WO2010079129A2 - Dispositif de détection optique des graduations d'un compteur à rouleaux mécanique - Google Patents

Dispositif de détection optique des graduations d'un compteur à rouleaux mécanique Download PDF

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Publication number
WO2010079129A2
WO2010079129A2 PCT/EP2010/000036 EP2010000036W WO2010079129A2 WO 2010079129 A2 WO2010079129 A2 WO 2010079129A2 EP 2010000036 W EP2010000036 W EP 2010000036W WO 2010079129 A2 WO2010079129 A2 WO 2010079129A2
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WO
WIPO (PCT)
Prior art keywords
marks
swallow
mark
reflection
reflector
Prior art date
Application number
PCT/EP2010/000036
Other languages
German (de)
English (en)
Other versions
WO2010079129A3 (fr
Inventor
Herbert Deichmeyer
Frieder Liebermann
Norbert Hoffmann
Jörg LUTTMER
Original Assignee
Hengstler Gmbh
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 Hengstler Gmbh filed Critical Hengstler Gmbh
Publication of WO2010079129A2 publication Critical patent/WO2010079129A2/fr
Publication of WO2010079129A3 publication Critical patent/WO2010079129A3/fr

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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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
    • G06K19/06046—Constructional details

Definitions

  • the invention relates to a device for the optical scanning of graduations of a mechanical roller counter according to the preamble of patent claim 1.
  • Such a device has become known, for example, in the subject matter of DE 197 19 459 A1.
  • a photosensitive matrix sensor which is designed as a CCD matrix, the reflection image of numbers and graduations applied to the number of roles received and evaluated.
  • the evaluation of the measurement signals of the CCD matrix is cost-intensive, because a relatively complex decision logic is required for this.
  • a number of receiving diodes are arranged, which receive the bar code, which is emitted by the number role, and further process accordingly.
  • Disadvantage of the arrangement is that in each number role its own light source must be arranged, which is associated with high costs. After the number role rotates, if necessary, also the axis on which the number role is arranged to be made translucent.
  • Another disadvantage of the arrangement is that you have to attach to the power supply of the LEDs between the philosophicalroüen corresponding rotatably arranged supply modules to allow the power supply for the arranged in the number role light emitting diode.
  • the entire counter must be replaced, which is associated with high costs.
  • the preliminary equipment of such a number of figures is relatively expensive, because if you want to retrofit such figures with the aforementioned evaluation logic, it is necessary to attach a light source in each number role.
  • a light barrier is arranged which consists of a transmitting and receiving diode and the light beam of this light barrier passes directly through a lateral surface of the respective number roller.
  • a four-track code is arranged, which generates a code in the receiving diode with a corresponding rotation of the number roller.
  • each photocell is associated with a number role, a very wide structure of the number role field is given and otherwise such an arrangement is very sensitive to axial misalignment of fortuneroüen. It is known that such number rollers sit with little axial offset on the drive shaft and are rotated and with only a small axial offset leads to a misreading of closely spaced code tracks.
  • a four-fold forked light barrier must be used with four number wheels, which is associated with a high effort and with a corresponding conversion effort in the conversion of a conventional stepping mechanism to a thus readable stepping mechanism.
  • EP 0 325 565 A1 has disclosed a stepping mechanism in which a coding disk with different code tracks is arranged between the numbered rollers.
  • the separate installation of a code disc between the number wheels increases undesirably the installation width of the numbers and incidentally, a subsequent retrofitting of such a number of roller work is not possible.
  • the invention is therefore based on the object, so on to form a device for optically scanning the graduations of a mechanical roller counter that a high read-off security exists that no or only a small risk of contamination and that a side play of the number roles does not affect the accuracy of reading.
  • An essential feature of the invention is that an optical transmitting and receiving unit is fixed to the housing opposite the individual number wheels arranged and that on the mantle of each number role on which the with bare Eye recognizable numerals or markers are arranged, a plurality of reflection marks are arranged, which interact via an optical transmission and reception path with the aforementioned optical transmitter and receiver.
  • each number role now carries itself directly on its lateral surface one or more reflection marks, so that an electronic readout system can be installed without replacing the number wheels.
  • the invention is not limited to the above-mentioned embodiment.
  • the reflection marks or swallow marks are applied by injection molding in the production of the number role.
  • the reflection marks are either visible to the naked eye or invisible. Such invisible printing can take place both in the UV range and in the IR range.
  • swallow marks When it comes to the attachment of swallow marks, it may be provided that in the lateral surface one or more slit-shaped or rectangular Recesses are already applied in the production of the number role in the injection molding process, so as to achieve already fully integrated swallowing marks.
