| 摘要 |
PROBLEM TO BE SOLVED: To determine risk of a falling stone or the like, by detect the moving amount or the moving direction of a rock from a remote place without the aid of man power. SOLUTION: This falling stone risk determination system includes a sensor terminal having a triaxial acceleration sensor for measuring each acceleration value in the X-axis direction, the Y-axis direction and the Z-axis direction, which is a sensor terminal installed on a rock, for measuring the acceleration value resulting from movement of the rock; and a determination server for acquiring measurement information of the acceleration value measured by the sensor terminal by radio communication, and calculating the moving distance and the moving direction of the rock based on the measurement information, to thereby determine the falling stone risk of the rock. COPYRIGHT: (C)2008,JPO&INPIT
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