CA2479460A1 - Optical axle deflector sensor - Google Patents
Optical axle deflector sensor Download PDFInfo
- Publication number
- CA2479460A1 CA2479460A1 CA 2479460 CA2479460A CA2479460A1 CA 2479460 A1 CA2479460 A1 CA 2479460A1 CA 2479460 CA2479460 CA 2479460 CA 2479460 A CA2479460 A CA 2479460A CA 2479460 A1 CA2479460 A1 CA 2479460A1
- Authority
- CA
- Canada
- Prior art keywords
- sensor
- axle
- optical axle
- deflector sensor
- axle deflector
- 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.)
- Abandoned
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/125—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing wherein the weighing element is an optical member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
- G01G19/07—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing aircraft
Description
Page 1 of Messier-Dowty Invention Disclosure sr~ecma groin Title: Optical Axle Deflection Sensor Project Number:
Description and Sketches:
An axle deflection sensor that employs a light beam emitting device (a light emitting diode or LASER) and a light point sensing device (a position sensitive device or an image sensor). The sensor and emitter are mounted to the axle (essentially a beam) such that they are spaced apart a distance and aimed at each other such that at no deflection, the light beam projects a dot on the center of the sensor. When the beam is deflected; the light d~t rriovestproportional to the deflection. Measurement of the position of the light dot is correlated to the deflection of flie axle:
Deflection of the axle is correlated to the force applied to~tiie ~axle.~ 4 In this manner, use of the sensor is possible to defermine axle loads, for instance on an aircraft landing gear.
The use of a two dimensional light sensor allowsthe beam deflections to be characterized in two dimensions (for instance, up and down; and fore and aft). These deflections are correlated to, for instance; aircraft vertical load (or weight) and drag' loads (for instance from braking).
Other variations of the invention include the use of prisms or refractive lenses to provide a gain signal and increase the possible measuring resolution: Another facet of the invention involves the use of mirrors, plane or having specific curvatures such that the emitter and detector devices may be placed on the same electronic circuit board. A mirror with a specific curvature may provide the capability to combine the ar~npliflcatiori of deflectiorifunction along with the foldin of the light beam such That the electronics may be mounted togethelr.
A further variation includes the provision of thermal heater elements or cooler elements (such as a Pettier junction) to stabilize, under elecfronic control, the~ytemparature~of the emitter and detector: This is imporkant in applications such as an aircraftlan~ing gear axle where severe cold and severe heat (due to braking) cari be realized.
/ ~~,~~.o ,I ~,~ ~,,~n _ _ _ _ _ . _. _ ._ _ ~ -- .
., CtI vtTtr~ L.i GH ~- P14t11 ' ;' DC-FLEct-t-Ci S'I"I~TE
."'.'~ . _ _. ~
Additional pages? ; # of pages -Inventors: Explained to and l~nderstood by:
Description and Sketches:
An axle deflection sensor that employs a light beam emitting device (a light emitting diode or LASER) and a light point sensing device (a position sensitive device or an image sensor). The sensor and emitter are mounted to the axle (essentially a beam) such that they are spaced apart a distance and aimed at each other such that at no deflection, the light beam projects a dot on the center of the sensor. When the beam is deflected; the light d~t rriovestproportional to the deflection. Measurement of the position of the light dot is correlated to the deflection of flie axle:
Deflection of the axle is correlated to the force applied to~tiie ~axle.~ 4 In this manner, use of the sensor is possible to defermine axle loads, for instance on an aircraft landing gear.
The use of a two dimensional light sensor allowsthe beam deflections to be characterized in two dimensions (for instance, up and down; and fore and aft). These deflections are correlated to, for instance; aircraft vertical load (or weight) and drag' loads (for instance from braking).
