EP0939380B1 - Dispositif de lecture pour un compteur à tambours - Google Patents

Dispositif de lecture pour un compteur à tambours

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Publication number
EP0939380B1
EP0939380B1 EP19990103137 EP99103137A EP0939380B1 EP 0939380 B1 EP0939380 B1 EP 0939380B1 EP 19990103137 EP19990103137 EP 19990103137 EP 99103137 A EP99103137 A EP 99103137A EP 0939380 B1 EP0939380 B1 EP 0939380B1
Authority
EP
European Patent Office
Prior art keywords
light
roller
wheels
code
several
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.)
Expired - Lifetime
Application number
EP19990103137
Other languages
German (de)
English (en)
Other versions
EP0939380A1 (fr
Inventor
Roland Dipl.-Phys. Eth Mettler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MR Engineering AG
Original Assignee
MR Engineering AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by MR Engineering AG filed Critical MR Engineering AG
Priority to EP19990103137 priority Critical patent/EP0939380B1/fr
Publication of EP0939380A1 publication Critical patent/EP0939380A1/fr
Application granted granted Critical
Publication of EP0939380B1 publication Critical patent/EP0939380B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M1/00—Design features of general application
    • G06M1/27—Design features of general application for representing the result of count in the form of electric signals, e.g. by sensing markings on the counter drum
    • G06M1/272—Design features of general application for representing the result of count in the form of electric signals, e.g. by sensing markings on the counter drum using photoelectric means

