FR2697081A1 - Wide range position indicator for movable vehicle accessories - uses two wheels having slightly different numbers of teeth driven by equivalent wheels on common shaft - Google Patents
Wide range position indicator for movable vehicle accessories - uses two wheels having slightly different numbers of teeth driven by equivalent wheels on common shaft Download PDFInfo
- Publication number
- FR2697081A1 FR2697081A1 FR9212603A FR9212603A FR2697081A1 FR 2697081 A1 FR2697081 A1 FR 2697081A1 FR 9212603 A FR9212603 A FR 9212603A FR 9212603 A FR9212603 A FR 9212603A FR 2697081 A1 FR2697081 A1 FR 2697081A1
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- 238000005259 measurement Methods 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000007650 screen-printing Methods 0.000 claims description 2
- 239000012780 transparent material Substances 0.000 claims description 2
- 230000005355 Hall effect Effects 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/02—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using mechanical means
- G01D5/04—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using mechanical means using levers; using cams; using gearing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/36—Forming the light into pulses
- G01D5/38—Forming the light into pulses by diffraction gratings
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Optical Transform (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
Description
La présente invention a pour objet un dispositif de codage à large étendue de mesure, destiné à la détermination de la position d'une pièce dans une course d'amplitude prédéterminée, par exemple un accessoire de véhicule automobile tel qu'un toit ouvrant, un dossier de siège etc. The subject of the present invention is a coding device with a large measurement range, intended for determining the position of a part in a stroke of predetermined amplitude, for example a motor vehicle accessory such as a sunroof, a seat back etc.
On connaît un codeur constitué par une roue rotative, à faible étendue de mesure, qui ne permet donc de régler la position de l'accessoire commandé que sur un nombre réduit de points. An encoder is known which consists of a rotating wheel, with a small measurement range, which therefore makes it possible to adjust the position of the controlled accessory only on a reduced number of points.
L'invention a pour but de réaliser un codeur à large étendue de mesure, en conservant la précision du codeur connu, afin de pouvoir régler avec une plus grande finesse la position dans sa course de l'accessoire commandé. The object of the invention is to produce an encoder with a large measurement range, while retaining the accuracy of the known encoder, in order to be able to adjust with greater finesse the position in its travel of the accessory ordered.
Conformément à l'invention, le dispositif de codage comprend deux roues codeuses "absolues" et une chaîne cinématique d'entraînement et de liaison entre celles-ci, lesquelles sont agencées de telle sorte que lorsqu'une première roue codeuse effectue (N) tours, la seconde roue codeuse effectue (N+1) tours, et ce dispositif comporte des moyens de calcul de la position "absolue" de chacune des roues codeuses dans la course totale de la pièce commandée à partir de la mesure du glissement (P1 - P2) de l'autre roue selon la relation
Pos (1) = K [P2 - P1] + P1 où P1 et P2 sont les positions angulaires des roues codeuses dans leur tour, K le coefficient de glissement relatif, K [P2 - P1] étant exprimé en nombre de tours.According to the invention, the coding device comprises two "absolute" coding wheels and a kinematic chain for driving and connecting between them, which are arranged so that when a first coding wheel makes (N) turns , the second coding wheel performs (N + 1) turns, and this device includes means for calculating the "absolute" position of each of the coding wheels in the total travel of the controlled part from the measurement of the slip (P1 - P2) of the other wheel according to the relation
Pos (1) = K [P2 - P1] + P1 where P1 and P2 are the angular positions of the encoder wheels in their turn, K the relative slip coefficient, K [P2 - P1] being expressed in number of turns.
L'expression "roue codeuse absolue" doit être comprise comme signifiant que l'on connaît à chaque instant la position de cette roue dans son cycle de révolution, dans un tour. The expression "absolute coding wheel" must be understood to mean that we know at all times the position of this wheel in its cycle of revolution, in one revolution.
Ainsi, on mesure le glissement entre les deux roues codeuses pour déterminer le nombre de tours effectué par celles-ci, à partir duquel la relation ci-dessus fournit la position absolue de l'une des roues, exprimée en unités appropriées, et corrélativement la position de l'accessoire commandé dans sa course. Thus, the slip between the two coding wheels is measured to determine the number of turns performed by them, from which the above relationship provides the absolute position of one of the wheels, expressed in appropriate units, and correlatively the position of the accessory ordered in its stroke.
