A safety platform input consistency comparison method based on a 2*2-out-of-two architecture

A secure platform and consistent technology, applied in the architecture with a single central processing unit, multi-programming devices, inter-program communication, etc., can solve the problems of increasing the processing burden of upper-layer applications, limiting the number of messages, and existing security risks. Prevent mis-throwing, improve efficiency, and improve continuous effect

CN109739804AActive Publication Date: 2019-05-10CASCO SIGNAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-05-10

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Abstract

The invention relates to a safety platform input consistency comparison method based on a 2 * 2-out-of-two architecture. According to the method, comparison of actual input messages is converted intocomparison of message index serial numbers, comparison of the message index serial numbers is further converted into comparison of only the message start-stop index serial numbers, and finally messages needing to be sent to an upper-layer application are obtained by combining a recorded lost message sequence. Compared with the prior art, the method has the advantages of simplifying logic, improving efficiency and the like.
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Description

technical field

[0001] The invention relates to a wayside safety platform, in particular to a safety platform input consistency comparison method based on a 2 by 2 out of 2 architecture. Background technique

[0002] The trackside safety platform is a general-purpose SIL4-level safety computer system, which can be used as trackside safety equipment for subways and railways in conjunction with upper-layer applications, such as area controllers, interlocks, train control, trams, etc. The trackside safety platform involved in the present invention adopts a 2 by 2 security architecture, a main machine (main system) and a backup machine (backup system) constitute a 2 by 2, and the main machine and the backup machine each include two logical operation boards The card realizes 2 out of 2. The input message must go through the 2-out-2 consistency comparison within the system and the consistency comparison between the main and standby machines before it can be sent to the upper laye...

Examples

Embodiment Construction

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0031] figure 1 It is a structural relationship diagram between each board involved in the present invention, and the trackside safety platform includes main and standby systems: A series (A machine), B series (B machine), and each system includes two logic processing boards CPU1_A , CPU2_A, CPU1_B, CPU2_B. The logic operation board receives external input messages from the communication board. The security platform can be run in a single system or in a ...