EP2443429A1 - Système pour déterminer la pression dans un pneu de train d'atterrissage d'avion - Google Patents

Système pour déterminer la pression dans un pneu de train d'atterrissage d'avion

Info

Publication number
EP2443429A1
EP2443429A1 EP10725625A EP10725625A EP2443429A1 EP 2443429 A1 EP2443429 A1 EP 2443429A1 EP 10725625 A EP10725625 A EP 10725625A EP 10725625 A EP10725625 A EP 10725625A EP 2443429 A1 EP2443429 A1 EP 2443429A1
Authority
EP
European Patent Office
Prior art keywords
pressure
tire
chassis
aircraft
tires
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10725625A
Other languages
German (de)
English (en)
Inventor
Manfred Paul
Stefan SCHÖLLMANN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lufthansa Technik AG
Original Assignee
Lufthansa Technik AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lufthansa Technik AG filed Critical Lufthansa Technik AG
Publication of EP2443429A1 publication Critical patent/EP2443429A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L17/00—Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies
    • G01L17/005—Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies using a sensor contacting the exterior surface, e.g. for measuring deformation

Definitions

  • the invention relates to an arrangement for determining the pressure in a chassis tire of an aircraft, which has a measuring matrix with a plurality of load sensors arranged in a surface that can be rolled over by the chassis tire.
  • the invention also provides a method for determining the pressure in a chassis tire of an aircraft and a maintenance cycle for an aircraft.
  • the pressure of commercial airliners on commercial vehicles has to be checked on a regular basis as suspension tires are subjected to high loads during take-offs and, in particular, landings.
  • This tire pressure control is usually carried out as part of the so-called Z-Check every 24 h for short-haul aircraft or possibly every 49 h for long-haul aircraft. This is expensive, since often the test of the tire pressure is the only checkpoint in the Z-Check and extra requires the approach of a mechanic to the parked aircraft.
  • the invention has for its object to provide an arrangement and a method or one of the requirements of Enable sufficient monitoring of the tire pressure of chassis tires.
  • the arrangement according to the invention is designed to measure the pressure difference between two or more chassis tires.
  • pressure differences between two or more chassis tires of an axle can be measured.
  • the invention has recognized that in the context of the Z-checks, the test for possible damage or irregularities on individual chassis tires is of particular importance, which often manifests itself in a higher pressure drop.
  • an additional manual check of the tire pressure or of the tires can also be initiated, when actually the absolute pressure of all tires is still within a predetermined tolerance range, but the pressure loss of comparable tires is different.
  • differential pressure determination Another advantage of this differential pressure determination is that this can be done with relatively high accuracy, since for example two tires should show an identical load profile on an axis at the same pressure and temperature and thus a deviation in the load profile will often be a direct indicator of a corresponding pressure difference ,
  • the technology for determining the internal pressure of a tire from the load profile of a measuring matrix when rolling over this measuring matrix is basically known in the prior art and described, for example, in the three published patent applications mentioned above.
  • a matrix of load sensors absorbs a distribution of the force exerted on the individual sensors when the tire contact surface rolls over. From this force or load distribution and known other parameters (such as weight or axle load of the aircraft) can be deduced on the tire pressure.
  • the surface of a single load sensor is significantly smaller than the footprint of a rolling chassis tire.
  • the invention has at least one temperature sensor for measuring the tire temperature.
  • the determination of the tire pressure from the load profile of the tire of the measuring matrix of the load sensors can be made sufficiently accurate to allow a determination of the tire pressure sufficient for the requirements of aviation.
  • This temperature determination in the course of the indirect pressure measurement on the load profile is of particular importance in the aviation sector, since the chassis tires are exposed to considerable thermal stresses during take-offs and in particular during landings and the subsequent braking operation.
  • the invention makes it possible for these thermal stresses and the resulting temperature changes of the tires to be taken into account in the pressure determination and thus permits, for example, a pressure determination shortly after landing during the taxiing of the aircraft to the gate.
  • the temperature sensor can either come into direct contact with the running surface during the rolling over of the tire and measure its temperature or it can be a sensor which performs a non-contact temperature measurement.
  • a pyrometer or thermal imager can be used.
  • the temperature sensor can be arranged within the measuring matrix or in a roll-over edge region of the arrangement with the measuring matrix.
  • both the combination of the differential pressure measurement with the temperature measurement or the temperature sensor and the differential pressure measurement without a temperature sensor or a temperature measurement are essential to the invention and are encompassed by the disclosure.
