Signal Processing And Pattern Recognition In Nondestructive Evaluation Of Materials
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Signal Processing And Pattern Recognition In Nondestructive Evaluation Of Materials
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Author : C.H. Chen
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Signal Processing And Pattern Recognition In Nondestructive Evaluation Of Materials written by C.H. Chen and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Computers categories.
The NATO Advanced Research Workshop on Signal Processing and Pattern Recognition in Nondestructive Evaluation (NOE) of Materials was held August 19-22, 1987 at the Manoir St-Castin, Lac Beauport, Quebec, Canada. Modern signal processing, pattern recognition and artificial intelligence have been playing an increasingly important role in improving nondestructive evaluation and testing techniques. The cross fertilization of the two major areas can lead to major advances in NOE as well as presenting a new research area in signal processing. With this in mind, the Workshop provided a good review of progress and comparison of potential techniques, as well as constructive discussions and suggestions for effective use of modern signal processing to improve flaw detection, classification and prediction, as well as material characterization. This Proceedings volume includes most presentations given at the Workshop. This publication, like the meeting itself, is unique in the sense that it provides extensive interactions among the interrelated areas of NOE. The book starts with research advances on inverse problems and then covers different aspects of digital waveform processing in NOE and eddy current signal analysis. These are followed by four papers of pattern recognition and AI in NOE, and five papers of image processing and reconstruction in NOE. The last two papers deal with parameter estimation problems. Though the list of papers is not extensive, as the field of NOE signal processing is very new, the book has an excellent collection of both tutorial and research papers in this exciting new field.
Signal Processing And Pattern Recognition Of Ultrasonic Waveforms For The Nondestructive Evaluation Of Materials
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Author : J. Kent Bryan
language : en
Publisher:
Release Date : 1977
Signal Processing And Pattern Recognition Of Ultrasonic Waveforms For The Nondestructive Evaluation Of Materials written by J. Kent Bryan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with categories.
The overall goal of this project has been to further investigate signal processing and pattern recognition techniques as to how they apply in the nondestructive evaluation of materials for classifying ultrasonic pulse echo waveforms. Computer programs were developed to implement algorithms to generate power spectrum, cepstrum, and auto-correlation waveforms from the ultrasonic pulse echo waveforms. These algorithms have a firm statistical foundation and also have properties associated with them that allow the Fast Fourier Transform to be utilized in an efficient manner. Also, statistical features were extracted from the waveforms. The features were then input to pattern recognition techniques in order to classify the data into appropriate material defects. The procedure outlined above was implemented with 49 ultrasonic pulse echo waveforms obtained from flat-bottom holes of eight different diameters. A recognition accuracy of 98% has been attained when the flat-bottom holes are classified into two categories using only one feature from the original ultrasonic pulse echo waveforms reflected from the flat-bottom holes. The same results are achieved when the one feature is either the maximum amplitude, the root-mean-square value, or the variance of the waveform. An unexpected result was also observed when a time series method was applied to the portions of the ultrasonic pulse echo waveforms that were reflected from the backwalls instead of the flat-bottom holes.
A Signal Processing Study Of Ultrasonic Nondestructive Evaluation Of Materials
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Author : C. H. Chen
language : en
Publisher:
Release Date : 1987
A Signal Processing Study Of Ultrasonic Nondestructive Evaluation Of Materials written by C. H. Chen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with categories.
In this research the use of modern signal processing and digital pattern recognition in ultrasonic NDE of materials is examined. The high resolution Burg's maximum entropy spectral analysis is shown to provide vital information on the differences among various defect geometries in an aluminum plate. A number of important features computed from the power spectrum have been identified, which in conjunction with correlation matching and by using multi-transducer data can effectively classify the test specimen into three major categories: flat, angular cut, and circular holes and to determine the angles in a multi-stage classification procedure. Size estimation is still a problem that requires further study. Three estimation is still a problem that requires further study. Three deconvolved results. The research clearly shows that the effectiveness of ultrasonic spectroscopy as pioneered by O. Gericke can be significantly improved by using modern digital signal processing and digital pattern recognition.
Advances In Signal Processing For Nondestructive Evaluation Of Materials
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Author : Xavier Maldague
language : en
Publisher: Springer Science & Business Media
Release Date : 1994
Advances In Signal Processing For Nondestructive Evaluation Of Materials written by Xavier Maldague and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Computers categories.
Non-Destructive Evaluation (NDE) is now playing an increasing role in the modern global economy, in security-sensitive industries, for instance. The complexity of the inspection task and either large or limited lot runs now require more operator-assisted or fully automated signal processing. This book deals with both fields of expertise: NDE and signal processing.
The Application Of Digital Signal Processing And Pattern Recognition To Ultrasonic And Electromagnetic Nondestructive Testing And Evaluation
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Author : G. P. Singh
language : en
Publisher:
Release Date : 1991
The Application Of Digital Signal Processing And Pattern Recognition To Ultrasonic And Electromagnetic Nondestructive Testing And Evaluation written by G. P. Singh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Nondestructive testing categories.
