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Apparatus and method for detecting defect of carbon fiber composite based on electromagnetic chromatography imaging

A technology of electromagnetic tomography and composite materials, applied in the direction of material magnetic variables, etc., can solve problems that are not suitable for rapid on-site detection, etc., and achieve good real-time information processing functions, fast response speed, and convenient use

Inactive Publication Date: 2010-02-24
BEIJING JIAOTONG UNIV
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  • Abstract
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Problems solved by technology

These complex and delicate steps make these techniques very unsuitable for rapid on-site inspection of carbon fiber composites

Method used

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  • Apparatus and method for detecting defect of carbon fiber composite based on electromagnetic chromatography imaging
  • Apparatus and method for detecting defect of carbon fiber composite based on electromagnetic chromatography imaging
  • Apparatus and method for detecting defect of carbon fiber composite based on electromagnetic chromatography imaging

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Embodiment Construction

[0019] specific implementation plan

[0020] Below in conjunction with accompanying drawing, the implementation of the present invention is described in detail as follows:

[0021] Such as figure 1 As shown, the device includes: excitation signal generation and shaping module 101, current amplification and driving excitation coil module 102, excitation coil and detection coil module 103, induction signal recovery conditioning amplification module 104, signal acquisition board 105, PC 106. Wherein, the excitation signal generation and shaping module 101, the current amplification and driving excitation coil module 102 are sequentially connected with the excitation coils in the excitation coil and detection coil module 103, and the detection coil, induction coil in the excitation coil and detection coil module 103 The signal recovery and conditioning amplification module 104, the signal acquisition board 105, and the PC 106 are connected in sequence.

[0022] Such as figure...

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Abstract

The present invention relates to an apparatus and method for detecting defect of carbon fiber composite based on an electromagnetic chromatography imaging technique in a mode of single-coil-excitationmulti-coil induction. The apparatus includes a module for generating and forming excitation signals, a module for amplifying current and driving excitation coil, a module for exciting and detecting coils, a module for sampling back, recuperating and amplifying induction signals, a signal collection board card and a PC machine. The method includes steps feeding an alternation drive current to theexcitation coil so as to induct an alternation excitation magnetic field, the defect of the carbon fiber composite board will change the distribution of the excitation magnetic field; according to electromagnetic induction principle, obtaining an amplitude and a phase of a signal, regenerating an image for reflecting the size and position of the defect in the carbon fiber composite board by an algorithm of regenerating an image through shadow cast, so as to implement a non-contact, non-interposition and rapid nondestructive detection to the carbon fiber composite.

Description

technical field [0001] The invention relates to a nondestructive detection technology of carbon fiber composite materials, in particular to a nondestructive detection device and method for defects of carbon fiber composite materials under the single-coil excitation multi-coil induction mode based on electromagnetic tomography. Background technique [0002] The outstanding mechanical properties of carbon fiber composites, especially the ultra-high strength-to-weight ratio, make it one of the more and more popular materials in the aerospace and automotive industries. Due to its excellent fatigue resistance, impact resistance and residual strength properties, it has been widely used in the manufacture of fuselages, wings and aviation cabins. In the automotive industry, high-pressure vessels made of carbon fiber composites can be used to store compressed gaseous hydrogen in fuel cell vehicles. [0003] For many practical applications, especially in the aerospace industry, the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/82
Inventor 刘泽许羽张晓飞
Owner BEIJING JIAOTONG UNIV
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