underwater acoustics analysis design and performance of sonar

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Underwater Acoustics

Author : Richard P. Hodges
ISBN : 9781119957492
Genre : Science
File Size : 90. 13 MB
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Offering complete and comprehensive coverage of modern sonar spectrum system analysis, Underwater Acoustics: Analysis, Design and Performance of Sonar provides a state-of-the-art introduction to the subject and has been carefully structured to offer a much-needed update to the classic text by Urick. Expanded to included computational approaches to the topic, this book treads the line between the highly theoretical and mathematical texts and the more populist, non-mathematical books that characterize the existing literature in the field. The author compares and contrasts different techniques for sonar design, analysis and performance prediction and includes key experimental and theoretical results, pointing the reader towards further detail with extensive references. Practitioners in the field of sonar design, analysis and performance prediction as well as graduate students and researchers will appreciate this new reference as an invaluable and timely contribution to the field. Chapters include the sonar equation, radiated, self and ambient noise, active sonar sources, transmission loss, reverberation, transducers, active target strength, statistical detection theory, false alarms, contacts and targets, variability and uncertainty, modelling detections and tactical decision aids, cumulative probability of detection, tracking target motion analysis and localization, and design and evaluation of sonars


Author : Michael Möser
ISBN : 9783662566381
Genre : Technology & Engineering
File Size : 32. 53 MB
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In diesem Band der Reihe Fachwissen Technische Akustik werden passive und aktive hydroakustische Messsysteme und -verfahren vorgestellt, die für Wasserschallmessungen im Meer verwendet werden. Auch wenn viele Verfahren aus dem Bereich des Luftschalls grundsätzlich auf Wasserschall übertragbar sind, so ergeben sich aufgrund der akustischen Eigenschaften des Meeres und der begrenzenden Flächen (Meeresboden und -oberfläche) sowie der spezifischen Eigenschaften der hydroakustischen Messtechnik doch signifikante Unterschiede. Nach einer Einführung in die für Wasserschallmessungen gebräuchlichen Mess- und (spektralen) Pegelgrößen und die Grundlagen der hydroakustischen Sensorik wird ein Überblick über die meeresakustischen Randbedingungen gegeben. Für jede Wasserschallmessung ist die Kenntnis der Schallausbreitungsbedingungen und der Umgebungsgeräusche im Meer von zentraler Bedeutung. Anhand von zwei typischen Messaufgaben, der Bestimmung des Quell- oder Zielpegels eines Schiffes und der von Rammschall bei der Errichtung von Offshore-Windenergieanlagen, werden dann unterschiedliche stationäre und driftende Sensorsysteme im Detail vorgestellt. Anschließend wird auf die Vor- und Nachteile von geschleppten Sensorsystemen, wie der horizontalen Richtungsbildung und dem strömungsinduzierten Eigenstörgeräusch, näher eingegangen. Im letzten Abschnitt dieses Kapitels werden aktive Verfahren und Systeme behandelt, die bei Untersuchungen des Meeresbodens, der Schallausbreitung im Meer und der Rückstreu- und Absorptionseigenschaften getauchter Objekte sowie bei der Kalibrierung von hydroakustischen Antennen Verwendung finden.

Umgebungskartenschaetzung Aus Sidescan Sonardaten Fuer Ein Autonomes Unterwasserfahrzeug

Author : Woock, Philipp
ISBN : 9783731505419
Genre :
File Size : 51. 71 MB
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Proceedings Of The Sixth International Conference On Green And Human Information Technology

Author : Seong Oun Hwang
ISBN : 9789811303111
Genre : Technology & Engineering
File Size : 38. 37 MB
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This volume presents the Proceedings of the Sixth International Conference on Green and Human Information Technology (ICGHIT), held in Chiang Mai, Thailand, Jan 31-Feb 2, 2018. ICGHIT is the unique global conference for researchers, industry professionals, and academics interested in the latest development of green and human information technology. Its broad scope ranges from electronics to communications, computers, multimedia and signal processing, control and intelligent systems, IC and convergence technologies, which are related to green and human issues such as energy saving and human welfare. Specially in this volume, ICGHIT covers state-of-the-art technologies for the 4th industrial revolution, for example, cyber security, big data and cloud service, smart medical system, machine learning and its applications.

Developments And Advances In Defense And Security

Author : Álvaro Rocha
ISBN : 9783319786056
Genre : Computers
File Size : 24. 95 MB
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This book includes a selection of articles from The 2018 Multidisciplinary International Conference of Research Applied to Defense and Security (MICRADS’18), held in Salinas, Peninsula de Santa Elena, Ecuador, from April 18 to 20, 2018. MICRADS is an international forum for researchers and practitioners to present and discuss the most recent innovations, trends, results, experiences and concerns in the various areas of defense and security, together with their technological development and applications. The main topics covered are: Information and Communication Technology in Education; Computer Vision in Military Applications; Engineering Analysis and Signal Processing; Cybersecurity and Cyberdefense; Maritime Security and Safety; Strategy, Geopolitics and Oceanopolitics; Defense planning; Leadership (e-leadership); Defense Economics; Defense Logistics; Health Informatics in Military Applications; Simulation in Military Applications; Computer Networks, Mobility and Pervasive Systems; Military Marketing; Military Physical Training; Assistive Devices and Wearable Technology; Naval and Military Engineering; Weapons and Combat Systems; Operational Oceanography. The book is aimed at all those dealing with defense and security issues, including practitioners, researchers and teachers as well as undergraduate, graduate, master’s and doctorate students.

