陕西师范大学学报（自然科学版）2026，Vol.54Issue(2)：63-73,11.DOI:10.15983/j.cnki.jsnu.2026207
基于滑动相关分析的混频非线性分量提取方法及其应用
A method for extracting mixing nonlinear components based on sliding correlation analysis and its applications
摘要
Abstract
To address the challenge of extracting weak nonlinear effects,a method for extracting mixed nonlinear components is proposed based on sliding correlation analysis.Finite element simulations are conducted to investigate the influence of time window width on the extraction results of mixed components.A sine signal modulated with a Hann window is selected as the reference signal,and when the time window width matches the excitation signal length,the extraction of mixed nonlinear components achieves the best results.Mixed nonlinear detection experiments are carried out on specimens with different bonding strengths,and the mixed components are extracted using three different methods.The results indicate that,compared with the three-excitation difference and polarity reversal methods,the sliding correlation analysis method simplifies the nonlinear detection process,allowing accurate extraction of the nonlinear mixed-frequency components using only a single detection signal.The normalized nonlinear coefficient obtained can effectively characterize the bond strength of the adhesive structure.关键词
非线性超声/混频/弱信号提取/滑动相关分析/粘接强度Key words
nonlinear ultrasound/frequency mixing/weak signal extraction/sliding correlation analysis/adhesive strength分类
通用工业技术引用本文复制引用
郑相锋,张硕,郝晓军,焦敬品,孟蔚然,董月红..基于滑动相关分析的混频非线性分量提取方法及其应用[J].陕西师范大学学报（自然科学版）,2026,54(2):63-73,11.基金项目
国家能源集团科技创新项目资助(GJNY-24-113) （GJNY-24-113）
