EP0766149B1 - Einrichtung zum Bestimmen der Position von Zeigern - Google Patents
Einrichtung zum Bestimmen der Position von Zeigern Download PDFInfo
- Publication number
- EP0766149B1 EP0766149B1 EP96115517A EP96115517A EP0766149B1 EP 0766149 B1 EP0766149 B1 EP 0766149B1 EP 96115517 A EP96115517 A EP 96115517A EP 96115517 A EP96115517 A EP 96115517A EP 0766149 B1 EP0766149 B1 EP 0766149B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gearwheel
- light
- apertures
- gear
- reflector element
- 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.)
- Revoked
Links
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Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
- G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
Definitions
- the invention relates to a device for determining the position by means of a drive unit via gear wheels movable pointers with a one light transmitter, one light receiver and having at least one reflector element Reflex light barrier, with one in the beam path of the reflex light barrier protruding, at least one breakthrough, first gear wheel as well as with a light receiver downstream evaluation unit.
- Means for determining a pointer position by means of Light barriers are, for example, from the German utility model G 88 12 431.2 are known and will be communicated with appropriately controlled stepper motors as the drive unit used especially for mechanical displays in radio clocks.
- the facilities are designed such that only for a certain position of the gear wheels, i.e. For a specific step of the motor, light transmitter and light receiver the light barrier is optically coupled are. Any, but always detectable and thus reproducible gear position enables the assignment a specific time display. As a result, it is outgoing possible from this basic position, even after failure of the Power supply or when the watch is started for the first time make the pointer setting automatically and precisely.
- German utility model G 94 18 446.1 a device is described in which three gear wheels have openings, the light transmitter and light receiver being firmly attached to one end of the wheels and a reflector element on the opposite side.
- the light path is released or closed across all three gear wheels, with all three gear wheels taking up exactly one position with a clear light path.
- the optical coupling between light transmitter and light receiver takes place with the inclusion of the stationary reflector element.
- a corresponding evaluation circuit is provided to detect the optical coupling between light transmitter and light receiver.
- the object of the invention is a device for determining the position of pointers indicate the low manufacturing cost requires and enables a compact design.
- the mechanical device according to the invention Effort through a very simple design of the light barrier arrangement significantly reduced. It can also have aperture openings larger diameter can be applied to what especially with regard to the subsequent electronic Evaluation unit is advantageous. But above all, with high security each an odd number of optical Couplings achieved, which enables averaging.
- a reflex light barrier with a light transmitter and a light receiver and at least one reflector element is provided in connection with a first gearwheel that projects into the beam path of the reflex light barrier and has at least one opening.
- all of the reflector elements are arranged on a second gear wheel, with one of the openings in the first gear wheel and one of the reflector elements in the second gear wheel at certain positions of the gear wheels optically coupling the light transmitter and light receiver via the reflector element and the openings.
- the light beam passes through the corresponding openings twice.
- the further processing of signals emitted by the light receiver is carried out by an evaluation unit.
- the device according to the invention are several openings of the same shape and size in the first Gear wheel provided.
- the breakthroughs are all in one imagined, concentric to the axis of rotation of the first gear Circular line arranged in groups. Within one Group are the location angles of the breakthroughs apart from certain ones Shift angles are integer multiples of the smallest discrete step angle of the first gear.
- Shift angles are integer multiples of the smallest discrete step angle of the first gear.
- An increase in accuracy is also achieved by that both locally and functionally, i.e. within the Gear train, between the first and second gear wheel at least a protruding into the beam path of the light barrier another gear wheel arranged with at least one opening is.
- the size, shape and position of the further gear wheel and its breakthroughs are designed in such a way that only one pass of the breakthroughs of the first gear per revolution of the second gear wheel to an optical Coupling of light transmitter and light receiver leads. This is a clear determination of the starting position possible.
- the second gear only reflector element which once in Course of a rotary movement of the second gear wheel with the optical axis of the light barrier meets.
- the openings of the first gear wheel also hit in the holding phases of the gear movement one after the other exactly or with constant deviation also with the optical Axis of the light barrier together.
- the reflector element (s) is preferred in the second Gear wheel designed as a shiny metal print. Thereby become reflector elements with little effort and high accuracy realized and positioned. Beyond that this type of manufacture, especially for frequently used ones Gear wheels made of plastic can be used in a simple manner.
