DE2035169A1 - Device for reading and evaluating a code carrier - Google Patents
Device for reading and evaluating a code carrierInfo
- Publication number
- DE2035169A1 DE2035169A1 DE19702035169 DE2035169A DE2035169A1 DE 2035169 A1 DE2035169 A1 DE 2035169A1 DE 19702035169 DE19702035169 DE 19702035169 DE 2035169 A DE2035169 A DE 2035169A DE 2035169 A1 DE2035169 A1 DE 2035169A1
- Authority
- DE
- Germany
- Prior art keywords
- code
- actual value
- counter
- code carrier
- reading
- 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.)
- Pending
Links
- 238000005303 weighing Methods 0.000 description 2
- 239000011521 glass Substances 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
- G01D5/12—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
- G01D5/249—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 pulse code
- G01D5/2497—Absolute 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
- G01D5/12—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
- G01D5/25—Selecting one or more conductors or channels from a plurality of conductors or channels, e.g. by closing contacts
- G01D5/252—Selecting one or more conductors or channels from a plurality of conductors or channels, e.g. by closing contacts a combination of conductors or channels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/18—Indicating devices, e.g. for remote indication; Recording devices; Scales, e.g. graduated
- G01G23/36—Indicating the weight by electrical means, e.g. using photoelectric cells
- G01G23/361—Indicating the weight by electrical means, e.g. using photoelectric cells using photoelectric cells
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/18—Indicating devices, e.g. for remote indication; Recording devices; Scales, e.g. graduated
- G01G23/36—Indicating the weight by electrical means, e.g. using photoelectric cells
- G01G23/37—Indicating the weight by electrical means, e.g. using photoelectric cells involving digital counting
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/18—Indicating devices, e.g. for remote indication; Recording devices; Scales, e.g. graduated
- G01G23/38—Recording and/or coding devices specially adapted for weighing apparatus
- G01G23/42—Recording and/or coding devices specially adapted for weighing apparatus electrically operated
- G01G23/44—Coding devices therefor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Recording Measured Values (AREA)
- Time-Division Multiplex Systems (AREA)
- Optical Transform (AREA)
- Optical Recording Or Reproduction (AREA)
Description
Werkzeugmaschinenfabrik Oerlikon-Bührle AGMachine tool factory Oerlikon-Bührle AG
8050 Zürich8050 Zurich
Vorrichtung zum Ablesen und Auswerten eines CodeträgersDevice for reading and evaluating a code carrier
Die Erfindung betrifft eine Vorrichtung zum Ablesen und Auswerten eines Codeträgers, welcher Codeträger als Istwertgeber insbesondere für eine Dosieranlage dient und mit mehreren Codespuren versehen ist, wobei mindestens eine Codespur eine äquidistante Teilung aufweist. ,The invention relates to a device for reading and evaluating a code carrier, which code carrier serves as an actual value transmitter in particular for a metering system and is provided with several code tracks, with at least one code track having an equidistant division having. ,
Bei einer bekannten Vorrichtung dieser Art ist der Codeträger als Scheibe ausgebildet. Die Scheibe trägt einen digital absoluten Code und ist mit der Achse einer Kreiszeigerwaage gekoppelt. Der Code wird von einer Photozellenanordnung abgetastet, dife abgelesene Information einem Relalsentschlüssler zugeführt und die entschlüsselten Zahlenwerte gelangen in einer Ziffernanzeige zur Anzeige. Ein solches, digital absolut arbeitendes System 1st zwar gut zur Anzeige des jeweiligen Gewichtswertes geeignet - eignetIn a known device of this type, the code carrier is designed as a disk. The disk has a digital absolute code and is coupled to the axis of a circular pointer scale. The code is scanned by a photocell arrangement, the read information is fed to a relals decoder and the decrypted numerical values are displayed on a numeric display. Such a digital absolute working system is well suited for displaying the respective weight value - suitable
109808/1343109808/1343
sich Jedoch weniger gut fur den Vergleich des Istwertes mit einem vorgegebenen Sollwert. Es besteht beim Abwiegen mehrerer Komponenten die Gefahr, dass die Fehler vorausgegangener. Komponenten das Wiegeergebnis einer nachfolgenden Komponente verfälschen. Solche Fehler sind nur durch ein verhältnismässig aufwendiges digitales Rechenwerk zu vermeiden.However, it is less good at comparing the actual value with a specified setpoint. When weighing several components, there is a risk that the previous errors. Components that Falsify the weighing result of a subsequent component. Such Errors are only due to a relatively complex digital Avoid arithmetic unit.
