Method and device for detecting thickness of multi-layer conductive coating through vortex

A conductive coating, eddy current detection technology, applied in electromagnetic measurement devices, electric/magnetic thickness measurement and other directions, can solve the problem of time-consuming and other problems, and achieve the effect of simple detection device, easy implementation and high detection accuracy

Inactive Publication Date: 2014-06-11
UNIV OF ELECTRONICS SCI & TECH OF CHINA +1
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Problems solved by technology

[0020] ·This inversion method is time-consuming, especially when solving multi-parameters, it also requires computer operation

Method used

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  • Method and device for detecting thickness of multi-layer conductive coating through vortex
  • Method and device for detecting thickness of multi-layer conductive coating through vortex

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Embodiment Construction

[0057] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0058] Such as figure 1 As shown, the eddy current detection device of the thickness of the multilayer conductive coating of the present invention includes a multi-frequency sinusoidal excitation signal generation module, a probe, a Hall sensor, a filter amplification module, a multi-frequency signal separation module, a signal acquisition module, an operation module and a display Module; the multi-frequency sinusoidal excitation signal generation module is connected to the probe, the Hall sensor is attached to the probe, and the Hall sensor, filter amplification module, multi-frequency signal separation module, signal acquisition module, calculation module and display module are connected in sequence. The multi-frequency sinusoidal excitation signal generation module is composed of at least one ICL8038 oscillating integrated circuit and one A...

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Abstract

The invention discloses a method and a device for detecting the thickness of a multi-layer conductive coating through a vortex. The device comprises a multi-frequency sine excitation signal generation module, a probe, a hall sensor, a filtering and amplifying module, a multi-frequency signal separation module, a signal collection module, an operation module and a display module, wherein the device is used for detecting the thickness of the multi-layer conductive coating through four steps. The method and the device are capable of detecting the thickness of the multi-layer conductive coating; the detection device is simple and excellent in portability; an inverse algorithm is simple and clear in process and easy to implement; the device is high in detection precision.

Description

technical field [0001] The invention belongs to the field of nondestructive testing, in particular to an eddy current testing method and device for the thickness of a multilayer conductive coating. Background technique [0002] Thickness detection of multilayer conductive structures is an urgent problem to be solved in many important fields. Compared with other non-destructive testing techniques, the eddy current testing method has high sensitivity, is suitable for conductive materials, low cost, does not require couplant, and can be used in special occasions that are difficult to detect such as high temperature, thin tubes, thin wires and inner hollow surfaces, etc. Therefore, eddy current testing technology can be used to detect the thickness of multi-layer conductive structures. [0003] According to the theory of eddy current testing, when the coil structure of the eddy current probe is fixed and the excitation frequency is fixed, the thickness of the surface of the mea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/06
Inventor 于亚婷王飞来超张德俊危荃
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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