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Method for detecting discontinuity of nonmetallic material by utilizing eddy current impedance plane detector

A non-metallic material, impedance plane technology, applied in the direction of material magnetic variables, etc., can solve the problems of electromagnetic non-destructive testing method metal material discontinuity detection and other problems, and achieve the effect of improving detection efficiency

Active Publication Date: 2014-07-23
EDDYSUN (XIAMEN) ELECTRONICS CO LTD
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  • Abstract
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Problems solved by technology

Electromagnetic nondestructive testing methods are currently only used for discontinuity detection in metallic materials

Method used

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  • Method for detecting discontinuity of nonmetallic material by utilizing eddy current impedance plane detector
  • Method for detecting discontinuity of nonmetallic material by utilizing eddy current impedance plane detector

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Embodiment Construction

[0017] exist figure 1 , figure 2 In the shown embodiment, the eddy current impedance plane detector is used to detect the discontinuity of non-metallic materials, and the characteristics of the distribution and magnetic induction intensity of the magnetic field 3 caused by the change of the medium in the magnetic field 3 are used, and the eddy current impedance plane detector is used to detect non-metallic materials. Discontinuity in metallic materials; according to the magnetic induction formula = mu 0 mu r , it can be known that the magnetic induction The relative permeability of the medium to the magnetic field mu r related, and the relative permittivity of the medium mu r and relative permittivity ε r Related, when there is a discontinuity in the medium, the relative permittivity of the medium ε r will change, causing the distribution of the magnetic field 3 and the magnetic induction intensity to change, thereby causing the impedance of the detection ...

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Abstract

The invention discloses a method for detecting discontinuity of a nonmetallic material by utilizing an eddy current impedance plane detector. The method is characterized in that by utilizing the characteristics that magnetic induction intensity and distribution of a magnetic field are changed caused by medium change in the magnetic field based on an electromagnetic field principle, and the discontinuity of the nonmetallic material is detected by utilizing the eddy current impedance plane detector. The current nondestructive testing theoretical limit is broken through, an electromagnetic eddy current detection method is applied to discontinuity detection of the nonmetallic material, the detection efficiency is improved, and automatic detection of the discontinuity of the nonmetallic material is easily realized.

Description

Technical field [0001] The invention relates to a non-destructive detection method, in particular to a method for detecting discontinuity of non-metallic materials by using an eddy current impedance plane detector. Background technique [0002] For the discontinuity detection of non-metallic materials, the currently used non-destructive testing methods include acoustic, mechanical, ray and other detection methods. Electromagnetic nondestructive testing methods are currently only used for discontinuity detection in metallic materials. Among the electromagnetic nondestructive testing methods, the eddy current testing method has the advantages of high detection accuracy, fast detection speed, and easy automatic detection compared with acoustic, mechanical, and ray detection methods. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for detecting discontinuity of non-metallic materials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/90
Inventor 林俊明
Owner EDDYSUN (XIAMEN) ELECTRONICS CO LTD
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