Suivant diverses formes de réalisation de l'invention, les deux roues codeuses sont disposées soit côteà-côte, soit superposées et coaxiales, soit superposées et non coaxiales, différents types de pistes et de capteurs pouvant être utilisés. According to various embodiments of the invention, the two coding wheels are arranged either side by side, or superimposed and coaxial, or superimposed and non-coaxial, different types of tracks and sensors can be used.
D'autres caractéristiques et avantages de l'invention apparaîtront au cours de la description qui va suivre, faite en référence aux dessins annexés qui en illustrent plusieurs modes de réalisation à titre d'exemples non limitatifs. Other characteristics and advantages of the invention will appear during the description which follows, given with reference to the appended drawings which illustrate several embodiments thereof by way of nonlimiting examples.
La figure 1 est une vue en plan simplifiée d'une première forme de réalisation du dispositif de codage selon l'invention. Figure 1 is a simplified plan view of a first embodiment of the coding device according to the invention.
La figure 2 est une vue en élévation latérale simplifiée d'une seconde forme de réalisation du dispositif de codage selon l'invention. Figure 2 is a simplified side elevation view of a second embodiment of the coding device according to the invention.
La figure 3 est une vue de dessus partielle du dispositif de codage de la Fig.2. Figure 3 is a partial top view of the coding device of Fig.2.
La figure 4 est une vue en élévation partielle d'une roue dentée équipée d'un système optique de transmission d'un faisceau lumineux d'un émetteur à un récepteur, dont peuvent être pourvues les roues codeuses du dispositif selon l'invention. Figure 4 is a partial elevational view of a toothed wheel equipped with an optical system for transmitting a light beam from a transmitter to a receiver, which may be provided with the encoder wheels of the device according to the invention.
La figure 5 est une vue en élévation simplifiée d'un troisième mode de réalisation du dispositif de codage selon l'invention. Figure 5 is a simplified elevational view of a third embodiment of the coding device according to the invention.
La figure 6 est une vue de dessus du dispositif de codage de la Fig.5. Figure 6 is a top view of the coding device of Fig.5.
Le dispositif de codage représenté à la Fig.1 comprend deux roues codeuses (1,2), disposées côte-å-côte avec un écartement approprié entre elles et avec leurs axes XX et YY parallèles, ainsi qu'une chaîne cinématique de liaison et d'entraînement de ces deux roues. Cette chaîne est constituée, dans l'exemple décrit, par deux roues superposées, dont seule la roue supérieure 3 est visible. Les dentures de ces deux roues sont en prise avec celles des roues codeuses 1 et 2. The coding device shown in FIG. 1 comprises two coding wheels (1,2), arranged side-by-side with an appropriate spacing between them and with their axes XX and YY parallel, as well as a kinematic chain of connection and of these two wheels. This chain consists, in the example described, by two superimposed wheels, of which only the upper wheel 3 is visible. The teeth of these two wheels are in mesh with those of the coding wheels 1 and 2.
Ces dernières ont un nombre de dents différent, la précision du codeur étant d'autant plus grande que le rapport du nombre de dents de la roue (2) au nombre de dents de la roue (1) est faible. Par exemple si la roue (1) est munie de 30 dents (la), la roue (2) peut avoir 29 ou 31 dents (2a). De leur côté, les roues d'entraînement (3) comportent un nombre de dents identique, déterminé pour obtenir la dynamique souhaitée sur les roues motrices 3 : ainsi pour des nombres de dents respectifs des roues (1) et (2) de 30 et 31 dents, les dentures des roues (3) comporteront 36 dents chacune pour obtenir une rotation des roues 3 sur 25 tours, tandis que les roues 1, 2 effectueront 30 et 31 tours respectivement. The latter have a different number of teeth, the accuracy of the encoder being all the greater the lower the ratio of the number of teeth of the wheel (2) to the number of teeth of the wheel (1). For example if the wheel (1) is provided with 30 teeth (la), the wheel (2) can have 29 or 31 teeth (2a). For their part, the drive wheels (3) have an identical number of teeth, determined to obtain the desired dynamics on the drive wheels 3: thus for respective numbers of teeth of the wheels (1) and (2) of 30 and 31 teeth, the teeth of the wheels (3) will have 36 teeth each to obtain a rotation of the wheels 3 over 25 turns, while the wheels 1, 2 will perform 30 and 31 turns respectively.
