At present based on the current common principles were magnetic ultrasonic flaw detection and based on the principles of service flaw detection in the detection major research direction.
目前常用的基于漏磁原理的裂纹检测和基于超声波原理的裂纹检测是在役管道检测主要的研究方向。
First, the article analyzes the current principle, classification and the technology of Intrusion Detection in common use and predicates the direction of Intrusion Detection development.
首先，本文分析了通用的入侵检测原理、分类及常用的入侵检测技术，指出了入侵检测的发展趋势。
The detection system achieves the online real-time detection of stray current, and the types, magnitude and direction of stray current can be detected.
该检测方法实现杂散电流在线实时检测，不但能检测杂散电流的类别，而且还能检测杂散电流的大小和方向。
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