To provide a position detection system capable of separating the compressive waves sent from each transmission device in the receiving device even a plurality of transmission devices are made to operate without being synchronized to each other.
The transmission device 1 fixed on a fixed position such as on a ceiling or on a wall comprises the compressive wave transmission device 11 for transmitting the compressive waves intermittently and the discrimination data transmission part 12 for transmitting the intrinsic discrimination data by wireless signal of infrared ray as transmission medium. The receiving device 2 mounted on the detection object such as a moving body comprises: the compressive wave receiving part 21 for outputting the received output including the information of arrival direction of the compressive waves by receiving the compressive waves; and the discrimination data receiving part 22 for receiving the wireless signal including the discrimination data. In the receiving device 2, the interval for receiving the compressive waves by the compressive wave receiving part 22 is limited within the already determined time set after the discrimination data is received.
COPYRIGHT: (C)2007,JPO&INPIT
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