Unified approach to analyse mass sensitivities of acoustic gravimetric sensors

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Unified approach to analyse mass sensitivities of acoustic gravimetric sensors

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© The Institution of Electrical Engineers
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A unified approach based on Rayleigh's hypothesis for evaluating the mass sensitivities, Sm, of bulk, surface, plate and thin rod flexural acoustic gravimetric sensors is presented. The estimation of Sm uses the ‘equivalent depth’ which is determined by the displacement distribution of the acoustic mode. The Sm's for the lowest order torsional and longitudinal mode of a thin rod are reported for the first time.

Inspec keywords: mass measurement; surface acoustic wave devices; gravimeters; acoustic transducers

Other keywords: Rayleigh's hypothesis; plate gravimetric sensor; mass sensitivities; thin rod flexural acoustic gravimetric sensors; bulk gravimetric sensor; displacement distribution; surface gravimetric sensor; acoustic gravimetric sensors; longitudinal mode; equivalent depth; torsional mode; oscillator mode

Subjects: Acoustical measurements and instrumentation; Transduction; devices for the generation and reproduction of sound; Geophysical techniques and equipment; Mass and density measurement; Sensing and detecting devices; Mass and density measurement; Acoustic wave devices; Instrumentation and techniques for geophysical, hydrospheric and lower atmosphere research; Sensing devices and transducers; Sonic and ultrasonic transducers and sensors

References

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      • White, R.M.: `Surface acoustic wave sensors', IEEE Catalog No. 85CH22O9-5, Proc. IEEE Ultrasonics Symp., 1985, p. 490–494.
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      • S.W. Wenzel , R.M. White . Analytic comparison of the sensitivities of bulk-wave surface-wave, and flexural plate-wave ultrasonic gravimetric sensors. Appl. Phys. Lett. , 1976 - 1978
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