Method of measuring the compression of a shock absorber, and an airplane undercarriage constituting an application thereof

摘要

An airplane undercarriage including a shock absorber having first and second portions that are movable relative to each other. The undercarriage further including a first wave transceiver assembly disposed on the first movable portion. The assembly includes a first transmitter for transmitting a first wave towards the second movable portion and a first receiver for receiving the first wave after it has been reflected on an obstacle formed by a mechanical part secured to the second movable portion. The undercarriage also includes an independent second wave transceiver assembly disposed on the first movable portion. The second assembly includes a second transmitter for transmitting a second wave towards the second movable portion, and a second receiver for receiving the second wave after it has been reflected on an obstacle formed by a free surface of a hydraulic fluid contained in the shock absorber or a mechanical part defining the free surface.