Tire condition monitoring apparatus, transmitter, and receiver

A tire condition monitoring apparatus, having a plurality of tire information transmitting devices, each provided in one of tires of a vehicle, wherein each tire information transmitting device wirelessly transmits tire information, wherein the tire condition monitoring apparatus receives the tire information from the tire information transmitting devices and monitors a condition of each tire, the apparatus comprising:

• a plurality of trigger signal transmitting devices, each of which corresponds to one of the tire information transmitting devices, wherein each trigger signal transmitting device wirelessly transmits a trigger signal to the corresponding tire information transmitting device;
• a plurality of determination signal transmitting devices, each of which is provided in one of the tire information transmitting devices, wherein each determination signal transmitting device wirelessly transmits a predetermined determination signal two or more times within a fixed time period based on the trigger signal from the corresponding trigger signal transmitting device, the determination signal including the tire information;
• a receiving device which receives the determination signals from the determination signal transmitting devices;
• and
• a determining device which determines whether there is a match between a plurality of determination signals received by the receiving device and, when there is a match, locates a position of the corresponding tire and processes the tire information as valid information;
• wherein each determination signal transmitting device encodes and wirelessly transmits data of an air pressure of the corresponding tire two or more times, and wherein the determining device determines whether two determination signals indicative of the encoded air pressure data are included in a predetermined error range, thereby determining whether there is a match between the determination signals.