Synopses & Reviews
Ultrasonic transducers are key components in sensors for distance, flow and level measurement as well as power and other applications of ultrasound. This book reviews recent research in the design and application of this important technology.
Part one provides an overview of materials and design of ultrasonic transducers. It explores piezoelectricity and basic configurations, along with electromagnetic acoustic transducers, and the use of ceramics, thin film and single crystals. Part two investigates modeling and characterization and considers in detail performance modeling, electrical evaluation, laser Doppler vibrometry and optical visualization. Applications of ultrasonic transducers are the focus of part three, beginning with a review of surface acoustic wave devices and air-borne ultrasound transducers and goes on to consider ultrasonic high temperature and flaw detection systems, power, biomedical and micro scale ultrasonics, therapeutic ultrasound devices, piezoelectric and fiber optic hydrophones, and ultrasonic motors.
Ultrasonic transducers are key devices for important applications such as medical treatments, non-destructive testing and precision alignment. This book reviews the materials, design and applications of ultrasonic transducers and focuses on recent developments and issues. Part one provides an introduction to the materials and design of ultrasonic transducers. Part two covers modelling and characterization of ultrasonic transducer performance. Part three reviews materials and design while part four contains chapters on applications of ultrasonic transducers in devices and systems, including SAW devices, sensors and actuators and therapeutic ultrasound.
About the Author
Kentaro Nakamura is Associate Professor at Toyko Institute of Technology, Japan. He is also in charge of directing research at the Ueha-Nakamura Laboratory, where his research group is working to formulate a technique or device for high speed visualization of acoustic fields.
Table of Contents
Part 1 Materials and design of ultrasonic transducers
: Piezoelectricity and basic con?gurations for piezoelectric ultrasonic transducers; Electromagnetic acoustic transducers; Piezoelectric ceramics for transducers; Thin-?lm PZT-based transducers; High-Curie-temperature piezoelectric single crystals of the Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 ternary system
Part 2 Modelling and characterisation of ultrasonic transducers: Modelling ultrasonic-transducer performance: One-dimensional models; The boundary-element method applied to micro-acoustic devices: Zooming into the near ?eld; Electrical evaluation of piezoelectric transducers; Laser Doppler vibrometry for measuring vibration in ultrasonic transducers; Optical visualization of acoustic ?elds: The schlieren technique, the Fresnel method and the photoelastic method applied to ultrasonic transducers
Part 3 Applications of ultrasonic transducers: Surface acoustic wave (SAW) devices; Airborne ultrasound transducers; Transducers for non-destructive evaluation at high temperatures; Analysis and synthesis of frequency-diverse ultrasonic ?aw-detection systems using order statistics and neural network processors; Power ultrasonics: New technologies and applications for ?uid processing; Nonlinear acoustics and its application to biomedical ultrasonics; Therapeutic ultrasound with an emphasis on applications to the brain; Microscale ultrasonic sensors and actuators; Piezoelectric and ?bre-optic hydrophones; Ultrasonic motors