module and a network integration module, the network integration module provides a network basis for the control integration module, the control integration module integrates the general control functions of the discrete devices of each subsystem of the platform door by using the FDF software middleware layer to realize control integration; the network integration module integrates the discrete devices of each subsystem of the platform door into a network communication by using time-sensitive network in the underlying communication layer. The integrated control integrated platform is used to integrate the control function logic of the discrete devices of each subsystem of the platform door into a unified domain controller through the control integration module and the network integration module, the discrete devices are execution units, and all DCU subsystems in the platform door system and the domain controller form a ring network topology through the TSN network.

[0020] Based on the same inventive concept, the application also provides an electronic device, which comprises a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and the computer program realizes the implementation method of the rail transit door system network safety interlocking loop when loaded into the processor.

[0021] Based on the same inventive concept, the application also provides an electronic device, which comprises a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and the computer program realizes the implementation method of the rail transit door system network safety interlocking loop when loaded into the processor.

[0022] Based on the same inventive concept, the application also provides an electronic device, which comprises a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and the computer program realizes the implementation method of the rail transit door system network safety interlocking loop when loaded into the processor.

[0023] As shown in FIG. 3, the network security interlocking loop of the rail transit door system according to the present application is used for the vehicle door system, wherein two adjacent doors on each side of the vehicle form a group, the network security interlocking loop of each group is consistent with the platform door, all the doors in each vehicle form a ring network through the network and are connected to the vehicle switch, the switches of each vehicle are connected, a domain controller is arranged at the head of the vehicle and at the position of the vehicle, and the domain controllers are connected to the vehicle switch. Specifically, the network security interlocking loop of the vehicle door system comprises a plurality of single-door internal security loops, each single-door internal security loop comprises a lock-in-place switch 1 and a lock-in-place switch 2. Each switch has two pairs of contacts. One pair of contacts of the lock-in-place switch 1 and one pair of contacts of the lock-in-place switch 2 are connected to the door controller DCU of the door, and after the safety input is processed in the DCU, the safety communication is uploaded to the domain controller. The other pair of contacts of the lock-in-place switch 1 are connected to the positive electrode of the adjacent door power supply and the input port of the adjacent door DCU; the other pair of contacts of the lock-in-place switch 2 are connected to the input port of the adjacent door DCU and the negative electrode of the adjacent door power supply, and after the safety input is processed by the adjacent door DCU, the safety communication is uploaded to the domain controller. In FIG. 3, input+ and input- are the same input port. The loop formed by the lock-in-place switch 1 and the loop formed by the lock-in-place switch 2 achieve the effect of double cutting, that is, when both the loops are effective, the single-door internal security loop is effective. In this embodiment, the TSN network is used for safety communication. The domain controller refers to the door control integrated platform described in the application No. 2024105097030.

[0024] Based on the same inventive concept, the implementation method of the vehicle door network security interlocking loop disclosed in the application connects both pairs of contacts of the switch in the single-door safety loop into the door DCU, and after the safety input is processed in the door DCU, the safety communication is uploaded to the domain controller, the domain controller performs safety calculation on the switch signals of all single-door safety loops, and judges whether the door system network security interlocking loop is closed; the other pair of contacts of the switch is connected into two loops, one end of the two loops is connected into the power supply of the adjacent door respectively, and the other end is connected into the input port of the adjacent door DCU, and after the safety input is processed by the adjacent door DCU, the safety communication is uploaded to the domain controller. The loop formed by the lock-to-position switch 1 and the loop formed by the lock-to-position switch 2 achieve the effect of double cutting, that is, when both loops are effective, the single-door safety loop is effective. Under normal circumstances, the domain controller performs safety calculation on the switch signals of all single-door safety loops to judge whether the safety loop is closed; under abnormal circumstances, that is, when a single DCU is powered off, the domain controller uses the safety loop state uploaded by the adjacent door DCU to replace the switch signal of the DCU for safety calculation. While achieving SIL4, the reliability of the entire safety interlocking loop is improved. The domain controller refers to the door control integrated platform disclosed in the application number 2024105097030. In order to prevent a single DCU from being powered off to cause the domain controller to be unable to judge the state of the door system network security interlocking loop, the application adopts the design of adjacent door mutual collection, that is, two adjacent doors are cross-collected, and one DCU has a circuit for collecting the states of two doors.

