A network security interlocking loop for rail transit door system and its implementation method

Abstract

The present invention discloses a network security interlocking circuit for a rail transit door system and an implementation method thereof, wherein the network security interlocking circuit comprises several single-door internal safety circuits, wherein each switch in the single-door internal safety circuit has two pairs of contacts; wherein a pair of contacts of each switch is connected to the DCU of the door, and after completing the safety input processing in the DCU of the door, the contacts are uploaded to the domain controller through safety communication; the other pair of contacts of each switch is divided into two circuit connections, wherein one end of the two circuits 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 the safety input processing is performed by the DCU of the adjacent door, the contacts are uploaded to the domain controller through safety communication. The present invention eliminates the hard wires connecting all doors in series, and the safety circuit function reaches the SIL4 level; and through the design of mutual acquisition of adjacent doors, the reliability of the safety circuit is improved, and it is avoided that the domain controller cannot judge the state of the safety circuit due to the power failure of a single DCU.

Description

Technical Field

[0001] The invention relates to a safety interlocking circuit, in particular to a network safety interlocking circuit of a rail transit door system and a realization method thereof. Background Art

[0002] For safety reasons, the current rail transit door system is equipped with a safety interlock circuit signal to ensure that the train can be driven only when all the rail door systems are locked in place. Figure 1 As shown in the figure, the existing rail transit door system safety interlock circuit is composed of a single door internal safety circuit connected in series through hard wires. The single door internal safety circuit has a lock-in position switch 1 and a lock-in position switch 2. Each switch has two pairs of contacts, which are specifically connected as follows: a pair of contacts of the lock-in position switch 1 and a pair of contacts of the lock-in position switch 2 are connected in series; the other pair of contacts of the lock-in position switch 1 and the lock-in position switch 2 are both connected to the door controller (DCU). When all switches are fully locked, the safety interlock circuit is closed. However, the existing safety interlock full circuit solution requires hard wires to connect all doors in series; and a hard wire signal cannot reach the SIL4 safety level. Summary of the invention

[0003] Purpose of the invention: The present invention aims to provide a network security interlocking circuit for a rail transit door system that eliminates hard-wire connections and can reach SIL4 level, and a method for implementing the same.

[0004] Technical solution: A network security interlocking circuit for a rail transit door system described in the present invention comprises several single-door internal safety circuits, and each switch in the single-door internal safety circuit has two pairs of contacts; wherein a pair of contacts of each switch is connected to the DCU of the door, and after completing the security input processing in the DCU of the door, the contacts are uploaded to the domain controller through security communication; the other pair of contacts of each switch is divided into two circuit connections, and one end of the two circuits are respectively connected to the power supply of the adjacent door, and the other end are respectively connected to the input port of the DCU of the adjacent door, and after the security input processing is performed by the DCU of the adjacent door, the contacts are uploaded to the domain controller through security communication.

[0005] Preferably, the switches of the safety circuit in the single door include a locked-in-place switch 1 and a locked-in-place switch 2, one end of the contact of the locked-in-place switch 1 is connected to the positive pole of the adjacent door power supply, 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 locked-in-place switch 2 is connected to the input port of the adjacent door DCU, and the other end is connected to the negative pole of the adjacent door power supply to form another circuit.

[0006] Preferably, when the circuit formed by the locked-in-place switch 1 and the circuit formed by the locked-in-place switch 2 are both effective, the safety circuit within the single door is effective.

[0007] Preferably, secure communication takes place via TSN.

[0008] A method for realizing a network security interlocking loop of a rail transit door system described in the present invention comprises the following steps: connecting a pair of contacts of a switch of a safety loop in a single door to the DCU of the door, completing safety input processing in the DCU of the door, uploading the signals to a domain controller through safety communication, and performing safety calculation on switch signals of all safety loops in the single door to determine whether the network security interlocking loop of the door system is closed; the other pair of contacts of the switch is divided into two loop connections, 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 the signals are uploaded to the domain controller through safety communication after safety input processing by the DCU of the adjacent door; under normal circumstances, the domain controller performs safety calculation on switch signals of all safety loops in the single door to determine 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 status uploaded by the DCU of the adjacent door to replace the switch signal of the DCU for safety calculation.

