ILLEGAL PARKING WARNING SYSTEM

PROBLEM TO BE SOLVED: To achieve an illegal parking warning system configured so as to be easily mounted and used as a product to be installed by applying a communication function to be used for detecting the wheel positions of a tire air pressure detection device. SOLUTION: This illegal parking warning systems 1a and 1b are provided with trigger transmitters 20 and 60 installed in the neighborhood of a parking space; a transmitter 10 installed in each wheel 200 of a vehicle 100; and a controller 40. The transmitter 10 transmits a response signal including the identification information (ID) of a self-transmitter 10 as a response to trigger signals transmitted from the trigger transmitters 20 and 60. The controller 40 receives a response signal from each transmitter 10, and decides whether or not the ID included in the received response signal is matched with preliminarily registered permission ID. Then, when the received ID is not matched with the permission ID, a warning unit 50 or the trigger transmitter 60 with the warning unit is made to issue a warning. COPYRIGHT: (C)2009,JPO&INPIT