含能材料密度的XCT自参照测试  

Self-Comparison Based X-Ray Computed Tomography for Measuring Narrow Densities of Energy Material

作　　者：杨雪海[1] 张伟斌[1] 戴斌[1] 田勇[1] 

机构地区：[1]中国工程物理研究院化工材料研究所,绵阳621900

出　　处：《无损检测》2010年第6期431-433,共3页Nondestructive Testing

基　　金：中国工程物理研究院重大基金资助项目(2005Z0504);学科发展基金资助项目(2007A03001)

摘　　要：运用同步测试技术和体积CT灰度值计算方法,研究含能材料的体密度与体积CT灰度值的线性关系。以密度相近的含能材料试验件组成的体系密度作为参照,利用各试验件的VCT灰度值计算CT密度值。试验结果表明,采用自参照密度测试方法可以简化含能材料局部密度均匀性的测试,CT法计算获得的试验件密度值与排水法测得密度值的相对误差<0.1%。A method, based on micro focus cone beam X-ray computed tomography, for measuring lower-range density of energy material cylinders was introduced. The linear relationship between energy material volume density and volume CT gray value was obtained through synchronized detection and VCT gray value calculating. Each specimen＇s CT density was calculated from VCT gray value based on the whole specimens＇ drainage density. The result showed that the self-comparison method could simplify the measuring local-density uniformity of energy material, and the relative error between drainage density and VCT density of each specimen was less than 0. 1%.

关 键 词：XCT 含能材料 密度 自参照 

分 类 号：TG115.28[金属学及工艺—物理冶金]