Journal ArticleDOI
Soil deformation measurement using particle image velocimetry (PIV) and photogrammetry
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A deformation measurement system based on particle image velocimetry (PIV) and close-range photogrammetry has been developed for use in geotechnical testing as mentioned in this paper.Abstract:
A deformation measurement system based on particle image velocimetry (PIV) and close-range photogrammetry has been developed for use in geotechnical testing. In this paper, the theory underlying this system is described, and the performance is validated. Digital photography is used to capture images of planar soil deformation. Using PIV, the movement of a fine mesh of soil patches is measured to a high precision. Since PIV operates on the image texture, intrusive target markers need not be installed in the observed soil. The resulting displacement vectors are converted from image space to object space using a photogrammetric transformation. A series of validation experiments are reported. These demonstrate that the precision, accuracy and resolution of the system are an order of magnitude higher than previous image-based deformation methods, and are comparable to local instrumentation used in element testing. This performance is achieved concurrent with an order of magnitude increase in the number of meas...read more
Citations
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Journal ArticleDOI
Non-contact sensing system to measure specimen volume during shrinkage test
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Journal ArticleDOI
Stability of Volcanic Slopes in Cold Regions
Shima Kawamura,Seiichi Miura +1 more
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Experimental investigation on cohesionless sandy bank failure resulting from water level rising
TL;DR: In this paper, a series of experiments were done in a soil tank using a compacted sandy soil mass exposed to an increasing water level, where two types of uniform sand (D 50 = 0.40mm and 0.17mm) and two bank heights were used under the condition of a constant bank slope of 75°.
Journal ArticleDOI
Digital Image Correlation Technique for Measurement of Surface Strains in Reinforced Asphalt Concrete Beams under Fatigue Loading
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DissertationDOI
Experiments in tunnel-soil-structure interaction
TL;DR: In this article, the impact of structural features on both the soil and building response to tunnelling in dense sand was investigated, and the authors demonstrated that the presence of surface structures considerably altered the tunnel-induced soil response.
References
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Journal ArticleDOI
Particle-Imaging Techniques for Experimental Fluid Mechanics
TL;DR: A review of these methods can be found in articles by Lauterborn & Vogel (1984), Adrian (1986a), Hesselink (1988), and Dudderar et al..
Proceedings ArticleDOI
A four-step camera calibration procedure with implicit image correction
Janne Heikkilä,Olli Silven +1 more
TL;DR: This paper presents a four-step calibration procedure that is an extension to the two-step method, and a linear method for solving the parameters of the inverse model is presented.
Proceedings ArticleDOI
Calibration procedure for short focal length off-the-shelf CCD cameras
Janne Heikkilä,Olli Silven +1 more
TL;DR: A camera calibration procedure intended for a 3D measurement application is presented, paying attention to the various error sources, and notices that a more complete camera model is needed to explain all the error components.
Journal ArticleDOI
A review of instrumentation for measuring small strains during triaxial testing of soil specimens
TL;DR: In this article, the authors present a survey of small-strain measuring devices and their modes of operation, benefits, capabilities, and limitations, as well as a classification of internal and external measuring devices.