Specific cylindrical metal's distinction in particular environment
Yanjie Wang, Qing Li, Xiong Li · International Conference on Instrumentation, Measurement, Circuits and Systems · 2009
To solve the problem about specific cylindrical metal's distinction in particular environment, in this paper we have designed a new eddy current sensor. And, the orthogonal vector LIA( Lock- in Amplifier) was applied to realize getting useful signals of the new sensor. After the calculation of DSP, we can get the planar information about phase and amplitude of the getting useful signal. The small differences of the copper cylinder can be easily distinguished.