- the first gearwheel with Second hand and the second gear wheel with the minute hand coupled When using the device according to the invention in watches and in the case of radio clocks in particular, the first gearwheel with Second hand and the second gear wheel with the minute hand coupled.
- the second gear preferably has a reflector element and the first gear four as pinholes trained, arranged in a single group Breakthroughs. Within the group are the pinholes, apart from defined displacement angles, at an angle, preferably of 48 degrees each, next to each other on a Gear wheel center arranged concentric circular line.
- a further gear wheel protruding into the beam path has a breakthrough designed as a slit and is both locally and functionally between the first and second Gear wheel arranged. This, for example, in conjunction with a stepper motor as a drive unit in particular embodiment suitable for radio clocks offers with little A high degree of accuracy in determining the pointer positions.
- the evaluation circuit preferably forms other the mean of the number of consecutive Times at which an optical coupling takes place, and sets a gear step corresponding to the mean as the starting position of the setting of the position of the gear wheels based. This will also be proportionate low means high accuracy in position determination achieved.
- the device according to the invention is a transmission for a clockwork provided that has several gears. It deals gears, their gears and gear links with the gear teeth for better clarity were omitted in the drawing, so that only the wheel disks are visible.
- One with one Shaft 14 rigidly connected gear wheel serves as a second wheel 1, via which a shaft concentric with the shaft 14 13 rigidly coupled gear wheel provided as minute wheel 2 is driven. Between second and minute wheel 1, 2 is located both in the gear train and from the spatial Location ago provided as an intermediate gear 3 gear.
- the intermediate wheel 3 finally is placed on a shaft 15.
- a reflector element 12 is attached to the minute wheel 2, that by means of a metal print on the manufactured as plastic Minute wheel 2 is applied.
- the second wheel contains 1 four as perforated diaphragms 8a, 8b, 8c, 8d with circular Cross-sectional openings formed side by side in a group on an imaginary axis of rotation of the shaft 14 concentric circular line 10 are arranged.
- the detection of the angular position of minute wheel 2 and second wheel 1 takes place by means of an optoelectronic reflex coupler 4, its light transmitter 5 and its light receiver 6 are arranged in one plane.
- the reflex coupler 4 forms in conjunction with the reflector element 12, a reflected light barrier.
- the optical axis 7 of the reflex coupler 4 runs starting from the center of the connecting line between Light transmitter 5 and light receiver 6 perpendicular to the reflex coupler 4 and substantially parallel to the shafts 13, 14 and 15 away from the reflex coupler 4.
- An evaluation circuit 16 following the light receiver which among other things the successive average Forms coupling events, determined from this mean corresponding gear step an initial position of the Transmission.
- This starting position is then an exact, gearbox setting corresponding to a predetermined value based on.
- a value is, for example provided by a time signal receiver.
- about the evaluation device 16 can then suitably not shown in the drawing stepper motor the gear move to the desired position.
- the four perforated apertures 8a, 8b, 8c, 8d, which are along the imaginary Circular line 10 are arranged in a group with each other position angle 9a, 9b, 9c. These are apart integer from a well-defined displacement angle Multiples of the smallest discrete step angle of the seconds wheel 1.
- the arrangement of the pinhole 8a, 8b, 8c, 8d relative for the interlocking is not defined.
- the shift angle are determined by the mechanical tolerances of the individual Components and the gear assembly and by the size of the Backlash of the gear wheels determined. You choose the displacement angle is distributed as evenly as possible between 0 ° and half the step angle of the second wheel 1 in positive and negative direction.
- Half the step angle of the seconds wheel 1 is generally 3 °.
- the step angle of 6 ° results from the angle of 360 ° in one revolution as well as 60 individual ones corresponding to one second each Steps of the second wheel 1.
- n is an integer and the
- the displacement angle ⁇ is 8a for the aperture hole 0 °, for 8b exactly + 1 °, for 8c exactly -1 ° and for 8d either -2 ° or + 2 °.
- the individual displacement angles - ⁇ must always be less than 3 °.
- the intermediate gear 3 ensures that only once during one full rotation of the minute wheel 2 an optical coupling through one of the perforated diaphragms 8a, 8b, 8c, 8d.
- the length of the slit diaphragm 11 must be chosen accordingly.
