Generalized concept of shear horizontal acoustic plate mode and Love wave sensors

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McHale, G., 2003. Generalized concept of shear horizontal acoustic plate mode and Love wave sensors. Measurement Science and Technology, 14 (11), pp. 1847-1853. ISSN 0957-0233

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Official URL: http://dx.doi.org/10.1088/0957-0233/14/11/001

Abstract

An approach to mass and liquid sensitivity for both the phase velocity and insertion loss of shear mode acoustic wave sensors based on the dispersion equations for layered systems is outlined. The approach is sufficiently general to allow for viscoelastic guiding layers. An equation for the phase velocity and insertion loss sensitivities is given which depends on the slope of the complex phase velocity dispersion curves. This equation contains the equivalent of the Sauerbrey and Kanazawa equations for loading of a quartz crystal microbalance by rigid mass and Newtonian liquids, respectively, and also describes surface loading by viscoelastic layers. The theoretical approach can be applied to a four-layer system, with any of the four layers being viscoelastic, so that mass deposition from a liquid can also be modelled. The theoretical dispersion equation based approach to layer-guided shear horizontal acoustic wave modes on finite substrates presented in this work provides a unified view of Love wave and shear horizontal acoustic plate mode (SH-APM) devices, which have been generally regarded as distinct in sensor research.

Item Type:

Journal article

Alternative Title:

Generalized concept of SH-APM and Love wave sensors [working title]

Publication Title:

Measurement Science and Technology

Creators:

McHale, G.

Publisher:

IOP Publishing

Place of Publication:

Bristol