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Voting structure for two-out-of-three safety output in static mode and voting method thereof

A safe output, static technology, applied in the direction of response error generation, redundancy in hardware for data error detection, etc., can solve the problems of complex circuit structure, restricting reliability, and high cost, to simplify the circuit structure and meet the reliability requirements. Safety and security requirements, low cost effect

Inactive Publication Date: 2013-09-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The structure of the two-out-of-three voting mode in the dynamic mode has its own fail-safe features, but the circuit structure is complex and there are many components, which restricts its reliability and the cost of the product is relatively high

Method used

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  • Voting structure for two-out-of-three safety output in static mode and voting method thereof
  • Voting structure for two-out-of-three safety output in static mode and voting method thereof
  • Voting structure for two-out-of-three safety output in static mode and voting method thereof

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Embodiment Construction

[0034] In order to describe the present invention more specifically, the voting structure and voting method of the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] like figure 1 As shown, a voting structure of two out of three safety outputs in a static mode, including two diodes, four solid state relays and three optocouplers; among them, the first diode D 1 The anode of the first solid state relay SSR 1 The control terminal is connected and receives the first static control signal A provided by the external device, the first solid state relay SSR 1 The input terminals of the second solid state relay SSR 2 The input terminal is connected and receives the power supply voltage signal VDD provided by the external device, and the second solid state relay SSR 2 The control terminal receives the second static control signal B provided by the external device, and the first solid state r...

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Abstract

The invention discloses a voting structure for two-out-of-three safety output in a static mode, which comprises two diodes and four controllable switches, wherein each two of the controllable switches are firstly connected in series and then connected in parallel; three controllable switches are respectively controlled by using three groups of static control signals; the other controllable switch is controlled by using two groups of static control signals or after logic operation; and two-out-of-three safety output in the static mode is realized. According to the invention, by a reasonable design of a series-parallel connection structure and a simplified circuit structure, reliability and safety of the structure are further enhanced and cost is lower. The invention also discloses a voting method of the voting structure; requirements of a fault-safety computer system for output reliability and safety are satisfied; and simultaneously, the whole structure can work more simply and efficiently.

Description

technical field [0001] The invention belongs to the technical field of computer system fault protection, and in particular relates to a voting structure and a voting method for two out of three safety outputs in a static mode. Background technique [0002] Reliability and security are the most basic and important performance requirements of computer systems in the application of key monitoring systems in the fields of rail transit, aviation, and petrochemical power. Reliability requirements ensure that the computer system can operate without failure for a long time; but since any computer system cannot fail to fail, safety requirements ensure that the system can lead to safety in the event of any part failure, that is, the consequences of system failure will not Can cause serious damage to personnel and property. The fail-safe computer system is designed for this application; one of the key parts in the fail-safe computer system to ensure its reliability and safety is the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/16
Inventor 黄海陈祥献汪政
Owner ZHEJIANG UNIV