| 摘要 |
PROBLEM TO BE SOLVED: To provide a differential magnetic probing system capable of differential magnetic probing by using only one magnetic sensor part.SOLUTION: One magnetic sensor part incorporated in a movable body is used and the strength data of a magnetic field obtained by the magnetic sensor part, while the movable body is moved on a linear probing line is stored in association with the movement distance data of the movable body obtained by a distance sensor part, as position magnetic field data in a storage part. Only the position magnetic field data corresponding to a previously set distance between virtual magnetic sensor parts is extracted from all the position magnetic field data stored in the storage part, during analysis of data, the difference in the strength of the magnetic field between the position magnetic field data having the second largest movement distance is calculated for all the extracted position magnetic field data, and a magnetic object buried in the ground is probed based on the obtained difference in the strength of the magnetic field. |