- second wheel 1, intermediate wheel 3 and minute wheel 2 in the position in which the optical coupling occurs be arranged exactly to each other. Because these three wheels 1, 2, 3 are coupled via their gears, the remains Mounting position of the panel system to each other and in relation to the optical axis 7 except for the usual angular deviations received for example due to the backlash. So is ensures high reproducibility of the synchronous position, although the arrangement is not exactly as usual reflex light barrier aligned to one gear step having.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
- Length Measuring Devices By Optical Means (AREA)
Description
Die optische Kopplung zwischen Lichtsender und Lichtempfänger erfolgt dabei unter Einbeziehung des stationären Reflektorelements. Zur Erkennung der optischen Kopplung zwischen Lichtsender und Lichtempfänger ist eine entsprechende Auswerteschaltung vorgesehen.
Die entsprechenden Durchbrüche werden vom Lichtstrahl dabei zweimal durchlaufen. Die Weiterverarbeitung vom Lichtempfänger abgegebener Signale erfolgt durch eine Auswerteeinheit.
Claims (9)
- Einrichtung zum Bestimmen der Position von mittels einer Antriebseinheit über Getrieberäder (1, 2, 3) bewegbaren Zeigern mit einer einen Lichtsender (5), einen Lichtempfänger (6) und mindestens ein Reflektorelement (12) aufweisenden Reflexlichtschranke (4, 12), mit einem in den Strahlengang der Reflexlichtschranke (4, 12) ragenden, mindestens einen Durchbruch aufweisenden, ersten Getrieberad (1) sowie mit einer dem Lichtempfänger (6) nachgeschalteten Auswerteeinheit (16), wobei sämtliche Reflektorelemente (12) auf einem zweiten Getrieberad (2) angeordnet sind, wobei mittels jeweils eines Durchbruchs beim ersten Getrieberad (1) und jeweils eines Reflektorelements (12) beim zweiten Getrieberad (2) bei bestimmten Positionen der Getrieberäder (1, 2) eine optische Kopplung von Lichtsender (5) und Lichtempfänger (6) gegeben ist, dadurch gekennzeichnet, daß mehrere Durchbrüche (8a, 8b, 8c, 8d) gleicher Form und Größe beim ersten Getrieberad (1) vorgesehen sind, die auf einer zur Drehachse des ersten Getrieberads (1) konzentrischen Kreislinie gruppenweise angeordnet sind und daß innerhalb einer Gruppe die Lagewinkel (9a, 9b, 9c) der Durchbrüche (8a, 8b, 8c, 8d) abgesehen von bestimmten Verschiebewinkeln ganzzahlige Vielfache des kleinsten diskreten Schrittwinkels des ersten Getrieberads (1) sind.
- Einrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß sowohl örtlich als auch funktionell zwischen erstem und zweitem Getrieberad (1, 2) mindestens ein in den Strahlengang ragendes weiteres Getrieberad (3) mit mindestens einem Durchbruch (11) angeordnet ist. - Einrichtung nach Anspruch 2,
dadurch gekennzeichnet, daß Größe, Form und Position des weiteren Getrieberads (3) sowie dessen Durchbrüche (11) derart ausgebildet sind, daß nur ein Durchlauf der Durchbrüche (8a, 8b, 8c, 8d) des ersten Getrieberads (1) pro Umdrehung des zweiten Getrieberads (2) zu einer optischen Kopplung von Lichtsender (5) und Lichtempfänger (6) führt. - Einrichtung nach Anspruch 1 bis 3,
