FR2851334A1 - Aircraft torque shaft angular deformation measuring device has magnetic readers which are opposite poles of an induction sensor comprising an inductance coil wound around a core joining the poles - Google Patents
Aircraft torque shaft angular deformation measuring device has magnetic readers which are opposite poles of an induction sensor comprising an inductance coil wound around a core joining the poles Download PDFInfo
- Publication number
- FR2851334A1 FR2851334A1 FR0301802A FR0301802A FR2851334A1 FR 2851334 A1 FR2851334 A1 FR 2851334A1 FR 0301802 A FR0301802 A FR 0301802A FR 0301802 A FR0301802 A FR 0301802A FR 2851334 A1 FR2851334 A1 FR 2851334A1
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- FR
- France
- Prior art keywords
- poles
- angular deformation
- induction sensor
- inductance coil
- measuring device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
- G01L3/105—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving inductive means
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Description
DISPOSITIF DE MESURE DE DEFORMATION ANGULAIRE D'UN ARBRE DE TORSIONDEVICE FOR MEASURING ANGULAR DEFORMATION OF A TORSION SHAFT
D'AERONEFAIRCRAFT
DESCRIPTIONDESCRIPTION
Cette invention a trait à un dispositif de mesure de déformation angulaire d'un arbre de torsion. This invention relates to a device for measuring the angular deformation of a torsion shaft.
Elle peut trouver emploi dans des moteurs d'aéronef, o on désire souvent mesurer les efforts exercés pour entraîner une hélice au moyen de la déformation 10 angulaire d'un arbre menant à cette hélice. It can be used in aircraft engines, where it is often desired to measure the forces exerted to drive a propeller by means of the angular deformation of a shaft leading to this propeller.
Un dispositif classique consiste à munir deux sections opposées de l'arbre de disques dentés dont des lecteurs magnétiques respectifs suivent la rotation. chaque passage de dent, un signal parcourt le lecteur 15 concerné. Le décalage de phase entre les signaux exprime un angle de déformation de l'arbre entre les deux sections porteuses des disques, et cet angle est proportionnel au couple appliqué à l'hélice. Un exemple d'un tel dispositif est décrit dans le brevet français 20 2 631 700. A conventional device consists in providing two opposite sections of the toothed disc shaft whose respective magnetic readers follow the rotation. each tooth passage, a signal travels through the reader 15 concerned. The phase shift between the signals expresses a deformation angle of the shaft between the two bearing sections of the discs, and this angle is proportional to the torque applied to the propeller. An example of such a device is described in French patent 20 2,631,700.
Un inconvénient de ce genre de dispositif est que la discrimination des signaux indicateurs du passage d'une des dents n'est pas facile à faire quand l'angle de déphasage est petit. A disadvantage of this type of device is that the discrimination of the signals indicating the passage of one of the teeth is not easy to do when the phase angle is small.
On a donc cherché, en concevant cette invention, à rendre la mesure plus facile. We have therefore sought, by designing this invention, to make the measurement easier.
Pour résumer, l'invention est relative à un dispositif de mesure de déformation angulaire d'un arbre de torsion, qui comprend une paire de disques 30 dentés liés à des sections différentes de l'arbre et des lecteurs magnétiques situés respectivement devant SP 21350/JCI les disques; elle est caractérisée en ce que les lecteurs sont des pôles opposés d'un même capteur à induction comprenant un noyau joignant lesdits pôles et muni d'un bobinage récepteur, qui est unique et commun aux deux lecteurs. To summarize, the invention relates to a device for measuring the angular deformation of a torsion shaft, which comprises a pair of toothed discs 30 linked to different sections of the shaft and magnetic readers located respectively in front of SP 21350 / JCI records; it is characterized in that the readers are opposite poles of the same induction sensor comprising a core joining said poles and provided with a receiving coil, which is unique and common to the two readers.
L'avantage fondamental que procure l'invention est que les signaux obtenus à la rotation des disques sont opposés, ce qui permet de les mieux distinguer avec un dispositif unique, même s'ils se chevauchent 10 partiellement. The fundamental advantage afforded by the invention is that the signals obtained from the rotation of the discs are opposite, which makes it possible to better distinguish them with a single device, even if they overlap partially.
L'invention sera maintenant décrite au moyen des figures. La figure 1 représente un dispositif conforme à l'invention, la figure 2 représente une vue plus générale d'un appareillage à mesure de déformation 15 angulaire d'un arbre et la figure 3 illustre les signaux obtenus. The invention will now be described by means of the figures. FIG. 1 represents a device according to the invention, FIG. 2 represents a more general view of an apparatus for angular deformation measurement of a shaft and FIG. 3 illustrates the signals obtained.
Se reportant à la figure 1, on aperçoit un arbre 1 muni de disques 2 et 3 parallèles à des sections différentes, et qui servent à mesurer la déformation 20 angulaire de l'arbre 1 entre eux. Les disques 2 et 3 sont semblables et munis de reliefs sous forme de dents 4. Deux lecteurs magnétiques 5 et 6 sont disposés près de la circonférence des disques 2 et 3 respectivement. Referring to Figure 1, there is a shaft 1 provided with discs 2 and 3 parallel to different sections, and which are used to measure the angular deformation 20 of the shaft 1 between them. The discs 2 and 3 are similar and provided with reliefs in the form of teeth 4. Two magnetic readers 5 and 6 are arranged near the circumference of the discs 2 and 3 respectively.
