WO2010145830A1 - Anordnung zum bestimmen des druckes in einem fahrwerksreifen eines luftfahrzeugs - Google Patents
Anordnung zum bestimmen des druckes in einem fahrwerksreifen eines luftfahrzeugs Download PDFInfo
- Publication number
- WO2010145830A1 WO2010145830A1 PCT/EP2010/003675 EP2010003675W WO2010145830A1 WO 2010145830 A1 WO2010145830 A1 WO 2010145830A1 EP 2010003675 W EP2010003675 W EP 2010003675W WO 2010145830 A1 WO2010145830 A1 WO 2010145830A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pressure
- tire
- chassis
- aircraft
- tires
- Prior art date
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
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2010262071A AU2010262071A1 (en) | 2009-06-17 | 2010-06-17 | Assembly for determining the pressure in a landing gear tire of an aircraft |
EP10725625A EP2443429A1 (de) | 2009-06-17 | 2010-06-17 | Anordnung zum bestimmen des druckes in einem fahrwerksreifen eines luftfahrzeugs |
JP2012515396A JP2012530250A (ja) | 2009-06-17 | 2010-06-17 | 航空機の着陸タイヤ内の圧力を測定するアッセンブリ |
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 |
DE102009025245.2 | 2009-06-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010145830A1 true WO2010145830A1 (de) | 2010-12-23 |
Family
ID=43033106
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2010/003675 WO2010145830A1 (de) | 2009-06-17 | 2010-06-17 | Anordnung zum bestimmen des druckes in einem fahrwerksreifen eines luftfahrzeugs |
Country Status (6)
Country | Link |
---|---|
US (1) | US8375781B2 (de) |
EP (1) | EP2443429A1 (de) |
JP (1) | JP2012530250A (de) |
AU (1) | AU2010262071A1 (de) |
DE (1) | DE102009025245A1 (de) |
WO (1) | WO2010145830A1 (de) |
Families Citing this family (5)
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 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0656269A1 (de) | 1993-12-02 | 1995-06-07 | Exxon Research And Engineering Company | Reifendruckfühler |
WO2000011442A1 (en) * | 1998-08-21 | 2000-03-02 | Blueground Research Limited | Apparatus and method for tyre pressure measurement |
WO2006003467A1 (en) * | 2004-07-07 | 2006-01-12 | Wheelright Limited | Vehicle tyre checking system |
WO2008034411A1 (de) | 2006-09-19 | 2008-03-27 | Ventech Gmbh | System zum feststellen des druckes in einem fahrzeugreifen und/oder der geschwindigkeit des fahrzeuges |
WO2008034414A1 (de) | 2006-09-19 | 2008-03-27 | Ventech Gmbh | Verfahren zum bestimmen des druckes in einem pneumatischen fahrzeugreifen |
Family Cites Families (11)
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 |
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. |
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 |
CA2487704A1 (en) * | 2004-11-18 | 2006-05-18 | R. Kyle Schmidt | Method and system for health monitoring of aircraft landing gear |
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 |
-
2009
- 2009-06-17 DE DE102009025245A patent/DE102009025245A1/de not_active Ceased
-
2010
- 2010-06-17 WO PCT/EP2010/003675 patent/WO2010145830A1/de active Application Filing
- 2010-06-17 JP JP2012515396A patent/JP2012530250A/ja active Pending
- 2010-06-17 US US12/818,027 patent/US8375781B2/en not_active Expired - Fee Related
- 2010-06-17 EP EP10725625A patent/EP2443429A1/de not_active Withdrawn
- 2010-06-17 AU AU2010262071A patent/AU2010262071A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0656269A1 (de) | 1993-12-02 | 1995-06-07 | Exxon Research And Engineering Company | Reifendruckfühler |
WO2000011442A1 (en) * | 1998-08-21 | 2000-03-02 | Blueground Research Limited | Apparatus and method for tyre pressure measurement |
WO2006003467A1 (en) * | 2004-07-07 | 2006-01-12 | Wheelright Limited | Vehicle tyre checking system |
WO2008034411A1 (de) | 2006-09-19 | 2008-03-27 | Ventech Gmbh | System zum feststellen des druckes in einem fahrzeugreifen und/oder der geschwindigkeit des fahrzeuges |
WO2008034414A1 (de) | 2006-09-19 | 2008-03-27 | Ventech Gmbh | Verfahren zum bestimmen des druckes in einem pneumatischen fahrzeugreifen |
Also Published As
Publication number | Publication date |
---|---|
AU2010262071A1 (en) | 2011-12-15 |
EP2443429A1 (de) | 2012-04-25 |
US20110185802A1 (en) | 2011-08-04 |
JP2012530250A (ja) | 2012-11-29 |
DE102009025245A1 (de) | 2010-12-30 |
US8375781B2 (en) | 2013-02-19 |
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