固体推进剂SEM图像分形维数研究  

Study on fractal dimension of SEM images of solid propellant

作　　者：杨秋秋 徐胜良[1,2] 强福智 蔡如琳[1,2] Yang Qiuqiu;Xu Shengliang;Qiang Fuzhi;Cai Rulin(Science and Technology on Areospace Chemical Power Laboratray,Xiangyang 441003,China;Hubei Institute of Aerospace Chemotechnology,Xiangyang 441003,China)

机构地区：[1]航天化学动力技术重点实验室,湖北襄阳441003 [2]湖北航天化学技术研究所,湖北襄阳441003

出　　处：《化学推进剂与高分子材料》2021年第1期63-67,共5页Chemical Propellants & Polymeric Materials

摘　　要：以GAP(缩水甘油叠氮聚合物)、NEPE(硝酸酯增塑聚醚)和HTPB(端羟基聚丁二烯)推进剂为研究对象,对3种推进剂的扫描电镜(SEM)图像分形维数进行了研究。利用分形维数对固体推进剂裂纹定量表征以研究推进剂的力学性能,对阈值选取方法进行了分析,结果表明,利用全局阈值分割法选取图像适合的阈值可以对图像进行可靠的分割。固体推进剂SEM图像的放大倍数以及噪声对分形维数会产生影响,放大倍数过大、过小均无法得到可靠的分形维数,3种推进剂选定放大倍数为500较为适宜;在计算分形维数前需对图像进行滤波的降噪处理。Using the GAP(glycidyl azide polymer),NEPE(nitrate ester plasticized polyether)and HTPB(hydroxyl-terminated polybutadiene)propellants as the research objects,the fractal dimensions of the scanning electron microscope(SEM)images of three kinds of propellants were investigated.The crack of the solid propellant was quantitatively characterized by using the fractal dimension to investigate the mechanical performance of the propellant.The selection method of the threshold was analyzed.The results show that the reliable segmentation of the image can be carried out by using the global threshold segmentation method to select the appropriate threshold.The magnification and noise of the SEM images of the solid propellants will affect the fractal dimension,if the magnification is too more or too less,the reliable fractal dimension can not be obtained.For three kinds of propellants,it is suitable to select the magnification of 500.Before calculating the fractal dimension,the noises of the images should be reduced by filtering.

关 键 词：固体推进剂 SEM图像 分形维数 阈值 噪声 

分 类 号：TQ560.72[化学工程—炸药化工] V512[航空宇航科学与技术—航空宇航推进理论与工程]