Estimation Method of the Radius, Depth and Direction of Buried Pipes with Ground Penetrating Radar

摘要

By using a nonlinear least-squares method to the propagation time data obtained by GPR (Ground Penetration Radar), we proposed an estimation method of the geometric conditions of buried pipes. They are estimated so that the geometrical model-calculated propagation times are fit to the observed ones at all antenna positions. The calculated propagation time is assumed to be given by the shortest path between the antenna and the buried pipe. Comparing conventional method to proposed method of experimental results, we confirmed that the proposed method is effective enough to estimate the geometrical conditions of a buried pipe.