DE10233152A1 - Rotation angle sensor has an angle disk that rotates with a shaft and has a coded information track that can be read by a stationary read head, said track comprising digital coding and being formed using mechanical molding - Google Patents
Rotation angle sensor has an angle disk that rotates with a shaft and has a coded information track that can be read by a stationary read head, said track comprising digital coding and being formed using mechanical molding Download PDFInfo
- Publication number
- DE10233152A1 DE10233152A1 DE2002133152 DE10233152A DE10233152A1 DE 10233152 A1 DE10233152 A1 DE 10233152A1 DE 2002133152 DE2002133152 DE 2002133152 DE 10233152 A DE10233152 A DE 10233152A DE 10233152 A1 DE10233152 A1 DE 10233152A1
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- angle
- sensor according
- rotation sensor
- base support
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- 238000000465 moulding Methods 0.000 title claims abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000011156 evaluation Methods 0.000 claims abstract description 13
- 239000010410 layer Substances 0.000 claims description 22
- 239000011241 protective layer Substances 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000002657 fibrous material Substances 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 239000012815 thermoplastic material Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000011521 glass Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005234 chemical deposition Methods 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000004804 winding Methods 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
- G01D5/347—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 using displacement encoding scales
- G01D5/3473—Circular or rotary encoders
-
- 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
- G01D5/347—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 using displacement encoding scales
- G01D5/34776—Absolute encoders with analogue or digital scales
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Description
Die Erfindung betrifft einen Sensor zur Drehwinkelmessung. Derartige Sensoren werden regelmäßig in der Fabrikautomation, Instrumentierung oder Prozeßkontrolle für die Steuerungen von Stellantrieben, die automatische Ablesung mechanischer Anzeigegeräte, zur Bestimmung der Wellenposition von Maschinen sowie für Regelungen im Robotik-Bereich eingesetzt.The invention relates to a sensor for measuring the angle of rotation. Such sensors are used regularly in the Factory automation, instrumentation or process control for the controls of actuators, the automatic reading of mechanical display devices, for Determination of the shaft position of machines and for controls used in the robotics area.
Derartige Drehwinkelsensoren sind in unterschiedlichen Ausführungen, Meßbereichen, Auflösungen und Genauigkeiten, sowohl als Absolut- als auch als Inkrementalgeber bekannt.Such rotation angle sensors are in different versions, measuring ranges, resolutions and accuracy, both as an absolute and an incremental encoder known.
In Abhängigkeit vom Anwendungsbereich werden unterschiedliche Prinzipien der Drehwinkelmessung eingesetzt. Ein bekanntes analoges Verfahren ist beispielsweise die Resolver-Methode, bei der das von einem magnetischen Dipol oder einem mehrpoligen, wechselstromerregten Rotor erzeugte Magnetfeld von zwei orthogonal angeordneten Magnetfeldsensoren oder Statorwicklungen nach der Sinus-Kosinus-Methode ausgewertet wird. Andere analoge Verfahren verwenden kapazitive oder potentiometrische Prinzipien.Depending on the area of application different principles of angle measurement are used. On a known analogous method is, for example, the resolver method, where that is from a magnetic dipole or a multipole, AC excited rotor generated magnetic field of two orthogonal arranged magnetic field sensors or stator windings evaluated according to the sine-cosine method becomes. Other analog methods use capacitive or potentiometric Principles.
Nach analogen Verfahren arbeitende Drehwinkelsensoren sind regelmäßig von einfachem Aufbau und robust und damit unempfindlich gegenüber industriellen Umgebungseinflüssen wie Verschmutzungen oder Temperaturänderung. Nachteilig ist jedoch deren begrenzte Meßgenauigkeit. Soweit überhaupt eine ausreichend hohe Genauigkeit erreichbar ist, erfordert diese einen aufwendigen Abgleich und/oder manuelle Justage. Darüber hinaus ist der Meßbereich regelmäßig auf weniger als den Vollkreis eingeschränkt.Working according to analog procedures Angle of rotation sensors are regularly from simple construction and robust and therefore insensitive to industrial environmental influences such as contamination or temperature change. However, it is disadvantageous their limited measurement accuracy. So far at all a sufficiently high level of accuracy is required a complex adjustment and / or manual adjustment. Furthermore is the measuring range up regularly less than the full circle.