Les roues (3) étant entraînées en rotation autour de leur axe ZZ par des moyens connus et non représentés, et les roues (1) et (2) étant montées en rotation sur des support non représentés, lorsque la première roue effectue
N tours, la seconde roue (2) effectue N+1 tours (ou N-l tours si la roue (2) comporte une dent de plus que la roue (1). A chaque roue (1,2) est associé un capteur (4,5) respectif de la position angulaire Pt, P2 de ladite roue (1,2), par comptage d'impulsions à partir d'une piste (6,7) agencée sur la face de la roue située en regard du capteur. The wheels (3) being driven in rotation about their axis ZZ by known means and not shown, and the wheels (1) and (2) being mounted in rotation on supports not shown, when the first wheel performs
N turns, the second wheel (2) performs N + 1 turns (or Nl turns if the wheel (2) has one more tooth than the wheel (1). Each sensor (1,2) is associated with a sensor (4 , 5) respective to the angular position Pt, P2 of said wheel (1,2), by counting pulses from a track (6,7) arranged on the face of the wheel located opposite the sensor.
Le codeur comporte également des moyens de calcul de la position absolue Pabs(1) de la roue (1) dans la course totale de la pièce commandée (non représentée), à partir de la mesure du glissement (P2 - P1) de la roue (2), selon la relation
P*s (1) = K [P2 - P1] + P1 où P1 et P2 sont les positions des roues (1,2) dans leur tour et K le coefficient de glissement relatif dépendant de la différence entre le nombre de dents des dentures des roues (1,2).The encoder also includes means for calculating the absolute position Pabs (1) of the wheel (1) in the total stroke of the controlled part (not shown), from the measurement of the slip (P2 - P1) of the wheel (2), depending on the relationship
P * s (1) = K [P2 - P1] + P1 where P1 and P2 are the positions of the wheels (1,2) in their turn and K is the relative slip coefficient depending on the difference between the number of teeth of the teeth wheels (1,2).
Les capteurs (4,5), associés à des émetteurs de faisceaux lumineux non représentés sur la Fig.1, peuvent être constitués par exemple par des systèmes optiques tel que celui partiellement représenté à la Fig.4. Sur celleci on voit une roue (1,2), sur l'une des faces de laquelle est collé ou fixé par tout moyen approprié une succession alternée de lentilles convergentes (C) et divergentes (D). The sensors (4,5), associated with emitters of light beams not shown in Fig.1, can be constituted for example by optical systems such as that partially shown in Fig.4. On this one we see a wheel (1,2), on one of the faces of which is glued or fixed by any suitable means an alternating succession of converging (C) and diverging (D) lenses.
Ces lentilles forment une piste annulaire telle que (6,7) qui défile entre l'émetteur et le capteur durant la rotation des roues (1,2). On a représenté à la Fig.4 les faisceaux lumineux (F1, F2) traversant respectivement une lentille convergente (C) et une lentille divergente (D), et reçus par les capteurs correspondants, qui les transforment en signaux convenablement traités par le circuit d'enregistrement (connu en soi).These lenses form an annular track such as (6,7) which passes between the transmitter and the sensor during the rotation of the wheels (1,2). FIG. 4 shows the light beams (F1, F2) passing through a converging lens (C) and a diverging lens (D), respectively, and received by the corresponding sensors, which transform them into signals suitably processed by the circuit d 'recording (known per se).