Definitions

  • the present invention relates to a device for reading out the position of number rollers of a roller counter with shift pinions on an axis within the circumference of the number wheels, by means of which in each case the low-order number role at the end of a full turn further turns the higher-value number role by a digit or a scale part and the device for a non-contact and load-free reading of the position of number wheels radially arranged photocells and per number role multiple photocells, consisting of a light emitter with multiple receivers, or multiple light emitters and a receiver, wherein the number rollers for the purpose of determining the position by means of the light barriers at least one translucent and at least one opaque code segment extending over different angles.
  • measuring devices There are various types of measuring devices are known in which the measured size is summed up and displayed with a mechanical roller counter. Examples include volumetric instruments for gas and water or mechanical electricity meters, in which the measured volume or the measured energy with a the Device adapted mechanical reduction is transferred to a roller counter.
  • the roller counter displays the quantity measured since the last zero setting or the quantity measured since startup. To determine the consumption during a certain period, the level of the roller counter is read at the beginning and at the end of this period.
  • a common design for the roller counter consists of an axis on which the number wheels are rotatably mounted and on the circumference of the numerals 0 to 9 are applied, as well as a second, outside the number wheels lying axis with rotatable shifter pegs such that each of the lower Number role in the last tenth of a revolution by means of indexing teeth on the associated shift pinion the next higher-value role by a tenth turn continues.
  • the shift pinions are mounted on an axle within the circumference of the number wheels.
  • Such a roller counter is for example off US 4 031 386 known.
  • the cylindrical numbered rollers each have a plurality of tracks with differently coded slots, which are readable by means of opto-electronic means.
  • the cylindrical numbered rollers each have a code disk with differently coded slots, which are readable by means of opto-electronic means.
  • the cylindrical numbered rollers each have a code disc with optical code, which can be scanned by means of light source, optical fibers and light sensor.
  • the present invention is based on the object to provide a readout device for a roller counter with mounted on an axis within the number of roles Wegritzeln which results in simple means a high resolution when scanning a counting roller position and which operates independently of the drive of the roller counter and this in no Influenced manner.
  • the readout device is characterized characterized in that the display of a mechanical roller counter with internal Druckritzeln by means of radially arranged light barriers contactless and load-free, is read.
  • the number wheels have translucent and opaque code segments, by means of which information about the position of the individual number wheels are determined together with the light barriers.
  • the light barriers are arranged radially on a semicircle and consist per number roller of an internally centrally disposed optoelectronic element and a plurality of peripherally semicircular elements arranged.
  • the internal centrally arranged optoelement can be surrounded, for example, with a star-shaped multiple prism.
  • peripheral elements are designed as glass-like light guides and serve as optical signal conductors between the roller counter and - via further optoelectronic elements - the signal inputs of a microprocessor.
  • each payroll more than 10 different states are generated in the form of multi-digit digital information.
  • 30 states are generated with five digit Digigtal information.
  • the Gray code is used. In the case of the Gray code, only one bit of binary information is changed during the transition from one position to the next.
  • the FIG. 1 shows a carrier drum 11, on which, seen from right to left, a first number roller 21 and another five number wheels 25 are rotatably mounted. Of the six number rollers 21, 25, the first number roller 21, the second, fourth and sixth number wheels 25 are shown in section and the third and fifth numbers rollers 25 are shown in the outside view. On an outer transparent body 24, or 27 of the number rollers 21, 25, numerals 28 from 0 to 9 are applied to the peripheral surface.
  • the first number roller 21 has an inner non-transparent body 23 and the other number rollers 25 each have an inner non-transparent body 26. With 29 and 30 translucent, or opaque code segments are indicated. With 22, the internal teeth of the first number roller 21 is designated.
  • the carrier drum 11 is fastened with a right attachment axis 12 and with a left attachment axis 13 in a counter housing, not shown.
  • a shift pinion axis 14 On the support drum 11 is a shift pinion axis 14, on which shift pinion 31 are rotatably mounted, which turn the higher-value number roller 25 in the last tenth of the revolution of the lower-order number roller 21, 25 in each case by a tenth of a turn.
  • an inner optical element unit 41 which is held on one side by a guide pin 45 in a guide bore 15 in the carrier drum 11 and is secured on the other side to a printhead 46.
  • the inner optoelement unit 41 is shown in a next representation ( Fig.2 ) explained in more detail.
  • the inner optoelement unit 41 further comprises a printed circuit 42, on which a semiconductor optoelement 43 and a multiple optical prism 44 are applied at intervals of the number wheels 21, 25 per number roller.
  • an outer printed circuit 51 which has five successively arranged semiconductor optics elements 52, five light guides 53 to 57 and a microprocessor 58.
  • This circuit is connected to the inner opto-element unit 41 via electrical connections 59, for example wires.
  • the semiconductor optoelements 52 as light receivers and the inner optoelement units 41 can each be formed by means of a semiconductor optical element 43 as light emitter (LED). A reverse assignment of the functions of emitting light and receiving light is also possible.
  • the Fig.2 shows a view into the interior of a number roller 25 in the axial direction with the associated outer elements and others, in Fig.1 not fully visible, details.
  • the printed circuit 42 has a semiconductor optical element 43 in the form of an LED, which serves as a light emitter and which is briefly activated during reading of the number roller 21, 25.
  • the semiconductor optical element 43 is arranged in the center of the optical multi-prism 44.
  • the star-shaped multiple prism 44 has a serrated outer contour with, for example, four teeth formed as a prism with inner double reflection. The task of this multiple prism 44 is to divide the light of the semiconductor optical element 43 into individual light beams and to focus.
  • the Light transmission of a code segment 29 is advantageously limited to light of a defined wavelength. Such light can be light invisible to the eye, for example infrared light. Focused light rays strike the readout process in the area of translucent code segments 29, light guides 53 to 57 arranged in the same pitch with the multiple prism 44.
  • the light beams for the light guides 57, 55 and 56 are opaque code segments 30 interrupted and visible to the light guides 53 and 54 through the translucent code segment 29.
  • the visible light beams are fed via the light guides 53, 54 via internal reflection at the angled point to the associated optical semiconductor element 52 designed as a light receiver.
  • a five-digit binary number is formed via a later described evaluation. If a light transmission is defined as a logical "1" and a light block as a logical "0", the five-digit binary number 00110 is generated here in the read-out torque.
  • the Figure 3 shows the schematic diagram of the optoelectronic elements (light emitter) 43 and 52 (light receiver) with the microprocessor 58, and the light-conducting elements Learnfaprisma 44 and light guides 53 to 57.
  • the dashed lines represent the light or data paths.
  • Each individual light or data path can be referred to as a through-beam sensor in the embodiment according to the invention.
  • the device shown in the present example accordingly comprises thirty one-way light barriers in the case of six numbered rollers 21, 25 and five optical scanning points per number roller 21, 25.
  • the per numerical roller 21, 25 five reading points are arranged within a semicircle with regular division.
  • the pitch angle is in the example shown 36 °, but may also have other values, or a multiple of 36 °. Likewise, the division could also be irregular.
  • the binary data read out via the light receiver 52 at the microprocessor 58 are available at the same time per number wheel 21, 25.
  • the influence of the translucent and opaque code segments 29, and 30 of the individual number rollers 21, 25 is not shown in this schematic diagram.
  • the 4 to 6 show details of a number role 25.
