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A test method and test system technology, applied in error detection/correction, instruments, electrical digital data processing, etc., can solve the problems of reliability judgment dependence, complex hardware implementation, etc., to achieve strong detection reliability, simple implementation, proactive The effect of the protection system
Active Publication Date: 2015-03-25
SHANDONG INST OF ADVANCED TECH CHINESE ACAD OF SCI CO LTD
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Problems solved by technology
[0004] For this reason, the technical problem to be solved by the present invention is to overcome the problem in the prior art that the reliability judgment depends on hardware and realizes complicated problems, and provides a bus reliability testing method
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Embodiment 1
[0038] As an embodiment of the present invention, a kind of bus reliability test method, such as figure 1 shown, including the following steps:
[0039] Numbering step: there are n nodes on the bus, and the n nodes are numbered.
[0040] The step of collecting communication judgment results: it further includes steps S0, S1, S2, S3 and S4,
[0041] S0: judge whether it is the first reliability judgment, if so, then make m=2 and then go to step S1; otherwise, make m=m+1, if m is not greater than n this time, then repeat steps S1-S3, If m is greater than n at this time, go to step S4, wherein n is an integer greater than or equal to 2, and m is an integer greater than or equal to 1 and less than or equal to n.
[0042] S1: node m-1 sends a reliability judgment instruction to node m in cycle T1; wherein, the bus includes n nodes; the node m-1 and the node m can be directly connected or indirectly connected, the present invention The direct connection referred to in is a physic...
Embodiment 2
[0058] As an embodiment of the present invention, on the basis of the above embodiments, when the communication is abnormal, a step of stopping the operation of the node m is further included. It can actively stop operation when abnormal communication occurs, and has the advantage of active protection system.
Embodiment 3
[0060] As an embodiment of the present invention, on the basis of embodiment 1 or 2, the threshold
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Abstract
The invention relates to a bus reliability testing method. Communication judging results between all nodes are collected, statistics is carried out, namely a node m-1 sends a reliability judging instruction to a node m with a cycle T1; the node m adds 1 to p each time the node m receives the reliability judging instruction sent by the node m-1; the node m is interrupted with the cycle T2, during interrupting, whether communication between the node m-1 and the node m is abnormal is judged, namely p is compared with q, if p is smaller than q, communication is abnormal; otherwise, communication is normal; after judging, the communication judging results are output; after traversal is carried out on all the nodes, the communication judging results between all the nodes are collected, and communication abnormality statistics is carried out. After statistics, p is reset, and a next interrupting cycle is started. According to the method, the reliability of a bus is tested by sending the reliability judging instruction, so that the method does not depend on any hardware collecting device and is not limited by a specific bus protocol, and the method is suitable for all bus types and has the advantages of being simple in implementation mode and high in testing reliability.
Description
technical field [0001] The invention relates to bus testing, in particular to a bus reliability testing method and system. Background technique [0002] Distributed control system is a widely used control system. Several nodes in the system are connected to form a certain bus topology through the bus to realize time-sharing and independent node control, which makes the control system have better openness and scalability. In order to ensure the controllability of each node in the distributed control system, the reliability of the bus is very important. Due to the influence of the reliability of the physical connection of the bus, bus load, bandwidth, electromagnetic interference and other factors, sometimes the information transmission in the bus is not smooth, resulting in the failure of key control information and status information between nodes. Make smooth interactions that affect the performance of the control system. [0003] Chinese patent CN201210035707.7 proposes...
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Application Information
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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/267
Inventor 徐国卿徐坤李卫民常明
Owner SHANDONG INST OF ADVANCED TECH CHINESE ACAD OF SCI CO LTD
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