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Informationen zum Autor Kentaro Nakamura is a Professor in the Tokyo Institute of Technology’s Precision and Intelligence Laboratory, Japan. He has published extensively on a variety of aspects of ultrasonic devices and equipment as well as measurement engineering. Klappentext 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. Zusammenfassung Ultrasonic transducers reviews recent research in the design and application of this important technology. Inhaltsverzeichnis Part 1 Materials and design of ultrasonic transducers: Piezoelectricity and basic configurations for piezoelectric ultrasonic transducers; Electromagnetic acoustic transducers (EMATs); Piezoelectric ceramics for ultrasonic transducers; Thin film ultrasonic transducers based on lead zirconate titanate (PZT); Piezoelectric single crystals in ultrasonic transducers. Part 2 Modelling and characterisation of ultrasonic transducers: Modelling ultrasonic transducer performance: One-dimensional models; Modelling the performance of micro-acoustic devices using the boundary element method; Electrical evaluation of piezoelectric transducers; Laser Doppler vibrometry for measuring vibration of ultrasonic transducers; Optical visualization of acoustic fields: 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; Air-borne ultrasound transducers; Ultrasonic transducers for non-destructive evaluation at high temperatures; Analysis and synthesis of frequency-diverse ultrasonic flaw detection systems using Order Statistics and Neural Network Processors; Power ultrasonics: New technologies and applications for fluid processing; Nonlinear acoustics and selected applications in biomedical ultrasonics; Therapeutic ultrasound with an emphasis on applications to the brain; Micro scale ultrasonic sensors and actuators; Piezoelectric and fiber optic hydrophones; Ultrasonic motors. ...
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Woodhead Publishing Series in Electronic and Optical Materials
Preface
Part I: Materials and design of ultrasonic transducers
Chapter 1: Piezoelectricity and basic configurations for piezoelectric ultrasonic transducers
Abstract:
1.1 Introduction
1.2 The piezoelectric effect
1.3 Piezoelectric materials
1.4 Piezoelectric transducers
1.5 Summary, future trends and sources of further information
Chapter 2: Electromagnetic acoustic transducers
Abstract:
2.1 Introduction
2.2 Physical principles
2.3 Lorentz-force-type transducers
2.4 Magnetostriction-type transducers
2.5 Conclusion
Chapter 3: Piezoelectric ceramics for transducers
Abstract:
3.1 The history of piezoelectrics
3.2 Piezoelectric materials: present status
Chapter 4: Thin-film PZT-based transducers
Abstract:
4.1 Introduction
4.2 PZT deposition using the hydrothermal process
4.3 Applications using the bending and longitudinal vibration of the d31 effect
4.4 Thickness-mode vibration, d33
4.5 Epitaxial film
4.6 Conclusions
Chapter 5: High-Curie-temperature piezoelectric single crystals of the Pb(In1/2Nb1/2)O3â?"Pb(Mg1/3Nb2/3)O3â?"PbTiO3 ternary system
Abstract:
5.1 Introduction
5.2 PIMNT ceramics
5.3 PIMNT single crystals grown by the flux method
5.4 PIMNT single crystals grown by the Bridgman method
5.5 Recent research into PIMNT single crystals and their applications
5.6 Future prospects and tasks
5.7 Conclusions
Part II: Modelling and characterisation of ultrasonic transducers
Chapter 6: Modelling ultrasonic-transducer performance: one-dimensional models
Abstract:
6.1 Introduction
6.2 Transducer performance expressed through the wave equation
6.3 Equivalent electrical circuit models
6.4 The linear systems model
6.5 Examples
6.6 Summary, future trends and sources of further information
Chapter 7: The boundary-element method applied to microacoustic devices: zooming into the near field
Abstract:
7.1 Introduction
7.2 The acoustic wave equation: shear horizontal vibrations
7.3 Construction of infinite-domain Green's functions
7.4 Near-field analysis
7.5 Normalization of the field variables
7.6 Determining the asymptotic expansion terms for Æz ? 0
7.7 Future trends
7.8 Key references for further reading
7.9 Acknowledgements
Chapter 8: Electrical evaluation of piezoelectric transducers
Abstract:
8.1 Introduction
8.2 Equivalent electrical circuit
8.3 Electrical measurements
8.4 Characterization of piezoelectric transducers under high-power operation
8.5 Load test
8.6 Summary
Chapter 9: Laser Doppler vibrometry for measuring vibration in ultrasonic transducers
Abstract:
9.1 Introduction
9.2 Laser Doppler vibrometry for non-contact vibration measurements
9.3 Characterization of ultrasonic transducers and optimization of ultrasonic tools
9.4 Enhanced LDV designs for special measurements
9.5 Conclusion and summary
Chapter 10: Optical visualization of acoustic fields: the schlieren technique, the Fresnel method and the photoelastic method applied to ultrasonic transducers
Abstract:
10.1 Introduction
10.2 Schlieren visualization technique
10.3 Fresnel visualization method
10.4 Photoelastic visualization method
Part III: Applications of ultrasonic transducers
Chapter 11: Surface acoustic wave (SAW) devices
Abstract:
11.1 Introduction
11.2 Interdigital transducers (IDTs)
11.3 Transversal SAW filter
11.4 SAW resonators
11.5 Conclusions
Chapter 12: Airbo