  • two indexing teeth 32 visible, which per revolution of this numerical roller 25 via the shift pinion 31, the next higher number roller 25 moves to a digit position on.
  • each numerical roller 25 according to Figure 6 on the other side a continuous internal teeth 33 on.
  • number roller 21 has, as a difference to the number of rollers 25, on the right side an internal toothing 22, in which engages an unillustrated drive of the counter.
  • the number roller 21 also has on the left, not directly visible, indexing teeth 32.
  • the Figure 7 shows a three-dimensional representation of the inventive reading device for a roller counter. It can be seen here that each of the five optical scanning positions of each individual number roller 21, 25 leads via the light guides 53 to 57 to a light receiver 52 assigned to each scanning position.
  • the function of the read-out device according to the invention is explained in more detail below using the example of a read-out process.
  • the read-out process is started on demand with a programmed command from the microprocessor 58.
  • the read-out process proceeds sequentially by activating the light emitter 43 in a step-by-step manner, starting, for example, at the number roller 21, in each successive number roller 25. Its light is then thrown radially through the multiple prism 44 on the five positions of the peripheral elements, ie on the light guide 53-57, but this reaches only in those positions where a translucent code segment 29 is in the radial light beam.
  • Continuous light is directed to one or more light receivers 52 via one or more of the light guides 53-57.
  • a receiver 52 generates a logical "1" at the corresponding input of the microprocessor 58 when receiving light.
  • the position of each individual number roller 21, 25 is mapped with a five-digit binary information in Gray code.
  • the read-out resolution per number roller 21, 25 is not limited only to the number of divisions shown. With the device according to the invention, thirty different positions can be defined logically on the circumference of a number roller 21, 25. With a corresponding effort in terms of number of photocells and code segments 29, 30 can, if necessary, even a larger readout resolution can be achieved.
  • the five light barriers per number roller 21, 25 shown as an example result in thirty different codes as a binary number in the case of a full revolution through 360 °.
  • an optical receiver 43 (phototransistor) is mounted within the number of rollers 21, 25 per number roller 21, 25, over which the multiple prism 44 is located, the latter being defined radially by the number roller 21, 25 in five Directions incident light to the optical receiver 43 passes and wherein the five defined radial incident directions between two directions each include an angle of 36 °.
  • each number roll 21, 25 on a part of the width of the whole Number of six successive segments attached at angles of for example 96 °, 24 °, 60 °, 96 °, 24 ° and 60 °, each of which alternately a code segment 30 for the light of the wavelength used by the receiver 43 and the emitter 52 is impermeable and the next following code segment 29 is transparent to the light of the wavelength used, and five light-emitting elements are mounted outside the number wheels, from which light guides 53-57 the light per emitting element in one of the five through the light guides 53-57 on the receivers 43rd Defined directions to the area of each 21, 25 payroll direct, where are the six segments 29, 30 described above.
  • the number rollers 21, 25 are advantageously designed so that in the width of the number wheels on the right side, where inside the number roller 21, 25, the internal teeth 33 for driving the number rollers 21, 25 are located by the shift pinion 31, outside the digits 28 are applied from 0 to 9, and that on the left side of the numerals 28, the six transmissive or opaque code segments 29, 30 are located, with an impermeable segment in the region where the two teeth 32 for the indexing of the Wegritzels 31st after a full turn of the number roller 21, 25 are.
  • the number wheels 21, 25 may be formed as a plastic injection molded part produced in two operations, in which the inner part is made of a material impermeable to the light used (eg black colored plastic), where the inner part is the splines 32, 33 and the guide for centering on the carrier drum 11, and which is divided on the left in 3 segments, which together with their Interspaces, the six code segments 29, 30 described above form, and of a material transparent to the light used, from which an outer ring is injected, for example, white unfilled plastic when using infrared light elements.
  • the numbers 28 on the number of rollers 21, 25 can be applied by printing or hot stamping on the outer circumference, taking care that the numbers 28 do not cover the code segments 29, 30.
  • the light guide elements 53-57 can be designed in a known manner as transparent elements with total reflection surfaces or with external mirror reflection surfaces.
  • An advantageous variant of the outside of the number wheels 21, 25 located optical elements comprises a printed circuit 51, on which in addition to five opto-elements 52 for generating the five signals per number roller 21, 25 and a microprocessor 58 with the necessary additional elements for the control and Evaluation of the optoelectronic elements and the connections for a data transmission interface is applied.
  • Five plastic optical fibers 35-57 with a number of optical fiber arms corresponding to the number of pulleys 21, 25 receive the light from all the pulleys 21, 25 on an optical element 43 in the variant where the outer optical elements 52 are receivers, for example phototransistors, respectively distribute the light to all six number wheels 21, 25, where the outer opto elements are emitters, for example light-emitting diodes.
  • the five Opto elements 52 on the outer printed circuit 51 and the five plastic light guides 53-57 are designed such that the light received or emitted by them is respectively directed in the area of the code segments 29, 30 on the axis of rotation of the number roller 21, 25 and the five directions below include angles of 36 °.
  • the five through-beam sensors result in a full revolution of a numerical roller 21, 25 by 360 °, the following 30 codes as a binary number: angle of rotation Displayed numeral Code (as a binary number) 0 ° 0 0 0 1 1 0 12 ° 0 0 0 1 1 1 24 ° 0 1 0 1 1 1 1 36 ° 1 1 0 0 1 1 48 ° 1 0 0 0 1 1 60 ° 1 0 1 0 1 1 72 ° 2 0 1 0 0 1 84 ° 2 0 0 0 0 1 96 ° 2 0 0 1 0 1 108 ° 3 0 0 1 0 0 120 ° 3 0 0 0 0 0 ° 132 3 0 0 0 1 0 144 ° 4 1 0 0 1 0 0 168 ° 4 1 0 0 0 1 180 ° 5 1 1 0 0 1 1
  • the light guide elements 53-57 can be designed in a known manner as transparent elements with total reflection surfaces or with external mirror reflection surfaces.
  • the material used is preferably a suitable plastic.
  • the readout is in principle same as previously described.
  • the five light sources are activated in turn per number roller 21, 25 and the position of each number roller 21, 25 is read out as a binary number.
  • the daylight and / or extraneous light exposed peripheral optical elements such as the light guides 53-57 with an additional non-transparent coating or sheath.
  • the geometric division of the code segments 29, 30 in the number rollers 21, 25 is arranged so that all photocells can be tested for their function in a simple and fast way. In this test, only the whole roll package with the carrier drum from the initial position (display all digits "0") rotated by 36 ° forward (display all digits "1") and turned back by 36 ° (display all digits "9"). In the case of the selected geometry of the code segments 29, 30, in this test all signals of all light barriers each assume both states and thus all light barriers can be tested. In addition, an individual scaling factor can be measured per light barrier and stored by the processor 58 in a non-volatile memory (EEPROM).
  • EEPROM non-volatile memory
  • the code segments 29, 30 are arranged in the number wheels 21, 25 such that, in the counter position "0 0 0 0 0 0 0", all light barriers have light transmission, so that the amplification of the light barriers can be measured.
  • a processor is preferably used, which can directly drive the light-emitting optoelements 43 or 52 with a sufficient current, for example 5 mA per element, and which comprises an analog-to-digital converter with a plurality of switchable inputs, with which the microprocessor, the resistor the light receiver 52, and thus can measure the luminosity.
  • the microprocessor measures the current in each of the light-emitting elements when it turns them on. Thus, a defect of an element can be detected and thus the reliability can be improved.
  • the outer optical fibers 53-57 have one arm more than the number of numerical rollers of the counter, and the inner optical element unit 43 comprises one element more than the number of numerical rollers 21, 25 of the counter.
  • the microprocessor 58 can check the function of the outer opto elements and thus improve the reliability additionally.
  • additional light shields may be provided between the inner adjacent optoelements 41.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Claims (5)

