三维激光扫描技术在城市地下空间测量中的应用研究

Application of 3D Laser Scanning Techniqueto Measure Urban Underground Space

为验证三维激光扫描技术在城市地下空间测量中应用的可行性,本文在实验基础上,叙述其应用的过程、点云拼接的方法、工作效率,推证评定扫描精度的原理等。实验结果表明,扫描测图和全站仪测图比较,外业工作的时间前者是后者的1/3,内业成图时间后者是前者的3倍,前者的平面精度为2.6 cm,后者为4.6 cm,证明三维激光扫描技术不但可用于城市地下空间测量,而且具有较高的效率。

In order to test the feasibility of using 3D laser scanning technique to measure urban underground space, this article, based on experiments, narrates its application process, method of point clouds registration, work efficiency; and infers the principle of esti mating 3D laser scanning precision. The test results shows that when comparing 3D laser scanner mapping with total station mapping, the time spent on field work with former is 1/3 of the latter, time spent on office work with the latter is 1/3 of the former, the plane precision of the former is 2.6 cm and the plane precision of the latter is 4.6 cm. This proves that not only 3D laser scanning technique can be used to measure urban underground space, but also it has higher efficiency.