dadurch gekennzeichnet, daß beim zweiten Getrieberad (2) ein einziges Reflektorelement (12) vorgesehen ist, daß einmal im Verlauf einer Drehbewegung des zweiten Getrieberads (2) mit der optischen Achse der Reflexlichtschranke (12, 4) zusammentrifft. - Einrichtung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß die Durchbrüche (8a, 8b, 8c, 8d) des ersten Getrieberads (1) in den Haltephasen der Getriebebewegung nacheinander jeweils genau oder mit konstanter Abweichung mit der optischen Achse der Reflexlichtschranke (4, 12) zusammentrifft. - Einrichtung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß als Reflektorelement(e) (12) beim zweiten Getrieberad (2) ein glänzender Metallaufdruck vorgesehen ist. - Einrichtung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß das erste Getrieberad (1) mit einem Sekundenzeiger und das zweite Getrieberad (2) mit einem Minutenzeiger gekoppelt ist. - Einrichtung nach Anspruch 7,
dadurch gekennzeichnet, daß das zweite Getrieberad (2) ein Reflektorelement (12) und das erste Getrieberad (1) vier als Lochblenden ausgebildete, in einer Gruppe angeordnete Durchbrüche (8a, 8b, 8c, 8d) aufweist, daß innerhalb der Gruppe die Lochblenden (8a, 8b, 8c, 8d), abgesehen von definierten Verschiebewinkeln in einem Winkel von jeweils eines ganzzahligen Vielfaches des kleinsten diskreten Schrittwinkels, vorzugsweise 48 Grad, nebeneinander auf einer Kreislinie angeordnet sind und daß ein weiteres Getrieberad (3) einen als Schlitzblende ausgebildeten Durchbruch (11) aufweist und sowohl örtlich als auch funktionell zwischen erstem und zweitem Getrieberad (1, 2), in den Strahlengang der Reflexlichtschranke (4, 12) ragend angeordnet ist. - Einrichtung nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, daß die Auswerteschaltung (16) unter anderem den Mittelwert der Anzahl aus aufeinanderfolgenden Ereignissen mit optischer Kopplung zwischen Lichtsender (5) und Lichtempfänger (6) bildet und einen dem Mittelwert entsprechenden Getriebeschritt als Ausgangsposition der Einstellung der Getrieberäder zugrundelegt.
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29515478U | 1995-09-28 | ||
DE29515478U DE29515478U1 (de) | 1995-09-28 | 1995-09-28 | Drehwinkelerfassungseinrichtung für Zahnräder, insbesondere eines Funkuhrrädergetriebes |
DE19612103 | 1996-03-27 | ||
DE19612103 | 1996-03-27 | ||
DE19632011 | 1996-08-08 | ||
DE19632011A DE19632011A1 (de) | 1995-09-28 | 1996-08-08 | Einrichtung zum Bestimmen der Position von Zeigern |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0766149A2 EP0766149A2 (de) | 1997-04-02 |
EP0766149A3 EP0766149A3 (de) | 1999-02-24 |
EP0766149B1 true EP0766149B1 (de) | 2002-03-20 |
Family
ID=27216084
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96115517A Revoked EP0766149B1 (de) | 1995-09-28 | 1996-09-27 | Einrichtung zum Bestimmen der Position von Zeigern |
Country Status (4)
Country | Link |
---|---|
US (1) | US5734474A (de) |
EP (1) | EP0766149B1 (de) |
JP (1) | JPH09166671A (de) |
AT (1) | ATE214815T1 (de) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6181423B1 (en) * | 1998-10-06 | 2001-01-30 | Jorge Uriarte | Linear encoder providing engagement by engraving |
JP3673416B2 (ja) * | 1998-11-30 | 2005-07-20 | リズム時計工業株式会社 | 自動修正時計 |
CN1132077C (zh) | 1999-05-06 | 2003-12-24 | 阿苏拉布股份有限公司 | 包括用于指示同轴模拟显示指针之角度位置的装置的钟表 |
DE69942303D1 (de) * | 1999-05-06 | 2010-06-10 | Asulab Sa | Uhr mit Mittel zur Ermittlung der Winkelstellung der koaxialen Zeiger einer analogen Anzeige |
US20030063525A1 (en) * | 2001-09-28 | 2003-04-03 | Ken Richardson | Microprocessor controlled quartz analog clock movement |
EP1357448A1 (de) * | 2002-04-26 | 2003-10-29 | Kienzle Time (Hong Kong) Limited | Funkgesteuerte Uhr |
TW558676B (en) * | 2002-08-02 | 2003-10-21 | Chih-Hao Yiu | Device for detecting angular position |
