WO1998023921A1 - Incremental encoder having absolute reference marks - Google Patents
Incremental encoder having absolute reference marks Download PDFInfo
- Publication number
- WO1998023921A1 WO1998023921A1 PCT/NL1997/000654 NL9700654W WO9823921A1 WO 1998023921 A1 WO1998023921 A1 WO 1998023921A1 NL 9700654 W NL9700654 W NL 9700654W WO 9823921 A1 WO9823921 A1 WO 9823921A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wheel
- sensor
- gear
- sensors
- crenellations
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 23
- 230000005355 Hall effect Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- G01D5/12—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 electric or magnetic means
- G01D5/244—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 electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
- G01D5/245—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 electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
- G01D5/2454—Encoders incorporating incremental and absolute signals
- G01D5/2455—Encoders incorporating incremental and absolute signals with incremental and absolute tracks on the same encoder
- G01D5/2457—Incremental encoders having reference marks
Definitions
- the invention provides a method for realizing a highly compact system for determining the position of a movable part for selectively closing or releasing an opening, in particular the panel of a sliding roof or a motor-driven window in a door of a motorcar or truck, in respect of which it is important to know the position of the roof panel in order to, for instance, cause the panel to stop at a particular location.
- Devices which comprise external sensors such as Hall-effect sensors, disposed at a magnet with one or more pairs of poles which is/are mounted around the motor shaft or on a shaft connected to the motor shaft.
- devices which comprise external sensors such as optical slotted sensors operated by crenellations, which are again mounted on or against a wheel driven, with or without a transmission, by the motor shaft .
- the motor can move the roof panel for instance via a drive cable. Via this drive cable, the wheel with the crenellations can again be driven.
- the invention enables the use of several wheels, which nevertheless do not occupy more space than the space occupied by one wheel. In particular if the building-in space is limited, this will be highly advantageous.
- a gear wheel driven by the drive cable is used, which gear wheel drives, by means of an eccentric, a second wheel having substantially the same center as the first one. As a result, this second wheel rotates far more slowly than the first wheel.
- Mounted on a ring on the first wheel are crenellations rotating through an optical slotted sensor whereby incremental position information is provided.
- a crenellation On a concentric second ring on the first wheel, a crenellation is arranged. This crenellation also rotates through a slotted sensor, which produces a reference pulse which, however, occurs several times over the entire distance. On the second gear wheel, too, a crenellation is arranged. By means of a slotted sensor, this crenellation is scanned, too. Together with the reference pulse from the sensor around the second ring of the first wheel, an unequivocal, accurate reference pulse can now be made.
- a combination of two gear wheels always takes up much more space than one gear wheel .
- the invention has the advantage of two gear wheels, i.e. a large number of distance pulses with an accurate reference pulse, and the space occupation of one gear wheel. In particular in places where there is little space for a control, this invention will be highly advantageous. Hereinafter, the invention will be further described with reference to the accompanying drawings .
- Fig. 1 shows the arrangement with the gear wheels, sensors and drive cable
- Fig. 2 shows the same arrangement, viewed from below;
- Fig. 3 shows gear wheel 1 and gear wheel 2, viewed from above ;
- Fig. 4 shows gear wheel 1 and gear wheel 2, viewed from above, in an alternative embodiment according to Fig. 1.
- a drive cable 3 as shown in Fig. 1 drives a wheel 1 via a gear ring 4.
- the wheel 1 has sensor recognition elements in the form of crenellations 5 which move through the sensors 6 and 7. These two sensors 6, 7 provide quadrature detection, i.e. they provide 90° displaced incremental pulse information. The direction of rotation of wheel 1 can thus be determined.
- a sensor recognition element in the form of a crenellation 8 of wheel 1 rotates through a slotted sensor 9 and thus provides a reference pulse. This reference pulse occurs only once per revolution of the wheel 1.
- an outer edge 22 of the first wheel 1 drives an inner edge 24 of a second wheel 2, in this case a gear wheel 2, with the first wheel 1 and the second wheel 2 being positioned eccentrically relative to each other, so that the rotation of the first wheel 1 entails a reduced rotation of the second wheel 2.
