Deposited water defect damage detection method and system for inner part of composite material based on microwave excitation

A composite material and damage detection technology, which is applied in the direction of using microwave flaw detection, material analysis, and material analysis through optical means, can solve problems such as difficult detection of water droplets, infrared anomalies, and potential safety hazards, and achieve good detection results, clear relationships, and Energy Saving Effect
CN104297265AInactive Publication Date: 2015-01-21NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2015-01-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a deposited water defect damage detection method and system for the inner part of a composite material based on microwave excitation. The method mainly comprises the following steps: recording surface infrared radiation of a region to be detected and a change process of a temperature field of the region by adopting a thermal infrared imager (5); analyzing a temperature abnormal region by adopting a microwave excitation selective action principle, and displaying the position and the size of the temperature abnormal region and the change of a temperature difference of a peripheral temperature normal region; and outputting a judging result of the existence of deposited water defects and degrees in the inner part of the composite material, wherein according to the microwave excitation selective action principle, the microwave excitation only has effects on deposited water in a non-conductive composite material, the deposited water can be determined when a high-temperature region exists and other defects do not exist. The method has high detection sensitivity and the result is accurate and reliable; and the operation is convenient and the checking time is short.
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Description

technical field

[0001] The invention relates to inspection technology for water accumulation defects inside composite materials, in particular to the analysis of the presence or absence of water accumulation defects and the amount of water accumulation in the internal structure of non-conductive composite materials (including honeycomb, interlayer, sandwich, etc.), and belongs to the safety guarantee of composite material structures field. Background technique

[0002] Composite material structure is a combination of various materials according to functional needs. Because of its unique characteristics such as high specific strength and high specific stiffness, it has been widely used in aerospace, wind power generation, transportation, construction engineering and other fields. In order to reduce the weight of the structure, composite materials often adopt structural forms such as honeycomb, sandwich, and sandwich, and there are many voids inside. Under the action of exter...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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