文献类型：期刊文献

英文题名：A Quasi-Baseline-Free Guided Wave Testing Approach via Electromechanical Impedance Compensation

作者：Li, Mingyuan[1];Hu, Zheng[1,2];Xu, Haiming[3];Qiu, Xunlin[1];Xiang, Yanxun[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai Key Lab Intelligent Sensing & Detect, Shanghai 200237, Peoples R China;[2]Nanjing Univ, Key Lab Modern Acoust, MOE, Nanjing 210093, Peoples R China;[3]China Univ Min & Technol, State Key Lab Coal Mine Disaster Prevent & Control, Xuzhou 221116, Peoples R China

年份：2026

卷号：26

期号：15

起止页码：22193

外文期刊名：IEEE SENSORS JOURNAL

收录：;EI(收录号：20262621007080);WOS:【SCI-EXPANDED(收录号:WOS:001837826600047)】；

基金：This work was supported in part by the National Natural Science Foundation of China under Grant 12304511 and Grant 12474467; in part by the Fundamental Research Funds for the Central Universities under Grant 020414380244; and in part by the Open Fund of State Key Laboratory of Coal Mine Disaster Prevention and Control, China University of Mining and Technology under Grant SKLCMDPC2025ZZ03.

语种：英文

外文关键词：Modeling; Electromagnetic interference; Image sensors; Waves; Educational institutions; Wireless Access in Vehicular Environments; Indexes; Indexing; Lead zirconate titanate; Impedance; Damage identification; electromechanical impedance (EMI); guided wave testing (GWT); quasi-baseline-free

摘要：Without prior information from an undamaged state, signal deviations caused by variations in sensors and bonding layer properties can be misinterpreted as damage in guided wave testing (GWT). This article presents a quasi-baseline-free methodology that compensates such systematic deviations, by using the electromechanical impedance (EMI) spectra of the sender and receiver units, leveraging the significant parameter overlap between these two processes. Support vector regression (SVR) is employed to construct this functional relationship, using the standard EMI evaluation indices from the pitch-catch sensors as inputs and their corresponding GWT signal amplitude from an undamaged propagation path as the output. Once this relationship is established, the ideal GWT signal amplitude from an undamaged state can be predicted based on the sensors' EMI curves, and then serves as the reference for damage identification and quantification. The proposed concept is validated through both simulations and practical experiments, where its calculated damage index shows a monotonic increase with the size of circular through holes in aluminum alloy plates, achieving performance comparable to the baseline-dependent amplitude comparison method as well as a more consistent trend than the standard baseline-free time reversal method.