Effect of camera temperature variations on stereo-digital image correlation measurements

Handle URI:
http://hdl.handle.net/10754/595515
Title:
Effect of camera temperature variations on stereo-digital image correlation measurements
Authors:
Pan, Bing; Shi, Wentao; Lubineau, Gilles ( 0000-0002-7370-6093 )
Abstract:
In laboratory and especially non-laboratory stereo-digital image correlation (stereo-DIC) applications, the extrinsic and intrinsic parameters of the cameras used in the system may change slightly due to the camera warm-up effect and possible variations in ambient temperature. Because these camera parameters are generally calibrated once prior to measurements and considered to be unaltered during the whole measurement period, the changes in these parameters unavoidably induce displacement/strain errors. In this study, the effect of temperature variations on stereo-DIC measurements is investigated experimentally. To quantify the errors associated with camera or ambient temperature changes, surface displacements and strains of a stationary optical quartz glass plate with near-zero thermal expansion were continuously measured using a regular stereo-DIC system. The results confirm that (1) temperature variations in the cameras and ambient environment have a considerable influence on the displacements and strains measured by stereo-DIC due to the slightly altered extrinsic and intrinsic camera parameters; and (2) the corresponding displacement and strain errors correlate with temperature changes. For the specific stereo-DIC configuration used in this work, the temperature-induced strain errors were estimated to be approximately 30–50 με/°C. To minimize the adverse effect of camera temperature variations on stereo-DIC measurements, two simple but effective solutions are suggested.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; COHMAS Laboratory
Citation:
Effect of camera temperature variations on stereo-digital image correlation measurements 2015, 54 (34):10089 Applied Optics
Publisher:
The Optical Society
Journal:
Applied Optics
Issue Date:
25-Nov-2015
DOI:
10.1364/AO.54.010089
Type:
Article
ISSN:
0003-6935; 1539-4522
Additional Links:
https://www.osapublishing.org/abstract.cfm?URI=ao-54-34-10089
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorPan, Bingen
dc.contributor.authorShi, Wentaoen
dc.contributor.authorLubineau, Gillesen
dc.date.accessioned2016-02-03T10:24:58Zen
dc.date.available2016-02-03T10:24:58Zen
dc.date.issued2015-11-25en
dc.identifier.citationEffect of camera temperature variations on stereo-digital image correlation measurements 2015, 54 (34):10089 Applied Opticsen
dc.identifier.issn0003-6935en
dc.identifier.issn1539-4522en
dc.identifier.doi10.1364/AO.54.010089en
dc.identifier.urihttp://hdl.handle.net/10754/595515en
dc.description.abstractIn laboratory and especially non-laboratory stereo-digital image correlation (stereo-DIC) applications, the extrinsic and intrinsic parameters of the cameras used in the system may change slightly due to the camera warm-up effect and possible variations in ambient temperature. Because these camera parameters are generally calibrated once prior to measurements and considered to be unaltered during the whole measurement period, the changes in these parameters unavoidably induce displacement/strain errors. In this study, the effect of temperature variations on stereo-DIC measurements is investigated experimentally. To quantify the errors associated with camera or ambient temperature changes, surface displacements and strains of a stationary optical quartz glass plate with near-zero thermal expansion were continuously measured using a regular stereo-DIC system. The results confirm that (1) temperature variations in the cameras and ambient environment have a considerable influence on the displacements and strains measured by stereo-DIC due to the slightly altered extrinsic and intrinsic camera parameters; and (2) the corresponding displacement and strain errors correlate with temperature changes. For the specific stereo-DIC configuration used in this work, the temperature-induced strain errors were estimated to be approximately 30–50 με/°C. To minimize the adverse effect of camera temperature variations on stereo-DIC measurements, two simple but effective solutions are suggested.en
dc.language.isoenen
dc.publisherThe Optical Societyen
dc.relation.urlhttps://www.osapublishing.org/abstract.cfm?URI=ao-54-34-10089en
dc.rightsThis paper was published in Applied Optics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: https://www.osapublishing.org/abstract.cfm?URI=ao-54-34-10089. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.en
dc.titleEffect of camera temperature variations on stereo-digital image correlation measurementsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentCOHMAS Laboratoryen
dc.identifier.journalApplied Opticsen
dc.eprint.versionPost-printen
dc.contributor.institutionInstitute of Solid Mechanics, Beihang University, Beijing 100191, Chinaen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorLubineau, Gillesen
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