ABSTRACT
The precise measurement and positioning of the outline of high-altitude massive special-shaped structure has a guiding role in the installation of its external curtain wall and other ancillary facilities. Traditionally, total station measurement and other technical methods are mostly used, which have the disadvantages of large workload, long time-consuming and low accuracy. This paper takes the high-altitude corridor enclosure structure of Chongqing Raffles Square as the research object, combines the characteristics of Leica Nova MS60 high-precision three-dimensional laser scanning total station which can accurately locate and Faro x330 three-dimensional laser scanner which can scan quickly, and puts forward an excellent combination of two instruments. Based on the point scanning method and the mathematical optimization theory, a high-precision registration formula for point clouds with special-shaped structures is derived. On the premise of meeting the registration accuracy of point clouds, the rapid scanning and global positioning of a large number of special-shaped components are realized, and precise data are provided for the rapid extraction of contours. It has great application prospects and important applications in reverse modeling and deviation analysis.