Die vorliegende Erfindung bezweckt die Verbesserung der bekannten Vorrichtung dergestalt, dass sie auch in einfacher Weise einen Soll-Istwert-Vergleich ermöglicht.The present invention aims to improve the known device in such a way that it can also be used in a simple manner Setpoint / actual value comparison enabled.
Erfindungsgemciss gelingt dies durch die Kombination eines digital abeolut arbeitenden Systems zur Dekodierung„und Anzeige des Istwertes mit einem inkremental arbeitenden System zum Vergleich des aus der äquidistant geteilten Spur des Codeträgere ausgelesenen Istwertes mit einem Sollwert.According to the invention, this is achieved by combining a digital abeolut working system for decoding “and display of the actual value with an incrementally operating system for comparing the read out from the equidistantly divided track of the code carrier Actual value with a setpoint.
Anhand der einzigen Figur der anliegenden Zeichnung, welche ein Ausführungsbeispiel einer erfindungsgemässen Vorrichtung darstellt, wird die Erfindung im folgenden näher beschrieben.On the basis of the only figure in the attached drawing, which is a Represents an embodiment of a device according to the invention, the invention is described in more detail below.
Mit einer Achse A, beispielsweise einer Kreiszeigerwaage, ist eine Codescheibe CS gekuppelt. Die Codescheibe CS besteht aus Glas und weist η Codespuren S ....Sn auf, die gemass einem Binärcode In regelmässige Hell-Dunkel-Rasterungen aufgeteilt sind. Auf einer Seite der Codescheibe CS ist eine Lichtquelle h angeordnet. Auf der anderen Seite der Codescheibe CS sind entsprechend den η Codespuren δ 0····δ η n Photozellen PQ....Pn angeordnet. Die η Photozellen ρ ο····ρ η 3lnd nebeneinander auf einem Radius der Codescheibe CSA code disk CS is coupled to an axis A, for example a circular pointer balance. The code disk CS consists of glass and has η code tracks S .... S n , which are divided into regular light-dark grids according to a binary code. A light source h is arranged on one side of the code disk CS. On the other side of the code disk CS, photocells P Q .... P n are arranged in accordance with the η code tracks δ 0 ···· δ η n. The η photocells ρ ο ···· ρ η 3lnd next to each other on a radius of the code disk CS
109808/1343109808/1343
angeordnet, sodass jede Photozelle P0....Pn nur Signale der zugeordneten Codespur So·...Sn empfängt. Die von den Photozellen Ρο···Ρη empfangenen signale erfahren in nachgeschalteten Verstärkern V0 · · .Vn eine Verstärkung. Alle Signale sind sodann auf die parallelen EincUrioC eines Binär-De^lnial-Wandlers CW erführt, v/elcher an seinem Ausj;ang eine rr.ehrst eilige Dezimalzahl ausgibt, die in einer elektronischen Ziffernanzeige AZ angezeigt wird und auf einem Drucker SM ausgedruckt werden kann.arranged so that each photocell P 0 .... P n only receives signals of the assigned code track So · ... S n . The signals received by the photocells Ρο ··· Ρη are amplified in downstream amplifiers V 0 · · .V n . All signals are then fed to the parallel input of a binary-de-lnial converter CW, which outputs a very precise decimal number at its output, which is displayed on an electronic numeric display AZ and printed out on a printer SM can.
Die von der feinsten Spur So bei Bewegung und Beleuchtung der Codescheibe Cl* erzeugten und von der Photozelle P0 registrierten Inipulse werden zusätzlich auf den Rückstelleingang eines Vor- RUckwärtszählers ~ L;e&eben. Dieser Zähler Z '..'ird zuvor auf einen durch eine Lochkarte IJi vorgegebenen Gewichts-Sollviert elncestellt. Eei:n Abwiegen der entsprechenden Komponente wird durch das Gewicht die Zeigerachse A der v.'aa^e und die Codescheibe CS gedreht. Die hierbei von der Photo- ^eIIe P0 registrierten Impulse stellen den Zähler Z sclirittweise ■ /.urück. r?ei:n Zählstand 0 des Zälilers Z entspricht der Istwert genau den Sollwert, üit der- hierbei ar:r Ausgang E des Zählers Z erscheinenden Abgleichsienal wird der Drucker SM beaufschlagt, sodass dieser den jeweiligen Gewichts-Istwert ausdruckt. Aus dem Zählstand des Zählers Z, welcher ar. Ausgang E desselben laufend ausgegeben wird, wird die Entscheidung abgeleitet, ob von der abzuwiegenden Komponente noch weiter auf die Waage gefördert werden soll, wann von Grob- auf Peinförderunfj unigeschaltet werden soll und*'wann die Förderung ganz abgeschaltet werden soll.The impulses generated by the finest track So when the code disk Cl * is moving and illuminated and registered by the photocell P 0 are also sent to the reset input of an up / down counter ~ L; e & even. This counter Z '..' is previously set to a weight target fourth predetermined by a punch card IJi. When the corresponding component is weighed, the pointer axis A of the v.'aa ^ e and the code disk CS are rotated by the weight. The pulses registered by the Photo- ^ eIIe P 0 reset the counter Z step by step. r? ei: n count 0 of the counter Z, the actual value corresponds exactly to the setpoint value, with the adjustment signal appearing at output E of the counter Z, the printer SM is acted upon so that it prints out the respective actual weight value. From the count of the counter Z, which ar. Output E of the same is continuously output, the decision is derived whether the component to be weighed should continue to be conveyed onto the scales, when to switch from coarse to fine conveying and when the conveying is to be completely switched off.
