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为了改善膏体材料压缩性能试验传统变形测量方法的弊端,基于变形性能试验在预测膏体充填材料密实性和强度控制地基沉陷程度上的重要性,提出了一种研究膏体充填材料单轴抗压强度和变形性能的数字图像测量技术,利用数字图像原理测量膏体试件在压缩过程中的变形参数,主要包括图像的采集、灰度化、二值化、边缘识别及轮廓提取等,目的在于不扰动试件和变形,保证实验精度的前提下,实现对膏体试件横、纵向变形的同步直接测量,同时研究了该项技术中存在的问题及误差修正方法,并对测量精度进行了分析,最后通过实例证明了该技术的可行性与正确性。
In order to improve the shortcomings of the traditional method of deformation measurement of the compression performance of the paste material, based on the importance of the deformation performance test in predicting the density of the paste filling material and the degree of strength control of the subsidence, a new method to study the uniaxial resistance of the paste filling material Pressure intensity and deformation performance of digital image measurement technology, the use of digital image principle measurement of the deformation parameters of the paste specimen in the compression process, including image acquisition, grayscale, binary, edge recognition and contour extraction purposes Under the premise of not disturbing the specimen and deformation and guaranteeing the experimental precision, simultaneous and direct measurement of the horizontal and vertical deformation of the paste specimen can be realized. At the same time, the existing problems in the technology and the error correction method are studied, Analyzed, and finally proved the feasibility and correctness of the technology through examples.