Bekannte digitale Sensoren weisen üblicherweise eine auf einer Achse befestigte, drehbare Kodescheibe auf, auf der die Winkelinformation längs des Umfangs in radial angeordneten Bitmustern, die typischerweise dem Gray-Kode folgen, oder im Fall der Inkrementalgeber als radiales Streifenmuster kodiert ist. Die Winkelinformation wird stellungsabhängig von einem feststehenden, optischen Lesekopf, der aus einer Anordnung von mehreren Sensoren bestehen kann, gelesen, und von einer Elektronik in ein winkelproportionales, digitales oder analoges Ausgangssignal umgewandelt. Zur Erzielung einer hohen mechanischen Genauigkeit werden die Winkelscheiben aus Glas oder einem formbeständigen, transparenten Kunststoff hergestellt. Als Informationsträger wird eine auf die Oberfläche aufgebrachte, intransparente Schicht verwendet, die entweder lithographisch, durch Belichten und Entwickeln einer Photolackschicht und anschließendes chemisches Ätzen, strukturiert oder aufgedruckt wird. Die Information wird unter Verwendung gebündelten, sichtbaren oder infraroten Lichtes in Transmission gelesen.Known digital sensors usually have a rotatable code disk attached to an axis, on which the angle information along the Circumference in radially arranged bit patterns, typically the Gray code follow, or in the case of incremental encoders as radial Stripe pattern is encoded. The angle information is dependent on the position of a fixed, optical reading head that consists of an arrangement can consist of several sensors, read, and electronics into an angle-proportional, digital or analog output signal converted. To achieve high mechanical accuracy the angle plates are made of glass or a dimensionally stable, transparent Made of plastic. An opaque surface that is applied to the surface becomes the information carrier Layer used, either lithographically, by exposure and developing a photoresist layer and subsequent chemical etching, structured or printed on. The information is bundled using visible or infrared light read in transmission.
Mit digitalen Sensoren sind hohe Meßgenauigkeiten erreichbar. Nachteiligerweise ist jedoch die Herstellung der Kode- und Teilerscheiben sehr aufwendig und für eine Massenfertigung wenig geeignet. Glasscheiben haben darüber hinaus den Nachteil, daß sie empfindlich gegenüber starken Erschütterungen, und aufgrund ihrer großen Wärmekapazität auch gegen Betauung sind.With digital sensors are high accuracies reachable. The disadvantage, however, is the production of the code and dividing disks very complex and little for mass production suitable. Glass panes have over it addition, the disadvantage that they sensitive to strong shocks, and because of their great Heat capacity also against Are condensation.
Der Erfindung liegt daher die Aufgabe zugrunde, einen Drehwinkelsensor anzugeben, der die hohe Genauigkeit digitaler Drehwinkelsensoren aufweist, für eine digitale Signalverarbeitung geeignet ist und gleichzeitig eine preiswerte Massenfertigung des Informationsträgers erlaubt.The invention is therefore the object based on specifying a rotation angle sensor that the high accuracy Digital rotation angle sensors for digital signal processing is suitable and at the same time allows inexpensive mass production of the information carrier.
Erfindungsgemäß wird diese Aufgabe mit den Mitteln des Patentanspruchs 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den rückbezogenen Ansprüchen angegeben.According to the invention this task with the Means of claim 1 solved. Advantageous configurations of the invention are in the related claims specified.
