Title :
Effective utilization of acoustic wave sensor responses: simultaneous measurement of velocity and attenuation
Author :
Martin, S.J. ; Ricco, A.J.
Author_Institution :
Sandia Nat. Lab., Albuquerque, NM, USA
Abstract :
When using acoustic wave devices as sensors, responses arise from perturbations in wave-propagation characteristics (velocity and attenuation) caused by wave interactions with a surface layer. Simultaneous measurement of both velocity and attenuation changes helps elucidate the wave-perturbation mechanisms. A number of wave-surface-layer interactions have been investigated involving surface acoustic waves (SAWs) in the gas phase and acoustic plate modes (APMs) in liquids. These include mass loading of a SAW, acoustoelectric interactions between SAWs and a conductive film overlay, mass loading of an APM, and viscous coupling of an APM to an adjacent liquid medium
Keywords :
surface acoustic wave devices; ultrasonic absorption; ultrasonic propagation; ultrasonic transducers; ultrasonic velocity measurement; SAW; acoustic plate modes; acoustic wave sensor responses; acoustoelectric interactions; attenuation measurement; conductive film overlay; gas phase; liquids; mass loading; perturbations; simultaneous measurement; surface acoustic waves; surface layer; velocity measurement; viscous coupling; wave interactions; wave-propagation characteristics; wave-surface-layer interactions; Acoustic measurements; Acoustic sensors; Acoustic waves; Attenuation measurement; Liquids; Sawing machines; Sensor phenomena and characterization; Surface acoustic wave devices; Surface acoustic waves; Velocity measurement;
Conference_Titel :
Ultrasonics Symposium, 1989. Proceedings., IEEE 1989
Conference_Location :
Montreal, Que.
DOI :
10.1109/ULTSYM.1989.67058
