| 摘要 |
This sensor node has: an electricity generating element (110) that harvests energy; an electricity storage device (120) that stores the electrical energy generated by the electricity generating element (110) and generates a power supply; transmission devices (200, 200A, 200B, 200C) having environment sensors (211, 212, 213) that acquire information about the surrounding environment, transmission control units (220, 220A, 220B, 220C), and transmission units (240, 240A); a first switching unit (310) provided between the transmission control units (220, 220A, 220B, 220C) and the electricity storage device (120); and a second switching unit (320) provided between the transmission units (240, 240A) and the electricity storage device (120). When the storage capacity of the electricity storage device (120) falls below a first threshold value and then increases, and the storage capacity reaches the first threshold value, the first switching unit (310) turns on, and the first switching unit (310) supplies electricity to the transmission control units (220, 220A, 220B, 220C), and when the storage capacity reaches a second threshold value which is higher than the first threshold value, the second switching unit (320) turns on, and the second switching unit (320) supplies electricity to the transmission units (240, 240A). |
