Working method of secure computer specially used for railways

Abstract

The invention discloses a working method of a secure computer specially used for railways. The computer comprises two secure computers which are respectively used as a principal machine and a standby machine; each secure computer comprises a CPU (Central Processing Unit) board and a plurality of communication boards, wherein data transmission and synchronization between a first CPU module and a second CPU module of the CPU board are completed through a double-port RAM (Random Access Memory) and interrupt operation; the data exchange between the CPU board and the communication board positioned in a same system is completed through the double-port RAM and the interrupt operation; the first CPU module and the second CPU module output control signals used for driving a general control relay during the operation of the system, and the normally open contact of the general control relay is used for controlling onboard secure relays and active power supplies of all the communication boards. The working method disclosed by the invention can realize the functional security of a square two-out-of-two architecture platform through the secure computer specially used for the railways, realize the synchronization of the short-period task levels of the system and double systems and achieve seamless switching under the condition of a fault.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a working method of a special safety computer for railways. Background technique [0002] In recent years, with the increasingly fierce competition in the transportation market, railways in various countries have actively adopted new technologies in order to achieve speed-up, high-speed and heavy-duty transportation, which has greatly improved the modernization level of communication and signal equipment, and new technologies continue to emerge. Based on software cycle synchronization or hardware clock synchronization, safety computers with "two out of three" or "two out of two" redundant structure have been widely used in the field of railway signal control due to their high security and high reliability. application. figure 1 It is a classic architecture of railway signal control system. The safety computer works at the interlocking operation layer and is the core comput...

AI Technical Summary

Problems solved by technology

Although my country's railways have made great progress, they are facing the dilemma of lacking core technologies, especially core technologies for safety platforms.

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