US20040125702A1 (en) * | 2002-10-21 | 2004-07-01 | Hideki Kitajima | Rotational position detection device, hand position detection device and clock using the hand position detection device |
US6804173B2 (en) * | 2002-10-28 | 2004-10-12 | Chih Hao Yiu | Rotary members for timepiece having reflector sheets |
JP2004184404A (ja) * | 2002-11-21 | 2004-07-02 | Seiko Instruments Inc | 針位置検出装置及びこれを備えた電子時計 |
JP2004184405A (ja) * | 2002-11-21 | 2004-07-02 | Seiko Instruments Inc | 針位置検出装置及びこれを用いた電子時計 |
US7154818B2 (en) * | 2004-10-12 | 2006-12-26 | Ele Gancy Tleleancy Co., Ltd. | Radio controlled clock movement control system |
JP4715176B2 (ja) * | 2004-11-29 | 2011-07-06 | セイコーエプソン株式会社 | 電子時計 |
DE602008004039D1 (de) | 2007-09-28 | 2011-02-03 | Casio Computer Co Ltd | Zeigerpositionserkennungsgerät und Vorrichtung mit diesem Gerät |
JP4488049B2 (ja) * | 2007-09-28 | 2010-06-23 | カシオ計算機株式会社 | 針位置検出装置 |
JP4596002B2 (ja) * | 2007-12-25 | 2010-12-08 | カシオ計算機株式会社 | 針位置検出装置および針位置検出方法 |
JP4623140B2 (ja) | 2008-05-28 | 2011-02-02 | カシオ計算機株式会社 | 針位置検出装置および針位置検出制御方法 |
JP4730397B2 (ja) * | 2008-05-30 | 2011-07-20 | カシオ計算機株式会社 | 針位置検出装置 |
TW201925824A (zh) * | 2017-12-01 | 2019-07-01 | 原相科技股份有限公司 | 用於可旋轉裝置定位之光學機構 |
US11175747B2 (en) * | 2013-02-04 | 2021-11-16 | Pixart Imaging Inc. | Optical processing apparatus and operating method thereof |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4358753A (en) * | 1981-03-16 | 1982-11-09 | Rockwell International Corporation | High resolution shaft position encoder |
JPS5981520A (ja) * | 1982-10-30 | 1984-05-11 | Shimadzu Corp | 分光器スリツト機構 |
DE3429648A1 (de) * | 1984-08-11 | 1986-02-13 | Dr. Johannes Heidenhain Gmbh, 8225 Traunreut | Lagemesseinrichtung |
DE3510861C2 (de) † | 1984-11-09 | 1986-09-25 | Gebrüder Junghans GmbH, 7230 Schramberg | Anzeigestellungs-Detektionseinrichtung für eine Uhr, insbesondere eine Funkuhr |
DE3513961A1 (de) * | 1985-04-18 | 1986-10-23 | Forschungsgesellschaft für Feingeräte-, Mikro- und Uhrentechnik e.V., 7000 Stuttgart | Getriebestandserfassungseinrichtung bei einer elektronischen uhr insbesondere funkgesteuerte uhr |
DE3828810A1 (de) * | 1988-08-25 | 1990-03-01 | Kienzle Uhrenfabriken Gmbh | Vorrichtung zur anzeigestellungsdetektion fuer eine analoge elektronische uhr, insbesondere eine funkgesteuerte uhr |
DE8812431U1 (de) * | 1988-10-01 | 1990-02-01 | Kieninger & Obergfell, Fabrik für technische Laufwerke und Apparate GmbH & Co, 7742 St Georgen | Zeigerdetektion für elektrische Uhren, insbesondere für Funkuhren |
DE9315669U1 (de) * | 1993-10-14 | 1995-02-09 | Junghans Uhren Gmbh, 78713 Schramberg | Kleine Funkuhr |
DE9418446U1 (de) * | 1994-11-18 | 1995-02-16 | Hahn-Schickard-Gesellschaft für angewandte Forschung eV, 70174 Stuttgart | Optoelektronische Zeigerstandserkennung |
DE4446929C2 (de) † | 1994-12-09 | 2002-05-23 | Fritz Schaeffel | Uhr, insbesondere Funkuhr |
US5640007A (en) * | 1995-06-21 | 1997-06-17 | Limitorque Corporation | Optical encoder comprising a plurality of encoder wheels |
-
1996
- 1996-09-27 AT AT96115517T patent/ATE214815T1/de not_active IP Right Cessation
- 1996-09-27 JP JP8255793A patent/JPH09166671A/ja active Pending
- 1996-09-27 EP EP96115517A patent/EP0766149B1/de not_active Revoked
- 1996-09-30 US US08/723,514 patent/US5734474A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0766149A2 (de) | 1997-04-02 |
JPH09166671A (ja) | 1997-06-24 |
EP0766149A3 (de) | 1999-02-24 |
US5734474A (en) | 1998-03-31 |
ATE214815T1 (de) | 2002-04-15 |
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