Implementation And Evaluation Of A Two Dimensional Laser Doppler Vibrometer System For Non Contact Monitoring Of External Stress Loading Of Aluminum Samples

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Implementation and Evaluation of a Two-dimensional Laser Doppler Vibrometer System for Non-contact Monitoring of External Stress Loading of Aluminum Samples

Author : Paul Wesley Langston
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (668 download)

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Book Synopsis Implementation and Evaluation of a Two-dimensional Laser Doppler Vibrometer System for Non-contact Monitoring of External Stress Loading of Aluminum Samples by : Paul Wesley Langston

Download or read book Implementation and Evaluation of a Two-dimensional Laser Doppler Vibrometer System for Non-contact Monitoring of External Stress Loading of Aluminum Samples written by Paul Wesley Langston and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis details the development and validation of a laser Doppler vibrometer-based measurement system that is capable of quantifying not only the normal vibration of a solid body but also the component of vibration that is parallel to the plane containing the surface of interest. LDV manufacturers produce various devices that capture 3D measurements in a beam configuration that can be used to decompose the measured signals into not only the normal velocity of the surface of an object but also two orthogonal in-plane components of the vibration. It was a slightly simplified two-dimensional version of this approach that was chosen for implementation in the Wave Physics Lab using individual components to create a cheaper, more flexible system than those produced by companies such as Polytec. The goal of this system is to facilitate the exploration and discovery of areas and applications where 2D measurement may provide a more complete and precise view of the physics of different phenomena. Upon completion of the system development and validation, a study was done that sought to measure the acoustoelastic effect in an Aluminum plate by measuring how increasing loads alter both the normal and in-plane components of Lamb wave propagation in the plate. The acoustoelastic effect is the effect of stress on wave speed caused by non-linearity in the propagation medium.

Laser Doppler Vibrometry for Non-Contact Diagnostics

Author : Kristian Kroschel
Publisher : Springer Nature
ISBN 13 : 3030466914
Total Pages : 187 pages
Book Rating : 4.0/5 (34 download)

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Book Synopsis Laser Doppler Vibrometry for Non-Contact Diagnostics by : Kristian Kroschel

Download or read book Laser Doppler Vibrometry for Non-Contact Diagnostics written by Kristian Kroschel and published by Springer Nature. This book was released on 2020-06-09 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents recent outcomes of the collaborative “Tricorder” project, which brings together partners from industry, research institutes and hospitals to deliver an easy contactless alternative for electrocardiograms (ECG). Featuring contributions investigating the possible applications of laser Doppler vibrometry (LDV) signals for the remote measurement of vital parameters of the heart, the book provides insights into the vision and the history of the "Tricorder" project and the basic differences between the vibrocardiograms and electrocardiograms. It also discusses topics such as signal processing, heartbeat measurement techniques, respiration frequency and oxygen saturation determination, with a particular focus on the diagnostic value of the method presented, e.g., diagnosis of atrial fibrillation and estimation of the oxygen saturation in premature infants. Further, the authors review the advantages and drawbacks of the new method and the specific fields of application. This book will appeal to researchers and industry leaders interested in laser remote sensing for medical applications as well as medical professionals curious about new healthcare technologies.

Laser Doppler Vibrometer for Efficient Structural Health Monitoring

Author : Vinod K. Sharma
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (43 download)

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Book Synopsis Laser Doppler Vibrometer for Efficient Structural Health Monitoring by : Vinod K. Sharma