- the diameter of the outer edge 22 is slightly less than the diameter of the inner edge 24.
- An outer edge 26 of the wheel 2 runs along an inner edge 28, closed in itself, of a fixed part 21.
- the outer edge 26 of the second wheel 2 comprises a first number of teeth 30, the inner edge 28 of the fixed part 21 comprises a second number of teeth 32 which is larger than the first number of teeth.
- gear wheel 2 has 15 teeth 30 and the firm world, i.e. the fixed part 21, has 16 teeth 32 (dotted line) .
- gear wheel 1 Each revolution of the gear wheel 1 will cause the gear wheel 2, arranged eccentrically relative to the gear wheel 1, to travel one tooth and hence 1/16 revolution.
- the ratio of transformation is 16.
- Fig. 2 shows that the gear wheel 2 has only one sensor recognition element in the form of one crenellation 10. This element is sensed by a slotted sensor 11.
- an absolute reference pulse is made which, however, is inaccurate.
- gear wheel 2 rotates much more slowly than gear wheel 1.
- the signal of crenellation 8 on gear wheel 1 is sensed by the slotted sensor 9 and can now be used for making a more accurate reference pulse.
- this pulse of sensor 9 now occurs 16 times.
- a combination of the signals of sensor 9 and sensor 11 provides a reference pulse which is 16 times more accurate than that of sensor 11 alone.
- the absolute zero can now for instance be defined as being that position in which sensor 11 detects crenellation 10, while sensor 9 detects crenellation 8.
- the output signals of the sensors 6 and 7 will not only be used for determining the direction of rotation of the first wheel, but also for an accurate determination of the rotational position of the first wheel.
- crenellations 8, 9 in combination determine the absolute zero, while by counting the number of pulses of the sensors 6 and/or 7 from this absolute zero, the exact position of the first wheel can be determined.
- the output signal of the sensor 9 can than be used as an extra check.
- the axis of rotation of the first wheel is designated by reference numeral 13, while the axis of rotation of the second wheel is designated by reference numeral 14.
- the axis of rotation 13 is fixedly disposed relative to the fixed part 21.
- the diameter of the circular outer edge 22 of the first wheel is slightly less than the diameter of the inner edge 24 of the second wheel 2.
- the axis of rotation 14 of the second wheel is eccentric relative to the axis of rotation 13 of the first wheel.
- the center of the circular outer edge 22 of the first wheel substantially coincides with the axis of rotation 14. As a consequence, rotation of the second wheel will cause this inner edge 22 of the first wheel to move up and down.
- the diameter of the first wheel is considerably smaller than the inside diameter of the second wheel. If the diameter of this outer edge of the first wheel is smaller by the same size as the difference between the diameter of the outer edge of the second wheel and the diameter of the inner edge of the fixed part, the center 13 of the circular inner edge 22 will coincide with the axis of rotation 13 of the first wheel. This axis of rotation 13 is fixedly disposed relative to the fixed part 21. During rotation of the second wheel, the center 14 of the this wheel runs along a circular path.
- the second wheel may be omitted when the diameter of the first wheel is rendered much and much larger.
- the sensor 9 determines the absolute zero and by means of the sensors 6 and/or 7, by counting the number of crenellations 5 that are successively detected by these sensors, the rotational position of the first wheel relative to the absolute zero is determined.
- this implies that a complete revolution of the first wheel entails a much greater displacement of the drive cable 3 than in the case of the above-described embodiment.
- the number of crenellations 5 will increase proportionally, so as to maintain a sufficiently great accuracy.