Die Erfindung geht aus von einem Drehwinkelsensor, der über eine drehbare Welle mit einer externen Vorrichtung verbunden ist, deren Winkelposition bestimmt werden soll. Das Sensorgehäuse ist fest montiert. Kernstück des Drehwinkelsensors ist eine kreisrunde Winkelscheibe, die über ein zentrisch angeordnetes Mittenloch mit einer an der Welle befindlichen Aufnahme verbunden ist. Die Winkelscheibe ist in der Nähe ihres Außenrandes mit einer kreisförmigen Informationsspur versehen, deren Daten von einem über der Scheibenoberfläche angeordneten, stationären Lesekopf aufgenommen und zur Weiterverarbeitung an eine Auswerteelektronik übergeben werden. Die Elektronik erzeugt eines oder mehrere Ausgangssignale, die an externe Anzeige- oder Auswertegeräte übermittelt werden können.The invention is based on one Angle of rotation sensor that over a rotatable shaft is connected to an external device, whose angular position is to be determined. The sensor housing is fixed assembled. core The rotation angle sensor is a circular angle disk, which over a Centrally arranged center hole with one on the shaft Recording is connected. The angle washer is close to hers outer edge with a circular Provide information track, the data of one over the disk surface arranged, stationary Read head picked up and transferred to evaluation electronics for further processing become. The electronics generate one or more output signals, that can be transmitted to external display or evaluation devices.
Erfindungsgemäß besteht die zur Winkelbestimmung verwendete Winkelscheibe aus einem mittels einer Form strukturierten Trägermaterial, in das die enthaltene Winkelinformation über einen mechanischen Abformprozeß als Oberflächenprofil eingeprägt ist.According to the invention, there is the angle determination used angle disc from a structured by means of a shape Support material in which the included angle information about a mechanical molding process as a surface profile imprinted is.
Dazu werden unter Rückgriff auf für sich bekannte Verfahren zur Herstellung von Compact Disks über lithographische, chemische und galvanische Prozesse zunächst sogenannte Masterscheiben hergestellt, mit deren Hilfe schließlich die Werkzeuge zur Herstellung der Winkelscheibe gefertigt werden. Die Masterscheiben bestehen dabei üblicherweise aus Glas oder Metall. Mittels eines mechanischen Abformprozesses werden anschließend die Winkelscheiben aus Rohformen oder Gußmassen gemäß dem Muster der Masterscheibe hergestellt. Vorteilhafterweise erlaubt dieses Verfahren, hochauflösende Winkelscheiben für Drehwinkelsensoren schnell, preisgünstig und in hohen Stückzahlen herzustellen.To do this, use recourse on for known processes for the production of compact disks via lithographic, chemical and galvanic processes initially so-called master discs manufactured, with the help of which finally the tools for manufacturing the angle washer are manufactured. The master discs exist usually made of glass or metal. By means of a mechanical impression process are then the angular disks from raw forms or casting masses according to the pattern of the master disk manufactured. This method advantageously allows high-resolution angle disks for angle sensors fast, inexpensive and in large numbers manufacture.
Weitere Einzelheiten und Vorteile der Erfindung werden nachstehend anhand von Ausführungsbeispielen näher erläutert. Die dazu erforderlichen Zeichnungen zeigen:More details and advantages The invention is explained in more detail below on the basis of exemplary embodiments. The necessary drawings show:
a) einen Absolutgeber
und
b) einen Inkrementalgeber
a) an absolute encoder and
b) an incremental encoder
a) mit getrennten
Spuren und
b) mit randlos benachbarten Spuren
a) with separate tracks and
b) with borderless adjacent tracks
In
Die Winkelscheibe
Unter Verwendung gleicher Bezugszeichen für gleiche
Mittel ist in
Dazu werden über lithographische, chemische und galvanische Prozesse zunächst sogenannte Masterscheiben hergestellt, mit deren Hilfe schließlich die Werkzeuge zur Herstellung der Winkelscheibe gefertigt werden. Die Masterscheiben bestehen dabei üblicherweise aus Glas oder Metall. Mittels eines mechanischen Abformprozesses werden anschließend die Winkelscheiben aus Rohformen oder Gußmassen gemäß dem Muster der Masterscheibe hergestellt.For this purpose, lithographic, chemical and galvanic processes first so-called master discs are produced, with the help of which the Tools for the production of the angle disc are manufactured. The Master discs usually exist made of glass or metal. By means of a mechanical impression process are then the angular disks from raw forms or casting masses according to the pattern of the master disk manufactured.