Download or read book Laser Doppler Vibrometer for Efficient Structural Health Monitoring written by Vinod K. Sharma and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The research effort in this thesis is devoted to develop techniques to accurately and rapidly identify the location, orientation, and magnitude of the defects by using structural health monitoring concepts that use Laser Doppler Vibrometer as a non-contact sensor with multi-point sensing capability. The first research area addresses the formulation and validation of an innovative Damage Measure that is based on the ratios of the strain energy distributions of the damaged and undamaged structure. The innovations include use of a single set of actuator/sensor pair to excite and detect the responses of a structure for low frequency vibrations as well as guided wave propagation studies. A second new capability is the estimation of the Damage Measure without requiring any knowledge of the undamaged baseline structure. This method is made possible because of the development of these new technologies: Spatial Decimation and Wavenumber/Frequency filtering. The third contribution is to develop analytical models for the structural dynamics of damaged structure and seek solutions that use perturbation methods to detect damage in a plate structure. The fourth contribution is the development of a comprehensive damage detection technique over a wide frequency dynamic range. The fifth topic of research involves automation in Structural Health Monitoring based on the comprehensive Damage Measure formulation. Under the control of software the Scanning Laser Doppler Vibrometer is used to acquire the low frequency vibration mode data for a coarse identification of all the suspect regions of damage using a threshold criterion on the Damage Measure. Each suspect region of damage is further investigated using the high frequency elastic wave propagation to clearly identify the location, orientation, and extent of the damage. The computer control of the Laser Doppler Vibrometer and a quantitative assessment of the damage provide the enabling technologies for the automation proof of concept. Finally the developed techniques of damage detection are successfully demonstrated on practical structures such as a turbine blade in the laboratory and an F-15 vertical tail in field maintenance conditions.

Laser Doppler Vibrometry for Cardiovascular Monitoring and Photoacoustic Imaging

Author : Laura Mignanelli
Publisher :
ISBN 13 : 9783869488172
Total Pages : pages
Book Rating : 4.4/5 (881 download)

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Book Synopsis Laser Doppler Vibrometry for Cardiovascular Monitoring and Photoacoustic Imaging by : Laura Mignanelli

Download or read book Laser Doppler Vibrometry for Cardiovascular Monitoring and Photoacoustic Imaging written by Laura Mignanelli and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Continuous Scanning Laser Doppler Vibrometry for Synchronized Array Measurements

Author : Muhammad Salman
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (844 download)

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Book Synopsis Continuous Scanning Laser Doppler Vibrometry for Synchronized Array Measurements by : Muhammad Salman

Download or read book Continuous Scanning Laser Doppler Vibrometry for Synchronized Array Measurements written by Muhammad Salman and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser Doppler Vibrometry (LDV) is a non-contact technique for sensing surface vibrations. Traditionally, LDV uses one or more fixed beams to measure the vibrational velocity of specific points and orientations. In order to measure an angular velocity at least two laser beams are required. Instead, this research proposes to develop a Continuous Scanning Laser Doppler Vibrometer (CSLDV)technique, based on a single laser beam continuously sweeping the area of interest using a scanning mirror. Linear scans allow the measurement of normal and angular velocity while circular scans allow the measurement of normal velocity and two angular velocities. The first part of the study analyzes the performance of rigid body models of both the short line and circular scans (

Handbook of Experimental Structural Dynamics

Author : Randall Allemang
Publisher : Springer
ISBN 13 : 9781461445463
Total Pages : 1403 pages
Book Rating : 4.4/5 (454 download)

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Book Synopsis Handbook of Experimental Structural Dynamics by : Randall Allemang

Download or read book Handbook of Experimental Structural Dynamics written by Randall Allemang and published by Springer. This book was released on 2022-08-06 with total page 1403 pages. Available in PDF, EPUB and Kindle. Book excerpt: The SEM Handbook of Experimental Structural Dynamics stands as a comprehensive overview and reference for its subject, applicable to workers in research, product design and manufacture, and practice. The Handbook is devoted primarily to the areas of structural mechanics served by the Society for Experimental Mechanics IMAC community, such as modal analysis, rotating machinery, structural health monitoring, shock and vibration, sensors and instrumentation, aeroelasticity, ground testing, finite element techniques, model updating, sensitivity analysis, verification and validation, experimental dynamics sub-structuring, quantification of margin and uncertainty, and testing of civil infrastructure. Chapters offer comprehensive, detailed coverage of decades of scientific and technologic advance and all demonstrate an experimental perspective. Several sections specifically discuss the various types of experimental testing and common practices utilized in the automotive, aerospace, and civil structures industries. · History of Experimental Structural Mechanics · DIC Methods - Dynamic Photogrammetry · LDV Methods · Applied Digital Signal Processing · Introduction to Spectral - Basic Measurements · Structural Measurements - FRF · Random and Shock Testing · Rotating System Analysis Methods * · Sensors Signal Conditioning Instrumentation · Design of Modal Tests · Experimental Modal Methods · Experimental Modal Parameter Evaluation · Operating Modal Analysis Methods * · Analytical Numerical Substructuring · Finite Element Model Correlation · Model Updating · Damping of Materials and Structures · Model Calibration and Validation in Structures* · Uncertainty Quantification: UQ, QMU and Statistics * · Nonlinear System Analysis Methods (Experimental) · Structural Health Monitoring and Damage Detection · Experimental Substructure Modeling · Modal Modeling · Response (Impedance) Modeling · Nonlinear Normal Mode Analysis Techniques (Analytical) * · Modal Modeling with Nonlinear Connection Elements (Analytical) · Acoustics of Structural Systems (VibroAcoustics) * · Automotive Structural Testing * · Civil Structural Testing · Aerospace Perspective for Modeling and Validation · Sports Equipment Testing * · Applied Math for Experimental Structural Mechanics * Chapter Forthcoming Contributions present important theory behind relevant experimental methods as well as application and technology. Topical authors emphasize and dissect proven methods and offer detail beyond a simple review of the literature. Additionally, chapters cover practical needs of scientists and engineers who are new to the field. In most cases, neither the pertinent theory nor, in particular, the practical issues have been presented formally in current academic textbooks. Each chapter in the Handbook represents a ’must read’ for someone new to the subject or for someone returning to the field after an absence. Reference lists in each chapter consist of the seminal papers in the literature. This Handbook stands in parallel to the SEM Handbook of Experimental Solid Mechanics, where this Handbook focuses on experimental dynamics of structures at a macro-scale often involving multiple components and materials where the SEM Handbook of Experimental Solid Mechanics focuses on experimental mechanics of materials at a nano-scale and/or micro-scale.