[0025] Based on the same inventive concept, the application further provides an electronic device, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, and the computer program implements the implementation method of the vehicle door network security interlocking loop when loaded into the processor.

[0026] Based on the same inventive concept, the application further provides a computer readable storage medium, which stores a computer program, and the computer program implements the implementation method of the vehicle door network security interlocking loop when executed by a processor.

Claims

1. A rail transit door system network security interlock loop, characterized in that, The single-door internal safety circuit includes several single-door internal safety circuits, each switch in the single-door internal safety circuit has two pairs of contacts; one pair of contacts of each switch is connected to the door DCU, after safety input processing in the door DCU, the safety communication is uploaded to the domain controller; the other pair of contacts of the switch is connected to two circuits, one end of each circuit is connected to the power supply of the adjacent door and the input port of the adjacent door DCU, and after safety input processing by the adjacent door DCU, the safety communication is uploaded to the domain controller.

2. The rail transit door system network security interlock loop of claim 1, wherein, The switch of the single-door internal safety circuit includes a lock-to-position switch 1 and a lock-to-position switch 2, one end of the contact of the lock-to-position switch 1 is connected to the positive electrode of the power supply of the adjacent door, and the other end is connected to the input port of the adjacent door DCU to form a circuit; one end of the contact of the lock-to-position switch 2 is connected to the input port of the adjacent door DCU, and the other end is connected to the negative electrode of the power supply of the adjacent door to form another circuit.

3. The rail transit door system cyber-security interlock loop of claim 2, wherein, When the circuits formed by the lock-to-position switch 1 and the lock-to-position switch 2 are all effective, the single-door internal safety circuit is effective.

4. The rail transit door system cyber-security interlock loop of claim 1, wherein, The safety communication is performed through TSN.

5. A method for implementing a network security interlock loop for a rail transit door system, characterized in that, One pair of contacts of the switch of the single-door internal safety circuit is connected to the door DCU, after safety input processing in the door DCU, the safety communication is uploaded to the domain controller, the domain controller performs safety calculation on the switch signals of all single-door internal safety circuits to determine whether the door system network safety interlocking circuit is closed; the other pair of contacts of the switch is connected to two circuits, one end of each circuit is connected to the power supply of the adjacent door, and the other end is connected to the input port of the adjacent door DCU, after safety input processing by the adjacent door DCU, the safety communication is uploaded to the domain controller; under normal circumstances, the domain controller performs safety calculation on the switch signals of all single-door internal safety circuits to determine whether the safety circuit is closed; under abnormal circumstances, i.e. when a single DCU is powered off, the domain controller uses the safety circuit state uploaded by the adjacent door DCU to replace the switch signal of the DCU for safety calculation.

6. The method for implementing a rail transit door system network security interlocking loop according to claim 5, characterized in that, The switch of the single-door internal safety circuit includes a lock-to-position switch 1 and a lock-to-position switch 2, one end of the contact of the lock-to-position switch 1 is connected to the positive electrode of the power supply of the adjacent door, and the other end is connected to the input port of the adjacent door DCU to form a circuit; one end of the contact of the lock-to-position switch 2 is connected to the input port of the adjacent door DCU, and the other end is connected to the negative electrode of the power supply of the adjacent door to form another circuit.

7. The implementation of the rail transit door system network security interlock loop according to claim 6, characterized in that, When the circuits formed by the lock-to-position switch 1 and the lock-to-position switch 2 are all effective, the single-door internal safety circuit is effective.

8. The method for implementing a rail transit door system network security interlocking loop according to claim 5, characterized in that, The safety communication is performed through TSN.

9. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The computer program is loaded into the processor to realize the implementation method of the rail transit door system network safety interlocking circuit according to any one of claims 5-8.

10. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 9. The computer program is executed by the processor to realize the implementation method of the rail transit door system network safety interlocking circuit according to any one of claims 5-8.

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