The Influence of Rotation Table Rotating Accuracy on Reconstructed Image Quality of Industrial CT
-
摘要: 研究旋转扫描台回转精度与工业CT重建图像质量的关系, 对选择合适回转精度的旋转扫描台, 降低加工成本具有现实意义。通过计算机仿真分析, 模拟了旋转扫描台回转偏差分别服从正态分布、偏态分布的情况, 采用滤波反投影算法重建了不同回转精度情况下的工业CT图像, 并通过数值指标对工业CT重建图像的质量进行了定量评价。仿真结果表明, 旋转扫描台的绝对定位精度对工业CT重建图像质量影响较大, 而旋转扫描台的重复定位精度对工业CT重建图像质量影响较小。Abstract: The study on the influence of rotation table rotating accuracy on reconstructed industrial CT image quality was meaningful to select a suitable rotation table and reduce the processing cost of rotation table. In the simulation, the location errors of rotation table were divided into two types: normal distribution and skew distribution. And the projection data of different accuracy case were reconstructed by filtered back-projection algorithm. In addition, the quality of industrial CT image was evaluated by numerical indicators. The simulation results show that the absolute positioning accuracy of rotation table had a strong influence on reconstructed image quality, while the repeated positioning accuracy of rotation table had less effect on the image quality.
-
Keywords:
- Industrial CT /
- Rotation table /
- Rotating accuracy /
- Reconstructed image quality
-
-
[1] 张朝宗. 工业CT技术参数对性能指标的影响［J］. 无损检测, 2007, 29(1): 48-52. [2] 范晋伟, 王志远, 王晓峰. 数控机床旋转轴误差辨识研究［J］. 机械设计与制造, 2014(9): 156-158. [3] 张定华, 黄魁东, 程云勇. 锥束CT技术及其应用［M］. 西安: 西北工业大学出版社, 2010, 31-53. [4] 袁胜万. 直驱式回转工作台传动性能分析［J］. 机床与液压, 2014, 42(15):114-117. [5] 郭智敏, 倪培君, 曹玉玲, 等. 工业CT系统空间分辨率两种测试方法分析与评价［J］. CT理论与应用研究, 2015, 24(3): 393-399. [6] 卢秉恒. 机械制造技术基础［M］. 北京: 机械工业出版社, 2013, 256-296. [7] 丛鹏, 李志鹏, 邬海峰. 射线源的定位精度对工业CT图像质量的影响［J］. 原子能科学技术, 2004, 38(增刊): 244-247. [8] 王艳飞, 李公平, 潘小东, 等. 平台运动精度对ART算法图像重建质量影响的模拟［J］. 无损检测, 2013, 35(11): 39-42.
计量
- 文章访问数: 0
- HTML全文浏览量: 0
- PDF下载量: 1
下载:
