FALLING ROCK GUARD NET WARNING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a falling rock guard net warning device capable of monitoring the state of a face of slope at a low cost without requiring a detection line. SOLUTION: An IC tag having a displacement sensor built therein and performing the radio transmission of measured displacement data is set on a falling rock guard net or on a rock of a face of slope, and an IC tag reader receiving the displacement data of the IC tag is provided. A wireless installation or a portable telephone is connected to the IC tag reader through a control unit for judging a displacement level to enable the transmission of the displacement data to a remote region. A solar cell and a battery may be used as the power supply of a system.