| 摘要 |
<p>PROBLEM TO BE SOLVED: To set a detector at an arbitrary position, by detecting the vibration wave of ground generated at an exciting position on a straight line with a detector, and calculating the known plural distance data of detectors and its vibration characteristics as reference value. SOLUTION: Vibration of an impact wave generated at an exciting position is detected with each detector 2. A difference between the arrival times of vibration waves detected with each detector 2 is found. For instance, in the case where the detector 21 is made the reference of a time difference, a difference between the arrival times in the detector 21, 22 and another time difference between the other detectors 23...2n are found, and the relative position of each detector in which the detector 21 is made reference is established by performing relative comparison with a distance between the known detectors 21, 22 in a calculation means. The relative position of the other detectors, in the case the detector 21 is made reference from relative comparison with the arrival time difference of the vibration wave in the other detectors in the case where the distance between the known detectors 21, 22 and the arrival time difference of the vibration wave are made references, can be accurately measured.</p> |
