MONITORING DEVICE AND MONITORING METHOD

To prevent bearing diagnosis accuracy deterioration due to an influence of friction noise.SOLUTION: A monitoring device 80 is provided, comprising an acquisition unit 81 for acquiring measurements of a sensor 70, a detection unit 82 configured to detect friction noise of a bearing 51 on the basis of the measurements, and diagnostic unit 83 configured to diagnose a condition of the bearing 51 on the basis of the measurements, where the diagnostic unit 83 uses measurements excluding the friction noise detected by the detection unit 82 to diagnose the bearing 51.SELECTED DRAWING: Figure 3 【課題】擦過音の影響を受けて軸受の診断精度が低下することを防止する。【解決手段】監視装置８０は、センサ７０の計測値を取得する取得部８１と、計測値に基づいて、軸受５１の擦過音を検出する検出部８２と、計測値に基づいて、軸受５１の状態を診断する診断部８３とを備え、診断部８３は、検出部８２により検出された擦過音が含まれない計測値を用いて、軸受５１を診断する。【選択図】図３