DSCM analyzing method based on geotechnical material deformation space-time non-uniform characteristics

A technology of geotechnical materials and analysis methods, applied in image analysis, image data processing, instruments, etc., can solve problems such as reducing analysis accuracy, and achieve the effects of improving calculation accuracy, improving measurement accuracy, and eliminating errors

Active Publication Date: 2017-10-24
CHINA UNIV OF MINING & TECH
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Problems solved by technology

However, this method adopts the weighted calculation method of dividing sub-regions to predict, and there are certain errors in the application of geot

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  • DSCM analyzing method based on geotechnical material deformation space-time non-uniform characteristics
  • DSCM analyzing method based on geotechnical material deformation space-time non-uniform characteristics
  • DSCM analyzing method based on geotechnical material deformation space-time non-uniform characteristics

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Embodiment

[0028]The basic process of embodiment application PDSS method of the present invention is divided into following 8 steps:

[0029] (1) In the sequence of images to be analyzed, select an image measuring point range larger than the subsequent actual analysis on the first image, and then select a larger pixel measuring point spacing to divide the initial grid measuring points, so as to Reduce image analysis time for grid points. In this embodiment, the pixel measuring point spacing of the rock, sandy soil and similar material reference grid is selected as 25, 45, and 50 pixels respectively. pixels and 7 pixels, the measuring point spacing of 5000 measuring points and 10000 measuring points analysis of sandy soil materials is 19 pixels and 13 pixels respectively, and the measuring point spacing of 5000 measuring points and 10000 measuring points analysis of similar materials is 20 pixels and 14 pixels respectively.

[0030] (2) In the digital speckle correlation analysis of the ...

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Abstract

The invention discloses a DSCM analyzing method based on geotechnical material deformation space-time non-uniform characteristics. Image analyzing efficiency is improved by dynamically adjusting a searching range of pixel measuring points. Based on the geotechnical material deformation space-time non-uniform characteristics, the searching range of all of the pixel measuring points in the image is determined according to analyzing results of reference grids. The DSCM analyzing method is realized in software by adopting a programming technology, and is suitable for the digital speckle correlation analysis of the geotechnical materials of various types, and a number of pixel points of image correlation analysis is greatly reduced, and therefore the image analysis speed of the digital speckle correlation method is effectively accelerated. By combining with the precision optimization method of the digital speckle correlation analysis considering rock fracture influences, the image analyzing speed is accelerated at the same time of improving calculation precision. Measuring point displacement analysis errors or mistakes caused by image noises are effectively inhibited, and therefore the digital speckle correlation measurement precision of the geotechnical material deformation is improved.

Description

technical field [0001] The invention relates to a digital speckle correlation analysis method, in particular to a digital speckle correlation analysis method which improves image analysis efficiency by dynamically adjusting the search range of pixel measuring points based on the spatiotemporal non-uniform characteristics of rock and soil material deformation. Background technique [0002] The digital speckle correlation method (DSCM for short) is a method that uses digital cameras or CCD cameras as digital image acquisition devices, and uses digital image processing and analysis technology to calculate and track the geometric points of digital speckle images in different stages. A measurement method for displacement measurement and deformation analysis. As an optical measurement method, DSCM has the characteristics of full-field, non-contact and high precision. It is suitable for visual measurement of the deformation process of geotechnical materials, and has a common and un...

Claims

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Application Information

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IPC IPC(8): G06T7/00
CPCG06T7/0002G06T2207/30132
Inventor 李元海吴玲唐晓杰陈佳玮杨硕
Owner CHINA UNIV OF MINING & TECH
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