Title :
Loss estimation and sensing property enhancement for eddy-current-type proximity sensor
Author :
Koibuchi, Koichi ; Sawa, Koichiro ; Honma, Takashi ; Hayashi, Takumi ; Ueda, Kuniyoshi ; Sasaki, Hiroshi
Author_Institution :
Dept. of Syst. Design Eng., Keio Univ., Yokohama
fDate :
4/1/2006 12:00:00 AM
Abstract :
Eddy-current-type proximity sensor is a noncontact-type sensing device to detect the approach of a conductor by an increase of coil resistance due to eddy current loss. This paper investigates electromagnetic (EM) characteristics of the actual proximity sensor by the finite-element method and provides knowledge to enhance sensing property. In particular, the influence of eddy current loss to sensing property is shown and quantitatively estimated. Furthermore, modified models of the actual sensor are proposed and calculated as numerical experiments. As a result, enhanced sensing properties of the proposed models are shown
Keywords :
eddy currents; electric current measurement; electric sensing devices; finite element analysis; coil quality factor; eddy current loss; finite-element method; loss estimation; noncontact-type sensing device; proximity sensor; sensing property enhancement; Coils; Conducting materials; Conductors; Eddy currents; Equations; Finite element methods; Magnetic sensors; Q factor; Sensor phenomena and characterization; Sensor systems; Coil quality factor; eddy current loss; proximity sensor;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.871421
