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Frequency Steerable Acoustic Transducers
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Book Synopsis Frequency Steerable Acoustic Transducers by : Matteo Senesi
Download or read book Frequency Steerable Acoustic Transducers written by Matteo Senesi and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural health monitoring (SHM) is an active research area devoted to the assessment of the structural integrity of critical components of aerospace, civil and mechanical systems. Guided wave methods have been proposed for SHM of plate-like structures using permanently attached piezoelectric transducers, which generate and sense waves to evaluate the presence of damage. Effective interrogation of structural health is often facilitated by sensors and actuators with the ability to perform directional scanning. In this research, the novel class of Frequency Steerable Acoustic Transducers (FSATs) is proposed for directional generation/sensing of guided waves. The FSATs are characterized by a spatial arrangement of the piezoelectric material which leads to frequency-dependent directionality. The resulting FSATs can be employed both for directional sensing and generation of guided waves, without relying on phasing and control of a large number of channels. Because there is no need for individual control of transducer elements, hardware and power requirements are drastically reduced so that cost and hardware limitations of traditional phased arrays can be partially overcome. The FSATs can be also good candidates for remote sensing and actuation applications, due to their hardware simplicity and robustness. Validation of the proposed concepts first employs numerical methods. Next, the prototyping of the FSATs allows an experimental investigation confirming the analytical and numerical predictions. Imaging algorithm based on frequency warping is also proposed to enhance results representation.
Book Synopsis Characterization and Design of Spiral Frequency Steerable Acoustic Transducers by : Rohan Repale
Download or read book Characterization and Design of Spiral Frequency Steerable Acoustic Transducers written by Rohan Repale and published by . This book was released on 2014 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural Health Monitoring (SHM) is an emerging research area devoted to improving the safety and maintainability of civil structures. Guided wave structural testing method is an effective approach used for SHM of plate-like structures using piezoelectric transducers. These transducers are attached to the surface of the structure and are capable of sensing its health by using surface waves. Transducers with beam steering i.e. electronic scanning capabilities can perform surface interrogation with higher precision and ease. A frequency steerable acoustic transducer (FSAT) is capable of beam steering and directional surface wave sensing to detect and localize damage in structures. The objective of this research is to further explore the possibilities of FSAT technology by designing and testing new FSAT designs. The beam steering capability of FSAT can be controlled by manipulating its design parameters. These design parameters therefore play a significant role in FSAT's performance. Studying the design parameters and documenting the performance improvements based on parameter variation is the primary goal of this research. Design and characterization of spiral FSAT was performed and results were simulated. Array FSAT documented results were validated. Modified designs were modeled based on design parameter variations. Characterization of these designs was done and their performance was recorded. Plate simulation results confirm direct relationship between design parameters and beam steering. A set of guidelines for future designs was also proposed. Two designs developed based on the set guidelines were sent to our collaborator Genziko Inc. for fabrication.
Book Synopsis Acoustic Transducers by : Ivor D. Groves
Download or read book Acoustic Transducers written by Ivor D. Groves and published by . This book was released on 1981 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Piezo-Electric Electro-Acoustic Transducers by : Valeriy Sharapov
Download or read book Piezo-Electric Electro-Acoustic Transducers written by Valeriy Sharapov and published by Springer Science & Business Media. This book was released on 2013-11-08 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electroacoustic transducers (EAT) are devices, which transform electric energy to energy of acoustic fluctuations. Principles of action, design of transducers for work in air and water as well as for non-destructive control are described in the book. New technologies of designing EAT, not only expanding designing possibilities, are described. They also allow to create transducers with improved characteristics. In particular, methods to increase target capacity (sound pressure), decrease working (resonant) frequency of transducers and expand frequencies of projectors and sound receivers are developed. Methods and control units of transducers in batch production of transducers are described, too.