  • swipe mark is understood to mean that it is not a reflection mark, but a mark that absorbs the incident light beam and no longer gives (swallows).
  • one or more embodiments are provided in which the light entering the swallow mark is picked up by a reflector located behind it in the number roller and blasted through the same swallow mark either back or through another mark on the receiving diode.
  • Such an arrangement can also be retrofitted and it is particularly susceptible to contamination, because it can be retrofitted even in humid and polluted environment, because the evaluation of reflection and swallow marks is particularly simple.
  • Figure 1 Schematized hole diagram of the evaluation of a counter
  • Figure 2 A more detailed representation of the evaluation with reflection marks on the example of a single number role.
  • Figure 3a Schematome the representation of reflection marks, which are arranged in other ways on the mantle of the number role.
  • FIG. 3b shows an embodiment modified with respect to FIG. 3a.
  • FIG. 3c an embodiment modified with respect to FIGS. 3a and 3b.
  • FIG. 4a An embodiment of the invention with attachment of swallow marks.
  • FIG. 4b an embodiment modified with respect to FIG. 4a.
  • Figure 4c A modified compared to Figure 4a and 4b further
  • FIG. 4d shows a third embodiment in comparison with FIG. 4a.
  • Figure 5 The representation of the subsequent installation of a cultivation counter to a conventional counter.
  • FIG. 6 Various embodiments for illustration, as a
  • Read-out unit can be placed on the housing of a counter to read the data.
  • FIG. 7 shows the unwound surface of a number wheel with a Gray code
  • FIG. 8 is an illustration of a lens capable of detecting the code of FIG.
  • FIG. 9 shows a schematic representation of the evaluation of number wheels with a linear sensor.
  • Figure 10 schematically illustrated arrangement for detecting the Drehhchtung the number roles.
  • a counter 8 consists of a number of separately driven number wheels 11, wherein a stepping mechanism is not shown in detail.
  • Each number role carries on the mantle a plurality of reflector fields 7, wherein each optically recognizable digit or mark such a quadruple reflector field 7 is assigned.
  • the invention is not limited to the arrangement of a quadruple reflector field, which is associated with each optically recognizable digit of the number roller. This is only to be understood as an exemplary embodiment.
  • Other reflector fields can be used, such as. As a Gray code or an alternative binary code such. B. a bar code.
  • FIG. 1 shows the evaluation circuit, where it can be seen that a transmitting diode 12 and a receiving diode 13 are assigned to each number roller in a housing-side optical transmitter and receiver.
  • the transmitter diode therefore sends a transmit beam 21 (see FIG. 2) against the filter chip 7 and the receive diode 13 receives the received signal. and evaluate this.
  • the signal received in the optical transmitter and receiver is received in the form of seven channels, wherein it is important that only one at a time
  • the invention is not limited to the evaluation of seven number wheels in a counter 8.
  • the signal received in the one channel is demodulated by the demodulator 2a, rectified in the rectifier 3 and amplified in the amplifier 9.
  • a voltage stabilizer 10 is connected to the amplifier.
  • the signal generated in the amplifier 9 is supplied to a microcontroller 5, which digitally processes the signal and outputs it as a digital signal via the interface 6 in the line 14 into it.
  • the microcontroller 5 controls a modulator 2, which performs a light modulation of the transmitting diode 12 in order to protect it against extraneous light influences.
  • This modulated signal is supplied via the multiplexer 4 to the respective operating channel of the optical transmitter and receiver.
  • modulation in the modulator 2 also takes place so as not to influence the demodulation in the demodulator 2a.
  • each digit 16 or any recognizable with the naked eye coding is also associated with a reflector field 7 at the same time.
  • the reflector field 7 in total consists of four differently arranged reflection marks 17, 18, 19, 20, which are arranged in the form of a rectangle. It is therefore the same size reflection marks, which are arranged in a quadrangular arrangement.
  • each reflection mark 17-20 is also associated with a corresponding receive diode 13a-13d so that a digital readout of the light of each reflection mark 17-20 takes place directly.
  • the number of receive diodes deviated from the number of reflection marks it would be a simple gray value readout, which is difficult to read and only provides a useful measurement result with a high level of digital outlay.
  • each reflection mark 17-20 transmits its own reflection beam 22a, 22b, 22c, 22d and accordingly only the corresponding receiving diode 13a, 13b, 13c, 13d are exposed ,
  • the reflection mark 18 is not reflected and designed as a swallow mark. That is, it absorbs the incident light and no longer returns this in the form of a reflection beam or the reflected signal is significantly weaker than with reflection marks.
  • FIG. 3 a shows that the reflection marks 17 - 20 do not have to be distributed as a quadruple field over the entire width of the lateral surface 15 of the number roller, but they can also be mounted one behind the other in the form of a linear arrangement on the lateral surface. This is a question of the space available, how such reflection marks can be assigned to an optically recognizable number 16.
