基于PCL的钢箱节段虚拟预拼装技术  

Virtual Preassembly Technology of Steel Box Segment Based on PCL

作　　者：朱爱珠[1] 王佳盟 潘文铭 崔冰 朱宏平[1] ZHU Aizhu;WANG Jiameng;PAN Wenming;CUI Bing;ZHU Hongping(College of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;CCCC SHEC Structural Engineering Co.,Ltd.,Wuhan 430011,Hubei,China;CCCC SHEC Technology Center,Wuhan 430014,Hubei,China)

机构地区：[1]华中科技大学土木与水利工程学院,湖北武汉430074 [2]中交二航局结构工程有限公司,湖北武汉430011 [3]中交二航局技术中心,湖北武汉430014

出　　处：《重庆交通大学学报（自然科学版）》2024年第1期10-17,共8页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：国家自然科学基金项目(52078230)。

摘　　要：针对目前工程应用中的虚拟预拼装技术存在主观性强、自动化程度低、数据处理过程较为复杂等缺点,首次提出将PCL应用于基于点云数据的钢箱节段虚拟预拼装技术。首先根据钢箱节段截面特征设计一套由面到线、由线到点的控制点提取方法;然后基于PCL中的高效点云处理算法对待拼装截面初始点云数据进行预处理、控制点提取及匹配,输出拼装误差结果;最后将虚拟预拼装技术中使用到的算法串联成群,形成一套完整的钢箱节段虚拟预拼装程序,实现从数据输入到结果输出。将提出的虚拟预拼装技术应用于某钢箱结构桥梁相邻节段,并将计算所得最大拼装误差1.22 mm与规范规定误差进行对比分析,说明基于PCL的虚拟预拼装技术可以有效完成钢箱节段的预拼装工作,具有结果准确、自动化程度高等优点;吊装有应力状态下的节段控制点竖向位移处于0.08~0.14 mm范围内,结果表明工厂扫描得到的控制点坐标可用于指导实际工程拼装。In view of the shortcomings of virtual preassembly technology in current engineering applications,such as strong subjectivity,low-level automation,and complex data processing process,the PCL was firstly introduced to virtual preassembly technology of steel box segment based on point cloud data.Firstly,a set of control point extraction method from surface to line,and from line to point was designed according to the section characteristics of steel box segment.Secondly,based on the high-efficient point cloud processing algorithm in PCL,the initial point cloud data of the assembly segment was preprocessed,control point extraction and matching were then carried out,and the assembly error results were output.Finally,the algorithms used in virtual preassembly technology were connected in series to form a complete set of virtual preassembly program for steel box segment,achieving data input and result output.The proposed virtual preassembly technology was applied to the adjacent segments of a certain steel box structure bridge,and the calculated maximum assembly error of 1.22mm was compared with that specified in the code.The results show that the virtual preassembly technology based on PCL can effectively complete the preassembly work of steel box segments,with the advantages of accurate results and high degree of automation.The vertical displacement of the segment control point under the state of hoisting stress is in the range of 0.08~0.14mm.The results show that the control point coordinates obtained by factory scanning can be used to guide the actual engineering assembly.

关 键 词：桥梁工程 钢箱节段 虚拟预拼装技术 PCL 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]