Spatial-Gradient-Based Digital Volume Correlation Technique for Internal Deformation Measurement

Bing, 潘兵 Pan; Dafang, 吴大方 Wu; Huimin, 谢惠民 Xie; Zhenxing, 胡振兴 Hu

doi:10.3788/aos201131.0612005

Cited by 7 publications

(3 citation statements)

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“…During the CT volumetric imaging process, the grayscale of each voxel in the post-deformation volume image will inevitably change. The calculation of residual grayscale fields needs to be considered and corrected for the influence of changes in grayscale in the target volume image [30]. However, for cases of complex and large deformations, it can be challenging to accurately obtain the displacement field in regions with complex and large deformations through image matching algorithms.…”

Section: Fig 2 Two Typical Dvc Calculation Strategiesmentioning

confidence: 99%

Reconstruction of the environment quality on “Chaotic Space”: Case study of Chaonan District, Shantou City, China

Li¹,

Zhou²

2017

Smart Constr Res

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It is often the case that strong bottom-up power in the Desakota area (half-urbanized) leads to mixed functional space and poor quality of spatial environment. During this process, urban planning does not work. This study aims to report the reconstruction of the environment quality starting from the logic of space production, and analyze the “chaotic space” in the Desakota area. Key systematic thinking of spatial amelioration which is “dynamic planning framework and flexible smart design” based on Desakota “chaotic space” is explored.

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Section: Fig 2 Two Typical Dvc Calculation Strategiesmentioning

confidence: 99%

Reconstruction of the environment quality on “Chaotic Space”: Case study of Chaonan District, Shantou City, China

Li¹,

Zhou²

2017

Smart Constr Res

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“…Δu and Δv are sub-pixel displacements. When the image area is small enough, its motion is similar to the motion of a rigid body in the plane: [20]…”

Section: Principle Of Torque Measurementmentioning

confidence: 99%

Measurement of short shaft power based on a digital speckle correlation method

Geng

Zhao

et al. 2015

Meas. Sci. Technol.

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This paper proposes a new method of using a camera to monitor changes in short shaft power. First, the camera is used to collect a sequence of images of the shaft surface without torque in advance as reference images. Then strain patterns of the shaft surface under the action of torque are collected and displacements between two adjacent frames are calculated to get the rotation speed by a digital speckle correlation method; a gradient algorithm is used to measure sub-pixel displacements between two ends of the strain images, and the torque is obtained. Finally, shaft power is obtained from rotational speed and torque. To verify the accuracy of measurement, bench experiments using different rotational speeds and torques are done, which are compared with standard sensor measurement. The measurement errors of speed, torque and shaft power are 0.1%–0.11%, 7.79%–10.91% and 7.7%–10.82%, respectively. Results show that the measurement system of shaft power based on a digital industrial camera has high precision. In comparison to the state-of-the-art methods, the proposed method has overcome the shortcomings of traditional methods whose installation is complex and whose signals easily interfere. It is characterized by simple construction, and applied to monitor dynamic short shaft power online.

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“…There is one of the DIPT called Digital Image Correlation Method (DICM), which is promoted by Peters and Ranson [4] in the early 1980s. This method is able to calculate the distortion of the analyte according to the images before and after deformation, which is a simple and convenient analysis method with fair precision [5]. Because of its strong suit, DICM is also widely used to study the performance of asphalt mixtures.…”

Section: Introductionmentioning

confidence: 99%

Deformation Analysis of Asphalt Mixtures with Digital Image Correlation Method

Wang

Jia³

et al. 2013

AMR

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Based on digital image correlation method (DICM), this paper promotes a new method for tracking the movements of coarse aggregates of asphalt mixtures. The four-point bending fatigue test is applied as the observed test. The fatigue damage process of AC-16 asphalt mixture is observed by CCD camera. Results show that the new method is able to well reflect the exact displacement of coarse aggregates under different loading repetitions. And the movement trends also reflect the influences of cracks in the specimens. Compared to the original method, the new method provides more detail movement information of different materials (aggregates and asphalt binder). This method helps to the research of asphalt mixtures in meso-scale.

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Spatial-Gradient-Based Digital Volume Correlation Technique for Internal Deformation Measurement

Cited by 7 publications

References 0 publications

Reconstruction of the environment quality on “Chaotic Space”: Case study of Chaonan District, Shantou City, China

Reconstruction of the environment quality on “Chaotic Space”: Case study of Chaonan District, Shantou City, China

Measurement of short shaft power based on a digital speckle correlation method

Deformation Analysis of Asphalt Mixtures with Digital Image Correlation Method

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