资料介绍
摘要：数字相敏检波作为一种微弱信号的检测方法，适用于信号微弱及信噪比低的远场涡流检测,介绍了运用远场涡流技术检测管道缺陷的原理和方法，并对数字相敏检波器进行了研究和研制，实验结果表明效果良好。
关键词：远场涡流；微弱信号检测；数字相敏检波
中图分类号：TP216+.1
文献标识码：A
Abstract:As a new method to detect weak signal, digital phase signal detecting is suitable for remote field eddy current detecting, in this caes the signal is very weak and the signal to noise is very small.The measuring theory and method of the remote field eddy current detecting is introduced,and the digital phase Signal detecting in remote field eddy current detecting is researched.The test result shows that this method is effective and feasible.
Key words: remote field eddy current;weak signal detect;digital phase signal detecting
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