水平ボーリング搭載レーダ用リアルタイム画像処理の開発

Abstract

In order to identify the underground objects, we often use a Ground Penetrating Radar (GPR) from the point of reducing cost and time. But it is not a few cases that the pavement situation prevents from underground prospecting.From such background, we produced the prototype of the small GPR system to set into the drill head of the horizontal boring machine. And we are sure that it is highly possible to realize improving the limitation of exploration distance and resolution.In this report, we described the goal specification required to such a small GPR, basic design of system and its performance. And we introduce the technical details concerned to the real time image processing algorithm for radar system which is mounted in the jacking drill head of a horizontal boring system.The main functions of the image processing to use for a horizontal boring system are the followings.1) Distance presumption : Presumes the distance between a drill head and pipe.2) The piping direction distinction : Distinguishes the constructed direction of crossing pipe or parallel one.3) Azimuth presumption : Presumes the azimuth of pipe against the moving axis.As a result of experiments, it turned out that this algorithm was effective for the radar system of horizontal boring machine.