[0009] Preferably, the switches of the safety circuit in the single door include a locked-in-place switch 1 and a locked-in-place switch 2, one end of the contact of the locked-in-place switch 1 is connected to the positive pole of the adjacent door power supply, 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 locked-in-place switch 2 is connected to the input port of the adjacent door DCU, and the other end is connected to the negative pole of the adjacent door power supply to form another circuit.

[0010] Preferably, when the circuit formed by the locked-in-place switch 1 and the circuit formed by the locked-in-place switch 2 are both effective, the safety circuit within the single door is effective.

[0011] Preferably, secure communication takes place via TSN.

[0012] An electronic device described in the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is loaded into the processor, the method for realizing the network security interlocking loop of the rail transit door system is implemented.

[0013] The present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for realizing the network security interlocking loop of the rail transit door system is implemented.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: the present invention eliminates the hard wires connecting all doors in series, and the safety circuit function reaches SIL4 level; through the design of adjacent door mutual acquisition, the reliability of the safety circuit is improved, and the power failure of a single DCU causing the domain controller to be unable to determine the status of the safety circuit is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the safety circuit structure of the prior art;

[0016] Figure 2 It is a schematic diagram of the network security interlocking loop structure of the present invention. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0018] like Figure 2 As shown, a network security interlocking circuit of a rail transit door system described in the present invention includes several single-door internal safety circuits, and the single-door internal safety circuits include a lock-in-place switch 1 and a lock-in-place switch 2. Each switch has two pairs of contacts. Among them, a pair of contacts of the lock-in-place switch 1 and a pair of contacts of the lock-in-place switch 2 are both connected to the door controller DCU of the door, and after completing the security input processing in the DCU, they are uploaded to the domain controller through security communication. The other pair of contacts of the lock-in-place switch 1 are respectively connected to the positive pole 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 respectively connected to the input port of the adjacent door DCU and the negative pole of the adjacent door power supply, and after the adjacent door DCU performs security input processing, it is uploaded to the domain controller through security communication. Figure 2 In the figure, 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 loops are valid, the safety loop in the single door is valid. This embodiment uses the TSN network for security communication. The domain controller refers to the platform door fusion control integration platform described in the invention patent with application number 2024111129838. The platform door fusion control integration platform includes a control fusion module and a network fusion module. The network fusion module provides a network foundation for the control fusion module. The control fusion module uses the FDF software middleware layer to integrate the common control functions of the discrete devices of each subsystem of the platform door to achieve control fusion; the network fusion module uses a time-sensitive network in the underlying communication layer to enable the subsystems of the platform door to communicate in a fusion network. The fusion control integration 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 fusion module and the network fusion module. The discrete devices are all execution units. All DCU subsystems and domain controllers in the platform door system form a ring network topology through the TSN network.

[0019] Based on the same inventive concept, the present invention discloses a method for realizing a network security interlocking loop of a rail transit door system, wherein a pair of contacts of the switch of the safety loop in a single door are connected to the DCU of the door, and after completing the safety input processing in the DCU of the door, the pair of contacts are uploaded to the domain controller through safety communication, and the domain controller performs safety calculation on the switch signals of the safety loop in all single doors to determine whether the network security interlocking loop of the door system is closed; the other pair of contacts of the switch are connected in two loops, and one end of the two loops are respectively connected to the power supply of the adjacent door, and the other end are respectively connected to the input port of the DCU of the adjacent door, and after the DCU of the adjacent door performs safety input processing, the pair of contacts are uploaded to the domain controller through safety communication. 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 loops are valid, the safety loop in the single door is valid. Under normal circumstances, the domain controller performs safety calculation on the switch signals of the safety loops in all single doors to determine 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 status uploaded by the DCU of the adjacent door 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 platform door fusion control integrated platform described in Application No. 2024111129838. In order to prevent the domain controller from being unable to determine the state of the door system network security interlocking loop due to power failure of a single DCU, the present invention adopts a neighboring door mutual acquisition design, that is, two adjacent doors cross-acquire each other, and one DCU has a circuit for acquiring the states of the two doors.