  • the invention further relates to an airport which has at least one arrangement according to the invention in the runway.
  • tarmac includes any area of the airport where aircraft are parked or (preferably) taxied over the aircraft on their way between runway and parking position or gate.
  • the arrangement is located in a central area of the runway, over which many or all Rolling aircraft on their way to or from the gate, the required tire pressure monitoring in a Z-Check can be done without extra time or mechanics during the rolling process.
  • the invention further provides a method for determining the pressure in one or more landing gear tires of an aircraft using an arrangement according to the invention.
  • the method comprises the following steps:
  • the differential pressure measurement already described above between two or more chassis tires is used.
  • the comparison of the pressure of two or more chassis tires on one axle is possible. Since at unequal pressure of two tires on one axis of the tire with the higher pressure is significantly more stressed and thus wear much faster, this differential pressure can determine the life of a set of chassis tires increase.
  • the temperature of the chassis tire within the scope of the possible measurement accuracy and to allow the temperature value to be included in the calculation of the tire pressure.
  • the so-called Aircraft Maintenance Manuals of an aircraft usually give tire pressure setpoints for the tire temperature cold or lukewarm.
  • the tire may have one or more grooves which are detected as an area of lesser load when rolling over the measuring matrix in the measured load profile. If such a groove is largely or completely worn down, the load profile changes accordingly, so that the state of wear of the tire can be deduced.
  • chassis tires are used whose track width changes over the depth of the track (for example, an approximately V-shaped track profile), so that a statement about the state of wear of the tires before reaching the wear limit due to continuously changing load profile is possible.
  • the invention also provides a maintenance cycle for an aircraft, comprising the following steps:
  • step b) evaluation of the measurement results from step b) for determining whether the pressure of at least one tire falls below a lower limit value and / or whether the pressure differences between two or more chassis tires exceed an upper tolerance value
  • Such a maintenance cycle allows safe and cost-effective operation of an aircraft.
  • the permissible lower limit for the operation of the chassis tires is 80% of the nominal pressure.
  • the pressure loss in a chassis tire should amount to a maximum of 5% in 24 h, a typical empirical value of practice is about 2%.
  • a maintenance cycle with an operation of the aircraft over a maximum of 96 h to carry out the next tire pressure control thus ensures that the technically permissible lower limit (the lower limit value) of the tire pressure is not undershot.
  • Preferred periods between two tire pressure controls are 24 to 72 hours, more preferably 24 or 48 hours. In the context of the invention, it is possible, for example, after 96 h in each case an additional manual control of the tires and possibly a filling with gas (preferably nitrogen) takes place.
  • a range of 80 to 95% of the nominal pressure preferably 85 to 90% of the nominal pressure can be applied.
  • a difference of 5% or less more preferably 4, 3 or 2% or less may be used.
  • a schematically indicated at 1 measuring matrix of load sensors is arranged, whose largest extension is arranged transversely to the intended rolling direction 2 of an overlying aircraft 3.
  • the width of the measurement matrix transversely to the taxiway 2 corresponds at least to the chassis width of an aircraft rolling over it, so that when an aircraft is rolling over the measurement matrix 1 in the middle on the taxiway 2, all the chassis tires will roll over the load sensors of the measurement matrix.
  • temperature sensors not shown in the drawing are arranged, which measure the temperature of a rolling tire.
  • the measurement results are transmitted wirelessly by means of an antenna indicated at 4 to an evaluation unit 5, which evaluates the measurement results transmitted by the load sensors of the measurement matrix 1 and displays them in the desired manner.
  • the measurement results of the temperature sensors are transmitted accordingly and flow into the evaluation.
  • the measurement matrix 1 can be assigned a device for detecting the overrunning aircraft, for example a camera which reads the aircraft identifier from the tailplane and transmits it to the evaluation unit 5.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Tires In General (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

L'invention concerne un système pour déterminer la pression dans un pneu de train d'atterrissage d'avion, qui comporte une matrice de mesure (1) comprenant plusieurs capteurs de charge situés dans une surface sur laquelle les pneus du train d'atterrissage peuvent rouler. Selon l'invention, ce système est conçu pour mesurer la différence de pression entre au moins deux pneus du train d'atterrissage.
EP10725625A 2009-06-17 2010-06-17 Système pour déterminer la pression dans un pneu de train d'atterrissage d'avion Withdrawn EP2443429A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009025245A DE102009025245A1 (de) 2009-06-17 2009-06-17 Anordnung zum Bestimmen des Druckes in einem Fahrwerksreifen eines Luftfahrzeugs
PCT/EP2010/003675 WO2010145830A1 (fr) 2009-06-17 2010-06-17 Système pour déterminer la pression dans un pneu de train d'atterrissage d'avion