Other variations of the invention include the use of prisms or refractive lenses to provide a gain signal and increase the possible measuring resolution: Another facet of the invention involves the use of mirrors, plane or having specific curvatures such that the emitter and detector devices may be placed on the same electronic circuit board. A mirror with a specific curvature may provide the capability to combine the ar~npliflcatiori of deflectiorifunction along with the foldin of the light beam such That the electronics may be mounted togethelr.
A further variation includes the provision of thermal heater elements or cooler elements (such as a Pettier junction) to stabilize, under elecfronic control, the~ytemparature~of the emitter and detector: This is imporkant in applications such as an aircraftlan~ing gear axle where severe cold and severe heat (due to braking) cari be realized.
/ ~~,~~.o ,I ~,~ ~,,~n _ _ _ _ _ . _. _ ._ _ ~ -- .
., CtI vtTtr~ L.i GH ~- P14t11 ' ;' DC-FLEct-t-Ci S'I"I~TE
."'.'~ . _ _. ~
Additional pages? ; # of pages -Inventors: Explained to and l~nderstood by:
2~~s 2~~
igna ure Date Printed Name arid Signature Date ~.., , _9 __.. _ __N . ; , _~. .g.., _ .. ~,t .. . . ,. _ . ~. _ ,.wt ,::
Si nature Date Panted Name and Sr nature Date INSTRUCTIONS TO INVENTORS:
1. Select a short tifle that describes the main feature of your invention.
2. Provide a concise abstract of tfie invention. ~'~'e'absfract'should convey a clear uniierstandin to the extent'kn w r g, o n, of the nature, purpose, operation, and the physical, chemical biologicat~ or electricahcfiaractenstics of the invention.
igna ure Date Printed Name arid Signature Date ~.., , _9 __.. _ __N . ; , _~. .g.., _ .. ~,t .. . . ,. _ . ~. _ ,.wt ,::
Si nature Date Panted Name and Sr nature Date INSTRUCTIONS TO INVENTORS:
1. Select a short tifle that describes the main feature of your invention.
2. Provide a concise abstract of tfie invention. ~'~'e'absfract'should convey a clear uniierstandin to the extent'kn w r g, o n, of the nature, purpose, operation, and the physical, chemical biologicat~ or electricahcfiaractenstics of the invention.
3. In the description state the principal objective of your invention.
° w r. _.. r .
° w r. _.. r .
4. Describe the construction and operation of your invention. Use sketches if possible and refer to numbered features on your sketches.
Use additional sheets 'rf necessary.
Use additional sheets 'rf necessary.
5. Indicate any alternate methods of constnrction.
6. Indicate the features you believe to be novel.
7. If a joint invention and where determinable, indicate what contribution each inventor made.
8. This form and all additional descriptions and sketches must be signed and dated by the inventor s and b two witnesses.
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9. Complete questionnaire on the reverse of this page..
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Claims
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2479460 CA2479460A1 (en) | 2004-08-30 | 2004-08-30 | Optical axle deflector sensor |
| US11/573,218 US8181532B2 (en) | 2004-08-30 | 2005-08-30 | Structural deflection and load measuring device |
| PCT/CA2005/001304 WO2006024146A1 (en) | 2004-08-30 | 2005-08-30 | Structural deflection and load measuring device |
| CA2576805A CA2576805C (en) | 2004-08-30 | 2005-08-30 | Structural deflection and load measuring device |
| EP05778712.9A EP1784614B1 (en) | 2004-08-30 | 2005-08-30 | Structural deflection and load measuring device |
| BRPI0514602-0A BRPI0514602A (en) | 2004-08-30 | 2005-08-30 | deflection and structural load measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2479460 CA2479460A1 (en) | 2004-08-30 | 2004-08-30 | Optical axle deflector sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2479460A1 true CA2479460A1 (en) | 2006-02-28 |
Family
ID=35997694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2479460 Abandoned CA2479460A1 (en) | 2004-08-30 | 2004-08-30 | Optical axle deflector sensor |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2479460A1 (en) |
-
2004
- 2004-08-30 CA CA 2479460 patent/CA2479460A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |