三维激光扫描技术在大型溶洞中的应用

Application of 3D Laser Scanning Technology in Large-scale Cave

对三维激光扫描技术用于大型溶洞的若干问题进行探讨,提出将整个溶洞划分成若干独立单元分别进行扫描,并利用控制点约束进行拼接的方案。在分析噪声产生原因的基础上,提出了几种不同的去噪方法,并给出了相应的计算公式和参考阈值。最后,提出利用全站仪测量景观特征点来检验扫描精度的方案。结果显示,扫描精度在2 mm以内,拼接精度在1cm以内,证明了本方案的有效性。

Through the exploration of the application of three-dimensional laser scanning technology in large-scale cave,this paper puts forward a project of dividing the whole cave into several independent units to scan and using control points to reassemble.Several different denoising methods and the corresponding formulas are proposed based on the analysis of the cause of noise.A program of using total station to measure landscape feature points to test the accuracy is made.Results demonstrate the effectiveness of this program by showing that the scan accuracy is within 2mm,registration accuracy is within 1cm.