La précision du capteur représenté à la Fig.1 est celle de la précision de mesure de la position par la roue (1). A titre d'exemple numérique indicatif, si les roues codeuses (1,2) ont respectivement 30 et 31 dents et la roue de commande (3) 36 dents, les roues (1,2) effectuent respectivement 30 et 31 tours quand la roue (3) effectue 25 tours. Le nombre de positions possibles de l'accessoire commandé, dans sa course totale, est alors de 30 x 31 = 930 positions. On comprend donc que ce codeur permet l'obtention d'une large étendue de mesure et la détermination de la position de l'accessoire commandé d'une manière très précise, à partir de deux roues codées ayant chacune une faible étendue de mesure, et en conservant la précision de chacune de ces roues. The accuracy of the sensor shown in Fig.1 is that of the measurement accuracy of the position by the wheel (1). As an indicative numerical example, if the coding wheels (1,2) have 30 and 31 teeth respectively and the control wheel (3) 36 teeth, the wheels (1,2) perform respectively 30 and 31 turns when the wheel (3) performs 25 turns. The number of possible positions of the ordered accessory, in its total stroke, is then 30 x 31 = 930 positions. It is therefore understood that this encoder makes it possible to obtain a wide measuring range and to determine the position of the accessory controlled in a very precise manner, from two coded wheels each having a small measuring range, and maintaining the precision of each of these wheels.
Dans la seconde forme de réalisation de l'invention, représentée aux Fig.2 et 3, les deux roues codeuses dentées (8,9) sont superposées coaxialement, l'une ayant n dents (8a) tandis que l'autre (9) possède (nsx) dents (9a). Les pistes circulaires (11, 12) équipant les dents (8a,9a) sont agencées sur les faces en regard des deux roues, décalées radialement et réalisées, ainsi que les roues, en une matière transparente appropriée. In the second embodiment of the invention, shown in FIGS. 2 and 3, the two toothed coding wheels (8,9) are superposed coaxially, one having n teeth (8a) while the other (9) has (nsx) teeth (9a). The circular tracks (11, 12) equipping the teeth (8a, 9a) are arranged on the opposite faces of the two wheels, offset radially and produced, as well as the wheels, in an appropriate transparent material.
Ces pistes (11,12) peuvent avantageusement être constituées chacune d'une succession alternée de lentilles convergentes (C) et divergentes (D). De part et d'autre de chaque piste (11,12) sont placés un émetteur respectif (13,14) d'un faisceau lumineux (F) et un capteur (15,16). These tracks (11,12) can advantageously consist each of an alternating succession of converging (C) and divergent (D) lenses. On each side of each track (11,12) are placed a respective emitter (13,14) of a light beam (F) and a sensor (15,16).
Les émetteurs (13,14) peuvent émettre des faisceaux infrarouges, et ils sont reliés, ainsi que les capteurs associés (15,16), à un circuit (17) de comptage des impulsions correspondant au défilement des lentilles (C) (D) devant le capteur (15,16). La chaîne cinématique de liaison entre les roues (8,9) comporte une paire de roues (18,19) coaxiales ayant un nombre de dents approprié, solidaire d'un arbre commun (21) pouvant être entraîné en rotation par des moyens adéquats, par exemple un moteur (22). Les roues (18, 19) sont respectivement en prise avec les dents (8a, 9a) des roues codeuses (8,9).The transmitters (13,14) can emit infrared beams, and they are connected, as well as the associated sensors (15,16), to a circuit (17) for counting the pulses corresponding to the movement of the lenses (C) (D) in front of the sensor (15,16). The kinematic linkage chain between the wheels (8, 9) comprises a pair of coaxial wheels (18, 19) having an appropriate number of teeth, secured to a common shaft (21) which can be driven in rotation by suitable means, for example a motor (22). The wheels (18, 19) are respectively engaged with the teeth (8a, 9a) of the coding wheels (8, 9).
Par rapport à la réalisation de la Fig.1, celle des Fig.2 et 3 présente l'avantage d'être plus compacte donc moins encombrante. Compared to the embodiment of Fig.1, that of Fig.2 and 3 has the advantage of being more compact and therefore less bulky.
I1 convient de noter que les deux pistes (11,12) doivent obligatoirement être décalées radialement l'une de l'autre, afin que chaque faisceau infra-rouge (F) ne traverse que la piste fixée à l'une des roues (8,9). It should be noted that the two tracks (11,12) must be offset radially from each other, so that each infrared beam (F) crosses only the track fixed to one of the wheels (8 , 9).
Dans la troisième forme de réalisation du codeur, représentée aux Fig.5 et 6, les deux roues (23,24) sont superposées et décalées, donc ne se recouvrent que partiellement, l'une possédant n dents et l'autre n+ x dents. In the third embodiment of the encoder, shown in Figs. 5 and 6, the two wheels (23,24) are superimposed and offset, therefore only partially overlapping, one having n teeth and the other n + x teeth .
