| 摘要 |
PROBLEM TO BE SOLVED: To obtain parking assistant systems in easily installable and utilizable forms as a post attachment product by applying a communication function used for the wheel position detection of a tire air pressure detection device. SOLUTION: The parking assistant systems 1a, 1b are provided with trigger transmitters 20, 60 installed at a neighborhood to a parking space and at a position for defining a range in which a vehicle can be parked; transmitters 10 mounted to respective wheels 200 of the vehicle 100; and a control device 40. The transmitter 10 sends a response signal indicating receiving intensities of trigger signals as responses to the trigger signals transmitted from the trigger transmitters 20, 60. The control device 40 receives the response signals from the respective transmitters 10 and specifies distances of the respective trigger transmitters 20, 60 and the respective transmitters 10 based on the receiving intensities indicated by the received response signals. Further, when the specified distance is within a predetermined warning area, a warning machine 50 or the trigger transmitter 60 with a warning machine is made to issue an alarm. COPYRIGHT: (C)2009,JPO&INPIT
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