Laser Doppler Vibrometry

Author : Enrico Primo Tomasini
Publisher : Springer
ISBN 13 : 9783662613160
Total Pages : 164 pages
Book Rating : 4.6/5 (131 download)

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Book Synopsis Laser Doppler Vibrometry by : Enrico Primo Tomasini

Download or read book Laser Doppler Vibrometry written by Enrico Primo Tomasini and published by Springer. This book was released on 2020-07-31 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a continuous learning tool for experienced technical staff facing laser vibrometry technology for the first time. The book covers both theoretical aspects and practical applications of laser Doppler vibrometry, and is accompanied by a multimedia presentation that allows the audience to browse the content and come as close as possible to performing real experiments. After a brief introduction, Chapter 2 presents supporting theory, providing general information on light sources, light scattering and interference for a better understanding of the rest of the book. Chapter 3 examines the theory of laser vibrometers, explaining interferometers from an optical perspective and in terms of the related electronics. It also addresses options like tracking filters and different signal demodulation strategies, since these have a significant impact on the practical use of vibrometers. Chapter 4 explores the configurations that are encountered in today’s instrumentation, with a focus on providing practical suggestions on the use of laser vibrometers. Lastly, Chapter 5 investigates metrology for vibration and shock measurements using laser interferometry, and analyses the uncertainty of laser vibrometers in depth.

Adhesive Bonding of Aircraft Composite Structures

Author : Welchy Leite Cavalcanti
Publisher : Springer
ISBN 13 : 9783319928098
Total Pages : 350 pages
Book Rating : 4.9/5 (28 download)

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Book Synopsis Adhesive Bonding of Aircraft Composite Structures by : Welchy Leite Cavalcanti

Download or read book Adhesive Bonding of Aircraft Composite Structures written by Welchy Leite Cavalcanti and published by Springer. This book was released on 2021-06-04 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is open access under a CC BY 4.0 license. It presents the results of the ComBoNDT European project, which aimed at the development of more secure, time- and cost-saving extended non-destructive inspection tools for carbon fiber reinforced plastics, adhered surfaces and bonded joints. The book reports the optimal use of composite materials to allow weight savings, reduction in fuel consumptions, savings during production and higher cost efficiency for ground operations.

