A laser shock wave composite material bonding force detection device and method based on sensor unit array

By using laser shock wave detection technology based on sensor unit array in composite material detection, the laser shock wave signal is analyzed using damage index curves to solve the problem of defect identification in composite material, and the accurate detection and defect identification of binding force are achieved.

CN110361323BActive Publication Date: 2025-03-18XIAN AEROSPACE MECHATRONICS & INTELLIGENT MANUFACTURING CO LTD
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Patent Information

Application Number
CN201910693540.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2019-07-30
Publication Date
2025-03-18
Estimated Expiration
2039-07-30

AI Technical Summary

Technical Problem

The prior art is difficult to effectively identify the defects of "kiss" binding and weak binding in composite materials, resulting in expansion during service, affecting service life and even leading to structural damage.

Method used

A laser shock wave detection device based on a sensor unit array is adopted to generate laser shock waves through a laser, the sensor array records and analyzes the shock wave signal, and uses the damage index curve to judge the bonding force of the composite material.

Benefits of technology

It realizes accurate detection of the binding force of composite materials, and can identify the defects of "kiss" binding and weak binding, improves the comprehensiveness and accuracy of the detection, and extends the service life of composite materials.

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Abstract

The present invention provides a laser shock wave composite material bonding force detection device and method based on a sensor unit array, including a bonding force detection system and a signal acquisition system connected by a wire, using an excitation source (laser) and multiple receiving sources (sensor array), the sensor uses the laser source as the center of the circle to form a circular array, and the array distribution direction corresponds to the composite material ply direction, so as to realize a laser excitation at one time, and the array sensor simultaneously receives multiple shock wave response signals, extracts the "stripping" characteristic information in the array sensor unit receiving signal, obtains the circumferential distribution of the "stripping" characteristic in the laser shock area, and realizes the redefinition of the composite material bonding force index by defining the damage index and the square error. The present invention effectively solves the problem of laser shock wave composite material bonding force detection, and realizes a more comprehensive and accurate evaluation of the bonding force index through one-time excitation, circumferential multi-point reception, and multi-directional data fusion method.
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