Multi-channel thermal stimulus current measuring device used for dielectric substances

Abstract

The invention relates to a multi-channel thermal stimulus current measuring device used for dielectric substances, and belongs to the technical field of insulation material performance testing. The multi-channel thermal stimulus current measuring device comprises a vacuum thermal insulation barrel and a measuring cavity body, wherein the measuring cavity body is placed in the vacuum thermal insulation barrel, and liquid nitrogen is filled between the measuring cavity body and the vacuum cavity body. A top cover is arranged on the measuring cavity body; a supporting column, a vacuumizing valve and a vacuum plug are arranged on the top cover; a cable guide core is arranged in the supporting column; a fixed column in the measuring cavity body is fixed to the top cover; an upper partition plate, a lower partition plate, an upper fixed plate and a lower fixed plate are fixed relative to the fixed column; a conductive column is fixed relative to the upper partition plate and the lower partition plate, and is communicated with the cable guide core; a round conducting plate is fixed to the upper fixed plate, and is communicated with the conductive column; after being installed axially, an upper electrode supporting column, an upper electrode, a lower electrode and a lower electrode supporting column are fixed between the upper fixed plate and the lower fixed plate. The multi-channel thermal stimulus current measuring device used for the dielectric substances greatly shortens measuring time required by the same sample number, the average liquid nitrogen consumption of samples is greatly reduced, testing efficiency is obviously improved and measuring cost is obviously reduced.

Description

technical field [0001] The invention relates to a multi-channel thermal stimulation current measuring device for dielectric materials, belonging to the technical field of performance testing of insulating materials. Background technique [0002] The dielectric and conductive properties and charge storage properties of dielectric materials are closely related to the type, quantity, nature, state, and behavior of carriers in various stimuli such as electricity, light, and heat. The study of the charge storage and transport process is crucial to the study of the microstructure mechanism corresponding to the macroscopic electrical properties of dielectric materials, the modification of dielectric materials and the research of new dielectric materials. Thermally stimulated current is one of the most commonly used and effective tools for this research. The thermally stimulated current method is a technology developed on the basis of medium physics, which is used to measure the mi...

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Problems solved by technology

[0006] The multi-channel thermally stimulated current measurement device for dielectric materials proposed by the present invention has the advantage of solving the problem of poor repeatability in the measurement of single-sample thermally stimulated current in the prior art. In the case of ensuring interference signal shielding and measurement accuracy Under this condition, thermally stimulated current spectra of multiple dielectric material samples can be obtained through one measurement

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