Ultraviolet 3D digital image correlation applied for deformation measurement in thermal testing with infrared quartz lamps
Sign Up to like & getrecommendations! Published in 2020 at "Chinese Journal of Aeronautics"
DOI: 10.1016/j.cja.2019.03.038
Abstract: Abstract In thermal-structural testing of hypersonic materials and structures, deformation measurement on the front surface of an object directly heated by quartz lamps is highly necessary and very challenging. This work describes a novel front-surface… read more here.
Keywords: quartz lamps; deformation measurement; deformation; ultraviolet digital ... See more keywords
New methods of fabricating gratings for deformation measurements: A review
Sign Up to like & getrecommendations! Published in 2017 at "Optics and Lasers in Engineering"
DOI: 10.1016/j.optlaseng.2016.12.011
Abstract: Abstract Gratings have been widely accepted as practical and effective deformation carriers/sensors and are commonly used in many deformation measurement methods. Since the deformation measurement sensitivity is directly proportional to the grating frequency, and the… read more here.
Keywords: deformation; grating fabrication; deformation measurement; fabrication methods ... See more keywords
Full-field optical deformation measurement and operational modal analysis of a flexible rotor blade
Sign Up to like & getrecommendations! Published in 2019 at "Mechanical Systems and Signal Processing"
DOI: 10.1016/j.ymssp.2019.106265
Abstract: Abstract This study describes the deformation measurement and operational modal analysis (OMA) of an extremely flexible rotor blade in hover. Blade deformation of a 0.45 m-diameter two-bladed rotor was measured at two different root pitch angles… read more here.
Keywords: rotor; measurement operational; rotor blade; deformation measurement ... See more keywords
Digital image correlation with topology-based matching algorithm on dots pattern and its application in large deformation measurement of nitrile–butadiene rubber
Sign Up to like & getrecommendations! Published in 2021 at "Measurement Science and Technology"
DOI: 10.1088/1361-6501/ac0de1
Abstract: Digital image correlation (DIC) has inherent limitations in large deformation measurement, such as speckle pattern decorrelation and high computation time cost. A new dots pattern with fixed size and randomly distributed dots is devised for… read more here.
Keywords: deformation measurement; correlation; topology; deformation ... See more keywords
Refraction error correction for deformation measurement by digital image correlation at elevated temperature
Sign Up to like & getrecommendations! Published in 2017 at "Optical Engineering"
DOI: 10.1117/1.oe.56.3.034106
Abstract: Abstract. An effective correction model is proposed to eliminate the refraction error effect caused by an optical window of a furnace in digital image correlation (DIC) deformation measurement under high-temperature environment. First, a theoretical correction… read more here.
Keywords: temperature; deformation measurement; correction; refraction error ... See more keywords
Precise building deformation measurement using holographic multipoint replication.
Sign Up to like & getrecommendations! Published in 2020 at "Applied optics"
DOI: 10.1364/ao.385594
Abstract: For the active control of large-scale structures, especially high-rise buildings and bridges, fast and accurate measurement of local deformations is required. We present a highly accurate and fast vision-based measurement technique and, to the best… read more here.
Keywords: precise building; deformation measurement; measurement; measurement using ... See more keywords
Parallel optimization of tridimensional deformation measurement based on correlation function constraints of a multi-camera network.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.471747
Abstract: This study primarily investigates the low accuracy and redundant time-consuming problem of speckle registration in the full-field deformation measurement of slender and biggish specimens. To solve these problems, a parallel optimization of the tridimensional deformation… read more here.
Keywords: correlation function; deformation measurement; deformation;
Accurate dynamic 3D deformation measurement based on the synchronous multiplexing of polarization and speckle metrology.
Sign Up to like & getrecommendations! Published in 2023 at "Optics letters"
DOI: 10.1364/ol.485969
Abstract: An accurate dynamic 3D deformation measurement method realized by the combination of phase-shifting speckle interferometry and speckle correlation is proposed. By converting the speckle field and the reference field into a circular polarized and linear… read more here.
Keywords: deformation; dynamic deformation; metrology; deformation measurement ... See more keywords