Publications (1)

Publication Number Publication Date
EP2443429A1 true EP2443429A1 (fr) 2012-04-25

Family

ID=43033106

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10725625A Withdrawn EP2443429A1 (fr) 2009-06-17 2010-06-17 Système pour déterminer la pression dans un pneu de train d'atterrissage d'avion

Country Status (6)

Country Link
US (1) US8375781B2 (fr)
EP (1) EP2443429A1 (fr)
JP (1) JP2012530250A (fr)
AU (1) AU2010262071A1 (fr)
DE (1) DE102009025245A1 (fr)
WO (1) WO2010145830A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8718868B2 (en) * 2011-06-30 2014-05-06 GM Global Technology Operations LLC Vehicle using tire temperature to adjust active chassis systems
US9678029B2 (en) 2014-08-22 2017-06-13 Honeywell International Inc. Oxidation catalyst detector for aircraft components
US10773797B2 (en) * 2014-12-04 2020-09-15 Borealis Technical Limited Method for using aircraft wheel tyre pressure to improve aircraft energy efficiency and drive system performance
CN105252973B (zh) * 2015-10-16 2017-04-05 北汽福田汽车股份有限公司 用于汽车的温度监控方法、装置及设备
CN111361363B (zh) * 2019-08-29 2020-09-18 山东航空股份有限公司 飞机轮胎气压智能测量系统及方法

Family Cites Families (16)

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Publication number Priority date Publication date Assignee Title
FR2485192A1 (fr) * 1980-06-19 1981-12-24 Telecommunications Sa Procede et dispositif pour mesurer la pression de pneumatiques notamment pour aeronefs
US4506328A (en) * 1982-07-30 1985-03-19 Sundstrand Data Control, Inc. Static low tire pressure detection system for aircraft
JP2764468B2 (ja) * 1990-11-21 1998-06-11 横浜ゴム株式会社 回転体の接地圧測定方法および装置
US5445020A (en) 1991-11-29 1995-08-29 Exxon Research And Engineering Company Tire inflation sensor
CH689599A5 (de) * 1993-11-23 1999-06-30 Kk Holding Ag Aufnehmer-Anordnung zum Einbau in Fahrbahnen zwecks Erfassung der Gewichte und/oder der fahrdynamischen Reaktionen von Fahrzeugrädern.
GB9818254D0 (en) * 1998-08-21 1998-10-14 Blueground Res Ltd Methods of and apparatus for tyre pressure measurement
US6823728B1 (en) * 2002-03-12 2004-11-30 Elwood E. Barnes Systems and methods for measurement of tire pressure
DE10218781A1 (de) * 2002-04-26 2003-11-13 Tuev Automotive Gmbh Auf einer Felge montierbarer Luftreifen, Sensornetz, Umdrehungsmesseinheit und Fahrzeugüberwachungssystem
JP2005096609A (ja) * 2003-09-25 2005-04-14 Sumitomo Electric Ind Ltd タイヤ空気圧監視システム
DE10360122C5 (de) * 2003-12-20 2016-01-07 Patentportfolio S. à. r. l. Verfahren zur Drucküberwachung von Kraftfahrzeugreifen
GB0415258D0 (en) * 2004-07-07 2004-08-11 Wheelright Ltd Vehicle tyre checking system
CA2487704A1 (fr) * 2004-11-18 2006-05-18 R. Kyle Schmidt Methode et systeme de surveillance de l'etat des trains d'atterrissage
US7343787B2 (en) * 2005-05-19 2008-03-18 Oguzhan Oflaz Piezoelectric tire sensor and method
US20080033607A1 (en) * 2006-06-01 2008-02-07 Bob Zeliff Monitoring system for aircraft landing system
DK2064532T3 (da) 2006-09-19 2010-05-17 Ventech Gmbh System til konstatering af trykket i et køretøjs dæk og/eller køretøjets hastighed
DE112007002832A5 (de) 2006-09-19 2009-09-03 Ventech Gmbh Verfahren zum Bestimmen des Druckes in einem pneumatischen Fahrzeugreifen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010145830A1 *

Also Published As

Publication number Publication date
DE102009025245A1 (de) 2010-12-30
AU2010262071A1 (en) 2011-12-15
US20110185802A1 (en) 2011-08-04
US8375781B2 (en) 2013-02-19
JP2012530250A (ja) 2012-11-29
WO2010145830A1 (fr) 2010-12-23

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