Platform door control device and system based on security computer

Abstract

The invention provides a platform door control device and system based on a safety computer, the platform door control device comprises the safety computer and an external interface module, the safety computer comprises a communication layer, a main control layer and an execution layer; the communication layer performs data interaction with the main control layer through an internal redundant Ethernet; and the main control layer and the execution layer are communicated through a redundant CAN bus. The platform door controller based on the double two-out-of-two safety computer is adopted, the redundant safety IO technology is adopted for collecting input signals and transmitting output signals, when any channel is abnormal, platform door control is conducted according to the preset fault guiding safety logic, and in addition, the fault guiding safety logic is controlled according to the fault guiding safety logic. A communication recording board of the safety computer and the platform door control DCU device form a redundant double-channel communication relation through an external interface module, and therefore safety, reliability and usability of the platform door control system are effectively improved.

Description

technical field [0001] The invention relates to the technical field of rail traffic control, in particular to a platform door control device and system based on a safety computer. Background technique [0002] With the development of urban rail transit industry, there are more and more operating lines and more and more passenger flow. In order to protect the safety of passengers' lives and property, more than 90% of rail transit platforms have installed platform door control systems, which is of great importance The platform door control system puts forward higher security requirements. At present, the platform door control systems of subway lines in operation at home and abroad have not been included as public safety equipment, nor have strict and standardized safety certification for the system, nor have they defined the safety integrity level of the system. The understanding and emphasis on equipment has continuously improved the requirements for the platform door contro...

AI Technical Summary

Problems solved by technology

However, because the design scheme of its application does not adopt the architecture of a safe computer, the operation logic of its controller lacks safety measures for the processing of the acquisition signal and the control of the driving signal

[0004] The input channel of the platform door controller does not adopt a safety redundancy design scheme. When the information of the acquisition channel is wrong due to external factors, the system is not easy to diagnose and cannot distinguish whether the received information is correct, which may cause the system to make wrong judgments , the subsequent logical operation and control signal will also be wrong, which will affect the correctness of the control of the door control unit, and cause the platform door controller system to fail to correctly realize the functions of linkage with the car door or opening and closing the platform door.

In addition, since there is no voting mechanism for safety output in the platform door controller system, when the processor outputs data faulty, it will directly cause the system to output error information, which will also affect the correctness of the control of the door control unit.

[0005] To sum up, the existing platform door controller does not adopt the technology of safety architecture design. When the logic operation, acquisition and drive of the system fail, the safety, availability and reliability of the whole system will be affected.

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