[0020] Based on the same inventive concept, the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the computer program is loaded into the processor, the method for realizing the network security interlocking loop of the rail transit door system is implemented.

[0021] Based on the same inventive concept, the present invention also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the method for implementing the network security interlocking loop of the rail transit door system is implemented.

Claims

1. A network security interlocking circuit for a rail transit door system, characterized in that: It comprises a plurality of single-door internal safety circuits, each switch in the single-door internal safety circuit has two pairs of contacts; wherein a pair of contacts of each switch is connected to the door DCU, and after completing the safety input processing in the door DCU, is uploaded to the domain controller through safety communication; the other pair of contacts of the switch is divided into two circuit connections, and the two circuits are respectively connected to the adjacent door power supply and the adjacent door DCU input port, and after the adjacent door DCU performs safety input processing, is uploaded to the domain controller through safety communication; the switches of the single-door internal safety circuit comprise a lock-in-place switch 1 and a lock-in-place switch 2, one end of the contact of the lock-in-place switch 1 is connected to the positive electrode of the adjacent door power supply, 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-in-place 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 adjacent door power supply to form another circuit.

2. The rail transit door system network security interlocking circuit according to claim 1 is characterized in that: When the circuit formed by the locked position switch 1 and the circuit formed by the locked position switch 2 are both valid, the safety circuit in the single door is valid.

3. The rail transit door system network security interlocking circuit according to claim 1 is characterized in that: Secure communication via TSN.

4. A method for implementing a network security interlocking loop of a rail transit door system, characterized in that: A pair of contacts of the switch of the safety circuit in a single door are connected to the DCU of the door. After the safety input processing is completed in the DCU of the door, it is uploaded to the domain controller through safety communication. The domain controller performs safety calculations on the switch signals of all safety circuits in the single door to determine whether the door system network safety interlock circuit is closed; the other pair of contacts of the switch are divided into two circuits, one end of the two circuits are respectively connected to the power supply of the adjacent door, and the other end are respectively connected to the input port of the DCU of the adjacent door. After the safety input processing is performed by the DCU of the adjacent door, it is uploaded to the domain controller through safety communication; under normal circumstances, the domain controller performs safety calculations on the switch signals of all safety circuits in the single door to determine whether the safety circuit is closed; under abnormal circumstances, that is, when a single DCU is powered off, the domain controller uses the safety circuit status uploaded by the DCU of the adjacent door to replace the switch signal of the DCU for safety calculation.

5. The method for implementing a network security interlocking loop of a rail transit door system according to claim 4, characterized in that: The switches of the safety circuit in the single door include a locked position switch 1 and a locked position switch 2. One end of the contact of the locked position switch 1 is connected to the positive pole of the adjacent door power supply, 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 locked position switch 2 is connected to the input port of the adjacent door DCU, and the other end is connected to the negative pole of the adjacent door power supply to form another circuit.

6. The method for implementing a network security interlocking loop of a rail transit door system according to claim 5, characterized in that: When the circuit formed by the locked position switch 1 and the circuit formed by the locked position switch 2 are both valid, the safety circuit in the single door is valid.

7. The method for implementing a network security interlocking loop of a rail transit door system according to claim 4, characterized in that: Secure communication via TSN.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the computer program is loaded into the processor, the method for realizing the network security interlocking loop of the rail transit door system according to any one of claims 4 to 7 is implemented.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, a method for realizing a network security interlocking loop of a rail transit door system according to any one of claims 4 to 7 is implemented.

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