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A comparative study of digital image correlation and fiber Bragg grating sensors based on strain measurements

A comparative study of digital image correlation and fiber Bragg grating sensors based on strain... Fiber Bragg grating (FBG) sensors are gaining prominence as contact sensors to find the field of displacement and strain measurements in recent times for structural health monitoring (SHM) applications, whereas digital image correlation (DIC) is a proven and widely used non-contact optical measurement method for finding displacement and strains developed on the surface of an object. For dynamic bridge monitoring, a prototype of a circular accelerated pavement testing track (APT) is constructed and results obtained from both the methods are compared. For DIC measurements, a random speckle pattern on the APT was utilized as a non-contact sensor, while FBGs were connected as contact sensors in the tension portion of the APT, exactly beneath the region of random speckle patterns for measurements and comparison. The experimental results demonstrated that the strain sensitivity of FBG measurements is quite high compared to DIC values. However, there was a very good agreement between the normalized principal strain values obtained from both the methods. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Innovative Infrastructure Solutions Springer Journals

A comparative study of digital image correlation and fiber Bragg grating sensors based on strain measurements

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References (36)

Publisher
Springer Journals
Copyright
Copyright © Springer Nature Switzerland AG 2022
ISSN
2364-4176
eISSN
2364-4184
DOI
10.1007/s41062-022-00768-1
Publisher site
See Article on Publisher Site

Abstract

Fiber Bragg grating (FBG) sensors are gaining prominence as contact sensors to find the field of displacement and strain measurements in recent times for structural health monitoring (SHM) applications, whereas digital image correlation (DIC) is a proven and widely used non-contact optical measurement method for finding displacement and strains developed on the surface of an object. For dynamic bridge monitoring, a prototype of a circular accelerated pavement testing track (APT) is constructed and results obtained from both the methods are compared. For DIC measurements, a random speckle pattern on the APT was utilized as a non-contact sensor, while FBGs were connected as contact sensors in the tension portion of the APT, exactly beneath the region of random speckle patterns for measurements and comparison. The experimental results demonstrated that the strain sensitivity of FBG measurements is quite high compared to DIC values. However, there was a very good agreement between the normalized principal strain values obtained from both the methods.

Journal

Innovative Infrastructure SolutionsSpringer Journals

Published: Apr 1, 2022

Keywords: Speckle pattern; Digital image correlation (DIC); Fiber Bragg grating (FBG) sensors; Accelerated pavement track (APT); Dynamic monitoring; Strain

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