Advances In Acoustic Microscopy And High Resolution Imaging

Author : Roman Gr. Maev
ISBN : 9783527655328
Genre : Science
File Size : 52. 54 MB
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Novel physical solutions, including new results in the field of adaptive methods and inventive approaches to inverse problems, original concepts based on high harmonic imaging algorithms, intriguing vibro-acoustic imaging and vibro-modulation technique, etc. were successfully introduced and verified in numerous studies of industrial materials and biomaterials in the last few years. Together with the above mentioned traditional academic and practical avenues in ultrasonic imaging research, intriguing scientific discussions have recently surfaced and will hopefully continue to bear fruits in the future. The goal of this book is to provide an overview of the recent advances in high-resolution ultrasonic imaging techniques and their applications to biomaterials evaluation and industrial materials. The result is a unique collection of papers presenting novel results and techniques that were developed by leading research groups worldwide. This book offers a number of new results from well-known authors who are engaged in aspects of the development of novel physical principles, new methods, or implementation of modern technological solutions into current imaging devices and new applications of high-resolution imaging systems. The ultimate purpose of this book is to encourage more research and development in the field to realize the great potential of high resolution acoustic imaging and its various industrial and biomedical applications.

Underwater Acoustic Data Processing

Author : Y. T. Chan
ISBN : 0792301277
Genre : Science
File Size : 54. 89 MB
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This book contains the papers that were accepted for presentation at the 1988 NATO Advanced Study Institute on Underwater Acoustic Data Processing, held at the Royal Military College of Canada from 18 to 29 July, 1988. Approximately 110 participants from various NATO countries were in attendance during this two week period. Their research interests range from underwater acoustics to signal processing and computer science; some are renowned scientists and some are recent Ph.D. graduates. The purpose of the ASI was to provide an authoritative summing up of the various research activities related to sonar technology. The exposition on each subject began with one or two tutorials prepared by invited lecturers, followed by research papers which provided indications of the state of development in that specific area. I have broadly classified the papers into three sections under the titles of I. Propagation and Noise, II. Signal Processing and III. Post Processing. The reader will find in Section I papers on low frequency acoustic sources and effects of the medium on underwater acoustic propagation. Problems such as coherence loss due to boundary interaction, wavefront distortion and multipath transmission were addressed. Besides the medium, corrupting noise sources also have a strong influence on the performance of a sonar system and several researchers described methods of modeling these sources.

Principles Of Sonar Performance Modelling

Author : Michael Ainslie
ISBN : 3540876626
Genre : Technology & Engineering
File Size : 44. 59 MB
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Sonar performance modelling (SPM) is concerned with the prediction of quantitative measures of sonar performance, such as probability of detection. It is a multi-disciplinary subject, requiring knowledge and expertise in the disparate fields of underwater acoustics, acoustical oceanography, sonar signal processing and statistical detection theory. No books have been published on this subject, however, since the 3rd edition of Urick’s classic work 25 years ago and so Dr Ainslie’s book will fill a much-needed gap in the market. Currently, up-to-date information can only be found, in different forms and often with conflicting information, in various journals, conference and textbook publications. Dr Michael Ainslie is eminently qualified to write this unique book. He has worked on sonar performance modeling problems since 1983. He has written many peer reviewed research articles and conference papers related to sonar performance modeling, making contributions in the fields of sound propagation and detection theory.

Digital Underwater Acoustic Communications

Author : Lufen Xu
ISBN : 9780128030295
Genre : Technology & Engineering
File Size : 61. 59 MB
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Digital Underwater Acoustic Communications focuses on describing the differences between underwater acoustic communication channels and radio channels, discusses loss of transmitted sound in underwater acoustic channels, describes digital underwater acoustic communication signal processing, and provides a comprehensive reference to digital underwater acoustic communication equipment. This book is designed to serve as a reference for postgraduate students and practicing engineers involved in the design and analysis of underwater acoustic communications systems as well as for engineers involved in underwater acoustic engineering. Introduces the basics of underwater acoustics, along with the advanced functionalities needed to achieve reliable communications in underwater environment Identifies challenges in underwater acoustic channels relative to radio channels, underwater acoustic propagation, and solutions Shows how multi-path structures can be thought of as time diversity signals Presents a new, robust signal processing system, and an advanced FH-SS system for multimedia underwater acoustic communications with moderate communication ranges (above 20km) and rates (above 600bps) Describes the APNFM system for underwater acoustic communication equipment (including both civil and military applications), to be employed in active sonar to improve its performance

K Rperschall

Author : L. Cremer
ISBN : 9783642499227
Genre : Science
File Size : 29. 87 MB
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