Book Synopsis Frequency Response and Directivities of Selected Acoustic Transducers by : Jeff S. Hsu
Download or read book Frequency Response and Directivities of Selected Acoustic Transducers written by Jeff S. Hsu and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transducers and Arrays for Underwater Sound by : John L. Butler
Download or read book Transducers and Arrays for Underwater Sound written by John L. Butler and published by Springer. This book was released on 2016-09-01 with total page 735 pages. Available in PDF, EPUB and Kindle. Book excerpt: This improved and updated second edition covers the theory, development, and design of electro-acoustic transducers for underwater applications. This highly regarded text discusses the basics of piezoelectric and magnetostrictive transducers that are currently being used as well as promising new designs. It presents the basic acoustics as well as the specific acoustics data needed in transducer design and evaluation. A broad range of designs of projectors and hydrophones are described in detail along with methods of modeling, evaluation, and measurement. Analysis of projector and hydrophone transducer arrays, including the effects of mutual radiation impedance and numerical models for elements and arrays, are also covered. The book includes new advances in transducer design and transducer materials and has been completely reorganized to be suitable for use as a textbook, as well as a reference or handbook. The new edition contains corrections to the first edition, end-of-chapter exercises, and solutions to selected exercises. Each chapter includes a short introduction, end-of-chapter summary, and an extensive reference list offering the reader more detailed information and historical context. A glossary of key terms is also included at the end.
Book Synopsis Electromagnetic Acoustic Transducers by : Masahiko Hirao
Download or read book Electromagnetic Acoustic Transducers written by Masahiko Hirao and published by Springer. This book was released on 2016-10-25 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second edition provides comprehensive information on electromagnetic acoustic transducers (EMATs), from the theory and physical principles of EMATs to the construction of systems and their applications to scientific and industrial ultrasonic measurements on materials. The original version has been complemented with selected ideas on ultrasonic measurement that have emerged since the first edition was released. The book is divided into four parts: PART I offers a self-contained description of the basic elements of coupling mechanisms along with the practical designing of EMATs for various purposes. Several implementations to compensate for EMATs’ low transfer efficiency are provided, along with useful tips on how to make an EMAT. PART II describes the principle of electromagnetic acoustic resonance (EMAR), which makes the most of EMATs’ contactless nature and is the most successful amplification mechanism for precise measurements of velocity and attenuation. PART III applies EMAR to studying physical acoustics. New measurements have emerged with regard to four major subjects: in situ monitoring of dislocation behavior, determination of anisotropic elastic constants, pointwise elasticity mapping (RUM), and acoustic nonlinearity evolution. PART IV deals with a variety of individual issues encountered in industrial applications, for which the EMATs are believed to be the best solutions. This is proven by a number of field applications.
Book Synopsis Ultrasonic Transducers by : K Nakamura
Download or read book Ultrasonic Transducers written by K Nakamura and published by Elsevier. This book was released on 2012-08-23 with total page 749 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrasonic transducers are key components in sensors for distance, flow and level measurement as well as in power, biomedical and other applications of ultrasound. Ultrasonic transducers reviews recent research in the design and application of this important technology.Part one provides an overview of materials and design of ultrasonic transducers. Piezoelectricity and basic configurations are explored in depth, along with electromagnetic acoustic transducers, and the use of ceramics, thin film and single crystals in ultrasonic transducers. Part two goes on to investigate modelling and characterisation, with performance modelling, electrical evaluation, laser Doppler vibrometry and optical visualisation all considered in detail. 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 going on to consider ultrasonic transducers for use at high temperature and in flaw detection systems, power, biomedical and micro-scale ultrasonics, therapeutic ultrasound devices, piezoelectric and fibre optic hydrophones, and ultrasonic motors are also described.With its distinguished editor and expert team of international contributors,Ultrasonic transducers is an authoritative review of key developments for engineers and materials scientists involved in this area of technology as well as in its applications in sectors as diverse as electronics, wireless communication and medical diagnostics. - Reviews recent research in the design and application of ultrasonic transducers - Provides an overview of the materials and design of ultrasonic transducers, with an in-depth exploration of piezoelectricity and basic configurations - Investigates modelling and characterisation, applications of ultrasonic transducers, and ultrasonic transducers for use at high temperature and in flaw detection systems
Book Synopsis Transducers and Arrays for Underwater Sound by : Charles Sherman
Download or read book Transducers and Arrays for Underwater Sound written by Charles Sherman and published by Springer Science & Business Media. This book was released on 2007-01-05 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most comprehensive book on electroacoustic transducers and arrays for underwater sound Includes transducer modeling techniques and transducer designs that are currently in use Includes discussion and analysis of array interaction and nonlinear effects in transducers Contains extensive data in figures and tables needed in transducer and array design Written at a level that will be useful to students as well as to practicing engineers and scientists
Book Synopsis A Treatise on Acoustic Radiation: Acoustic transducers by : Sam Hanish
Download or read book A Treatise on Acoustic Radiation: Acoustic transducers written by Sam Hanish and published by . This book was released on 1981 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spatial Frequency Characteristics of Opto-acoustic Transducers by : Behzad Noorbehesht
Download or read book Spatial Frequency Characteristics of Opto-acoustic Transducers written by Behzad Noorbehesht and published by . This book was released on 1980 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis European Workshop on Structural Health Monitoring by : Piervincenzo Rizzo
Download or read book European Workshop on Structural Health Monitoring written by Piervincenzo Rizzo and published by Springer Nature. This book was released on 2022-06-21 with total page 1078 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume gathers the latest advances, innovations, and applications in the field of structural health monitoring (SHM) and more broadly in the fields of smart materials and intelligent systems, as presented by leading international researchers and engineers at the 10th European Workshop on Structural Health Monitoring (EWSHM), held in Palermo, Italy on July 4-7, 2022. The volume covers highly diverse topics, including signal processing, smart sensors, autonomous systems, remote sensing and support, UAV platforms for SHM, Internet of Things, Industry 4.0, and SHM for civil structures and infrastructures. The contributions, which are published after a rigorous international peer-review process, highlight numerous exciting ideas that will spur novel research directions and foster multidisciplinary collaboration among different specialists.
