MONITORING DEVICE AND SOUNDNESS MONITORING SYSTEM

To provide a monitoring device and a soundness monitoring system which can precisely evaluate soundness of at least one of a bridge pier, a foundation of the bridge pier, and ground of the foundation even when a dominant frequency cannot be accurately calculated.SOLUTION: A monitoring device 100 includes: an acceleration sensor 111 configurated in a manner to be able to measure microtremor and an inclination angle of a bridge pier; an analyzer 1121 for calculating a dominant frequency of the bridge pier on the basis of measurement data on the microtremor by the acceleration sensor 111; a communicator 114 configurated in such a manner that a switch signal can be input to it; and a measurement frequency changer 1122 for changing frequencies of the measurement of the microtremor and the inclination angle by the acceleration sensor 111 on the basis of the switch signal input to the communicator 114.SELECTED DRAWING: Figure 2 【課題】卓越振動数を精度良く算出できない場合でも、橋脚、橋脚の基礎および基礎の地盤の少なくとも１つの健全度を適正に評価できるモニタリング装置および健全度モニタリングシステムを提供すること。【解決手段】モニタリング装置１００は、橋脚の常時微動および傾斜角を測定可能に構成された加速度センサ１１１と、加速度センサ１１１よる常時微動の測定データに基づいて、橋脚の卓越振動数を算出する解析部１１２１と、切替信号を入力可能に構成された通信部１１４と、通信部１１４に入力された切替信号に基づいて、加速度センサ１１１による常時微動の測定頻度および傾斜角の測定頻度を変更する測定頻度変更部１１２２と、を備える。【選択図】図２