| 谱分析型多频涡流检测的信号处理方法研究 |
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| 引用本文： | 高军哲,潘孟春,罗飞路,陈棣湘.谱分析型多频涡流检测的信号处理方法研究[J].电子测量与仪器学报,2011,25(1):16-22. |
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| 作者姓名： | 高军哲 潘孟春 罗飞路 陈棣湘 |
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| 作者单位： | 国防科学技术大学机电工程与自动化学院; |
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| 基金项目： | 国家“十一五”预研(编号:51317030106)资助项目 |
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| 摘 要： | 多频涡流检测是有效实现多参数检测和干扰抑制的无损检测方法.在谱分析型多频涡流检测中,采用同步方式合成多频激励信号,将涡流检测信号进行放大后,采集进行DFT变换,在频域进行特征提取分析.基于遗传算法,对多频激励信号的初始相位进行优化,降低激励信号的峰值因数,减小驱动电路工作电压范围.对检测信号进行谱分析,通过谱能量的变化...
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| 关 键 词： | 多频涡流检测 谱分析方法 峰值因数优化 缺陷识别 缺陷分类 |
Research on signal processing method of multi-frequency eddy current testing based on spectrum analysis |
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| Gao Junzhe,Pan Mengchun,Luo Feilu,Chen Dixiang.Research on signal processing method of multi-frequency eddy current testing based on spectrum analysis[J].Journal of Electronic Measurement and Instrument,2011,25(1):16-22. |
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| Authors: | Gao Junzhe Pan Mengchun Luo Feilu Chen Dixiang |
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| Affiliation: | Gao Junzhe Pan Mengchun Luo Feilu Chen Dixiang (College of Mechatronics and Automation,National University of Defense Technology,Changsha 410073,China) |
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| Abstract: | Multi-frequency eddy current testing(MFECT) is an effective NDT method for multi-parametric detection and interferer elimination.In multi-frequency eddy current testing based on spectrum analysis,its multi-frequency exciting signal was synthesized synchronously.The eddy current testing signal was amplified and sampled,then it was converted to frequency domain by discrete Fourier transform(DFT) and spectrum features could be extracted and analyzed.The initial phase of each frequency component in the exciting... |
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| Keywords: | multi-frequency eddy current testing spectrum analysis method crest factor optimization defect identification defect classification |
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