In bevorzugter Ausgestaltung ist
vorgesehen, einen aus thermoplastischen Substrat bestehenden Rohling
durch Heißpressen
zu einem Grundträger
In weiterer Ausgestaltung der Erfindung
ist dem Substrat des Grundträgers
Die strukturierte Oberfläche des
Grundträgers
Die Datenspur
Die Datenspur
In bevorzugter Ausführungsform
der Erfindung ist der Drehwinkelsensor
In vorteilhafter Ausgestaltung dieser
Ausführungsform
weist die Eingangsoptik des Lesekopfes
In einer zweiten Ausführungsform
der Erfindung ist vorgesehen, dass der Grundträger
In einer dritten Ausführungsform
tastet der Lesekopf
In einer vierten Ausführungsform
der Erfindung ist der Grundträger
Unabhängig von der Ausführungsform
wird bei der Winkelmessung die Höhenmodulation
der Markierungsschicht
Beim Absolutgeber wird die absolute Winkelposition auch bei stehender Welle gelesen. Dazu wird der laterale Kontrast des Musters der konzentrisch angeordneten Zeichenspuren auswertet.With the absolute encoder, the absolute Read the angular position even when the shaft is stationary. For this the lateral Contrast of the pattern of the concentrically arranged drawing tracks evaluates.
In
In
Unabhängig davon, ob beim Absolutgeber ein Graykode oder ein anderer Schlüssel zur Aufzeichnung der Winkelinformation verwendet wird, kann diese Aufzeichnung sowohl, wie vorstehend beschrieben, als auch flankenkodiert erfolgen. Bei Flankenkodierung wird eine Binärziffer durch den räumlichen Abstand zweier aufeinanderfolgender Flanken dargestellt. Dieser erscheint bei einem abtastenden Ausleseverfahren als Zeitintervall zwischen aufeinanderfolgenden Pulsen im Ausgangssignal. Eine flankensensitive Auswertung hat in Verbindung mit einer geeigneten Filterung des Ausgangssignals den Vorteil, dass eine höhere Empfindlichkeit und dadurch ein höheres Signal-zu-Rauschverhältnis erzielt wird. Eine flankensensitive Auswertung kann mit jedem der zuvor beschriebenen Lesekopftypen kombiniert werden.Regardless of whether the absolute encoder Gray code or another key used to record the angle information, it can Recording both as described above and edge-coded respectively. In the case of edge coding, a binary digit is replaced by the spatial Distance between two successive edges shown. This appears as a time interval for a scanning reading process between successive pulses in the output signal. A flank sensitive Evaluation in connection with a suitable filtering of the Output signal the advantage of higher sensitivity and thereby a higher one Signal-to-noise ratio is achieved. An edge-sensitive evaluation can be done with any of the previously described read head types can be combined.
