Title :
Non-contact torque sensors based on SAW resonators
Author :
Beckley, J. ; Kalinin, V. ; Lee, M. ; Voliansky, K.
Author_Institution :
Transense Technol. plc, Bicester, UK
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;
Conference_Titel :
Frequency Control Symposium and PDA Exhibition, 2002. IEEE International
Print_ISBN :
0-7803-7082-1
DOI :
10.1109/FREQ.2002.1075878