Guided-wave Structural Health Monitoring

Author : Ajay Raghavan
Publisher :
ISBN 13 :
Total Pages : 556 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Guided-wave Structural Health Monitoring by : Ajay Raghavan

Download or read book Guided-wave Structural Health Monitoring written by Ajay Raghavan and published by . This book was released on 2007 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Emerging Technologies in Non-Destructive Testing VI

Author : Danny Van Hemelrijck
Publisher : CRC Press
ISBN 13 : 1315647540
Total Pages : 592 pages
Book Rating : 4.3/5 (156 download)

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Book Synopsis Emerging Technologies in Non-Destructive Testing VI by : Danny Van Hemelrijck

Download or read book Emerging Technologies in Non-Destructive Testing VI written by Danny Van Hemelrijck and published by CRC Press. This book was released on 2015-11-24 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: Non-Destructive Testing (NDT) is of worldwide significance, and is strongly related to the detection of damage in engineering structures (buildings, bridges, aircrafts, ships, pressure vessels, etc.) using non-invasive techniques (ultrasound, X-rays, Radar, neutrons, thermography, vibrations, acoustic emission, etc.). Emerging Technologies in Non-D

Springer Handbook of Acoustics

Author : Thomas Rossing
Publisher : Springer Science & Business Media
ISBN 13 : 0387304460
Total Pages : 1179 pages
Book Rating : 4.3/5 (873 download)

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Book Synopsis Springer Handbook of Acoustics by : Thomas Rossing

Download or read book Springer Handbook of Acoustics written by Thomas Rossing and published by Springer Science & Business Media. This book was released on 2007-06-21 with total page 1179 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an unparalleled modern handbook reflecting the richly interdisciplinary nature of acoustics edited by an acknowledged master in the field. The handbook reviews the most important areas of the subject, with emphasis on current research. The authors of the various chapters are all experts in their fields. Each chapter is richly illustrated with figures and tables. The latest research and applications are incorporated throughout, including computer recognition and synthesis of speech, physiological acoustics, diagnostic imaging and therapeutic applications and acoustical oceanography. An accompanying CD-ROM contains audio and video files.

Modern Battery Engineering: A Comprehensive Introduction

Author : Birke Peter Kai
Publisher : World Scientific
ISBN 13 : 9813272171
Total Pages : 304 pages
Book Rating : 4.8/5 (132 download)

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Book Synopsis Modern Battery Engineering: A Comprehensive Introduction by : Birke Peter Kai

Download or read book Modern Battery Engineering: A Comprehensive Introduction written by Birke Peter Kai and published by World Scientific. This book was released on 2019-04-08 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: This richly illustrated book written by Professor Kai Peter Birke and several co-authors addresses both scientific and engineering aspects of modern batteries in a unique way. Emphasizing the engineering part of batteries, the book acts as a compass towards next generation batteries for automotive and stationary applications. The book provides distinguished answers to still open questions on how future batteries look like.Modern Battery Engineering explains why and how batteries have to be designed for successful commercialization in e-mobility and stationary applications. The book will help readers understand the principle issues of battery designs, paving the way for engineers to avoid wrong paths and settle on appropriate cell technologies for next generation batteries. This book is ideal for training courses for readers interested in the field of modern batteries.

Health Monitoring of Aerospace Structures

Author : Wieslaw Staszewski
Publisher : John Wiley & Sons
ISBN 13 : 9780470843406
Total Pages : 290 pages
Book Rating : 4.8/5 (434 download)

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Book Synopsis Health Monitoring of Aerospace Structures by : Wieslaw Staszewski

Download or read book Health Monitoring of Aerospace Structures written by Wieslaw Staszewski and published by John Wiley & Sons. This book was released on 2004-02-13 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing quality research for the reader, this title encompasses all the recent developments in smart sensor technology for health monitoring in aerospace structures, providing a valuable introduction to damage detection techniques. Focussing on engineering applications, all chapters are written by smart structures and materials experts from aerospace manufacturers and research/academic institutions. This key reference: Discusses the most important aspects related to smart technologies for damage detection; this includes not only monitoring techniques but also aspects related to specifications, design parameters, assessment and qualification routes. Presents real case studies and applications; this includes in-flight tests; the work presented goes far beyond academic research applications. Displays a balance between theoretical developments and engineering applications

Structural Health Monitoring (SHM) in Aerospace Structures

Author : Fuh-Gwo Yuan
Publisher : Woodhead Publishing
ISBN 13 : 0081001584
Total Pages : 516 pages
Book Rating : 4.0/5 (81 download)

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Book Synopsis Structural Health Monitoring (SHM) in Aerospace Structures by : Fuh-Gwo Yuan

