Internal Hole Defect Detection Based on Laser Ultrasonic Shear Wave

IF 0.9 4区 材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING
Yi Jiang, Minglei Yu, Rongyao Wang, Lei Han
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引用次数: 0

Abstract

This study presents a method for detecting interior hole defects using atime-flight scattered-shear wave (S-wave) methodology. Additionally, a mathematical model is proposed to quantify the detected defects accurately. The proposed method, PSO-VMD, combines variational mode decomposition with a particle swarm optimization algorithm to extract the mode conversion signal of a defect S-wave from a complex laser ultrasonic detection signal. This method effectively enhances the S-wave mode conversion signal’s signal-to-noise ratio (SNR). An experimental system using noncontact laser ultrasonic B-scanning is constructed. The system employs fixed excitation and detection methods. Experimental verification is conducted to accurately detect and identify hole flaws inside steel samples, considering variations in burial depths and diameters. The experimental results show that the proposed techniques for detection and signal processing are capable of accurately identifying and measuring hole defects. The relative positional error, which includes both transverse distance and buried depth, is below 5%, while the relative quantitative error, specifically in terms of diameter, is below 8%.

Abstract Image

基于激光超声剪切波的内部孔缺陷检测
本研究提出了一种利用定时飞行散射剪切波(S 波)方法检测孔内部缺陷的方法。此外,还提出了一个数学模型,用于精确量化检测到的缺陷。所提出的 PSO-VMD 方法将变分模式分解与粒子群优化算法相结合,从复杂的激光超声检测信号中提取缺陷 S 波的模式转换信号。该方法有效提高了 S 波模式转换信号的信噪比(SNR)。利用非接触式激光超声 B 扫描构建了一个实验系统。该系统采用固定的激励和检测方法。考虑到埋深和直径的变化,进行了实验验证,以准确检测和识别钢材样品内部的孔洞缺陷。实验结果表明,所提出的检测和信号处理技术能够准确识别和测量孔洞缺陷。包括横向距离和埋深在内的相对位置误差低于 5%,而相对数量误差(特别是直径方面)低于 8%。
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来源期刊
Russian Journal of Nondestructive Testing
Russian Journal of Nondestructive Testing 工程技术-材料科学:表征与测试
CiteScore
1.60
自引率
44.40%
发文量
59
审稿时长
6-12 weeks
期刊介绍: Russian Journal of Nondestructive Testing, a translation of Defectoskopiya, is a publication of the Russian Academy of Sciences. This publication offers current Russian research on the theory and technology of nondestructive testing of materials and components. It describes laboratory and industrial investigations of devices and instrumentation and provides reviews of new equipment developed for series manufacture. Articles cover all physical methods of nondestructive testing, including magnetic and electrical; ultrasonic; X-ray and Y-ray; capillary; liquid (color luminescence), and radio (for materials of low conductivity).
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