| 摘要 |
<p>PROBLEM TO BE SOLVED: To detect an existence of a human in a set area regardless of the motion of the human. SOLUTION: A transmitting device 1 is held by individual persons, and a position signal is transmitted from the transmitting device 1 through radio wave as a medium. A human body detecting terminal 33 determines whether the transmitting device 1 transmitting the position signal exists in a prescribed area or not, and instructs to turn on a lighting load L if the transmitting device 1 exists. The instruction from the human body detecting terminal 33 is transmitted to a relay terminal 32 by a transmission signal transmitted on a signal line Ls. The relay terminal 32 turns on the lighting load L.</p> |
