Device for measuring tire pressure without a battery

#This application is a National Stage of International Application No. PCT/EP2019/076783 filed Oct. 2, 2019, claiming priority based on French Patent Application No. 18 59256 filed Oct. 5, 2018, the entire contents of each of which are herein incorporated by reference in their entireties.

#The invention relates to the field of devices for measuring the pressure of a tire of a wheel mounted on an axle of a vehicle.

#A modern aircraft is conventionally fitted with a system for automatically monitoring the pressure that prevails in the tires of the wheels of the aircraft (this is also referred to as a “tire pressure monitoring system” (TPMS)). For each wheel, the monitoring system includes a pressure sensor situated on the wheel. The monitoring system also includes transmission means for transmitting pressure measurement data to the avionics, in order to provide a real-time display of the pressure of each wheel or else proper-operation information associated with each wheel.

#Reference is made to the accompanying drawings, in which:

#FIG. 1 shows an aircraft wheel and a measurement device of the invention;

#FIG. 2 shows a first winding, a second winding, a first processor unit, and a second processor unit of the measurement device of the invention;

#With reference to FIGS. 1 and 2, the measurement device 1 of the invention is intended mainly to measure the pressure that prevails inside a tire 2 of a wheel 3 of an aircraft. The wheel 3 is mounted on an axle 4 situated at the bottom of an aircraft undercarriage.

#The measurement device 1 includes a stationary portion 5 that is secured to the axle 4. The stationary portion 5 comprises a first processor unit 6 and a first printed circuit 7.

#In this example, the first processor unit 6 is situated inside the axle 4, in the proximity of the end of the axle 4 and thus in the proximity of the wheel 3. The first processor unit 6 is connected to calculation means 8 (or to a data concentrator), situated inside the fuselage of the aircraft via a first cable 9 running in part inside the axle 4. The calculation means 8 forward or process the pressure measurement data produced by the measurement device 1, thereby enabling the pressure measurement data to be used for automatically monitoring the pressure of the tire 2 of the wheel 3. The first processor unit 6 includes in particular a first transceiver.