Book Synopsis Underwater Electroacoustic Transducers by : D. Stansfield
Download or read book Underwater Electroacoustic Transducers written by D. Stansfield and published by . This book was released on 1990 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book attempts to describe the principles and practical aspects involved in the design of underwater electroacoustic transducers. It aims to improve the user's understanding of the significance of the various characteristics which need to be defined in specifying his transducer requirement.
Book Synopsis Multiscale Lattices and Composite Materials: Optimal Design, Modeling and Characterization by : Fernando Fraternali
Download or read book Multiscale Lattices and Composite Materials: Optimal Design, Modeling and Characterization written by Fernando Fraternali and published by Frontiers Media SA. This book was released on 2019-11-26 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Introduction to Theory and Design of Sonar Transducers by : Oscar Bryan Wilson
Download or read book Introduction to Theory and Design of Sonar Transducers written by Oscar Bryan Wilson and published by . This book was released on 1988 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Srinivasan Gopalakrishnan Publisher :Springer Science & Business Media ISBN 13 :0857292846 Total Pages :506 pages Book Rating :4.8/5 (572 download)
Book Synopsis Computational Techniques for Structural Health Monitoring by : Srinivasan Gopalakrishnan
Download or read book Computational Techniques for Structural Health Monitoring written by Srinivasan Gopalakrishnan and published by Springer Science & Business Media. This book was released on 2011-08-01 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increased level of activity on structural health monitoring (SHM) in various universities and research labs has resulted in the development of new methodologies for both identifying the existing damage in structures and predicting the onset of damage that may occur during service. Designers often have to consult a variety of textbooks, journal papers and reports, because many of these methodologies require advanced knowledge of mechanics, dynamics, wave propagation, and material science. Computational Techniques for Structural Health Monitoring gives a one-volume, in-depth introduction to the different computational methodologies available for rapid detection of flaws in structures. Techniques, algorithms and results are presented in a way that allows their direct application. A number of case studies are included to highlight further the practical aspects of the selected topics. Computational Techniques for Structural Health Monitoring also provides the reader with numerical simulation tools that are essential to the development of novel algorithms for the interpretation of experimental measurements, and for the identification of damage and its characterization. Upon reading Computational Techniques for Structural Health Monitoring, graduate students will be able to begin research-level work in the area of structural health monitoring. The level of detail in the description of formulation and implementation also allows engineers to apply the concepts directly in their research.
Book Synopsis Millimeter-Wave Acoustic Transducers by : C. F. Quate
Download or read book Millimeter-Wave Acoustic Transducers written by C. F. Quate and published by . This book was released on 1988 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: The project is aimed at developing a strategy for generating coherent sound waves in solids and liquids at very high frequencies, i.e., above 2000 GHz. Sound waves at these frequencies are important probes for investigating the physical properties of solids and liquids. Our approach is directed toward the use of periodic structures in piezoelectric films of zinc oxide. These multilayer films with alternate layers of piezoelectric active material will serve as efficient transducers if the period of the alternate layers are equal to the wavelength of sound. Multilayer transducers have been fabricated that work at 16, 32 and 96 GHz. Their use is forecasted in a number of applications such as the cryogenic acoustic microscope. Keywords: Sound waves; Microwave frequencies; Multilayer transducers; Piezoelectric films; Cryogenic acoustic microscope; Zinc oxide. (JHD).
