Composite component interface rapid imaging quantitative detection method based on full-matrix data

Abstract

The invention belongs to the technical field of defect detection, and particularly relates to a composite component interface rapid imaging quantitative detection method based on full-matrix data. Themethod comprises the following steps: 1) full-matrix data acquisition; 2) adopting a sector-scanning rapid imaging algorithm or a full-focusing rapid imaging algorithm based on the full-matrix data to realize rapid sector-scanning or full-focusing imaging of a component; 3) carrying out threshold processing on the imaging result by adopting a quantitative method aiming at the debonding detectioncharacteristics of the composite component, and determining an effective debonding area; and 4) performing binarization processing on the imaging result after threshold processing to obtain position and size information of the debonding defect, thereby realizing quick imaging quantitative detection of the interface bonding quality of the composite component based on the full-matrix data. Accordingto the method, the full-matrix data acquisition mode is adopted, when each sampling point is acquired, all array elements are acquired and echo information with a more comprehensive composite component interface bonding state can be obtained.

Description

technical field [0001] The invention belongs to the technical field of defect detection, and in particular relates to a rapid imaging quantitative detection method of composite member interfaces based on full matrix data. Background technique [0002] Composite bonding components are widely used in national defense and aerospace industries, such as the bonding of propellant grains and cladding layers in solid rocket motors, the bonding of thermal insulation layers and shells, heterogeneous interfaces between composite materials and multiple materials, and multi-material bonding. Bonding in crystals, etc. Due to the difference in performance of the materials on both sides of the bonding interface, the stress at the interface and the presence of external interference factors during the construction process, it will cause debonding defects during the manufacture and use of the composite bonded components, which will have a negative impact on the safety of the components. There...

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Problems solved by technology

[0004] At present, the problems existing in the ultrasonic phased array detection system when realizing the detection of disbonding defects are that, on the one hand, commonly used imaging methods include A-scan, B-scan, C-scan, and S-scan. There is a problem that the image contrast between the debonding defect and the good adhesion is low, and the detection accuracy is not high

The detection of debonding defects at the interface of composite components is the bonding of two different materials. When there is a debonding defect at the interface, the emitted ultrasonic wave is almost completely reflected when encountering the debonding defect; and when the interface is very sticky, When the ultrasonic wave encounters the interface, part of the ultrasonic wave will be reflected, and the other part of the wave will be transmitted. Therefore, simply using the value of the maximum echo amplitude at the defect site after a 6dB drop as the threshold value to achieve quantitative detection of debonding defects in composite components will affect the detection accuracy.

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