Non-contact torque sensors based on SAW resonators

Author

Beckley, J. ; Kalinin, V. ; Lee, M. ; Voliansky, K.

Author_Institution

Transense Technol. plc, Bicester, UK

fYear

2002

fDate

2002

Firstpage

202

Lastpage

213

Abstract

A detailed model of an interrogation system performing a continuous tracking of the resonant frequencies of the two SAW resonators is developed and the results of computer simulations are presented. A relationship is established between the amount of noise in the system, the Q-factor of the resonators, parameters of the frequency tracking system and the system bandwidth and the resolution. A variation of the SAW torque transducer sensitivity with temperature is discussed. A theoretical model describing this variation is presented and SAW sensors with a reduced sensitivity variation are suggested and experimentally tested.

Keywords

Q-factor; sensitivity; surface acoustic wave resonators; surface acoustic wave transducers; torquemeters; Q-factor; SAW resonators; continuous tracking; frequency tracking system; interrogation system; noncontact torque sensors; resolution; resonant frequencies; sensitivity variation; system bandwidth; torque transducer sensitivity; Bandwidth; Computer simulation; Q factor; Resonant frequency; Sensor phenomena and characterization; Surface acoustic waves; Temperature sensors; Testing; Torque; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control Symposium and PDA Exhibition, 2002. IEEE International

Print_ISBN

0-7803-7082-1

Type

conf

DOI

10.1109/FREQ.2002.1075878

Filename

1075878