Patent Application
20160046158
The present disclosure relates to aircraft landing gear, and, more specifically, to a tire pressure monitoring system for aircraft landing gear.
Aircraft landing gear may have tires designed to run at specific tire pressures. From time to time, ground crews may have to measure the tire pressures from outside of the aircraft. Ground crews may measure the air pressure using a gauge to visit and measure the pressure at every tire on the aircraft. Some tires may be difficult to access as there may be limited clearance around the tires. For example, some aircraft may have only 3 to 4 feet of clearance between the aircraft and the ground at the locations of under-wing main gear assemblies. Ground crews may have to crawl or roll to access the main wheels. Furthermore, ground crews may have to visit each wheel on the aircraft and spend time to measure each tire pressure.
A system for measuring tire pressure on an aircraft includes a first wheel with a first tire pressure. A first tire pressure sensor on the wheel may be configured to output an electronic measurement of the tire pressure. A transmission device may be electrically coupled to the first tire pressure sensor and configured to transmit the first electronic measurement. A hubcap may be on the first wheel with a transmission device mounted to the hubcap. The first transmission device may be an infrared light-emitting diode. An axle telemetry unit may be in electromagnetic communication with the hubcap.
In various embodiments, the system may further include a second wheel with a second tire pressure. A second tire pressure sensor may be on the second wheel to output a second electronic measurement of the second tire pressure. A first hubcap may be at a proximal region of the first wheel, wherein the first hubcap is configured to receive the second electronic measurement of the second tire pressure. The first wheel may be mounted on a nose gear assembly, and the second wheel may be mounted on a main gear assembly. A second hubcap may be at a proximal region of the second wheel. The second hubcap may be configured to receive the first electronic measurement of the first tire pressure. A second transmission device may be configured to transmit the second electronic measurement. The second transmission device may be configured to transmit the first electronic measurement. The first transmission device may be mounted to a nose gear assembly. An infrared capable device may receive the first electronic measurement.
A hubcap for an aircraft may include a coil disposed on a first surface of the hubcap.
The hubcap may be configured to receive a tire pressure. A communication interface may be disposed on a second surface of the hubcap and electrically connected to the coil. The communication interface may further comprise an infrared light-emitting diode. The communication interface may comprise a wireless communication interface. The coil may be configured to receive a second tire pressure from a second hubcap. The communication interface may be configured to output the second tire pressure from the second hubcap.
The foregoing features and elements may be combined in various combinations without exclusivity, unless expressly indicated otherwise. These features and elements as well as the operation thereof will become more apparent in light of the following description and the accompanying drawings. It should be understood, however, the following description and drawings are intended to be exemplary in nature and non-limiting.
The subject matter of the present disclosure is particularly pointed out and distinctly claimed in the concluding portion of the specification. A more complete understanding of the present disclosure, however, may best be obtained by referring to the detailed description and claims when considered in connection with the figures, wherein like numerals denote like elements.
The detailed description of exemplary embodiments herein makes reference to the accompanying drawings, which show exemplary embodiments by way of illustration. While these exemplary embodiments are described in sufficient detail to enable those skilled in the art to practice the inventions, it should be understood that other embodiments may be realized and that logical changes and adaptations in design and construction may be made in accordance with this invention and the teachings herein. Thus, the detailed description herein is presented for purposes of illustration only and not of limitation. The scope of the invention is defined by the appended claims. For example, the steps recited in any of the method or process descriptions may be executed in any order and are not necessarily limited to the order presented.
Furthermore, any reference to singular includes plural embodiments, and any reference to more than one component or step may include a singular embodiment or step. Also, any reference to attached, fixed, connected or the like may include permanent, removable, temporary, partial, full and/or any other possible attachment option. Additionally, any reference to without contact (or similar phrases) may also include reduced contact or minimal contact. Surface shading lines may be used throughout the figures to denote different parts but not necessarily to denote the same or different materials.
As used herein, “distal” refers to the direction radially outward, or generally, away from the axis of rotation of a wheel. As used herein, “proximal” refers to a direction radially inward, or generally, towards the axis of rotation of a wheel.
