| 摘要 |
PROBLEM TO BE SOLVED: To accurately detect the ground displacement with a simple configuration.SOLUTION: Information processors (gateway device 20, server device 30) store values obtained by chronologically measuring a vector of an inclination angle (displacement angle) for each of a plurality of inclination sensors 15 installed in a prescribed area 2 where observation on the ground displacement is performed, obtain components in the direction vertical to the inclination vector due to disturbance out of the inclination vectors due to the ground displacement for each vector before and after chronological change, and obtain the inclination vector due to the ground displacement by synthesizing the components in the vertical direction obtained for each inclination sensor 15. Concretely, the components in the direction vertical to the inclination vector due to the disturbance of the vector after change out of the vectors before and after chronological change are obtained as the components in the vertical direction.SELECTED DRAWING: Figure 17 |
