超大速滑场地制冰排管形态的高精度快速检测

High-precision and fast detection for the shape of ice pipe in super-large speed skating area

国家速滑馆为全球首个采用CO_(2)跨临界直冷制冰的冬奥速度滑冰场馆,冰面约1.2万m2,为精确控制冰面温度、厚度和稳定性等,其制冰排管的高精度安装非常重要。传统测量方法通过30%的抽查,以离散抽样检查评估排管整体情况,盲目性高且工作效率低;而采用三维激光点云数据可提取每根排管的空间位置信息,更全面、高效地检测制冷排管的安装情况。本文提出基于多靶球棱镜的三维激光作业方式,突破了在复杂施工环境下高定位精度点云数据的有效获取,并提出排管的翘曲检测法和平行度检测法,可以高精准地实现制冰排管的检测工作,为国家速滑馆的建设和运维提供重要依据,对于特异性建筑施工检测具有借鉴意义。

The National Speed Skating Oval is the world’s first super-large ice surface cooled by carbon dioxide,covering an area of about 12000 square meters.The high-precision installation of the ice pipe is very important.The traditional measurement method evaluates the overall situation of drainage through 30% spot check and discrete sampling check.Three-dimensional laser point cloud data can extract the spatial location information of each tube,and detect the installation of refrigeration tube more comprehensively.In this paper,a three-dimensional laser operation method based on multi-target ball prism is proposed,and two new algorithms are proposed,the warpage detection method and the parallelism detection method of the tube.This method provides an important basis for the construction,operation and maintenance of the National Speed Skating Oval.This method can be used as a reference for specific building construction detection.