Power source device for sensor nodes of ubiquitous sensor network

In the USN systems, less expensive, yet provide a constant electricity supply, and provides the power element of the possible small size fitted to the sensor nodes of the USN USN sensor node. As solar power devices with self-development capabilities; Storing electricity generated from the solar cell, and a ubiquitous sensor networks: a secondary battery that supplies electricity to the sensor nodes (sensor nodes) of (Ubiquitous Sensor Network USN); Characterized in that the including, and the solar cell, a secondary cell and an interface circuit mounted in the sensor node; and a solar cell and a second interface circuit for connecting the battery. USN sensor node of the power device of the present invention is stored in the secondary battery electricity continuously occurring in the solar cell, and also continuous and stable supply of the low-current electricity required by the sensor nodes constituting the network. The ubiquitous sensor network, the sensor node, the dye-sensitized solar cell, a lithium secondary battery