摘要
对由固体发动机工业CT断层图像构成的体数据重建出的三维模型进行虚拟剖切,可方便地看到其内部的组成、结构,便于检测人员观察和判断内部故障的种类和性质。首先,针对固体发动机体数据场中体素的特点,将体数据场的分割结果和分层体数据结构结合,改进了现有的光线投射加速体绘制方法,实现了三维模型的快速体绘制;在此基础上,将人机交互技术应用到虚拟剖切算法中,实现三维模型任意位置、任意角度的平面剖切和体剖切;最后,设计出基于特征点拾取的空间参数测量方法,实现剖切后发动机结构空间距离、角度和体积的精确测量。通过与模拟发动机实验对比验证,结果表明,检测的空间参数信息和实际参数值误差在4%以内,具有较高的检测精度。
The 3D model reconstructed by volume data from solid rocket motor ICT images was virtually cut so that the detectors can conveniently observe inner component and structure of solid rocket motors and judge the category and property of internal faults.Firstly,aiming at the characteristics of solid rocket motor volume data field,the segment result of volume data field and hierarchical volume data structure were combined to improve the existing ray projecting volume plotting method and realize the rapid plotting of the 3D model.On the basis of the above results,the human-computer interaction technology was applied into virtual slitting technology so as to realize plane slice and volume slitting in any place or any angle.Finally,space parameter measurement method based on feature point selection was designed to accurately measure the distance,angle and volume of cutting motor structure.Through the contrastive verification experiment with simulation motor,the results show that the error between the measured space parameter and the actual parameter is less than 4 percent,and the detection precision is reliable.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2010年第2期232-236,共5页
Journal of Solid Rocket Technology
基金
总装备部"十一五"预研课题(51328040107)
关键词
固体发动机
工业CT
加速体绘制
虚拟剖切
三维测量
solid motor
industry CT
accelerated volume rendering
virtual slitting
3D measurement
