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A Method for Capacitance Detection of Non-Metallic Material Discontinuity in Series Resonant Circuit

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

Active Publication Date: 2016-06-22
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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  • A Method for Capacitance Detection of Non-Metallic Material Discontinuity in Series Resonant Circuit

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Embodiment Construction

[0017] exist figure 1 In the shown embodiment, a method for detecting the discontinuity of non-metallic materials by the capacitance of a series resonant circuit adopts the capacitance C in the series resonant circuit device as the detection sensor for detecting the discontinuity of non-metallic materials. At this time, the series resonance There is a hole or a gap between the two plates of the capacitor C in the circuit device, and the non-metallic material A to be inspected can pass through the hole or gap between the two plates; according to the capacitance formula C=ε r ε 0 S / d and series resonant circuit resonant frequency calculation formula 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 between the two plates of the capacitance C ε r Related, when there is a discontinuity in the medium, the relative permittivity of the medium ε r will change, resulting in the...

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Abstract

The invention discloses a method for detecting non-metallic material discontinuity by a series resonance circuit capacitor. The capacitor in a series resonance circuit device is adopted as a detection sensor on the basis of an electromagnetic principle, the non-metallic material discontinuity is detected according to the characteristics that the resonant frequency of a series resonance circuit changes along with medium change between two pole plates of the capacitor, the limit of a current nondestructive testing theory is broken through, when the electromagnetic detection method is applied to detection of the non-metallic material discontinuity, automatic detection is easily achieved, and the efficiency and the accuracy of detection on the non-metallic material discontinuity are improved.

Description

Technical field [0001] The invention relates to a non-destructive testing method, in particular to a method for detecting the discontinuity of non-metallic materials by capacitance of a series resonant circuit. 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. 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 [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for detecting the discontinuity of non-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/24
Inventor 林俊明
Owner EDDYSUN (XIAMEN) ELECTRONICS CO LTD
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