Electrostatic charge attenuation test system and test method thereof

Abstract

The invention discloses an electrostatic charge attenuation test system and a test method thereof. According to the invention, a soft X-ray electricity injection method is utilized to charge a tested sample, and an arrayed conformal non-contact electret electrostatic induction probe is utilized to measure the potential of each point on the surface of the tested sample, so that the accurate control of the potential is realized. The electrostatic field effect of the electret is utilized to enable the shielding electrode to have a suspension potential, and the shielding electrode is enabled to switch a grounding state and a suspension state at high frequency to modulate an induction current signal of the induction electrode into a high-frequency alternating current signal, so that the potential measurement sensitivity is greatly improved. Furthermore, point-to-point measurement of the potential of the surface of the tested sample is realized through the induction electrodes arranged in an array, so that the three-dimensional dynamic change of the overall potential of the surface of the tested sample is obtained. Rapid switching between power injection and potential measurement of the tested sample of the system can be achieved without a movable mechanical component, and the device has the advantages of being simple in structure, high in universality, good in controllability and the like.

Description

technical field [0001] The invention relates to electrostatic charge decay testing technology, in particular to an electrostatic charge decay testing system and a testing method based on an electret and ray injection method. Background technique [0002] In the fields of production and life, military defense, aerospace and other fields, discharge accidents caused by the accumulation of static electricity in materials emerge in endlessly. In order to reduce the accumulation of static electricity and reduce the probability of discharge accidents, experts and scholars have carried out research on the static decay characteristics of materials based on electrostatic charge decay tests, in order to achieve the purpose of evaluating the electrostatic dissipation capacity of materials and screening suitable materials. [0003] Since the electrostatic dissipation capacity of a material is related to the properties of the material itself and the initial charge distribution, it usually...

AI Technical Summary

Problems solved by technology

The electrode charging method is only suitable for measuring the electrostatic attenuation performance of a single-layer uniform material. For composite materials, due to the capacitive effect between the electrode and the multi-layer material, it cannot fully reflect its electrostatic attenuation performance; the corona spray method is equipped with a special shielding The mechanism prevents the charge and electric field generated by corona discharge from affecting the potentiometer measurement, which requires an additional mechanical transmission mechanism to quickly place the test sample under the potentiometer for measurement. Therefore, the corona spray method has high discharge voltage and mechanical structure. Complicated and unable to control the surface charging potential of the tested sample; the triboelectrification method requires a mechanical mechanism to drive the friction rod, and there are also problems such as complex mechanical structure and uncontrollable surface charging potential of the tested sample. At the same time, the triboelectric charge of the tested sample is affected by the environment Large impact, poor experimental repeatability

At the same time, the dissipation of charge on the surface of the tested sample is a three-dimensional dynamic process. The existing non-contact potentiometer probe has a large volume and low spatial resolution, and can only measure the potential change of a fixed area on the surface of the tested sample. Obtain the dynamic potential of the entire surface of the tested sample, and cannot study the overall dissipation characteristics of the surface charge of the tested sample

In addition, most of the material structures in practical applications are non-planar structures, and the existing methods and devices are unable to measure the surface potential of the tested samples with irregular curvatures.

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