Device for monitoring the air-pressure in pneumatic tires fitted on vehicle wheels

摘要

PCT No. PCT/EP93/00452 Sec. 371 Date Nov. 23, 1993 Sec. 102(e) Date Nov. 23, 1993 PCT Filed Feb. 26, 1993 PCT Pub. No. WO93/16891 PCT Pub. Date Sep. 2, 1993A device for monitoring the air pressure in pneumatic tires comprises a transmitting device fitted to each wheel of a vehicle and rotating with it, and a receiver which is built into the vehicle or accommodated in a separate housing. The transmitting device mounted in the wheel comprises a pressure gauge for measuring the tire pressure, a transmitter and a signal generator which generates an identification signal unique to each transmitter and transmitted before or after the pressure signal. The receiver processes received signals only when the identification signal received matches a reference identification signal stored in the receiver. This facilitates reliable operation of the monitoring device and prevents false alarms.