Safran Landing Systems

Safran Electronics & Defense

Messier-bugatti-dowty

Joel Zabulon

David Frank

Didier Levavasseur

Guillaume Fallet

A measurement device for measuring the pressure of a wheel () of a vehicle, the measurement device comprising a stationary portion () and a movable portion () for being driven in rotation by the wheel, the stationary portion including a first printed circuit () having at least one first track formed thereon defining a first winding, the movable portion including a second printed circuit () having at least one second track formed thereon defining a second winding, the second printed circuit being arranged to be connected to a pressure sensor (), the first winding and the second winding being coupled together to form a wireless communication channel, the measurement device being arranged in such a manner that the pressure sensor is electrically powered by the stationary portion via the wireless communication channel, and in such a manner that uplink data comprising pressure measurement data is transmitted to the stationary portion () by the movable portion () via the wireless communication channel.

Device for measuring tire pressure without a battery

A method for measuring the rotation speed of a wheel including the steps of: acquiring an analog measurement signal (Sma) generated by a magnetic tachometer and containing a useful signal the frequency of which is representative of the rotation speed of the wheel; digitizing in real-time the analog measurement signal (Sma) in order to obtain a time-dependent digital measurement signal (Smnt); calculating a Fourier transform of the time-dependent digital measurement signal (Smnt) in order to obtain a frequency-dependent digital measurement signal (Smnf); and carrying out a frequency analysis in order to identify by a search for peaks a useful spectral line () so as to obtain the frequency of the useful signal and therefore the rotation speed of the wheel.

Method for measuring the rotation speed of a vehicle wheel

An aircraft landing gear comprising an axle () intended to receive a wheel () comprising a rim () mounted to rotate on the axle () by means of at least one rolling bearing (). The rolling bearing () comprises an inner ring () mounted around the axle () and an outer ring () rotationally secured to the rim () of the wheel (). The landing gear further comprising a measurement device () intended to perform measurements of at least one operating parameter of the landing gear. The measurement device () is incorporated in the rolling bearing () by being secured to one of the inner or outer rings of the rolling bearing ().

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Chevilly-Larue, France

Joel Zabulon