Results 11 to 20 of about 602,214 (264)

Optical Frequency Domain Reflectometry Based on Multilayer Perceptron

open access: yesSensors, 2023
We proposed an optical frequency domain reflectometry based on a multilayer perceptron. A classification multilayer perceptron was applied to train and grasp the fingerprint features of Rayleigh scattering spectrum in the optical fiber.
Guolu Yin   +6 more
doaj   +1 more source

Strain Measurements in Free Tube Hydroforming Process [PDF]

open access: yesArchives of Metallurgy and Materials, 2020
The paper presents a method of measuring deformations of cylindrical samples on the testing machine for free tube hydroforming experiments. During experiments a sample made of a thin-walled metal tube is expanded by the internal pressure of the working ...
H. Sadłowska   +2 more
doaj   +1 more source

Atmospheric Corrosion Sensor Based on Strain Measurement with Active–Dummy Fiber Bragg Grating Sensors

open access: yesMetals, 2020
Using the relationship between strain and thickness from the materials theory, this paper presents further development of the atmospheric corrosion sensor based on strain measurement (ACSSM).
Nining Purwasih   +5 more
doaj   +1 more source

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

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   +5 more sources

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

Measurement of Visual Strain in Radiologists [PDF]

open access: yesAcademic Radiology, 2009
The authors hypothesized that the current practice of radiology produces oculomotor fatigue that reduces diagnostic accuracy.Testing this hypothesis required an ability to measure eyestrain. This capability was developed by measuring the visual accommodation of radiologists before and after diagnostic viewing work using an autorefractor that was ...
Elizabeth A, Krupinski, Kevin S, Berbaum
openaire   +2 more sources

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

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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