In various embodiments, the system also includes main gear components. Each main gear wheel may have a corresponding wheel speed transducer (WST) 512. WST may be in electromagnetic communication with main gear hubcap 514. Main gear hubcap 514 is electrically coupled to TPS 516. The tire pressure is measured by TPS 516 and an electrical signal detailing the measurement flows through a coil in main gear hubcap 514. The coil in main gear hubcap is adjacent a coil in WST 512 so that the signal from TPS 516 may transfer through main gear hubcap 514 into WST 512 by induction or other electromagnetic communication. The tire pressure signal from TPS 516 may also flow through an IR LED in main gear hubcap 514 to transmit the tire pressure to wireless capable device 524.
In various embodiments, tire pressure data from all wheels may be sent to one or more location on the exterior of the aircraft for transmission, such as a nose gear hubcap 504 or a main gear hubcap 514. For example, the tire pressure signal from TPS 516 measuring a main gear tire pressure may be sent to nose gear hubcap 504 by a direct signal through BCU 500 or by wireless transmission. Wireless capable device 524 may then read the tire pressure of main gear at the nose gear hubcap 504. Similarly, nose gear tire pressure may be measured by TPS 506 and sent from nose gear hubcap 504 to main gear hubcap 514. Main gear hubcap 514 may then transmit the tire pressure of a nose gear wheel measured by TPS 506. As a further example, TPS 506 may measure the tire pressure on the left nose gear wheel and send the measurement through the left nose gear hubcap 504 to the right nose gear hubcap 504. IR LED 522 on the right nose gear hubcap 504 may then transmit the pressure measurement from the left TPS 506. Thus, any tire pressure measurement from any tire on the aircraft may be sent to any main gear hubcap 514 or nose gear hubcap 504 and transmitted by an IR LED 522. A single nose gear hubcap 504 or main gear hubcap 514 may transmit the tire pressure measurements taken by each of TPS 506 or TPS 516.
Other wireless protocols may also be used to transmit tire pressure from nose gear hubcap 504 or main gear hubcap 514 to wireless capable device 524 or other devices, for example, a wireless Ethernet network (e.g., an ad hoc network utilizing IEEE 802.11a/b/g/n/ac), a wireless communications protocol using short wavelength UHF radio waves and defined at least in part by IEEE 802.15.1 (e.g., the BLUETOOTH protocol maintained by Bluetooth Special Interest Group), a low power wireless protocol such as Bluetooth Smart, inductive coupling, near field communication (NFC), or other radio frequency (RF) signals.
Benefits, other advantages, and solutions to problems have been described herein with regard to specific embodiments. Furthermore, the connecting lines shown in the various figures contained herein are intended to represent exemplary functional relationships and/or physical couplings between the various elements. It should be noted that many alternative or additional functional relationships or physical connections may be present in a practical system. However, the benefits, advantages, solutions to problems, and any elements that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as critical, required, or essential features or elements of the inventions. The scope of the inventions is accordingly to be limited by nothing other than the appended claims, in which reference to an element in the singular is not intended to mean “one and only one” unless explicitly so stated, but rather “one or more.” Moreover, where a phrase similar to “at least one of A, B, or C” is used in the claims, it is intended that the phrase be interpreted to mean that A alone may be present in an embodiment, B alone may be present in an embodiment, C alone may be present in an embodiment, or that any combination of the elements A, B and C may be present in a single embodiment; for example, A and B, A and C, B and C, or A and B and C.
Systems, methods and apparatus are provided herein. In the detailed description herein, references to “various embodiments”, “one embodiment”, “an embodiment”, “an example embodiment”, etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described. After reading the description, it will be apparent to one skilled in the relevant art(s) how to implement the disclosure in alternative embodiments.
Furthermore, no element, component, or method step in the present disclosure is intended to be dedicated to the public regardless of whether the element, component, or method step is explicitly recited in the claims. No claim element herein is to be construed under the provisions of 35 U.S.C. 112(f), unless the element is expressly recited using the phrase “means for.” As used herein, the terms “comprises”, “comprising”, or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
