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Device and method for measuring carbon fiber reinforced plastic based on electromagnetic sensing

A technology of reinforced plastics and carbon fibers, applied in the direction of material magnetic variable, material impedance, etc., can solve problems such as cumbersome use, unsuitable for rapid and on-site testing in the aviation industry

Inactive Publication Date: 2010-08-25
TIANJIN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, most of these methods require contact measurements, which are cumbersome to use and are not suitable for the rapid and on-site testing that the aviation industry urgently needs

Method used

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  • Device and method for measuring carbon fiber reinforced plastic based on electromagnetic sensing
  • Device and method for measuring carbon fiber reinforced plastic based on electromagnetic sensing
  • Device and method for measuring carbon fiber reinforced plastic based on electromagnetic sensing

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and implementation.

[0018] Referring to Fig. 1 and Fig. 2, the measuring device of the present invention includes a two-core coil sensor of an exciting coil 5 and a receiving coil 6, a signal conditioning and acquisition unit, a power amplifier and a host computer.

[0019] The two magnetic core coil sensors used as excitation and receiving respectively are placed on the carbon fiber reinforced plastic plate 7 or placed close to the top of the CFRP plate, and an angle is fixed. When the distance between the two magnetic core coils is kept constant, according to 5 Rotate the two coils in increments of °; or fix the two magnetic core coils, so that the carbon fiber reinforced plastic plate rotates in increments of 5°, and at each angle, the upper computer controls the excitation signal to the excitation coil 5, and collects the data on the receiving coil 6. indu...

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Abstract

The invention relates to the technical field of non-destructive testing of carbon fiber reinforced plastic (CFRP), in particular to a device for measuring carbon fiber reinforced plastic based on electromagnetic sensing, which comprises an exciting coil, a receiving coil, a signal conditioning and acquisition unit, a power amplifier and a host computer. The exciting coil and the receiving coil formed by winding a wire around a flat magnetic core are both arranged on a carbon fiber reinforced plastic board and are rotated with angles increasing, and an excitation signal is exerted on the exciting coil at each angle so as to collect a sensing signal on the receiving coil; and the host computer is used for processing signals according to the collected signal, so as to find out a carbon fiber extension direction for the carbon fiber reinforced plastic. The invention simultaneously provides a measuring method adopted by the device. Moreover, the invention can rapidly test the carbon fiber reinforced plastic CFRP in a non-contact way under the condition of being non-contact, and has great significance in the testing of aerospace materials.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing of carbon fiber reinforced plastics, and relates to a system for measuring carbon fiber reinforced plastics based on electromagnetic sensing. Background technique [0002] Carbon fiber reinforced plastic (CFRP) is a new type of composite material. Especially in the manufacture of military aircraft, more and more new materials that are lighter and stronger than aluminum and resistant to fatigue and corrosion are used more and more, which will make the aircraft lighter and more flexible, while saving fuel. This material is gradually being used more and more in new civil aircraft. Therefore, in the aviation industry, it is urgent and urgent to develop a technique for non-destructive evaluation of carbon fiber reinforced plastics. C. Boller (C. Boller, R Dilger, In flight aircraft structure health monitoring based on smart structures technology, AGARD Conf. Proc. CP 531 Smart Structu...

Claims

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Application Information

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IPC IPC(8): G01N27/02G01N27/82
Inventor 尹武良姜剑陈立晶宋芸芸
Owner TIANJIN UNIV
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