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Confirming method of same frequency multiple interference for electromagnetic coupling weak path

An electromagnetic coupling and determination method technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as poor pertinence, time-consuming and labor-intensive problems, and achieve the effect of low cost and electromagnetic compatibility problems

Active Publication Date: 2013-07-10
BEIHANG UNIV
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Problems solved by technology

[0004] The present invention converts the coupling relationship between multiple interference pairs into a directed graph, and adopts the method of the shortest path tracing, so as to solve the problem of not strong pertinence, time-consuming and labor-intensive point-by-point investigation relying on experience in the past

Method used

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  • Confirming method of same frequency multiple interference for electromagnetic coupling weak path
  • Confirming method of same frequency multiple interference for electromagnetic coupling weak path
  • Confirming method of same frequency multiple interference for electromagnetic coupling weak path

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Embodiment

[0058] A system includes equipment such as fire control, ultrashort wave, short wave, and processor. During the system joint debugging test, it was found that both the processor and the ultrashort wave were subject to interference signals with a frequency of 200MHz. After analysis, it is found that the 200MHz interference signal comes from the fire control and short-wave radio stations.

[0059] pass Figure 4 The working principle diagram shown analyzes the possible interference links of fire control and short-wave radio interference processors and ultra-short-wave equipment, and the main interference paths can be obtained as follows:

[0060] 1) The stray signal of the fire control enters the public power supply through the crosstalk of the power line, which interferes with the ultrashort wave;

[0061] 2) The stray signal of fire control radiates to the space through the cable, and is received by the ultrashort wave antenna to cause interference;

[0062] 3) The stray sig...

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Abstract

The invention discloses a confirming method of same frequency multiple interference for an electromagnetic coupling weak path, and belongs to the technical field of electromagnetic compatibility. Electromagnetic coupling relations of a plurality of interference sources and a plurality of sensitive points in a system are translated into digraphs, and sides of the coupling digraphs are valued through simulation and testing; then coupling paths where interference can be most easily generated between each interference source and each sensitive body are found from an electromagnetic coupling network in the same valued coupling digraph through a shortest-path tracking method for a plurality of times; and finally the same interference coupling path is extracted form a weak path from the each interference source to the each sensitive body, key rectification is conducted aiming at the weak path of repeated coupling, and therefore maintenance and strengthening of system electromagnetic compatibility faults are efficiently and accurately achieved, and electromagnetic compatibility problems can be accurately and effectively solved with low cost.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic compatibility, and relates to a method for finding a weak path of electromagnetic compatibility coupling between multiple interference sources and multiple sensitive points of the same frequency, more precisely, it is a method for interfering between multiple interference equipment pairs at the same frequency point. A method for the determination of weak paths of electromagnetic coupling. Background technique [0002] In the cooperative work of multiple electronic devices, the electromagnetic interference generated by one device will be coupled to another device through conducted emission (CE) and radiated emission (RE), causing the performance of the other device to decline, or even malfunction . With the increasing integration and complexity of electronic systems, the electromagnetic coupling relationship between interference equipment and sensitive equipment is becoming more and more c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 苏航吴亮贾云峰苏东林刘焱魏嘉利胡修
Owner BEIHANG UNIV
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