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Method for detecting discontinuity of nonmetal material by virtue of inductance of series resonant circuit

A series resonant circuit and non-metallic material technology, applied in the field of non-destructive testing, can solve the problems of electromagnetic non-destructive testing methods such as discontinuity detection of metal materials, achieve the effect of easy automatic detection, improve detection efficiency and detection accuracy

Active Publication Date: 2014-07-30
EDDYSUN (XIAMEN) ELECTRONICS CO LTD
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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 nonmetal material by virtue of inductance of series resonant circuit

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Embodiment Construction

[0018] exist figure 1 In the shown embodiment, a method for inductively detecting the discontinuity of non-metallic materials in a series resonant circuit, the inductance coil L in the series resonant circuit device is used as a detection sensor for detecting discontinuity of non-metallic materials, and the non-metallic materials to be detected A can axially pass through the inductance coil L; according to the inductance formula L = mu 0 mu r N 2 A / l , the inductance of the inductor coil L The relative permeability of the medium in the inductor coil mu r related, and the relative permittivity of the medium mu r The relative permittivity of the medium ε r Related, according to the formula for calculating the resonant frequency of the series resonant circuit f 0 = 1 / (2 π ( LC ) 1 / 2 ) shows that the resonant frequency of the series resonant circuit RLC f 0 The relative permittivity of the medium in the inductor coil L ε r Related, when there is a disco...

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Abstract

The invention provides a method for detecting discontinuity of a nonmetal material by virtue of inductance of a series resonant circuit. The method has the beneficial effects that the discontinuity of the nonmetal material is detected by virtue of an inductance coil in a series resonant circuit device based on an electromagnetic principle, and the limitation of a current nondestructive testing theory is broken through by virtue of the characteristic that the resonant frequency of the series resonant circuit is changed due to the changing of a medium in the inductance coil in the series resonant circuit; by applying the electromagnetic detection method to the detection on the discontinuity of the nonmetal material, the automatic detection is easy to implement, and the efficiency and precision of detection on the discontinuity of the nonmetal material are improved.

Description

[0001] A method to test discontinuity of nonmetallic material through the inductance of series resonance circuit Technical field [0002] The invention relates to a non-destructive detection method, in particular to a method for inductively detecting the discontinuity of non-metallic materials with a series resonant circuit. Background technique [0003] 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. Compared with acoustic, mechanical, ray and other detection methods, electromagnetic detection has the advantages of high detection accuracy, fast detection speed, and easy automatic detection. Among them, the resonant circuit has extremely high detection sensitivity. Contents of the invention [0004] The purpose of the present inv...

Claims

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Application Information

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IPC IPC(8): G01N27/00
Inventor 林俊明
Owner EDDYSUN (XIAMEN) ELECTRONICS CO LTD
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