SENSOR DEVICE, REDUCER, TRAVEL UNIT FOR CRAWLER, FLUID VALVE, FLUID CYLINDER, FLUID PUMP, FLUID COMPRESSOR, ELECTRIC MOTOR, ELECTRIC ACTUATOR, STRUCTURE, METHOD IN WHICH SENSOR DEVICE IS IMPLEMENTED, SENSOR SYSTEM, AND TABLET

摘要

This sensor device 10 is attached to, e.g., a machine component. The sensor device 10 comprises a sensor unit 12, an output unit 16, and a power harvesting unit 22. The sensor unit 12 measures a state related to the machine component. The output unit 16 outputs information based on the result of measurement by the sensor unit 12 to outside of the system. The power harvesting unit 22 converts energy present in the external environment to electric power, and stores electric power for activating the sensor unit 12 and/or the output unit 16.