一种新型地下管线方位测量与重建方法

A New Method for Measuring and Reconstructing Position of Underground Pipelines

在非开挖管道的探测中,由于管线的绝对位置难以测量,管道中心线的形状重建是一个关键性问题.提出了一种根据管道中心线在离散点上切线的空间方向角进行平面和空间形状重建的方法,通过两相邻离散点之间的空间位置关系,建立递推方程,以此将管道中心线形状重建出来.通过仿真算例验证该方法的重建误差在2%以内.同时也介绍了基于此测量方法的地下管线检测系统中传感头的设计,并进行了相应的实验,获得了良好的效果.

In the detection of trenchless pipelines, reconstruction of the pipe＇s axis is a key problem. This paper presents a fitting method for both planar and spatial curves using directional angles of tangents at discrete sampling points on the curve. Based on the relative positions of two adjacent points, iterative equations are established, and by iteration the entire curve is obtained. Simulation shows that the fitting error is within 2 %. Design of the sensor head in the measuring system is also introduced based on the reconstruction method. Experimental results show that it works properly.