- the slotted sensor may be designed as an optical slotted sensor. It is also possible to replace the sensor by a separate light source and a separate light detector. In addition, the sensor may be designed as a Hall-effect sensor. It is also possible to design the sensor as a magnetic sensor. Sensor recognition elements may be designed as crenellations, as described hereinabove, but also as magnets and/or other elements that can be detected by means of other types of sensors or similar sensors. Such variants are all understood to fall within the framework of the invention.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU54161/98A AU5416198A (en) | 1996-11-27 | 1997-11-27 | Incremental encoder having absolute reference marks |
US09/308,942 US6360449B1 (en) | 1996-11-27 | 1997-11-27 | Incremental encoder having absolute reference marks |
EP97948001A EP0941452A1 (en) | 1996-11-27 | 1997-11-27 | Incremental encoder having absolute reference marks |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1004624 | 1996-11-27 | ||
NL1004624A NL1004624C2 (en) | 1996-11-27 | 1996-11-27 | Compact incremental position determination with an absolute reference. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998023921A1 true WO1998023921A1 (en) | 1998-06-04 |
Family
ID=19763939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NL1997/000654 WO1998023921A1 (en) | 1996-11-27 | 1997-11-27 | Incremental encoder having absolute reference marks |
Country Status (5)
Country | Link |
---|---|
US (1) | US6360449B1 (en) |
EP (1) | EP0941452A1 (en) |
AU (1) | AU5416198A (en) |
NL (1) | NL1004624C2 (en) |
WO (1) | WO1998023921A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2780157A1 (en) * | 1998-06-18 | 1999-12-24 | Valeo Electronique | Sensor for determination of the absolute angle of rotation of a vehicle steering wheel |
CN1313695C (en) * | 2001-10-26 | 2007-05-02 | 马兰特克传动及控制技术股份有限两合公司 | Driver for blocking element |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7290476B1 (en) | 1998-10-20 | 2007-11-06 | Control Products, Inc. | Precision sensor for a hydraulic cylinder |
JP2001343207A (en) * | 2000-03-28 | 2001-12-14 | Tokai Rika Co Ltd | Rotation detection sensor |
JP2002305399A (en) * | 2001-04-05 | 2002-10-18 | Fuji Mach Mfg Co Ltd | Adjustment apparatus of rotating position |
US7100861B2 (en) * | 2002-01-23 | 2006-09-05 | Control Products, Inc. | Lead guide for cable extension type position sensors |
US7093361B2 (en) * | 2002-01-23 | 2006-08-22 | Control Products, Inc. | Method of assembling an actuator with an internal sensor |
US6895355B2 (en) * | 2002-10-01 | 2005-05-17 | The Chamberlain Group, Inc. | Method and apparatus for calibrating an incremental count of movement |
US6972403B2 (en) * | 2003-06-26 | 2005-12-06 | Xerox Corporation | Position encoder |
US7197974B2 (en) * | 2004-01-15 | 2007-04-03 | Control Products Inc. | Position sensor |
US7609055B2 (en) * | 2004-07-21 | 2009-10-27 | Control Products, Inc. | Position sensing device and method |
EP2424803A4 (en) * | 2009-04-29 | 2017-10-18 | Muller Martini Corp. | Apparatus and method for detecting sheet quantity of paper product |
CN106149671B (en) * | 2015-03-23 | 2018-09-04 | 徐工集团工程机械股份有限公司 | The control system and method and dynamic compaction machinery of dynamic compaction machinery automatic job |
CN106149672B (en) * | 2015-03-30 | 2019-01-08 | 徐工集团工程机械股份有限公司 | The control system and method and dynamic compaction machinery for preventing hammer ram from shaking |
CN113276985B (en) * | 2021-06-10 | 2022-08-23 | 济南科亚电子科技有限公司 | Driver control method for automatically zeroing steering wheel by using incremental encoder motor |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3568629A (en) * | 1968-07-24 | 1971-03-09 | Herbert B Porter | Eccentric gearing means |
