Wireless sensor assembly for an aircraft component

#This invention relates to a sensor assembly for an aircraft component.

#An aircraft has a number of components that require monitoring by a sensor. Through wires, these sensors communicate to an onboard computer the status and condition of these components. Because these sensors have wires, they require wire harnesses and fasteners to secure the wires to the aircraft in addition to wiring for power. Given the remote location of some aircraft components, the wiring associated with each sensor can be extensive. Consequently, monitoring is often limited to the sensor layout originally designed for the aircraft.

#From time-to-time, it is desirable to obtain more information about an aircraft component beyond the data provided by its original sensors. Adding hardwired sensors can be costly and impractical because of the difficulty of installing wiring on the aircraft after its original manufacture. A need therefore exists for a sensor that can easily be installed on an aircraft without the need for wires.

#FIG. 1 illustrates a schematic view of aircraft component assembly with wireless sensor assembly.

#FIG. 2 illustrates a plan schematic view of an aircraft using the wireless sensor assembly of FIG. 1.

#FIG. 3 illustrates a technique for aircraft maintenance.

#With reference to FIG. 1, there is shown a schematic view of aircraft component assembly 20. Aircraft component assembly 20 has aircraft component 16, such as an engine component, an environmental control system component, an auxiliary power unit component, a slat component, or any other aircraft component that requires monitoring by a sensor. Sensor 24 is provided and configured to monitor aircraft component 16. Sensor 24 is a smart sensor and has processor 40, memory unit 44 and local wireless transmitter/receiver 28. Memory unit 44 may be readable and writable. Data produced by sensor 24 about aircraft component 16 is communicated to processor 40, which controls sensor 24, local wireless transmitter/receiver 28 and memory unit 44. Processor 40 processes data from sensor 24 and transmits data to remote transmitter/receiver 32 with an authentication protocol that permits access to a remote computer (See FIG. 2).

#In addition, sensor assembly 26 has power source 48, which powers sensor 24, local wireless transmitter/receiver 28, processor 40 and memory unit 44. Power source 48 may be an energy generator, which generates energy associated with aircraft component 16, such as from the environment surrounding aircraft component 16 or from aircraft component 16 itself. Energy is thus crated near aircraft component 16 when installed on aircraft 10. For example, power source 48 could obtain energy from vibration of aircraft component 16 or surrounding components. In addition, power source 48 could generate energy from a temperature differential on or around aircraft component 16, given the large temperature differentials between some components of the aircraft and ambient air during flight. There is also static electricity that is created in-flight that may likewise be harnessed by an energy generator. Furthermore, mechanical movement of aircraft component 16 or surrounding components can also generate power sufficient for sensor assembly 26. Power source 48 may include a battery with power sufficient to last between scheduled maintenance inspections. Accordingly, sensor assembly 26 requires no wires for power or for communication. As a consequence, sensor assembly 26 can be installed easily and inexpensively on an aircraft, creating greater opportunity to monitor various in-flight conditions experienced by an aircraft component.

#With reference to FIG. 2 and FIG. 3, there is shown a method and system for aircraft maintenance. During the course of a ground inspection, a maintenance technician may suspect an issue concerning the operation of aircraft component 16, such as slat component 21, engine component 17, environmental control system component 18, or auxiliary power unit component 19. For example, on the ground, the maintenance technician would select slat component 21 for monitoring (see FIG. 3, step 100). The maintenance technician then installs sensor assembly 26 with an appropriate sensor 24 to monitor the specific condition for diagnosis of the issue (See FIG. 3, step 104). Sensor assembly 26 may have a battery or generate power locally as referenced in step 108 of FIG. 3. During flight operations, sensor assembly 26 wirelessly communicate (See FIG. 3, Step 112) data through local wireless transmitter/receiver 28 to remote transmitter/receiver 32, which is linked to aircraft computer 64. As shown, transmission relay 36 could be provided to boost communication between aircraft computer 64 and sensor assembly 26 by relaying signals between local wireless transmitter/receiver 28 and remote transmitter/receiver 32.