| 摘要 |
An objective of the present invention is to provide a system to detect an object through a solar-battery unit-driven scheme, capable of realizing the detection of the object at a long distance while maintaining a small battery capacity and a small power generation capacity of the solar panel. In order to accomplish the objective of the present invention, a reception unit (2) of a detection unit (3) includes a transmitter (30) which transmits a reception (photodetection) level of an infrared beam to a transmission unit (1), and a demand signal output unit (26) which transmits, to the transmission unit (1), a demand signal (M) used to demand the control of the intensity of the infrared beam to be transmitted such that the reception level matches a predetermined value. Upon receiving the demand signal (M), the transmission unit (1) includes an infrared ray (detection beam) intensity control unit (15) which controls the intensity of the infrared beam to be transmitted such that the reception level matches the predetermined value. A power source unit (31) is a solar battery unit including a solar panel, and a charging medium which stores power from the solar panel. |