  1. Dispositif pour lire la position de rouleaux à chiffres (21, 25) d'un compteur à rouleaux comprenant des pignons d'enclenchement (31) sur un axe à l'intérieur de la circonférence desdits rouleaux (21, 25), grâce auxquels un rouleau (21, 25) de plus faible valeur, à la fin d'un tour complet, fait tourner d'un chiffre ou d'une division d'échelle le rouleau (25) de valeur plus grande, et le dispositif comporte, pour une lecture sans contact et sans contrainte de la position des rouleaux (21, 25), des barrières lumineuses disposées radialement et, pour chaque rouleau (21, 25), plusieurs barrières lumineuses composées d'un émetteur de lumière (43) avec plusieurs récepteurs (52) ou de plusieurs émetteurs de lumière (43) et d'un récepteur (52), les rouleaux à chiffres (21, 25) comportant pour déterminer la position à l'aide des barrières lumineuses au moins un segment de code translucide (29) et au moins un segment de code opaque (30) qui s'étendent sur des angles différents,
    caractérisé en ce que des barrières lumineuses disposées radialement en demi-cercle se composent d'un élément optoélectronique (41) prévu au centre de chaque rouleau à chiffres (21, 25), de plusieurs conducteurs de lumière (53-57) disposés en demi-cercle sur la périphérie, et de plusieurs éléments optoélectroniques (52) disposés sur un circuit imprimé (51).
  2. Dispositif selon la revendication 1, caractérisé en ce que l'élément optoélectronique (41) prévu au centre des rouleaux à chiffres (21, 25) est entouré par un prisme quadruple (44) qui focalise la lumière et qui est associé aux éléments périphériques.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que les éléments périphériques des barrières lumineuses sont conçus comme des conducteurs optiques de signaux entre la source lumineuse et le récepteur, sous la forme de conducteurs de lumière vitreux (53-57) .
  4. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il est prévu pour chaque rouleau à chiffres (21, 25) une disposition géométrique angulaire des segments de code translucides (29) et des segments de code opaques (30), qui permet une lecture de plus de dix positions différentes pendant un tour complet d'un rouleau (21, 25).
  5. Dispositif selon la revendication 3 ou 4, caractérisé en ce que les barrières lumineuses et les segments de code (29, 30) présentent une disposition qui produit un code Gray.
EP19990103137 1998-02-27 1999-02-18 Dispositif de lecture pour un compteur à tambours Expired - Lifetime EP0939380B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19990103137 EP0939380B1 (fr) 1998-02-27 1999-02-18 Dispositif de lecture pour un compteur à tambours

