移动式三维激光扫描在地铁隧道结构检测中的应用  

Accuracy Analysis of Moving Laser Scanning Detection in Subway Tunnel

作　　者：聂亮 NIE Liang(Nanchang Surveying Mapping Institute Co.,Ltd.,Nanchang 330038,China)

机构地区：[1]南昌市测绘勘察研究院有限公司,江西南昌330038

出　　处：《城市勘测》2024年第6期176-178,共3页Urban Geotechnical Investigation & Surveying

摘　　要：基于轨道的移动三维激光扫描技术可高效获取隧道点云数据,并应用于隧道结构形态及表观病害等检测。因扫描设备的连续移动及姿态的动态变化特点,扫描点云需依赖惯导、里程编码器等多个传感器完成空间基准恢复统一。与常规固定架站扫描方法相比必然存在点云坐标精度差异,造成移动扫描成果质量的不确定性。本文采用高精度测量方式,从点云空间分布、点云相对精度方面解析移动扫描点云质量。从隧道椭圆度检测、管片错台检测等核心应用方面分析移动扫描检测成果精度情况。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 paper 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.

关 键 词：隧道结构病害检测 移动激光扫描 点云 椭圆度 收敛 管片错台 

分 类 号：P258[天文地球—测绘科学与技术]