散射法测量管道油垢厚度的进一步研究  

MC simulation for measuring grease stain thickness in pipelines using scattering method

作　　者：时飞跃[1] 杨惠玲[2] 马加一[1] 赵经武[1] 阿不列木·艾尔肯[3] 杨坤杰[3] 赵农校[3] 刘圣康[1] 

机构地区：[1]南京大学物理学系,南京210093 [2]新疆师范大学数理信息学院,乌鲁木齐830054 [3]新疆大学物理科学与技术学院,乌鲁木齐830046

出　　处：《核技术》2009年第5期347-350,共4页Nuclear Techniques

基　　金：国家自然科学基金(10565003)资助

摘　　要：用Monte-Carlo方法模拟计算了有、无保温层时输油管道不同油垢厚度d的散射γ射线计数,建立了计数与油垢厚度的响应关系。结果表明,计数随d增加而增长,呈指数曲线形状;通过增大源管距t或增大源距h,可探测的最大油垢厚度dM会增加;有保温层时的dM值小于无保温层时的值。此方法能实现对输油管道油垢厚度的无损检测。For designing a nondestructive detection system to measure grease stain thickness in pipelines by using γ-ray scattering method, Monte-Carlo simulations were carried out for a pipeline with and without thermal insulation layer （TIL）. Response curves of the scattered γ-ray counts from the grease stain thicknesses （d） were obtained, under different source-pipe distances （t） and source-detector distances （h）. It was found that the count varied with d in exponential curves. The maximum detectable thickness of the grease stain （dM） became larger with increasing t or h, and the dM with TIL was smaller than that without TIL. The results are of help for performing nondestructive measurement of the grease stain thickness in pipelines.

关 键 词：Γ射线 散射 油垢厚度 Monte—Carlo模拟 探测计数 屏蔽 

分 类 号：O571.323[理学—粒子物理与原子核物理]