Title :
A New Differential Excitation Eddy Current Sensor Used for Micro-defects on Metal Surface
Author :
Qin Feng;Zhang Weimin;Chen Guolong;Gao Xuanyi
Author_Institution :
Sch. of Mech. Eng., Beijing Inst. of Technol., Beijing, China
Abstract :
The paper analyses traditional differential eddy current sensors pointing out that differential excitation eddy current is more suitable for micro-defects detection. Based on this theory, a new kind of eddy current sensor with orthogonal rotating excitation field is proposed. The simulation analysis indicates that this new sensor can generate rotating eddy excitation field. The structure of this new sensor and the signal processing circuit is given in this paper. The correctness and effectiveness of the sensor has been proved through experimental results.
Keywords :
"Eddy currents","Coils","Sensitivity","Nondestructive testing","Current measurement","Metals","Integrated circuit modeling"
Conference_Titel :
Intelligent Systems Design and Engineering Applications (ISDEA), 2015 Sixth International Conference on
DOI :
10.1109/ISDEA.2015.19
