Secure computer platform used for rail transit

Abstract

The invention provides a secure computer platform used for a rail transit. The secure computer platform used for the rail transit comprises a first host device, at least one second host device, a first communication transfer device, at least one second communication transfer device, a first input / output device, at least one second input / output device, an Ethernet and a FlexRay bus, wherein the first input / output device, the second input / output device, the first network connection end of the first communication transfer device and the third network connection end of the second communication transfer device are connected with the FlexRay bus, the second network connection end of the first communication transfer device and the fourth network connection end of the second communication transfer device are connected with the Ethernet, the first host device and the first input / output device are communicated through the Ethernet, and the second host device and the second input / output device are communicated through the Ethernet.

Description

technical field [0001] The invention relates to the field of rail traffic signals, in particular to a safety computer platform based on Ethernet and FlexRay bus. Background technique [0002] With the popularization and deepening of computer and network technology, safety computers are widely used in safety-critical fields such as aerospace, military and military industry, chemical energy, rail transportation, etc., especially in the field of rail transportation signals. Safety computers play a vital role in the protection of rail signals important role. [0003] In the field of rail transit signals, traditional safety computers usually use the CAN bus of the controller area network, but when expanding digital input and output, the bandwidth of the CAN bus is small, resulting in a low transmission rate. Moreover, the CAN bus is based on event-triggered communication. When several messages are sent at the same time, network congestion will occur, which will affect the work e...

AI Technical Summary

Problems solved by technology

[0003] In the field of rail transit signals, traditional safety computers usually use the CAN bus of the controller area network, but when expanding digital input and output, the bandwidth of the CAN bus is small, resulting in a low transmission rate

Moreover, the CAN bus is based on event-triggered communication. When several messages are sent at the same time, network congestion will occur, which will affect the work efficiency of the security computer. Its arbitration mechanism based on bit competition ensures that messages are sent in order of priority. However, there will be a large delay in the transmission of some information, and it is difficult to estimate its delay characteristics. In order to improve the reliability of communication, it is often necessary to increase the redundant bus, resulting in a complex structure of the safety computer bus, which increases development and maintenance costs.

In addition, traditional safety computers have limited expansion functions, and it is difficult to expand functions and equipment according to the applied system. They are often only applicable to a single system, and their versatility is weak. The fixed component settings also make traditional safety computers It cannot be expanded flexibly, and it also limits the scope of application of the security computer

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