109 808/ 1?'?109 808/1? '?
Die erf indungsgernässe Vorrichtung ist nicht auf eine Skala in Form einer Codescheibe beschrankt. Ebensogut Kann ein Codelineal zur Istwerterfassung translatorischer Bewegungen eine Anwendung finden. Bezüglich der Codierung· ist lediglich die Förderung zu stellen,, dass eine Spur eine äquidistante Teilung aufweist. Zweckmässigerweise wird dies die feinste Spur sein* da diese die Aufläsung der Skala bestimmt. Da es Codes: gibt, die diese Eigenschaft haben,, kann wie im beschriebenen Ausführungsbeispiel - eine codierte Skala so- * wohl digital absolut als auch inkremental ausgewertet werden. Selbstverständlich kann, die Skala neben einem Code auch noch zusätzlich eine separate Strichteilung aufweisen, wobei Code und Strichteilung dann jeweils für sich ausgewertet werden.The device according to the invention is not on a scale in shape limited by a code disk. A code ruler can just as well Actual value acquisition of translatory movements find an application. Regarding the coding · only the funding is to be provided, that a track has an equidistant pitch. Appropriately this will be the finest trace * since this is the resolution of the Scale determined. Since there are codes: which have this property, how can in the described embodiment - a coded scale so- * can be evaluated digitally in absolute as well as incremental fashion. Of course can, the scale in addition to a code also in addition have a separate line division, with code and line division are then evaluated individually.
Die Vereinigung zweier voneinander unabhängiger Systeme, wie sie die inkrementale und die digital absolute Messwerterfassung darstellen, bringt wesentliche Vorteile mit sich. Einmal erfolgt der Soll-Ist-Vergleich in sehr einfacher Weise, zum anderen ist immer eine sichere " Istwertanzeige gev/ährleistet.The union of two independent systems such as the display incremental and digital absolute measured value acquisition, brings significant advantages. The target / actual comparison takes place once in a very simple way, on the other hand, a safe "actual value display is always guaranteed.
109808/1343109808/1343
BAD ORIGINALBATH ORIGINAL
Claims (3)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1186269A CH511423A (en) | 1969-08-05 | 1969-08-05 | Device for reading and evaluating a code carrier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2035169A1 true DE2035169A1 (en) | 1971-02-18 |
| DE2035169B2 DE2035169B2 (en) | 1972-02-17 |
Family
ID=4377604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19702035169 Pending DE2035169B2 (en) | 1969-08-05 | 1970-07-15 | SCALE FOR A DOSING SYSTEM WITH A DEVICE FOR READING AND EVALUATING A CODE CARRIER |
Country Status (5)
| Country | Link |
|---|---|
| CH (1) | CH511423A (en) |
| DE (1) | DE2035169B2 (en) |
| ES (1) | ES382393A1 (en) |
| FR (1) | FR2054102A5 (en) |
| NL (1) | NL7010310A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0154654A4 (en) * | 1982-10-26 | 1988-08-23 | Fanuc Ltd | Device for detecting position of rotor of motor. |
-
1969
- 1969-08-05 CH CH1186269A patent/CH511423A/en not_active IP Right Cessation
-
1970
- 1970-07-03 FR FR7024695A patent/FR2054102A5/fr not_active Expired
- 1970-07-13 NL NL7010310A patent/NL7010310A/xx unknown
- 1970-07-15 DE DE19702035169 patent/DE2035169B2/en active Pending
- 1970-08-03 ES ES382393A patent/ES382393A1/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0154654A4 (en) * | 1982-10-26 | 1988-08-23 | Fanuc Ltd | Device for detecting position of rotor of motor. |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2035169B2 (en) | 1972-02-17 |
| FR2054102A5 (en) | 1971-04-16 |
| NL7010310A (en) | 1971-02-09 |
| CH511423A (en) | 1971-08-15 |
| ES382393A1 (en) | 1972-11-16 |
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