CAJ | 학술논문

为了实现对密度高且变化范围大的材料进行密度定量测量,建立自动密度测量系统,对工业材料的密度与CT数的关系进行研究.根据工业CT检测工件常见密度,选取有代表性的几种均匀材料作为标件,并以铝材料作为参考标准件.通过CT扫描获取不同密度标件对应的CT数.选用一幅CT图像为标定图像,以该图像中空气的CT数为标准,对被测材料的CT数进行修正.采用最小二乘法拟合材料密度与CT数的关系式.实验对塑料、橡胶、玻璃、钛合金、钢、铜等材料的密度进行测试,测量精度小于1%.测量结果基本满足工业材料密度的精度要求.
위료실현대밀도고차변화범위대적재료진행밀도정량측량,건립자동밀도측량계통,대공업재료적밀도여CT수적관계진행연구.근거공업CT검측공건상견밀도,선취유대표성적궤충균균재료작위표건,병이려재료작위삼고표준건.통과CT소묘획취불동밀도표건대응적CT수.선용일폭CT도상위표정도상,이해도상중공기적CT수위표준,대피측재료적CT수진행수정.채용최소이승법의합재료밀도여CT수적관계식.실험대소료、상효、파리、태합금、강、동등재료적밀도진행측시,측량정도소우1%.측량결과기본만족공업재료밀도적정도요구.
In order to realize density quantitative measurement for high-density and great varying range materials, an automatic density measurement system is established and the relationship between the density and CT number of industrial materials is in-vestigated. According to the common density of detected work-piece in ICT, a few representative kinds of uniform material are chosen as the standard work-pieces and aluminum material is as a standard reference.It is based on CT scanning to gain the CT number with different density standard work-pieces.The CT number of air in the standard image,chosen from all,is as the refer-ence standards for correcting the CT number of detected material.Using the least square method fits the formula between the ma-terial density and the CT number.An experiment to detect the density of plastics,rubber,glass,titanium alloy,steel and copper,the measuring accuracy can be reached 1%.It can satisfy the industry requirements of precision.