Download Acoustic Wave Sensors: Theory, Design, & Physico-Chemical by D. S. Ballantine Jr., Robert M. White, S. J. Martin, PDF

By D. S. Ballantine Jr., Robert M. White, S. J. Martin, Antonio J. Ricco, E. T. Zellers, G. C. Frye, H. Wohltjen, Moises Levy, Richard Stern

Written by way of an interdisciplinary crew of specialists from either and academia, Acoustic Wave Sensors offers an in-depth examine the present kingdom of acoustic wave units and the scope in their use in chemical, biochemical, and actual measurements, in addition to in engineering functions. as a result of inherent interdisciplinary functions of those units, this booklet may be helpful for the chemist and biochemist attracted to the use and improvement ofthese sensors for particular functions; engineer taken with the layout and development of those units; the chemical engineer and the biotechnologist attracted to utilizing those units for strategy tracking and regulate; and the sensor group at huge. Key gains* presents in-depth comparability and analyses of alternative different types of acoustic wave units* Discusses working ideas and layout concerns* contains desk of suitable fabric constants for fast reference* provides an intensive overview of present makes use of of those units for chemical, biochemical, and actual measurements, and engineering functions

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Extra info for Acoustic Wave Sensors: Theory, Design, & Physico-Chemical Applications (Applications of Modern Acoustics) (Applications of Modern Acoustics)

Example text

This leads to an electric field described by E = ik~exSu3x. 7. 2 ENERGY DENSITY AND POWER FLOW Because passage of an elastic wave causes time-harmonic deformation of a crystal, each unit volume through which the wave passes has time-varying potential (strain) energy and kinetic energy. 7 Electric field propagating along with mechanical wave in ZnO. potential energy is maximum when strain, or deformation, of the crystal at that point is maximum and the local particle velocity is zero; after one-quarter wave period has elapsed, local deformation of the crystal reaches zero and velocity (hence kinetic energy) reaches its maximum absolute value.

Thus, there is an interchange of kinetic and strain energies, much as in a mass-spring oscillator. 39) i=1 In this equation, the squares of the particle velocities are summed over the three directions (the subscript being repeated by squaring the quantity). 40) 30 2. Fundamentals of Acoustic Waves where c' denotes the piezoelectrically stiffened elastic constants in piezoelectric materials. The similarity between this equation and the expression for the energy stored in a compressed spring, Us = -~kx 2, is apparent.

Thus, there is an interchange of kinetic and strain energies, much as in a mass-spring oscillator. 39) i=1 In this equation, the squares of the particle velocities are summed over the three directions (the subscript being repeated by squaring the quantity). 40) 30 2. Fundamentals of Acoustic Waves where c' denotes the piezoelectrically stiffened elastic constants in piezoelectric materials. The similarity between this equation and the expression for the energy stored in a compressed spring, Us = -~kx 2, is apparent.

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