JPS56151311A (en) * | 1980-04-25 | 1981-11-24 | Hitachi Ltd | Detecting device for rotary angle |
JPS5791402A (en) * | 1980-11-28 | 1982-06-07 | Aisin Seiki Co Ltd | Vehicle height detector |
JPS59159015A (en) * | 1983-03-01 | 1984-09-08 | Matsushita Electric Ind Co Ltd | Magnetic sensor |
DE3416090A1 (en) * | 1984-03-22 | 1985-09-26 | Siemens AG, 1000 Berlin und 8000 München | Incremental position measuring device |
US5119670A (en) * | 1991-01-02 | 1992-06-09 | Delco Electronics Corporation | Crankshaft angular position detecting apparatus |
EP0539602A1 (en) * | 1991-05-10 | 1993-05-05 | Fanuc Ltd. | Magnetoresistance type revolution detector |
EP0684452A2 (en) * | 1994-05-11 | 1995-11-29 | Asmo Co., Ltd. | Position detector and position control method for a moving body |
Family Cites Families (6)
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NL192755A (en) * | 1953-11-30 | |||
DE2940429C2 (en) * | 1979-10-05 | 1986-02-20 | Marabuwerke Erwin Martz Gmbh & Co, 7146 Tamm | Drawing machine head |
DE3301205C2 (en) * | 1982-02-26 | 1985-10-03 | Dr. Johannes Heidenhain Gmbh, 8225 Traunreut | Angle measuring device |
JPS62293122A (en) * | 1986-06-13 | 1987-12-19 | Fuji Electric Co Ltd | Rotational frequency and angle of rotation detector |
IT1205656B (en) * | 1987-05-20 | 1989-03-31 | Ezio Terragni | DEVICE FOR DETERMINING THE INCLINATION OF A PLAN COMPARED TO A THEORETICAL HORIZONTAL PLAN |
JP2555083Y2 (en) * | 1991-12-24 | 1997-11-19 | 株式会社ニコン | Rotation angle measuring device |
-
1996
- 1996-11-27 NL NL1004624A patent/NL1004624C2/en not_active IP Right Cessation
-
1997
- 1997-11-27 EP EP97948001A patent/EP0941452A1/en not_active Withdrawn
- 1997-11-27 WO PCT/NL1997/000654 patent/WO1998023921A1/en not_active Application Discontinuation
- 1997-11-27 AU AU54161/98A patent/AU5416198A/en not_active Withdrawn
- 1997-11-27 US US09/308,942 patent/US6360449B1/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3568629A (en) * | 1968-07-24 | 1971-03-09 | Herbert B Porter | Eccentric gearing means |
JPS56151311A (en) * | 1980-04-25 | 1981-11-24 | Hitachi Ltd | Detecting device for rotary angle |
JPS5791402A (en) * | 1980-11-28 | 1982-06-07 | Aisin Seiki Co Ltd | Vehicle height detector |
JPS59159015A (en) * | 1983-03-01 | 1984-09-08 | Matsushita Electric Ind Co Ltd | Magnetic sensor |
DE3416090A1 (en) * | 1984-03-22 | 1985-09-26 | Siemens AG, 1000 Berlin und 8000 München | Incremental position measuring device |
US5119670A (en) * | 1991-01-02 | 1992-06-09 | Delco Electronics Corporation | Crankshaft angular position detecting apparatus |
EP0539602A1 (en) * | 1991-05-10 | 1993-05-05 | Fanuc Ltd. | Magnetoresistance type revolution detector |
EP0684452A2 (en) * | 1994-05-11 | 1995-11-29 | Asmo Co., Ltd. | Position detector and position control method for a moving body |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 006, no. 030 (P - 103) 23 February 1982 (1982-02-23) * |
PATENT ABSTRACTS OF JAPAN vol. 006, no. 175 (P - 141) 9 September 1982 (1982-09-09) * |
PATENT ABSTRACTS OF JAPAN vol. 009, no. 009 (P - 327) 16 January 1985 (1985-01-16) * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2780157A1 (en) * | 1998-06-18 | 1999-12-24 | Valeo Electronique | Sensor for determination of the absolute angle of rotation of a vehicle steering wheel |
CN1313695C (en) * | 2001-10-26 | 2007-05-02 | 马兰特克传动及控制技术股份有限两合公司 | Driver for blocking element |
US7252018B2 (en) | 2001-10-26 | 2007-08-07 | Marantec Antriebs-Und Steuerungstechnik Gmbh & Co. Kg | Drive for closure elements |
Also Published As
Publication number | Publication date |
---|---|
AU5416198A (en) | 1998-06-22 |
NL1004624C2 (en) | 1998-05-28 |
EP0941452A1 (en) | 1999-09-15 |
US6360449B1 (en) | 2002-03-26 |
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