Ultrasonic And Advanced Methods For Nondestructive Testing And Material Characterization
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Author : Chi-hau Chen
language : en
Publisher: World Scientific
Release Date : 2007
Ultrasonic And Advanced Methods For Nondestructive Testing And Material Characterization written by Chi-hau Chen and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Medical categories.
Ultrasonic methods have been very popular in nondestructive testing and characterization of materials. This book deals with both industrial ultrasound and medical ultrasound. The advantages of ultrasound include flexibility, low cost, in-line operation, and providing data in both signal and image formats for further analysis. The book devotes 11 chapters to ultrasonic methods. However, ultrasonic methods can be much less effective with some applications. So the book also has 14 chapters catering to other or advanced methods for nondestructive testing or material characterization. Topics like structural health monitoring, Terahertz methods, X-ray and thermography methods are presented. Besides different sensors for nondestructive testing, the book places much emphasis on signal/image processing and pattern recognition of the signals acquired.
Advances In Signal Processing For Nondestructive Evaluation Of Materials
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Author : X.P. Maldague
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Advances In Signal Processing For Nondestructive Evaluation Of Materials written by X.P. Maldague and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.
Non-Destructive Evaluation (NDE) is now playing an increasing role in our modern global economy; in security sensitive industries, for instance. The complexity of the inspection task and either large or limited lot runs now require more operator-assisted or fully- automated signal processing. This book deals with both fields of expertise: NDE and signal processing. On the signal processing side, in the particular context of NDE applications, the following topics are discussed: sensor fusion, signal knowledge representation, artificial intelligence, fuzzy logic, computer vision, integration of numeric and non-numeric informations, parallel decomposition, noise processing and calibration of sensor devices as well as reliability of detection. Some hardware considerations are introduced as well, to discuss platforms on which processing is done. On the NDE side, applications include advances in holographic interferometry, microwave resonance or shearography and also on more traditional NDE techniques such as ultrasonics, infrared techniques, X-ray, computed tomography, Eddy currents. Inverse problems are also discussed. This book is required reading for those who already have some experience in one or both fields (signal processing and/or NDE).
International Advances In Nondestructive Testing
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Author : Warren J. McGonnagle
language : en
Publisher: CRC Press
Release Date : 1989
International Advances In Nondestructive Testing written by Warren J. McGonnagle and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Technology & Engineering categories.
Handbook Of Pattern Recognition Computer Vision
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Author : Chi-hau Chen
language : en
Publisher: World Scientific
Release Date : 1999
Handbook Of Pattern Recognition Computer Vision written by Chi-hau Chen and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Computers categories.
Annotation. Presents the latest research findings in theory, techniques, algorithms, and major applications of pattern recognition and computer vision, as well as new hardware and architecture aspects. Contains sections on basic methods in pattern recognition and computer vision, nine recognition applications, inspection and robotic applications, and architectures and technology. Some areas discussed include cluster analysis, 3D vision of dynamic objects, speech recognition, computer vision in food handling, and video content analysis and retrieval. This second edition is extensively revised to describe progress in the field since 1993. Chen is affiliated with the electrical and computer engineering department at the University of Massachusetts-Dartmouth. Annotation copyrighted by Book News, Inc., Portland, OR.
Non Destructive Testing
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Author : J. Boogaard
language : en
Publisher: Elsevier
Release Date : 2012-12-02
Non Destructive Testing written by J. Boogaard and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-02 with Technology & Engineering categories.
Non-Destructive Testing (NDT) is an activity closely related to the quality and reliability of products, and to the reliable and safe operation of industrial plants. Physical measuring techniques are used to examine parts of constructional assemblies for hidden imperfections and defects. A wide choice of measuring techniques is available to meet the demand of examining a wide variety of materials such as metals, plastics, rocks, as well as different structures and sizes ranging from semiconductor chips to nuclear reactors and off-shore oil platforms. Activities in the field of NDT encompass: Fundamental research to understand and describe the way in which reactions of certain imperfections to a physical measuring technique can be optimized and used to assess type and grade of imperfection; Methods to characterize materials and materials properties; Applications in product quality control; Applications in plant inspection to ensure a reliable operation of components, avoiding damage to both man and environment, as well as financial losses; Personnel education and qualification schemes; The spread of NDT applications to newly industrialized countries. The two proceedings volumes contain over 400 review and specialist papers. The most recent developments in the field of NDT are presented with contributions by outstanding experts from all over the world. Papers are grouped according to technique for those dealing with fundamental research and to field of application for the more practical oriented ones. In this way each chapter provides an easy overview of related current research. Extensive keyword indexes have been included to facilitate the retrieval of information according to individual requirements. The high technical level of the papers and their up-to-date content will make them an indispensable source of information for students, researchers and professionals in the areas covered.