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dc.contributor.authorPan, Bing
dc.contributor.authorShi, Wentao
dc.contributor.authorLubineau, Gilles
dc.date.accessioned2016-02-03T10:24:58Z
dc.date.available2016-02-03T10:24:58Z
dc.date.issued2015-11-25
dc.identifier.citationEffect of camera temperature variations on stereo-digital image correlation measurements 2015, 54 (34):10089 Applied Optics
dc.identifier.issn0003-6935
dc.identifier.issn1539-4522
dc.identifier.doi10.1364/AO.54.010089
dc.identifier.urihttp://hdl.handle.net/10754/595515
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.
dc.language.isoen
dc.publisherThe Optical Society
dc.relation.urlhttps://www.osapublishing.org/abstract.cfm?URI=ao-54-34-10089
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.
dc.titleEffect of camera temperature variations on stereo-digital image correlation measurements
dc.typeArticle
dc.contributor.departmentComposite and Heterogeneous Material Analysis and Simulation Laboratory (COHMAS)
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalApplied Optics
dc.eprint.versionPost-print
dc.contributor.institutionInstitute of Solid Mechanics, Beihang University, Beijing 100191, China
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personLubineau, Gilles
refterms.dateFOA2016-11-25T00:00:00Z
dc.date.published-online2015-11-25
dc.date.published-print2015-12-01


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