Potential distribution test method for wide-band large metal plate

Abstract

The invention discloses a method for testing potential distribution of a wide band large-scale metal plate. The method for testing the potential distribution of the wide band large-scale metal plate comprises testing cables, a pre-amplifier and a spectrum analyzer. The testing cables comprise insulating layers and shielding layers. The method mainly comprises the following steps that the shielding layer ends of the testing cables are in reliable electrical connection with the test points of the large-scale metal plate, and the other ends of the testing cables are hung in the air; the external conductor of the signal input end of the pre-amplifier is in reliable electrical connection with reference points, and the signal output end of the pre-amplifier is connected with the spectrum analyzer; the spectrum analyzer is set according to testing requirements; the potential distribution of the metal plate is acquired according to the result of the spectrum analyzer. The method carries out the test of the potential distribution of the wide band large-scale metal plate based on the shielding layers of the cables and the coupling mechanism of inner conductors, not only effectively solves the interference problem of complex electromagnetic environments, but also solves the transmission problem of high-frequency signals.

Description

technical field [0001] The invention belongs to the field of electromagnetic compatibility testing, and in particular relates to a potential distribution testing method of a wide-band large metal plate. Background technique [0002] When the electronic equipment on the metal structure platform is working, common ground impedance interference will be formed. When designing the overall equipment common ground impedance interference suppression, it is necessary to accurately grasp the ground potential distribution of the metal ground plate in order to effectively control the common ground impedance interference. . Although the simple metal plate ground potential distribution characteristics can be obtained through computer simulation, there is a lack of verification means for the simulation calculation results, and it is impossible to determine whether the data is accurate, so that the calculation results cannot be applied to actual engineering design. [0003] The existing te...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for testing the potential distribution of a wide-band large metal plate, which solves the defects in the prior art that it is difficult to shield the interference by directly measuring the potential and the result is not accurate enough

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