空军工程大学学报（自然科学版）2011，Vol.12Issue(3)：45-49,5.DOI:10.3969/j.issn.1009-3516.2011.03.010
脉冲涡流无损检测提离效应研究
Study of Lift - Off Effects for Pulsed Eddy Current Nondestructive Testing Technique
摘要
Abstract
In the course of pulsed eddy current testing, the incline of the probe or the roughness of the surface of the tested object will lead to the lift - off effects, which have a bad influence on the result of pulsed eddy current (PEC) nondestructive testing.Based on the analysis of the operating principle of PEC, two different simulation models with the excitation coils of columniform and rectangle structures are established by ANSYS finite element simulation software and the simulations on the specimen of ferromagnetic and non -ferromagnetic materials are done respectively.Through the analysis of the eddy current and rotated magnetic field, the influence effect of response signal with the variation of the lift - off distance and the reason is given.Finally, the results of simulation are verified by experiment methods.The results of the experimental work confirm the correctness of simulation, which will lay the foundation for the elimination of lift - off effects.关键词
脉冲涡流/提离效应/有限元仿真/检测信号Key words
pulsed eddy current/ lift - off effect/ finite element simulation/ detecting signal分类
矿业与冶金引用本文复制引用
曹海霞,王畅,杨宾峰,张军潮,张辉..脉冲涡流无损检测提离效应研究[J].空军工程大学学报（自然科学版）,2011,12(3):45-49,5.基金项目
国家自然科学基金资助项目(50807053) （50807053）
