CAJ | 학술논문

针对 CT 图像的特点,分别从像素与体素两种尺度定义了表面孔隙率与体孔隙率.利用数字地形模型方法计算表面孔隙率,给出了基于工业 CT 灰度图像体孔隙率的计算方法.对煤样单轴加载下不同阶段的 CT 图像进行分析,获得了煤样表面孔隙率与体孔隙率随应力变化关系曲线.两种孔隙率都能较好地反映煤样内部损伤变化,表面孔隙率反映的是像素级的孔隙,体孔隙率反映了像素内部的孔隙,更能体现 CT 图像的特点.
침대 CT 도상적특점,분별종상소여체소량충척도정의료표면공극솔여체공극솔.이용수자지형모형방법계산표면공극솔,급출료기우공업 CT 회도도상체공극솔적계산방법.대매양단축가재하불동계단적 CT 도상진행분석,획득료매양표면공극솔여체공극솔수응력변화관계곡선.량충공극솔도능교호지반영매양내부손상변화,표면공극솔반영적시상소급적공극,체공극솔반영료상소내부적공극,경능체현 CT 도상적특점.
@@@@According to the characteristics of CT images, the surface porosity and voxel porosity are defined in pixel and voxel scales respectively. The Digital Terrain Model (DTM) method is applied to calculate the surface porosity, and the method for calculating voxel porosity is also developed based on industrial CT grey images. In a case study, using the proposed methods, the CT coal images under different uniaxial loadings are analyzed, and the relation curves between two types of porosities and its stress are separately obtained. All of these porosities sufficiently reflect the inner damage in coal samples. The surface porosity shows the surface pore in pixel scale while the voxel porosity reflects the inner pore in pixel scale. The voxel porosity describes well the characteristics of CT coal images.