Les pistes circulaires (25,26) équipant les roues (24,23) peuvent être de différents types, par exemple des fentes radiales connues en soi, placées entre un émetteur infrarouge respectif (28,27) et un capteur correspondant (31,29). Ces derniers sont reliés à un circuit (32) de calcul et de comptage des impulsions correspondant au défilement des pistes (25,26) devant les capteurs.The circular tracks (25,26) equipping the wheels (24,23) can be of different types, for example radial slots known per se, placed between a respective infrared emitter (28,27) and a corresponding sensor (31,29 ). The latter are connected to a circuit (32) for calculating and counting the pulses corresponding to the movement of the tracks (25, 26) in front of the sensors.
Les fentes formant les pistes (25, 26) peuvent être remplacées par des systèmes à lentilles C et D comme décrit ci-dessus. The slots forming the tracks (25, 26) can be replaced by lens systems C and D as described above.
La chaîne cinématique de liaison et d'entraînement des roues (23,24) comprend deux roues dentées (33a, 33b) liées à un arbre commun 30, en prise respectivement avec les deux roues (23) et (24) et donc d'épaisseur suffisante à cet effet. Les roues (33a, 33b) sont mises en rotation par des moyens connus en soi et non représentés. The kinematic chain for connecting and driving the wheels (23, 24) comprises two toothed wheels (33a, 33b) linked to a common shaft 30, engaged respectively with the two wheels (23) and (24) and therefore sufficient thickness for this purpose. The wheels (33a, 33b) are rotated by means known per se and not shown.
D'une manière générale, pour chacune des trois dispositions possibles des roues codeuses, les capteurs et les pistes associées peuvent être réalisés de différentes manières : soit comme déjà décrit ci-dessus, soit des frotteurs sur des pistes gravées, soit des capteurs à effet Hall, soit encore par des dispositifs infrarouges par réflexion, transmission sur sérigraphie, ou encore par des potentiomètres. In general, for each of the three possible arrangements of the encoder wheels, the sensors and the associated tracks can be produced in different ways: either as already described above, or wipers on engraved tracks, or effect sensors Hall, either by infrared devices by reflection, transmission on screen printing, or by potentiometers.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9212603A FR2697081B1 (en) | 1992-10-21 | 1992-10-21 | Wide range encoder for determining the position of a workpiece in a predetermined amplitude stroke, such as a vehicle accessory. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9212603A FR2697081B1 (en) | 1992-10-21 | 1992-10-21 | Wide range encoder for determining the position of a workpiece in a predetermined amplitude stroke, such as a vehicle accessory. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2697081A1 true FR2697081A1 (en) | 1994-04-22 |
| FR2697081B1 FR2697081B1 (en) | 1995-01-06 |
Family
ID=9434739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9212603A Expired - Fee Related FR2697081B1 (en) | 1992-10-21 | 1992-10-21 | Wide range encoder for determining the position of a workpiece in a predetermined amplitude stroke, such as a vehicle accessory. |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2697081B1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996027116A1 (en) * | 1995-02-28 | 1996-09-06 | Robert Bosch Gmbh | Angle measuring process and device for rotary bodies |
| DE19821467A1 (en) * | 1998-05-13 | 1999-11-18 | Thomas Klug | System with two and more dimensional differential drive for high resolving measurement of number of revolutions which evaluates angle position setting of 3 gears to each other |
| WO2000034746A1 (en) * | 1998-12-04 | 2000-06-15 | Robert Bosch Gmbh | Device and method for detecting the relative position of a rotatable body |
| US6552533B2 (en) | 1999-12-22 | 2003-04-22 | Ruf Electronics Gmbh | Position sensor for determining the position of a moving object |
| EP1457762A1 (en) * | 2003-03-13 | 2004-09-15 | Stegmann GmbH & Co. KG | Device for measuring the position, the displacement or the rotational angle of an object |
| EP1477389A2 (en) | 2003-05-14 | 2004-11-17 | Alps Electric Co., Ltd. | Apparatus and method for detecting rotational angle |
