Abrégé

A distributed system for monitoring an aircraft or a gas turbine engine for an aircraft with many sense devices positioned at different locations. Data acquisition units receive an electric signal from one sense device, or a plurality of electric signals from various sense devices, convert it or them to digital sensor data. The data acquisition units have access to a digital network, which is an integral part of the distributed system of the invention and enables the transmission and distribution of the digital sensor data in this manner. The invention can use several digital networks.

Classes IPC  ?

• G05B 23/02 - Test ou contrôle électrique

Abrégé

A sensor assembly providing a physical property of a vehicle, e.g. tire pressure of a wheel of an aircraft, comprises electronic circuitry including a locking arrangement (236) and sensor suited to sense the physical property and an exhaustable power source, e.g. a battery. For prolonged shelf life, a first (76,232,230,220) and a second (242,244, 220) switch means are functionally arranged between power source and circuitry. The 2nd switch means (242,244, 220) is controlled by the locking arrangement (236), whereas the first switch means (76,232,230,220) is controllable from outside the sensor assembly, e.g. by a magnetic field. The first switch means is arranged to switch the power to the electronic circuitry, whereby the locking arrangement is powered, too. In consequence, the locking arrangement is capable to close the second switch means (242,244, 220). Thereafter, a further stimulus to the first switch will no more be capable to switch the sensor off, unless the locking arrangement enables it again by opening the second switch means (242,244, 220).

Classes IPC  ?

• G01L 17/00 - Dispositifs ou appareils pour mesurer la pression des pneumatiques ou la pression dans d'autres corps gonflés
• B60C 23/04 - Dispositifs avertisseurs actionnés par la pression du pneumatique montés sur la roue ou le pneumatique
• G01M 17/00 - Test des véhicules
• B64F 5/60 - Test ou inspection des composants ou des systèmes d'aéronefs
• G01D 3/10 - Dispositions pour la mesure prévues pour les objets particuliers indiqués dans les sous-groupes du présent groupe avec dispositions pour intercaler des organes indicateurs ou enregistreurs supplémentaires ou auxiliaires
• G06F 1/26 - Alimentation en énergie électrique, p.ex. régulation à cet effet
• G06K 19/07 - Supports d'enregistrement avec des marques conductrices, des circuits imprimés ou des éléments de circuit à semi-conducteurs, p.ex. cartes d'identité ou cartes de crédit avec des puces à circuit intégré

Abrégé

Measurement of bladed rotors and, more particularly, speed measurement of bladed rotors in a turbine engine using microwave probes is described. In one embodiment, an apparatus for measuring bladed includes a microwave sensor that radiates a microwave signal toward a bladed rotor and receives a reflected microwave signal from the bladed rotor, a radio frequency module that generates the microwave signal radiated by the microwave sensor and down-converts the reflected microwave signal into a down-converted signal, and a main processing module configured to generate an output pulse train signal representative of a speed of the bladed rotor based on the down-converted signal. In another embodiment, a method for measuring bladed rotors is described including radiating a microwave signal, receiving a reflected microwave signal, down- converting the reflected microwave signal, and generating an output pulse train signal representative of a speed of a bladed rotor based on the down-converted signal.

Classes IPC  ?

• G01P 3/42 - Dispositifs caractérisés par l'utilisation de moyens électriques ou magnétiques