Dazu sind in
Bei der flankensensitiven Auswertung
wird bei jeder Flanke ein Impuls erzeugt. Aus dem Abstand der Impulse
an einem Rasterpunkt des Bitrasters
Alternativ kann vorgesehen sein,
dass aufeinanderfolgende Bit
- 11
- DrehwinkelsensorRotation angle sensor
- 22
- Winkelscheibeangle plate
- 33
- Zentralöffnungcentral opening
- 44
- Aufnahmeadmission
- 55
- Wellewave
- 66
- Lagercamp
- 77
- Sensorgehäusesensor housing
- 88th
- Datenspurdata track
- 99
- Lesekopfread head
- 1010
- Auswerteelektronikevaluation
- 1111
- Anschlußkabelcable
- 1212
- Grundträgerbase support
- 1313
- Markierungsschichtmarking layer
- 1414
- Schutzschichtprotective layer
- 1515
- Stützschichtbacking
- 16, 1816 18
- Erhebungsurvey
- 17, 1917 19
- Vertiefungdeepening
- 2020
- Bitrasterbitmap
- 2121
- Impulszugpulse
- 2222
- Bitbit
Claims (15)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002133152 DE10233152A1 (en) | 2002-07-22 | 2002-07-22 | Rotation angle sensor has an angle disk that rotates with a shaft and has a coded information track that can be read by a stationary read head, said track comprising digital coding and being formed using mechanical molding |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002133152 DE10233152A1 (en) | 2002-07-22 | 2002-07-22 | Rotation angle sensor has an angle disk that rotates with a shaft and has a coded information track that can be read by a stationary read head, said track comprising digital coding and being formed using mechanical molding |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10233152A1 true DE10233152A1 (en) | 2004-02-12 |
Family
ID=30128207
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2002133152 Ceased DE10233152A1 (en) | 2002-07-22 | 2002-07-22 | Rotation angle sensor has an angle disk that rotates with a shaft and has a coded information track that can be read by a stationary read head, said track comprising digital coding and being formed using mechanical molding |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10233152A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009008470A1 (en) * | 2009-02-15 | 2010-08-26 | Mähner, Bernward | Method for spatial measurement of e.g. vehicle or aircraft tire, involves assigning detected and registered positions to picture recording, and determining surface contour of object from captured pictures and assigned momentary positions |
EP2837916A1 (en) * | 2013-08-12 | 2015-02-18 | Siemens Aktiengesellschaft | Rotary encoder |
DE102023100826A1 (en) | 2023-01-16 | 2024-01-25 | Schaeffler Technologies AG & Co. KG | Angle of rotation measuring device, gear unit, joint module and method |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3921312A1 (en) * | 1988-06-29 | 1990-03-01 | Teldix Gmbh | High resolution absolute coder with movable coding carrier - uses scanning beam deflectable in coding carrier movement direction |
DE4025055A1 (en) * | 1990-08-07 | 1992-02-13 | Base Ten Systems Electronics G | Position read=out device for machine or turntable control - comprises recording disc with concentric tracks scanned by corresponding read heads |
DE19543483A1 (en) * | 1995-11-22 | 1997-05-28 | Hannes Weigel | Angle measurement method, e.g. for data storage device, e.g. disc drive |
JPH09257513A (en) * | 1996-03-22 | 1997-10-03 | Yaskawa Electric Corp | Rotation angle sensor |
DE69426482T2 (en) * | 1993-12-24 | 2001-07-12 | Koninkl Philips Electronics Nv | Method for producing an optical information carrier, device for carrying out the method, and optical information carrier produced by this method |
-
2002
- 2002-07-22 DE DE2002133152 patent/DE10233152A1/en not_active Ceased
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3921312A1 (en) * | 1988-06-29 | 1990-03-01 | Teldix Gmbh | High resolution absolute coder with movable coding carrier - uses scanning beam deflectable in coding carrier movement direction |
DE4025055A1 (en) * | 1990-08-07 | 1992-02-13 | Base Ten Systems Electronics G | Position read=out device for machine or turntable control - comprises recording disc with concentric tracks scanned by corresponding read heads |
DE69426482T2 (en) * | 1993-12-24 | 2001-07-12 | Koninkl Philips Electronics Nv | Method for producing an optical information carrier, device for carrying out the method, and optical information carrier produced by this method |
DE19543483A1 (en) * | 1995-11-22 | 1997-05-28 | Hannes Weigel | Angle measurement method, e.g. for data storage device, e.g. disc drive |
JPH09257513A (en) * | 1996-03-22 | 1997-10-03 | Yaskawa Electric Corp | Rotation angle sensor |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009008470A1 (en) * | 2009-02-15 | 2010-08-26 | Mähner, Bernward | Method for spatial measurement of e.g. vehicle or aircraft tire, involves assigning detected and registered positions to picture recording, and determining surface contour of object from captured pictures and assigned momentary positions |
EP2837916A1 (en) * | 2013-08-12 | 2015-02-18 | Siemens Aktiengesellschaft | Rotary encoder |
DE102023100826A1 (en) | 2023-01-16 | 2024-01-25 | Schaeffler Technologies AG & Co. KG | Angle of rotation measuring device, gear unit, joint module and method |
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