Accuracy Analysis of Moving Laser Scanning Detection in Subway Tunnel
The dynamic 3D laser scanner dived on rail can quickly get the point cloud of tunnel,and be used to the detection of tunnel structural morphology and apparent diseases.Due to the continuous movement of the scanner and the dynamic attitude,the point cloud must recovery to same coordinate system by multiple sensors such as gyroscope and mileage encoder.Compared with the conventional scanning method,the accuracy of point cloud with dynamic scanning technology is different,and result to the uncertainty of the quality of data.This pa-per uses high-precision measurement method to analyze the quality of dynamic scanning point cloud from the spatial distribution and relative accuracy.And this paper analyze the detection results from the ellipticity and the segment staggering of the tunnel.
万方数据
维普
