Patent ID: 7705714

Claim:
A detecting apparatus for detecting respective positions of a plurality of wheels provided on a body of a vehicle, said apparatus comprising: a plurality of triggering devices, each triggering device being provided on the body at a predetermined location associated with a vehicle wheel location, a plurality of transmitters, each transmitter being provided on one of the plurality of wheels, and a receiver provided on the body, each of the triggering devices being respectively dedicated to a specified one of the plurality of wheels, and sending a trigger signal to a respectively corresponding specified one of the plurality of the transmitters; each of the transmitters comprising: a first receiving unit configured to receive trigger signals; a first controlling unit configured to detect intensity of a received trigger signal, to embed a datum in a frame of data to be transmitted representing the detected intensity of the trigger signal together with an identifier representing a respective one of the plurality of transmitters, and to output the frame; and a transmitting unit configured to transmit the frame output by the first controlling unit to the receiver; and the receiver comprising: a second receiving unit configured to receive the transmitted frame; and a second controlling unit configured to detect a position of each of the plurality of wheels based on the intensity of the trigger signal embedded in the received datum, the second controlling unit comprising: an activating unit activating a triggering unit to send a trigger signal to a target transmitter associated with a specified one of the plurality of wheels; and a judging unit judging whether or not a received frame with an embedded datum is sent by the target transmitter based on whether or not the intensity of the trigger signal embedded in the frame is within a predetermined intensity range.