PNEUMATIC TIRE MONITOR SYSTEM AND PNEUMATIC TIRE MONITOR

摘要

PROBLEM TO BE SOLVED: To provide a pneumatic tire monitor capable of measuring the rotational speed of a tire and monitoring and adjusting a tire pressure. SOLUTION: This pneumatic tire monitor system 156 combined with a tire pressurizing and adjusting equipment 183 to monitor the state of the pneumatic tire of a tire/wheel assembly installed in a car comprises response apparatus 188 having transmission antennas installed on wheels 172 and transmitting signals indicating the state of the tire, one or a plurality of receivers having a receiving antenna fixedly installed on the car, and a circuit for processing received signals. The circuits of the response machines are positioned on a printed circuit board 185 in a protective housing 180 coaxial with the hub 170 of a wheel or a wheel carrier 172. The transmission antennas are selected from a group having partial loop antennas, spiral antennas, circular dipole antennas, and small coupled coils adjacent to ring antennas without an end.