| 摘要 |
PURPOSE:To easily and securely search for a lost article, etc., by mounting a receiver which catches a radio wave from a transmitter selectively and outputs a warning on the lost article and a thing left behind. CONSTITUTION:When the lost article is searched for, the switch 5 of the transmitter A is turned on to turn on a power source. Consequently, a prescribed radio wave corresponding tot he kind of the lost article, etc., is outputted from a transmitting antenna 4 through an identification signal generation part 1 and a transmission part 2. This outputted radio wave of prescribed frequency is received by a reception part 7 through the receiving antenna 10 of a receiver B mounted on the lost article, etc. Then warning is displayed through a warning signal generation part 8 and a warning display part 9. This display is made with light, sound, etc. Then the lost article is easily and securely searched for. |
