| 摘要 |
A sensor node includes a power generator (110) configured to perform environmental power generation, a power storage (120) configured to store energy generated by the power generator (110) to generate a power supply, a transmitter (200, 200A, 200B, 200C) having an environment sensor (211, 212, 213) configured to acquire information relating to a surrounding environment, a transmission controller (220, 220A, 220B, 220C), and a transmission unit (240, 240A), a first switcher (310) provided between the transmission controller (220, 220A, 220B, 220C) and the power storage (120), and a second switcher (320) provided between the transmission unit (240, 240A) and the power storage (120). In a case where the storage capacity of the power storage (120) decreases to a first threshold or less and then the storage capacity increases, when the storage capacity reaches the first threshold, the first switcher (310) is brought into an on-state and the first switcher (310) supplies electric power to the transmission controller (220, 220A, 220B, 220C). When the storage capacity reaches a second threshold higher than the first threshold, the second switcher (320) is brought into an on-state and the second switcher (320) supplies electric power to the transmission unit (240, 240A). |
