Title :
Simple eddy current sensor for small angle measurement
Author :
Li, S. ; He, Q. ; Zhang, Z. ; Han, B. ; Li, Z. ; Lan, J.
Author_Institution :
Dept. of Electr. Eng., Tsinghua Univ., Beijing, China
Abstract :
A simple differential eddy current sensor for measuring small rotation angle is presented and experimentally investigated. The output signal is obtained from changing active areas of a rotatable copper plate with two legs inserted into gaps of a magnetic circuit. Test results show this kind of sensor has a resolution of 8μrad over the effective measurement range of ±7000μrad.
Keywords :
angular measurement; eddy currents; electric sensing devices; magnetic circuits; active areas; differential eddy current sensor; magnetic circuit gaps; rotatable copper plate; rotation angle measurement; Copper; Current measurement; Eddy currents; Magnetic circuits; Magnetic cores; Optical variables measurement; Windings; Small angle measurement; eddy current sensor; mutual inductance;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM), 2012 Conference on
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4673-0439-9
DOI :
10.1109/CPEM.2012.6251020
