传感技术学报2017，Vol.30Issue(2)：242-246,5.DOI:10.3969/j.issn.1004-1699.2017.02.013
希尔伯特黄变换在调制超声激励-光纤光栅传感损伤检测中的应用
Application of Hilbert-Huang Transformation in Defect Detection UsingVibro-Ultrasonic Modulation Excitation-Fiber Bragg Grating Sensing
摘要
Abstract
It is widely recognized that nonlinear ultrasonic method has more advantages than linear ultrasonic technology in micro defect detection.Vibro-ultrasonic modulation(VUM)method was adopted,and Fiber Bragg Grating (FBG)was used to sense nonlinear signal instead of piezoelectric patches because it is very easy for FBG to realize distributed measurement.The sensing characteristic of FBG for ultrasonic was studied and a VUM excitation-FBG sensing system for Aluminum thin plate was built.The Hilbert Huang transformation(HHT)was applied in the analysis of nonlinear signal,and it was proved that the nonlinear response was not only amplitude modulation(AM)signal but also frequency modulation(FM),so the influence of defect on amplitude and frequency should be considered in the further research.关键词
非线性超声/调制超声激励/光纤光栅/希尔伯特黄变换Key words
nonlinear ultrasonic/vibro-ultrasonic modulation/Fiber Bragg grating/HHT分类
通用工业技术引用本文复制引用
黄晓,谭跃刚..希尔伯特黄变换在调制超声激励-光纤光栅传感损伤检测中的应用[J].传感技术学报,2017,30(2):242-246,5.基金项目
国家自然科学基金项目(51375358) （51375358）
