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Method for measuring thickness of foam plastic board with eddy current method

A foamed plastic, eddy current technology, applied in electromagnetic measurement devices, electrical/magnetic thickness measurement, etc., can solve the problems of poor coupling effect, sound wave attenuation, ultrasonic equipment cannot use foamed plastic thickness measurement, etc., to achieve stable detection and test equipment. The effect of general, simple data processing methods

Inactive Publication Date: 2015-04-29
SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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Problems solved by technology

[0003] Ultrasonic equipment is also a commonly used thickness measuring equipment, but because there are countless bubbles and hole interfaces in the thickness direction of foamed plastics, the sound waves of ultrasonic equipment will reflect and attenuate when they meet the interface. Very serious, and due to the porosity of the foam surface, the coupling effect is poor, so ultrasonic equipment cannot be used for thickness measurement of foam plastics

Method used

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  • Method for measuring thickness of foam plastic board with eddy current method

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] Such as figure 1 As shown, the MINITEST4100 precision coating thickness gauge of German EPK company is adopted in the present invention, and the N100 type probe is used to detect the actual thickness of various density foam plastic plates with a thickness of 0 ~ 100mm glued on the metal plate.

[0020] exist figure 1 , N100 probe 5 is placed on the surface of foam plastic 3, and pressure is applied according to the use requirements of N100 probe 5, and N100 probe 5 is firmly attached to foam plastic 3, read on MINITEST4100 host 4, and the display (MINITEST4100 thickness measurement data), according to Calculating the actual thickness of the foam . Among them, c is a proportional coefficient obtained through experience, and c can be determined by comparing and analyzing the thickness measurement data of the bonded foam plastic alum...

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Abstract

The invention provides a method for measuring thickness of foam plastic. The method comprises steps as follows: (1), a probe of an eddy current thickness measurement instrument is put on a surface of the foam plastic; (2), pressure is exerted according to a use requirement of the probe; (3), the thickness of the measured foam plastic is obtained according to a number displayed on a reading dial of a host of the eddy current thickness measurement instrument. The method solves the problem that the foam plastic is damaged during thickness measurement with a conventional foam plastic thickness measurement method.

Description

technical field [0001] The invention relates to a thickness measuring method, in particular to a method for measuring the thickness of a single-curved polyurethane foam plastic plate by using an eddy current method. Background technique [0002] Foam plastic is a porous structure material, and the commonly used method of thickness measurement is needle punching, which tends to leave puncture holes inside after needle punching. This method has the problem of destroying the integrity of foam plastic, resulting in a decrease in the heat insulation and waterproof performance of foam plastic. [0003] Ultrasonic equipment is also a commonly used thickness measuring equipment, but because there are countless bubbles and hole interfaces in the thickness direction of foamed plastics, the sound waves of ultrasonic equipment will reflect and attenuate when they meet the interface. It is very serious, and due to the porosity of the surface of foamed plastics, the coupling effect is poo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/06
Inventor 南博华何腾锋来永亮于淼郝冬冬
Owner SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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