Fujikura Limited

Hiroyuki Hayashi

Kenta Kaneeda

Masato Takigahira

Taku Taguchi

Toshimitsu Asakura

A sensor node of the invention includes: a first to nth (n is an integer equal to or greater than two) environmental sensors which are configured to acquire ambient environmental information; a transmitter that is configured to regularly issue ambient environmental information acquired by at least one of the second to nth environmental sensors at a predetermined cycle and is configured to irregularly issue ambient environmental information acquired by the first environmental sensor and ambient environmental information acquired by at least one of the second to nth environmental sensors; a detector that is configured to detect a change value of ambient environmental information acquired by the first environmental sensor greater than a first threshold value; and a transmission interval controller that is configured to control a timing at which the transmitter regularly and irregularly issues the ambient environmental information.

Sensor node and method of controlling the same

An object of the present invention is to provide a planar type antenna unit and a planar type wireless device capable of reducing a projecting area of the wireless device. To achieve the above object, the planar type wireless device of the present invention is provided with a grounded planar antennawhich includes a radiating elementand a ground plate, a thin-film batterywhich includes a positive-electrode current collectoropposing a negative-electrode current collector which is formed by the ground plate, and a transmitter/receiver IC arranged at a power feeding pointof the grounded planar antennaand including a transmitter-receiver circuit which receives power from the negative-electrode current collector of the thin-film batteryand the positive-electrode current collectorof the thin-film battery, and transmits and receives signals by operating the radiating elementof the grounded planar antenna

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Sakura, Japan

Hiroyuki Hayashi