铸件X射线检测虚拟探伤图像生成方法  

Method of Generating Virtual Flaw Detection Image for X-Ray Inspection of Castings

作　　者：董淏 侯明君 计效园[1] 李沁阳 吴楚澔 李硕宏 郄喜望 陈强[3] 李宁[1] 周建新[1] 高亮[4] DONG Hao;HOU Ming-jun;JI Xiao-yuan;LI Qin-yang;WU Chu-hao;LI Shuo-hong;QIE Xi-wang;CHEN Qiang;LI Ning;ZHOU Jian-xin;GAO Liang(State Key Laboratory of Materials Processing and Die&Mould Technology,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;Beijing Institute of Aeronautical Materials,Beijing 100095,China;No.59 Research Institute of China Ordnance Industry,Chongqing 710100,China;School of Mechanical Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China)

机构地区：[1]华中科技大学材料成形与模具技术全国重点实验室,湖北武汉430074 [2]中国航发北京航空材料研究院,北京100095 [3]中国兵器工业第五九研究所,重庆710100 [4]华中科技大学机械科学与工程学院,湖北武汉430074

出　　处：《铸造》2024年第6期835-842,共8页Foundry

基　　金：国家重点研发计划项目(2020YFB1710100);国家自然科学基金(52275337、52090042和51905188)。

摘　　要：随着国防核心装备对零件的要求不断提高,铸件向结构复杂化方向发展,如大壁厚差、多交叉结构等,致使铸件内部缺陷的无损检测更困难。X射线探伤过程中,拍片依赖人工反复调整成像部位和参数,存在探伤部位易漏检、成像质量波动大等问题,亟需发展智能分区调参拍片技术。为此,本文提出了铸件X射线检测虚拟探伤图像生成方法。首先,建立了铸件坐标降维映射模型,实现了铸件三维坐标降维映射到成像板平面二维坐标。其次,建立了仿真成像参数拟合模型,生成了点光源式虚拟射线对铸件三维模型的仿真探伤图像。最后,开发了铸件X射线检测虚拟成像系统。该方法可为实际探伤提供优化的成像姿态和成像参数信息,为智能分区调参拍片技术提供理论支撑。With the continuous improvement of the requirements for parts of national defense core equipment,castings are developing in the direction of complex structures,such as large wall thickness differences and multi-cross structures,which make it more difficult to detect internal defects in castings.In the process of X-ray flaw detection,filming relies on manual adjustment of imaging parts and parameters.There are problems such as easy missed detection of flaw detection parts and large fluctuations in imaging quality.It is urgent to develop intelligent partition parameter adjustment filming technology.For this reason,this paper proposes a method for generating virtual flaw detection images for X-ray inspection of castings.Firstly,the casting coordinate dimension reduction mapping model is established,and the dimension reduction mapping of the casting threedimensional coordinates to the two-dimensional coordinates of the imaging plate is realized.Secondly,the simulation imaging parameter fitting model is established,and the simulation flaw detection image of the standard three-dimensional model of the casting is generated by the point source virtual ray.Finally,a virtual imaging system for X-ray inspection of castings is developed by integrating the two models.This method can provide optimized imaging attitude and imaging parameter information for actual flaw detection,and provide theoretical support for intelligent partition parameter adjustment and filming technology.

关 键 词：X射线探伤 铸件三维模型 点光源成像 虚拟探伤图像 

分 类 号：TG115.2[金属学及工艺—物理冶金]