| 摘要 |
PROBLEM TO BE SOLVED: To provide a detection device for detecting lost personal belongings such as a cell phone, key holder, and wallet. SOLUTION: The detection device comprises a combination of a plurality of detectors (). Each of the plurality of detectors is attachably provided on each personal belonging (10, 11, and 21B). Each detector houses a transmission means (20G) for selecting a frequency of a weak wave to be transmitted among a plurality of different frequencies and transmitting a weak wave of the selected frequency to the outside, a reception means (20H) for selecting a frequency of a weak wave to be received among a plurality of different frequencies and receiving a weak wave of the selected frequency from other detectors, an annunciation means (20B, 20C, and 20E) for emitting an annunciation signal when the reception means receives a weak wave, a transmission means, and a power supply (21J) for supplying power to the reception means and the annunciation means. COPYRIGHT: (C)2009,JPO&INPIT
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