摘要
提升工业CT检测系统的技术性能一直是射线无损检测领域系统研发人员和用户共同追求的目标。基于这一目标,提出了采用耦合闪烁屏与科学级面阵CMOS相机的CT图像探测方法,本文介绍了利用该方法在微焦点工业CT系统硬件研制和软件开发方面涉及的重要工程技术细节。给出了自主研发的抗辐照X射线数字相机与商用平板探测器的实测技术指标对比结果、X射线CT集成软件(CTER MAX)与商用软件在CT重建算法计算效率方面的对比结果以及CT系统空间分辨率检测结果。结果表明:抗辐照X射线数字相机具备超高像素采样、低噪声、高动态范围、高分辨、耐辐照、低成本等优势,尤其在空间分辨率上较平板探测器有更大的提升空间,使用更为灵活,适应更多应用场景需求;CTER MAX软件功能完整、操作友好、较商业软件在计算性能上有约4.5倍的速度提升;CT系统综合空间分辨率最高为5μm,与射线源焦斑尺寸相当。整个系统运行稳定可靠、可推广应用于航空发动机叶片、岩芯检测等各工业无损检测领域。
Improving the technical performance of the industrial computed tomography(CT)testing sys⁃tem has always been the common objective of the system’s R&D personnel and users in the field of radio⁃graphic nondestructive detection.To this end,a CT image detection method using a scintillation screen coupled with a scientific level-filter array complementary metal–oxide–semiconductor(CMOS)camera is proposed.The important engineering details associated with the hardware and software development of the micro focus industrial CT system using this method are introduced.The comparison results of the mea⁃sured technical parameters of the independently developed anti-radiation X-ray digital camera and those of the commercial flat panel detector are presented.In addition,the comparison results of the computed effi⁃ciency of the CT reconstruction algorithm of the X-ray CT integrated software(CTER MAX)and that of an equivalent commercial software,as well as the detection results of the CT system spatial resolution are described.The results indicate that the anti-radiation X-ray digital camera has advantages including ultrahigh pixel sampling,low noise,high dynamic range,high resolution,radiation resistance,and low cost.In terms of spatial resolution,it has more scope for improvement than the flat panel detector and is more adaptable to meeting the needs of more application scenarios.The CTER MAX software has complete functionality and is user-friendly.Compared with the commercial software,it has approximately 4.5 times faster computing rate.The comprehensive spatial resolution of the CT system is 5μm,which is equiva⁃lent to the focal spot size of the radiation source.The system is stable and reliable,and it can be extensive⁃ly used in various industrial nondestructive detection fields,such as the detection of defects in aircraft en⁃gine leaves(or blades)and rocks.
作者
阳庆国
谭伯仲
YANG Qingguo;TAN Bozhong(China Academy of Engineering Physics,Institute of Fluid Physics,Mianyang 621900,China)
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2023年第6期804-812,共9页
Optics and Precision Engineering
基金
国家自然科学基金资助项目(No.12004354)。
关键词
工业CT
无损检测
X射线数字相机
锥束
图像
industrial CT
digital X-ray camera
non-destructive detection
cone beam
image
