Title :
Noncontact sensing of physical parameters by Q measurement
Author :
Namjoshi, K.V. ; Biringer, P.P.
Author_Institution :
Dept. of Electr. Eng., Toronto Unv., Ont., Canada
Abstract :
Changes in the quality factor, Q, of a solenoid due to nearby nonmagnetic conducting objects are investigated. The influence of distance and supply frequency on the quality factor is calculated. The results are applied to estimate changes in parameters such as temperature and distance. The results show that changes in Q may be satisfactorily used to monitor physical properties of the workpiece, such as distance or temperature, without physical contacts.<>
Keywords :
distance measurement; quality control; solenoids; temperature measurement; noncontact sensing; nonmagnetic conducting objects; physical parameters sensing; quality factor; quality measurement; solenoid; supply frequency; Conductivity; Conductors; Frequency; Maxwell equations; Q factor; Q measurement; Skin; Solenoids; Temperature measurement; Temperature sensors;
Conference_Titel :
Industry Applications Society Annual Meeting, 1990., Conference Record of the 1990 IEEE
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-87942-553-9
DOI :
10.1109/IAS.1990.152386
