摘要
涡流无损检测的实质就是检测线圈上的阻抗变化，而引起线图阻抗变化的干扰因素很多，如何从噪声中提取感兴趣的信号是涡流信号提取的关键．本文从信号参量估计理论出发，确定出线圈阻抗变化的测量原理、物理实现．
Eddy current testing is to pick up the impedence changes of the coils. But there are many disturbing factors which make impedence change. It is the key to extract the intristing signal from the noises. From the theory of signal parameter estimation, this paper gives the principle and implementation of detecting the impedence changes. At last, an application is introduced.
出处
《湘潭大学自然科学学报》
CAS
CSCD
1997年第2期90-93,共4页
Natural Science Journal of Xiangtan University
基金
国防科工委试验技术研究项目
关键词
涡流
无损检测
信号参量估计
电磁场
噪声
eddy current nondestructive testing, signal parameter estimation
