| 摘要 |
PROBLEM TO BE SOLVED: To provide a location detection system capable of detecting relative locations between a mobile and radio frequency tags even when having distance relationship capable of communicating with a mobile side antenna and a plurality of the radio frequency tags. SOLUTION: The location detection system is mounted on the relatively moving mobile to the plurality of the radio frequency tags, and has a plurality of the antennas receiving radio wave signals including intrinsic discrimination information transmitted from each radio frequency tag. The location detection system detects transmission power of a communicable limit between one radio wave signal transmitting means and the antennas by changing the transmission power of the radio wave signals including communication requirement from a communication means to a radio wave signal transmitting means, and detects the relative locations of the antennas and the radio wave signal means from a ratio of distances between each antenna and one radio wave signal transmitting means calculated from the transmission power of the communicable limit between one detected radio wave signal transmitting means and each antenna. COPYRIGHT: (C)2009,JPO&INPIT
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