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP98810161 1998-02-27
EP98810161 1998-02-27
EP19990103137 EP0939380B1 (fr) 1998-02-27 1999-02-18 Dispositif de lecture pour un compteur à tambours

Publications (2)

Publication Number Publication Date
EP0939380A1 EP0939380A1 (fr) 1999-09-01
EP0939380B1 true EP0939380B1 (fr) 2008-03-26

Family

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Family Applications (1)

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EP19990103137 Expired - Lifetime EP0939380B1 (fr) 1998-02-27 1999-02-18 Dispositif de lecture pour un compteur à tambours

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EP (1) EP0939380B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009003976A1 (de) 2009-01-07 2010-07-08 Hengstler Gmbh Vorrichtung zur optischen Abtastung der Teilstriche eines mechanischen Rollenzählwerkes

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102706374B (zh) * 2012-06-12 2015-05-27 深圳天行健电子有限公司 圆盘光电编码测角读数装置
CN103471640A (zh) * 2013-09-06 2013-12-25 刁宇浩 智能计量仪表的数码直读器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1410912A (en) * 1971-09-08 1975-10-22 Counting Instr Ltd Meter reading systems
IT1215727B (it) * 1988-01-18 1990-02-22 Sacofgas Spa Dispositivo trasduttore perfezionato.
GB8812760D0 (en) * 1988-05-28 1988-06-29 Smith Meters Ltd Counter
FR2656444B1 (fr) * 1989-12-27 1992-04-17 Sagem Appareil d'edition de facturettes.
EP0660263B1 (fr) * 1993-12-23 2000-03-01 GWF Gas- & Wassermesserfabrik AG Procédé pour lire les position des roues d'un compteur à rouleaux à plusieurs chiffres pour un compteur de débit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009003976A1 (de) 2009-01-07 2010-07-08 Hengstler Gmbh Vorrichtung zur optischen Abtastung der Teilstriche eines mechanischen Rollenzählwerkes
WO2010079129A2 (fr) 2009-01-07 2010-07-15 Hengstler Gmbh Dispositif de détection optique des graduations d'un compteur à rouleaux mécanique

Also Published As

Publication number Publication date
EP0939380A1 (fr) 1999-09-01

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