Download or read book Structural Health Monitoring (SHM) in Aerospace Structures written by Fuh-Gwo Yuan and published by Woodhead Publishing. This book was released on 2016-03-01 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural Health Monitoring (SHM) in Aerospace Structures provides readers with the spectacular progress that has taken place over the last twenty years with respect to the area of Structural Health Monitoring (SHM). The widespread adoption of SHM could both significantly improve safety and reduce maintenance and repair expenses that are estimated to be about a quarter of an aircraft fleet’s operating costs. The SHM field encompasses transdisciplinary areas, including smart materials, sensors and actuators, damage diagnosis and prognosis, signal and image processing algorithms, wireless intelligent sensing, data fusion, and energy harvesting. This book focuses on how SHM techniques are applied to aircraft structures with particular emphasis on composite materials, and is divided into four main parts. Part One provides an overview of SHM technologies for damage detection, diagnosis, and prognosis in aerospace structures. Part Two moves on to analyze smart materials for SHM in aerospace structures, such as piezoelectric materials, optical fibers, and flexoelectricity. In addition, this also includes two vibration-based energy harvesting techniques for powering wireless sensors based on piezoelectric electromechanical coupling and diamagnetic levitation. Part Three explores innovative SHM technologies for damage diagnosis in aerospace structures. Chapters within this section include sparse array imaging techniques and phase array techniques for damage detection. The final section of the volume details innovative SHM technologies for damage prognosis in aerospace structures. This book serves as a key reference for researchers working within this industry, academic, and government research agencies developing new systems for the SHM of aerospace structures and materials scientists. Provides key information on the potential of SHM in reducing maintenance and repair costs Analyzes current SHM technologies and sensing systems, highlighting the innovation in each area Encompasses chapters on smart materials such as electroactive polymers and optical fibers

Alternatives for Landmine Detection

Author : Jacqueline MacDonald Gibson
Publisher : Rand Corporation
ISBN 13 : 9780833033017
Total Pages : 336 pages
Book Rating : 4.0/5 (33 download)

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Book Synopsis Alternatives for Landmine Detection by : Jacqueline MacDonald Gibson

Download or read book Alternatives for Landmine Detection written by Jacqueline MacDonald Gibson and published by Rand Corporation. This book was released on 2003 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: At the rate that government and nongovernmental organizations are clearing existing landmines, it will take 450-500 years to rid the world of them. Concerned about the slow pace of demining, the Office of Science and Technology asked RAND to assess potential innovative technologies being explored and to project what funding would be required to foster the development of the more promising ones. The authors of this report suggest that the federal government undertake a research and development effort to develop a multisensor mine detection system over the next five to eight years.

Ageing Management of Concrete Structures in Nuclear Power Plants

Author : International Atomic Energy Agency
Publisher : IAEA Nuclear Energy
ISBN 13 : 9789201029140
Total Pages : 0 pages
Book Rating : 4.0/5 (291 download)

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Book Synopsis Ageing Management of Concrete Structures in Nuclear Power Plants by : International Atomic Energy Agency

Download or read book Ageing Management of Concrete Structures in Nuclear Power Plants written by International Atomic Energy Agency and published by IAEA Nuclear Energy. This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication is one in a series of reports on the assessment and management of ageing of major nuclear power plant (NPP) components. Current practices for assessment of safety margins (fitness for service) and inspection, monitoring and mitigation of ageing related degradation of selected concrete structures related to NPPs are documented. Implications for and differences in new reactor designs are discussed. This information is intended to help all involved directly and indirectly in ensuring the safe operation of NPPs, and also to provide a common technical basis for dialogue between plant operators and regulators when dealing with age related licensing issues.

Advances in Micro and Nano Manufacturing and Surface Engineering

Author : M. S. Shunmugam
Publisher : Springer Nature
ISBN 13 : 9813294256
Total Pages : 720 pages
Book Rating : 4.8/5 (132 download)

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Book Synopsis Advances in Micro and Nano Manufacturing and Surface Engineering by : M. S. Shunmugam

Download or read book Advances in Micro and Nano Manufacturing and Surface Engineering written by M. S. Shunmugam and published by Springer Nature. This book was released on 2019-11-30 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents research papers on micro and nano manufacturing and surface engineering which were presented during the 7th International and 28th All India Manufacturing Technology, Design and Research conference 2018 (AIMTDR 2018). The papers discuss the latest advances in miniature manufacturing, the machining of miniature components and features as well as improvement of surface properties. This volume will be of interest to academicians, researchers, and practicing engineers alike.