Author: L.E Drain
Publisher: Routledge
ISBN: 1351435590
Category : Science
Languages : en
Pages : 462
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Book Description
The first book devoted to laser techniques in the generation and reception of ultrasonic waves in materials, Laser Ultrasonics: Techniques and Applications provides a full description of the state of the art in all fields involving both lasers and ultrasonics. This practical book focuses mainly on the possible applications of the techniques, yet th
Author: I. K. Lewis
Publisher:
ISBN: 9781682513194
Category : Lasers
Languages : en
Pages : 292
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 71
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Book Description
The terms Laser Ultrasonics (LU) and Laser based Ultrasonics (LBU) relate to a range of testing and measurement configurations that employ lasers both to generate and to detect ultrasonic signals at the surface of opaque materials or in the bulk of transparent media. The ability to perform ultrasonic measurements in a remote and non-contacting manner using laser methods has produced significant interest in this measurement technology from a range of users. Numerous demonstrations of the technology in university, government and industrial laboratories have shown the flexibility and promise of laser ultrasonics and have pointed to its potential limitations. Unlike conventional ultrasonic methods which have experienced broad use in a variety of applications (industrial quality control, materials process sensing, medical imaging, infrastructure inspection), laser based methods have been used primarily in research programs and in technology demonstrations. Unfortunately, even with successful demonstrations, the use of laser ultrasonics outside the research environment has not occurred. In part, the movement of this technology to broader application has been limited by the nature of laser ultrasonic technology development.
Author: James Wagner
Publisher:
ISBN:
Category : Lasers
Languages : en
Pages : 84
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Book Description
Author: Tribikram Kundu
Publisher: CRC Press
ISBN: 9780203501962
Category : Science
Languages : en
Pages : 848
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Book Description
Most books on ultrasonic nondestructive evaluation (NDE) focus either on its theoretical background or on advanced applications. Furthermore, information on the most current applications, such as guided wave techniques and acoustic microscopy, is scattered throughout various conference proceedings and journals. No one book has integrated these aspe
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 44
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Book Description
Author: Chad L. Butler
Publisher:
ISBN:
Category : Lasers
Languages : en
Pages : 100
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Book Description
Laser ultrasonics can be used to nondestructively evaluate structures to determine the existence and location of surface and interior flaws. The goal of this research was to determine if laser ultrasonic techniques can be applied to the inspection of aluminum plate. titanium tubes, and large welded plate structures. The research was carried out with a Q-switched pulsed ruby laser emitting light of 694 nm wavelength. Ultrasonic waves were experimentally generated and recorded in the aluminum plate and the titanium tube. A comprehensive literature study was completed to determine if the technique can be applied to welded structures. For the two experimental cases, the ultrasonic waves were received by a piezoelectric pinducer which was located on the opposite side of the plate. and on the outside of the tube. A digital oscilloscope captured the signals from the pinducer. The signals were then analyzed to determine echo spacing and frequency content. The physical characteristics of the laser pulse such as the energy and full-width-half-height and amplitudes were measured via a photodiode system and a calorimeter. The aluminum plate confirmed that the system was functioning properly, as the ultrasonic echoes that were generated matched the expected results from previous experimentation. The titanium tube data turned out to be difficult to interpret due to the complex geometry and mode conversion. The welding research showed that ultrasound can be used to identify many types of flaws in a welded joint. Currently, few researchers have applied the laser based ultrasound to flaw detection in finished welds, although several have looked at using the laser ultrasound as an input to a control system for a weld in progress. The literature research uncovered the need for further studies on the application of laser based ultrasound to flaw detection in completed welds.
Author: Mami Matsukawa
Publisher: IOP Publishing Limited
ISBN: 9780750349345
Category : Medical
Languages : en
Pages : 0
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Book Description
This book provides a review of state-of-art technological developments in applied ultrasonics with a focus on recent advances in ultrasonic research, covering metrological applications, non-destructive evaluation, sensing, devices, and physics, as well as medical diagnosis and treatment. The first part of this book focuses on the physics of acoustic waves, and their propagation and addresses viscoelasticity, as well as metrological applications including laser ultrasonics. Part two reviews some recent developments of importance to industrial applications, whilst the final part introduces developments in biomedical applications. The book will be an essential resource and instructional guide to the field for a broad range of students, researchers, and engineers. The reader can readily understand the direction of research in the subject, appreciate the numerous possibilities of using ultrasound, and grasp the potential applications of the phenomenon and current challenges. Key Features: Encompasses fundamental physics and applications. Provides state-of-art technological coverage in applied ultrasonics Reviews recent research and applications in science, medicine and industrial settings. Provides an introductory overview for each chapter. Transfers key technologies, helping the reader to quickly acquire measurement skills.
Author:
Publisher: Contentsworks Inc.
ISBN: 4862163351
Category :
Languages : en
Pages : 25
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
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Book Description
Laser-ultrasonics refers to a range of technologies involving the use of laser electrooptical systems both to generate and to detect ultrasonic signals in and on materials and structures. Such systems have been developed to permit classical ultrasonic measurements for materials characterization and defect identification and measurement. From the point of view of one concerned with practical applications of ultrasonic inspection and measurement methods, laser-ultrasonic systems offer the flexibility which, in principle, should permit remote ultrasonic measurements to be performed on objects at elevated temperatures or in hostile environments. Laser-ultrasonic systems can be designed and constructed with extremely wide and flat detection bandwidth so that ultrasonic vibrational displacements can be recorded with high fidelity. In addition, there is no mechanical loading of the surface to damp, absorb, or otherwise distort the propagating acoustic energy. This feature has been used to great advantage in performing ultrasonic measurements in thin plates and films. In spite of the great advantages offered by laser-ultrasonics, there are severe limitations which restrict its application. In fact, based upon the performance of current state-of-the-art laser-ultrasonic systems, it is almost always more advantageous to use conventional ultrasonic transduction methods, if possible for a given application, than it is to apply laser-ultrasonics. In short, the main reason leading to this conclusion is the poor system detection sensitivity of laser-ultrasonic systems compared with piezoelectric transducer systems. The ramifications of this limited sensitivity are many.
