Double 2-vote-2 system and safety diagnosis method thereof

Abstract

The embodiment of the invention discloses a double 2-vote-2 system and a safety diagnosis method thereof and relates to the computer system safety processing technology field. The system comprises a main system unit, a standby system unit and a switching unit. The safety diagnosis method comprises the following steps of carrying out power on; carrying out power on self-checking; carrying out dataoutput; carrying out data input; operating; self-checking; and then successively carrying out a cycle period of data output, data input, operation and self-checking. In the cycle period of data output, data input, operation and self-checking, a first CPU of a main system and a second CPU of the main system are synchronized, mutually inspected and compared, and the first CPU of a standby system andthe second CPU of the standby system are synchronized, mutually inspected and compared. In the prior art, the double 2-vote-2 system lacks diagnosis of intermediate process data, a detection coverageis not high, the system is difficult to reach a safety requirement, and the system lacks diagnosis of a state of the system itself. In the invention, the above diagnosis problems can be solved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of computer system security processing, and in particular to a 2 by 2 system and a security diagnosis method thereof. Background technique [0002] According to the actual situation of my country's railways, the most prominent advantage of the two-by-two system structure is that it can make one system run normally and be debugged on the other system, which can well adapt to the technical upgrade of high-density traffic trunk lines, because excellent Its performance has gradually become the mainstream trend of domestic computer interlocking systems, and most of the new projects and the transformation of existing line systems adopt this structure. The two-by-two computer interlocking system is composed of four computing modules, two comparators and a switcher. An arithmetic module and a comparator for the fault detection function. When the operation module detects that it has failed, it ...

AI Technical Summary

Problems solved by technology

[0004] Therefore, the embodiment of the present invention provides a 2 by 2 system and its safety diagnosis method to solve the lack of diagnosis of intermediate process data in the 2 by 2 system in the prior art, the detection coverage rate is not high, and the Difficult to meet security requirements, and also lacks diagnostics of its own state

Images