| DE102007020900A1 (en) | 2007-04-25 | 2008-11-06 | Valeo Schalter Und Sensoren Gmbh | Method for determination of absolute angle of rotation of main rotor, particularly steering wheel shaft, involves detecting angle of rotation of auxiliary wheels by sensor |
| US9310195B2 (en) | 2010-08-24 | 2016-04-12 | Rotork Controls Limited | Apparatus adapted to provide an indication of an angular position of an input member over multiple turns |
| DE102017108863A1 (en) | 2017-04-26 | 2018-10-31 | Valeo Schalter Und Sensoren Gmbh | Determining a rotation angle of a steering shaft by means of three gears |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0386334A2 (en) * | 1989-01-07 | 1990-09-12 | Heidelberger Druckmaschinen Aktiengesellschaft | Position determining device |
| US5098190A (en) * | 1989-08-07 | 1992-03-24 | Optra, Inc. | Meterology using interferometric measurement technology for measuring scale displacement with three output signals |
-
1992
- 1992-10-21 FR FR9212603A patent/FR2697081B1/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0386334A2 (en) * | 1989-01-07 | 1990-09-12 | Heidelberger Druckmaschinen Aktiengesellschaft | Position determining device |
| US5098190A (en) * | 1989-08-07 | 1992-03-24 | Optra, Inc. | Meterology using interferometric measurement technology for measuring scale displacement with three output signals |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996027116A1 (en) * | 1995-02-28 | 1996-09-06 | Robert Bosch Gmbh | Angle measuring process and device for rotary bodies |
| DE19821467A1 (en) * | 1998-05-13 | 1999-11-18 | Thomas Klug | System with two and more dimensional differential drive for high resolving measurement of number of revolutions which evaluates angle position setting of 3 gears to each other |
| WO2000034746A1 (en) * | 1998-12-04 | 2000-06-15 | Robert Bosch Gmbh | Device and method for detecting the relative position of a rotatable body |
| US6507188B1 (en) * | 1998-12-04 | 2003-01-14 | Robert Bosch Gmbh | Device and method for detecting the relative position of a rotatable body |
| AU763795B2 (en) * | 1998-12-04 | 2003-07-31 | Robert Bosch Gmbh | Device and method for detecting the relative position of a rotatable body |
| US6552533B2 (en) | 1999-12-22 | 2003-04-22 | Ruf Electronics Gmbh | Position sensor for determining the position of a moving object |
| US7406772B2 (en) | 2003-03-13 | 2008-08-05 | Stegmann Gmbh & Co. Kg | Device for measuring the position, the path or the rotational angle of an object |
| EP1457762A1 (en) * | 2003-03-13 | 2004-09-15 | Stegmann GmbH & Co. KG | Device for measuring the position, the displacement or the rotational angle of an object |
| EP1477389A2 (en) | 2003-05-14 | 2004-11-17 | Alps Electric Co., Ltd. | Apparatus and method for detecting rotational angle |
| EP1477389A3 (en) * | 2003-05-14 | 2009-05-06 | Alps Electric Co., Ltd. | Apparatus and method for detecting rotational angle |
| DE102007020900A1 (en) | 2007-04-25 | 2008-11-06 | Valeo Schalter Und Sensoren Gmbh | Method for determination of absolute angle of rotation of main rotor, particularly steering wheel shaft, involves detecting angle of rotation of auxiliary wheels by sensor |
| US9310195B2 (en) | 2010-08-24 | 2016-04-12 | Rotork Controls Limited | Apparatus adapted to provide an indication of an angular position of an input member over multiple turns |
| DE102017108863A1 (en) | 2017-04-26 | 2018-10-31 | Valeo Schalter Und Sensoren Gmbh | Determining a rotation angle of a steering shaft by means of three gears |
| WO2018197372A1 (en) | 2017-04-26 | 2018-11-01 | Valeo Schalter Und Sensoren Gmbh | Determining a rotational angle of a steering shaft by means of three gear wheels |
| CN110678715A (en) * | 2017-04-26 | 2020-01-10 | 法雷奥开关和传感器有限责任公司 | Determination of the angle of rotation of a steering shaft by means of three gears |
| US11529992B2 (en) | 2017-04-26 | 2022-12-20 | Valeo Schalter Und Sensoren Gmbh | Ascertaining a rotational angle of a steering shaft by means of three toothed gears |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2697081B1 (en) | 1995-01-06 |
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| ST | Notification of lapse |