Double-machine redundancy system based on embedded CPU

A dual-machine redundant, embedded technology, applied in general control systems, control/regulation systems, and response errors, etc., can solve the problems of long switching time, incompatibility, and high communication server prices, achieving enhanced stability, Simplified content and cost-effective effects

Inactive Publication Date: 2007-07-18
NO 711 RES INST CHINA SHIPPING HEAVY IND GRP
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] 1. The price of the communication server is relatively high, and the data capacity of the node that needs redundancy is not large, so it is impossible to use equipment or solutions that are too expensive;
[0005] 2. The redundant monitoring machine has a large amount of I / O data, so it is not suitable for this server solution
Its main disadvantages are: when the first host fails, it is necessary to manually judge the failure of the host and manually switch the two machines; the reliability of the switching device is not high, the switching process is unstable, and the switching time is long

Method used

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  • Double-machine redundancy system based on embedded CPU
  • Double-machine redundancy system based on embedded CPU

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Embodiment Construction

[0019] As shown in FIG. 1 , the dual-machine redundant system of the present invention includes a substrate 10 , a main CPU module 11 , a secondary CPU module 12 , a watchdog circuit 13 and a bus switching unit 14 . The main CPU module 11 , the auxiliary CPU module 12 , the watchdog circuit 13 and the bus switching unit 14 are all mounted on the substrate 10 and connected to each other. The structure of each component is described in detail below.

[0020] The main CPU module 11 and the auxiliary CPU module 12 are modules integrated with components such as a CPU chip, a chipset, and a display chip, and their functions are similar to those of a PC motherboard. In one embodiment, main CPU module 11 and auxiliary CPU module 12 all adopt ETX (Embedded Technology eXtended, embedded technology expands) CPU module, have integrated chipset, north-south bridge, display chip, network chip, Audio controller, Super I / O controller, etc. The interface of the CPU module adopts the standard ...

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Abstract

A dual-machine redundant system based on embedded CPU comprises master CPU module and auxiliary CPU module both being set with a bus interface, watch dog circuit for monitoring operation states of master CPU module and auxiliary CPU module and for outputting watch dog signal presenting their operation state separately, bus switching-over unit for receiving said watch dog signal from control port and for switching over external bus read / write right between master CPU module and auxiliary CPU module according to said watch dog signal.

Description

technical field [0001] The invention relates to a dual-machine redundant system applied to ships, in particular to a dual-machine redundant system based on an embedded CPU. Background technique [0002] There are many application examples of dual-machine redundant systems in industrial sites. A large number of examples in industries such as telecommunications, oil refining, power generation, power distribution, and reservoir monitoring show that the dual-machine redundancy on large-scale systems generally adopts the network redundancy method, that is, Two mutually redundant hosts are connected to the network through the communication server and other devices. The two hosts work at the same time, but only the first host has read and write permissions to the network equipment, and the second host only has the function of reading. It sends data or Command blocked by communication server. [0003] The application of dual-machine redundancy on ships does not adopt this solution,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/20G06F13/40G06F11/07G06F11/00G05B9/03
Inventor 刘赟吕健黄鹤段征刘予学彭宁华陈亚杰
Owner NO 711 RES INST CHINA SHIPPING HEAVY IND GRP
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