Ils consistent en les pôles d'un même appareil de 25 lecture qui comprend encore un noyau 7 joignant les pôles 5 et 6 et autour duquel est enroulé un bobinage inducteur 8 dont un circuit d'exploitation 9 est disposé aux bornes du bobinage 8. They consist of the poles of the same reading device which also comprises a core 7 joining the poles 5 and 6 and around which an inductor winding 8 is wound, an operating circuit 9 of which is arranged at the terminals of the winding 8.
On passe à l'examen de la figure 2. L'arbre 1 est 30 disposé entre une hélice 10 d'un moteur d'avion et un générateur des gaz 11 qui entraîne l'hélice 10 par SP 21350/JCI l'intermédiaire de l'arbre 1. L'un des disques 2 est disposé à une extrémité de l'arbre 1, près du générateur des gaz 11, alors que l'autre des disques 3 est solidaire de la section de l'arbre 2 qui est 5 adjacente à l'hélice 10, mais il est en réalité monté sur une entretoise 12 qui couvre la plus grande partie de l'arbre 1, afin d'être placé près du disque précédent 2. We pass to the examination of FIG. 2. The shaft 1 is arranged between a propeller 10 of an aircraft engine and a gas generator 11 which drives the propeller 10 by SP 21350 / JCI through the shaft 1. One of the discs 2 is disposed at one end of the shaft 1, near the gas generator 11, while the other of the discs 3 is integral with the section of the shaft 2 which is 5 adjacent to the propeller 10, but it is actually mounted on a spacer 12 which covers most of the shaft 1, in order to be placed near the previous disc 2.
La figure 3 illustre des signaux obtenus. Quand 10 une dent 4 du disque 2 passe devant le lecteur 5, une impulsion 15 est enregistrée par le circuit d'exploitation 9 du capteur. Quand une dent 4 de l'autre des disques 3 passe devant l'autre des lecteurs 6, le circuit d'exploitation 9 du capteur enregistre 15 une autre impulsion 16 symétrique de la précédente puisqu'elle est enregistrée par le même bobinage 8, mais qui est placé symétriquement par rapport au pôle de lecture. Figure 3 illustrates signals obtained. When a tooth 4 of the disc 2 passes in front of the reader 5, a pulse 15 is recorded by the operating circuit 9 of the sensor. When a tooth 4 of the other of the discs 3 passes in front of the other of the readers 6, the operating circuit 9 of the sensor 15 records another pulse 16 symmetrical with the previous one since it is recorded by the same coil 8, but which is placed symmetrically with respect to the reading pole.
La durée Tl séparant les impulsions 15 et 16, 20 rapportée à la durée T2 séparant deux impulsions 15 ou deux impulsions 16 de même genre consécutives, est égale au rapport entre la déformation angulaire de l'arbre 1 et le pas séparant deux dents successives. The duration T1 separating the pulses 15 and 16, 20 referred to the duration T2 separating two pulses 15 or two pulses 16 of the same kind consecutive, is equal to the ratio between the angular deformation of the shaft 1 and the pitch separating two successive teeth.
Un autre avantage procuré par l'invention est que 25 le circuit d'exploitation 9 et le moyen sensible (le bobinage 8) sont uniques, ce qui simplifie le dispositif. Another advantage provided by the invention is that the operating circuit 9 and the sensitive means (the winding 8) are unique, which simplifies the device.
Il faut enfin remarquer que le capteur se prête bien aux réglages, en tournant le noyau 7 pour placer 30 les lecteurs 5 et 6 en phase devant les dents 4 des disques 2 et 3. Finally, it should be noted that the sensor lends itself well to adjustments, by turning the core 7 to place the readers 5 and 6 in phase in front of the teeth 4 of the disks 2 and 3.
SP 21350/JCISP 21350 / JCI
Claims (1)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0301802A FR2851334B1 (en) | 2003-02-14 | 2003-02-14 | DEVICE FOR MEASURING ANGULAR DEFORMATION OF AN AIRCRAFT TORSION ARBOR. |
PCT/FR2004/000104 WO2004067215A2 (en) | 2003-01-17 | 2004-01-19 | Device for measuring the angular deformation of an aircraft torque shaft |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0301802A FR2851334B1 (en) | 2003-02-14 | 2003-02-14 | DEVICE FOR MEASURING ANGULAR DEFORMATION OF AN AIRCRAFT TORSION ARBOR. |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2851334A1 true FR2851334A1 (en) | 2004-08-20 |
FR2851334B1 FR2851334B1 (en) | 2005-06-03 |
Family
ID=32749575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR0301802A Expired - Lifetime FR2851334B1 (en) | 2003-01-17 | 2003-02-14 | DEVICE FOR MEASURING ANGULAR DEFORMATION OF AN AIRCRAFT TORSION ARBOR. |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2851334B1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2457700A (en) * | 1942-12-09 | 1948-12-28 | Gen Motors Corp | Torque meter |
US3329012A (en) * | 1963-11-08 | 1967-07-04 | Schaevitz Engineering | Torsion measuring device |
US4682505A (en) * | 1985-12-13 | 1987-07-28 | Pratt & Whitney Canada Inc. | Compact torque measurement system |
-
2003
- 2003-02-14 FR FR0301802A patent/FR2851334B1/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2457700A (en) * | 1942-12-09 | 1948-12-28 | Gen Motors Corp | Torque meter |
US3329012A (en) * | 1963-11-08 | 1967-07-04 | Schaevitz Engineering | Torsion measuring device |
US4682505A (en) * | 1985-12-13 | 1987-07-28 | Pratt & Whitney Canada Inc. | Compact torque measurement system |
Also Published As
Publication number | Publication date |
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FR2851334B1 (en) | 2005-06-03 |
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