High-safety redundant buffering queue implementing method

A technology of buffer queue and safety redundancy, which is applied in the field of realization of high-security redundant buffer queue, can solve the problems such as the influence of synchronization signal accuracy and data discarding, and reduce the probability of delayed arrival data being discarded, which is practical The effect of high reliability and strong portability

Active Publication Date: 2010-06-02
NANJING NRIET IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a lag in the comparison operation, but it can meet the synchronization requirements of the system. Most data only needs to be traversed and compared once. However, this method is greatly affected by the accuracy of the synchronization signal, and the data arriving before or after the synchronization time may be discarded.

Method used

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  • High-safety redundant buffering queue implementing method
  • High-safety redundant buffering queue implementing method
  • High-safety redundant buffering queue implementing method

Examples

Experimental program
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Embodiment

[0033] Embodiment: Take two out of two safety redundant system as an example. In order to facilitate the explanation of the embodiment, first introduce the working mechanism of the redundant safety system. The safety system is driven by a work synchronization interrupt, such as Figure 4 Shown: After the system initialization is completed, the two parallel tasks of the data management part (left) and the external data receiving part (right) are carried out at the same time. The process on the left is driven by synchronous work interrupts generated at regular intervals. When the moment of reporting interrupts, processing interrupts, exchange interrupts, sending interrupts, and query interrupts arrives, corresponding work status changes are made respectively, and enter active query data, buffer queue reporting, Data processing, data exchange, buffer queue delivery and other workflows. Since the arrival of external data is unpredictable, it is received and written into the repor...

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Abstract

The invention aims at providing a method for realizing a high-security redundant buffer queue. The method comprises a data reporting process and a data issuing process, wherein, the data reporting process is realized by the following steps: an inner comparison domain setting step, a pre-treatment step, a step of calculating the outer comparison domain boundary, a data comparison step and a data reporting step; and the data issuing process is realized by the following steps: a data comparison step, a reporting mistake step and an issuing data step. The method increases the two-stage comparisondomains by software, improves and adopts the centralized comparison way due to the system reporting interruption, can provide efficient and safe buffer comparison function, and meanwhile can effectively reduce data loss probability due to delayed arrival.

Description

technical field [0001] The invention relates to a multi-calculation redundant system, in particular to a method for realizing a high-safety redundant buffer queue. Background technique [0002] In the field of automatic control systems that involve significant personal and equipment safety, the system is required to have extremely high security. And the single point of failure of communication will affect the security of the system. Therefore, the multi-computing redundant system came into being as the times require. Take the two-out-of-two redundant system as an example, two sets of computing devices are set up in one system, both of which have communication channels with the external and local field ports, and there are communication channels between the computing devices. All communication data or collected data need to be buffered and compared after they arrive, and the calculation is performed only when they are consistent. The results of the calculation also need to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/02
Inventor 束元
Owner NANJING NRIET IND CORP
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