Results 11 to 20 of about 3,633,666 (147)

Development of shearography for surface strain measurement of non-planar objects [PDF]

open access: yes, 2001
The subject of this thesis is the development of optical instrumentation for surface strain measurement of non-planar objects. The speckle interferometry technique of shearography is used to perform quantitative measurements of surface strain on ...
Groves, Roger Michael, Groves, Roger M.
core   +7 more sources

Surface strain measurement using pulsed laser shearography with fibre-optic imaging bundles [PDF]

open access: yes, 2008
This thesis describes the development of a shearography instrument for the quantitative measurement of surface strain on dynamic test objects. Shearography is a non-contact, full-field interferometric speckle technique used for the measurement of ...
Francis, Daniel
core   +7 more sources

Assessment of Fiber Bragg Grating Sensors for Monitoring Shaft Vibrations of Hydraulic Turbines

open access: yesSensors, 2023
The structural dynamic response of hydraulic turbines needs to be continuously monitored to predict incipient failures and avoid catastrophic breakdowns.
Xavier Sánchez-Botello   +5 more
doaj   +1 more source

A novel vision-based system for quantitative analysis of abdominal aortic aneurysm deformation

open access: yesBioMedical Engineering OnLine, 2019
Background In clinical diagnostics, combination of different imaging techniques is applied to assess spatial configuration of the abdominal aortic aneurysm (AAA) and deformation of its wall.
Andrzej Polanczyk   +5 more
doaj   +1 more source

Dynamic Distributed Brillouin Optical Fiber Sensing Based on Dual-Modulation by Combining Single Frequency Modulation and Frequency-Agility Modulation

open access: yesIEEE Photonics Journal, 2017
Dynamic Brillouin optical fiber sensors based on fast scanning of Brillouin gain spectrum (BGS) are one of the most promising techniques to measure dynamic strains, where an ∼11-GHz bandwidth arbitrary waveform generator (AWG) or a vector ...
Dexin Ba   +6 more
doaj   +1 more source

Long-Sensing-Length Strain Sensor Based on Optical Fiber Fabry-Perot Interferometer With HCF-SMF Structure

open access: yesIEEE Photonics Journal, 2019
We proposed and demonstrated an optical fiber Fabry-Perot (F-P) sensor with long sensing length for strain measurement. The structure of the sensor was fabricated with a simple process by splicing a long single mode fiber (SMF) with a short section of ...
Zhichao Lv   +7 more
doaj   +1 more source

Uncertainty Analysis of an Optoelectronic Strain Measurement System for Flywheel Rotors

open access: yesSensors, 2021
The strain in a fast spinning carbon fiber flywheel rotor is of great interest for condition monitoring, as well as for studying long-term aging effects in the carbon fiber matrix.
Matthias Franz Rath   +2 more
doaj   +1 more source

Sensor for Measuring Strain in Textile [PDF]

open access: yesSensors, 2008
In this paper a stain sensor to measure large strain (80%) in textiles is presented. It consists of a mixture of 50wt-% thermoplastic elastomer (TPE) and 50wt-% carbon black particles and is fiber-shaped with a diameter of 0.315mm. The attachment of the sensor to the textile is realized using a silicone film. This sensor configuration was characterized
Mattmann, Corinne   +2 more
openaire   +6 more sources

Measurement of Internal Strain in Materials Using High Energy Synchrotron Radiation White X-Rays [PDF]

open access: yes, 2007
This paper presents a basic research on a measurement of strain in the bulk of materials by using high energy white X-rays from a synchrotron radiation source of Spring-8, WEL-TEN780E(JIS G3128 SHY685) whose grain size was 13μm was used as a specimen ...
鈴木, 賢治   +5 more
core   +1 more source

Measuring strain in sheet metals [PDF]

open access: yesFME Transactions, 2019
A sensitive and precise experimental system able to time-track the static and dynamic response of steel sheets to intense loads is hereby described. This methodological article is based on a specific investigation carried out in order to verify the correct functioning and safety conditions of a large sheet metal structure.
Braut S., Pavlovic A., Beno P., Babic M.
openaire   +6 more sources

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