基于窄角扇束扫描的固体火箭发动机CT图像重建  

CT image reconstruction of solid rocket motor based on narrow fan beam scan

作　　者：陈庆贵[1] 刘赵云[2] 卢洪义[1] 李朋[1] 李慎[3] 

机构地区：[1]海军航空工程学院 [2]海军驻航天三院军事代表室 [3]91206部队

出　　处：《固体火箭技术》2014年第6期877-880,共4页Journal of Solid Rocket Technology

摘　　要：为实现窄角扇束扫描方式下的CT图像重建,结合窄角扇束扫描方式的特点,对已有的重排算法进行了改进,加入了数据对齐环节,实现了窄角扇束扫描投影数据的同步性。为验证改进的重排算法的有效性,利用窄角扇束工业CT对某型固体火箭发动机进行CT检测,并分别用改进前后的重排算法对获得的投影数据进行重建。结果表明,改进后的重排算法重建的图像能够很好地反映固体火箭发动机的内部结构,对固体火箭发动机的无损探伤和寿命预估具有重要意义。To reconstruct computed tomography （ CT） image for narrow fan beam scan, the existing rebinning algorithm was improved considering the characteristic of narrow fan beam scan mode. The process of data shake-up was introduced and synchronic-ity of narrow fan beam projection data was realized. To test the effectiveness of the improved rebinning algorithm, one solid rocket motor（ SRM） was tested by using narrow fan beam industrial CT. Existing and improved rebinning algorithms were used to recon-struct collected projection data. Results show that the improved rebinning algorithm reconstructs the inner structure of SRM well. This is of great significance to nondestructive testing and life prediction of SRM.

关 键 词：窄角扇束投影 固体火箭发动机 重排 数据对齐 滤波反投影 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]