| 摘要 |
PROBLEM TO BE SOLVED: To provide a position-prospecting method and a position-prospecting apparatus of the tip of an excavation body that can accurately allow an excavation hole to reach a specific position and a specific direction of a buried pipe, and eliminates the need for occupying the surface of the earth for a long time. SOLUTION: An AC magnetic field is generated from a transmission coil that is provided at a specific location in the tip section of the excavation body, and voltage values that are excited in a plurality of transmission coils are measured. Then, the position relationship is calculated, where the error to the theoretical voltage value in the reception coil that is calculated based on the position relationship between the reception and transmission coils can be minimized, thus obtaining the position and attitude in the tip section of the excavation body. |
