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针对传统皮尺测绘、全站仪在结构复杂的多功能风洞中存在采集作业难、数据精度低、信息不完整等局限性,提出基于高精度、高密度的点云数据开展对风洞施工量测的研究。通过对点云进行预处理及算法的运用,解决风洞数据获取难、信息不完整瓶颈,实现施工量测数据的有效获取及分析。基于点云预处理数据,可获取风洞的二维线划图、立面图、三维信息模型及统计分析等成果;基于点云数据运用算法,能够快速、准确地对风洞内墙面的平整度提取分析,判断施工是否符合要求,这是传统测绘方法无法获取的,验证该技术方法在多功能风洞测量的优越性和必要性。应用结果表明,地面三维激光扫描技术对该风洞的施工量测及建筑信息提取均优于传统方法,成效明显。
In view of the traditional tape measure and mapping, the total station has some limitations in multi-functional wind tunnel with complex structure, such as difficulty in collecting data, low data accuracy and incomplete information. It is proposed that the construction of wind tunnel based on high-precision and high-density point cloud data Measured research. Through the pretreatment of point cloud and the application of algorithm, it is difficult to obtain wind tunnel data and the bottleneck of incomplete information to achieve effective acquisition and analysis of construction measurement data. Based on the point cloud preprocessing data, the results of two-dimensional line drawing, elevations, three-dimensional information model and statistical analysis of the wind tunnel can be obtained. Based on the point cloud data, the algorithm can quickly and accurately estimate the wind tunnel inner wall Flatness extraction analysis to determine whether the construction meets the requirements, which is not available to traditional mapping methods to verify the superiority and necessity of the method in multi-functional wind tunnel measurement. The application results show that the ground 3D laser scanning technology is superior to the traditional methods in the construction measurement and building information extraction of the wind tunnel and the results are obvious.