SENSOR NODE AND VIBRATION MONITORING SYSTEM

[Object] To provide a sensor node and a vibration monitoring system that are unlikely to overlook an abnormal vibration when an anomaly occurs and that can transfer data immediately after the anomaly occurs.[Solution] A sensor node 10 includes an acceleration sensor 11 that measures a vibration characteristic of a monitoring target 70, a memory 17, a sensor node radio communicator 19, and a sensor node controller 15. The sensor node controller 15 sends a detection signal indicating a detection of an abnormal vibration via the sensor node radio communicator 19 to the command center 20 immediately after the acceleration sensor 11 detects the abnormal vibration; after sending the detection signal, causes the acceleration sensor 11 to newly measure the vibration characteristic of the monitoring target 70 and stores the measured acceleration data as stored data in the memory 17; and in response to a stored data transfer request from the command center 20, transfers the stored data via the sensor node radio communicator 19 to the command center 20.