Device and method for detecting debonding defects of carbon fiber composite material

Abstract

The invention discloses a device and a method for detecting debonding defects of a carbon fiber composite material. The device comprises a stimulating component and a plurality of detecting components, wherein the stimulating component is used for generating a stimulating magnetic field and comprises a cuboid magnetic core and an exciting coil winding the cuboid magnetic core; the detecting components are used for detecting induced magnetic fields influenced by a disturbed magnetic field and are uniformly arrayed below the stimulating component, the arraying direction of the detecting component is parallel with long sides of the cuboid magnetic core, and the detecting components are distributed opposite to the stimulating component; and a detecting coil is located between the exciting coil and a to-be-detected carbon fiber composite material during the detection. According to the detecting device and method provided by the invention, the rapid and real-time local detection can be realized, and furthermore, the detection range is not influenced by the space size of the detecting device.

Description

technical field [0001] The invention relates to the field of detection, in particular to a detection device and method for debonding defects of carbon fiber composite materials. Background technique [0002] Carbon fiber composite materials have the characteristics of general carbon materials, such as friction resistance, electrical conductivity, heat conduction and corrosion resistance, etc., and also have excellent fatigue resistance and impact resistance, especially with ultra-high strength-to-weight ratio and hardness-to-weight ratio, widely used Used in aerospace and automotive industries. Carbon fiber composites have become an indispensable industrial material, therefore, it becomes particularly important to develop non-destructive testing systems for such materials. [0003] At present, when eddy current testing technology is used to detect debonding defects of carbon fiber composite materials, closed detection system devices are mostly used for detection. Due to the...

AI Technical Summary

Problems solved by technology

For this kind of detection device, due to the limitation of the detection space range of the detection device, it is impossible to detect the too large flat plate component to be inspected; the inspection cost is increased and the detection efficiency is reduced due to the global imaging of the too small flat plate component to be inspected. , inconvenient operation, etc.

Moreover, during the detection process, the magnetic field generated by the excitation coil propagates outwards from itself, so that the intensity of the excitation magnetic field gradually decays, and it passes through the carbon fiber composite material under inspection very unevenly. On the one hand, each area of ​​the carbon fiber composite material under inspection feels The detected magnetic field strength is uneven, which has a certain impact on the accuracy of the detection results. On the other hand, the magnetic induction intensity obtained by the carbon fiber composite material at the center of the detection system is the weakest, making it difficult for the detection coil to pick up the detection signal. The obtained detection signal will also be very weak, resulting in the lowest detection sensitivity and easy to cause missed detection

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