Inductance testing device and method for wave-absorbing material

Abstract

The invention discloses an inductance testing device and method for a wave-absorbing material, and the device comprises an LCR testing instrument, a coil and a test jig. The LCR testing instrument andthe coil are connected by a metal wire. The test jig has upper and lower layers. In other words, the lower table is fixed, the middle part is provided with a groove which enables the coil to be fixedin the groove, and a film is placed on the lower table surface. A lower pressure cylinder drives an upper pressure plate to move up and down and generates a certain pressure, so as to achieve close contact with the upper and lower parts, and then the LCR testing instrument is connected with the coil through the metal wire, so as to measure the inductance value of the wave-absorbing material, anddetermines whether the inductance of the wave-absorbing material is qualified or not through the reference of the "Inductance Value and Thickness Standard Correspondence Table", so as to detect the performance of a product. The device of the invention can achieve the measurement of different points of a single film or measurement of the single film for many times, and achieves 100% quality monitoring on the basis that the wave-absorbing material is not damaged, and enables processed wave-absorbing material to meet the requirements of a customer for the quality.

Description

technical field [0001] The invention relates to an inductance testing device and a testing method of a wave-absorbing material, belonging to the technical field of wave-absorbing material testing. Background technique [0002] Controlling electromagnetic pollution and developing and preparing a material that can resist and weaken electromagnetic radiation—absorbing materials—is a major direction of today's material manufacturing industry. [0003] Common coated wave-absorbing materials are composed of binders and absorbents, which are simple and practical to manufacture. However, the surface of the coated wave absorbing material is rough, brittle, too thick, and its performance is poor, so it cannot be directly used in the field of radiation protection. It needs to go through a series of production processes to change the appearance and performance of the ferrite wave absorbing material. In order to meet the quality requirements of customers, the product performance needs t...

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Problems solved by technology

However, the surface of the coated wave absorbing material is rough, brittle, too thick, and its performance is poor, so it cannot be directly used in the field of radiation protection. It needs to go through a series of production processes to change the appearance and performance of the ferrite wave absorbing material. In order to meet the quality requirements of customers, the product performance needs to be monitored during the processing process. The traditional monitoring method is to measure the destructive magnetic permeability of the absorbing material to achieve quality monitoring. Because the destructive test is only for the product during the production process Sampling inspection, due to the fluctuation of process factors, the product quality will be unstable. At this time, 100% quality monitoring cannot be carried out, resulting in the flow of defective products to the client, and finally to consumers. Therefore, how to achieve 100% quality without destroying the product Monitoring has great practical significance for quality monitoring in the production process

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