  • FIGS. 3a and 3c show a different arrangement of reflection marks arranged linearly with one another, with FIG. 3a showing that such reflection marks can also extend over the width of the lateral surface below or above an optically recognizable digit 16, and FIG. 3c, for example, shows a similar representation 3a, where it can be seen that one of the reflection marks is designed as a swallow mark 23.
  • Such a swallow mark can either consist of a light-absorbing surface that is flush with the surface of the other reflection marks or it can also be used as a depression in the shell 15 of the number role are formed. This is shown by the following exemplary embodiments according to FIGS. 4a-4d.
  • the advantage of this arrangement is that the transmission beam 21 can radiate relatively large area through a receiving slot 25 and that then in the region of the reflector, a discrimination of the beam irradiated there to the differently arranged transmission marks 36a - 36d.
  • FIG. 4b shows that the reflector does not have to be present continuously, but it is possible to provide a plurality of transmission radiations 21, each transmission radiation 21 being associated with a corresponding marker 23a, 23b, 23c, 23d and, for example, depending on the encoding of the Swallowing marks only one or more of these swallowing marks a reflector 24 is assigned.
  • some marks 23a, 23b, 23c swallow the light, while the other marks 23d again reflect the transmission beam in the form of a reflected beam onto the receiving unit.
  • FIG. 4c shows another type of reflector in which, for example, the reflector can extend over the entire width of the sip marks. Again, it may be provided that the reflector only partially reflected and accordingly has blackened areas that send back no more light with respect to the corresponding swallow mark.
  • FIG. 4d shows, in principle, the same exemplary embodiment as FIG. 4a, where it can be seen that the transmission radiation is received via a common reception slot and is radiated back again via separate transmission marks 36a, 36b.
  • Figure 5 shows the possibility of growing or retrofitting an existing counter 8, in which it can be seen that serving to drive the counter 8 stepper, consisting of a drive shaft 28 with a corresponding drive pinion for driving the stepper 29 at the same time a cultivation counter 26 can be flanged, which is driven by the same drive as the counter 8.
  • a cultivation counter consists of number wheels of all the aforementioned embodiments, in which case it is shown only schematically that each number roller 27a, 27b, a number of reflection marks 17, 18 are assigned. It is again repeated that the reflection marks can be formed in any embodiment of the previously described embodiments, ie also as swallow marks 23.
  • FIG. 6 shows such a subsequently developed counter, where it can be seen that the add-on counter 26 is installed in the housing 33 of the counter and the housing has, for example, an upper receptacle 35.
  • the digitally readable attachment counter 26 in this case has, for example, two readout areas 31, 32 which are arranged at an angle of 90 ° to one another, and according to the invention only one readout area 31 or 32 can also be present.
  • the evaluation electronics 30 according to the invention are placed on the upper read-out area 31, as shown in FIG. 1 as a block diagram, and can receive and forward the digital signals of the number wheels of the add-on register 26 via the upward read-out area 31.
  • a housing 34 may be formed without receptacle 35 and in this case the evaluation electronics 30 directly frontally before the forward reading range 32 can be pre-set to allow digital reading.
  • FIG. 7 shows the processing of the digits of a number roller, the digits being assigned a Gray code.
  • the Gray code is characterized by the fact that only one bit changes when changing.
  • the film with the Gray code printing is wound on the number role.
  • the lateral surface 15 of the number role is shown in the development in Figure 7, wherein the digits 0 to 9 are encoded in Gray code.
  • each digit is associated with a reflector field 7, and each reflector field consists of a grid area 42, for example, a four-bit code is specified. As a result, each numeric field consists of four grid areas 32.
  • the third grid surface 42 is formed from the left as the coding field 41.
  • This coding field preferably consists of a coloring with a color not visible to the naked eye, which is preferably visible in the UV light range.
  • FIG 8 an evaluation system is shown in which a number of number wheels with associated lateral surfaces 15a, 15b, 15c, 15d, etc. are read, for example, the number of roles 15a is in a certain state and just z. B. indicates the number 1, while the number role 15b just displays the number 3, etc.
  • a total of a plurality of number wheels in the exemplary embodiment a total of eight number wheels
  • the sensor width is about 8 mm, and the lens is relatively flat and has a height of only 2 to 3 mm.
  • the sensor array (readout area 33) has an area of e.g. 128 pixels.
  • FIG. 9 shows a band-shaped sensor 43 which consists of sensor elements 46 (pixels) attached to one another in a line.
  • sensor elements 46 pixels
  • 128 sensor elements can be added to each other.
  • the width of the sensor elements 46 may be formed equal to or smaller than the total width of the counter.
  • a high-resolution sensor 43 is involved, because a suitable distinction between radially incoming beams 45 9, while a sensor 43 with a low resolution is required in FIG. 9, because only digital recognition of 0 and 1 states is required.
  • each coding field 41 falls on four successive sensor elements 46 and is detected by them.
  • a fixedly mounted metal plate 50 is connected in a rotationally fixed manner to the drive axle 28 of the counter.
  • the arrangement can be arranged inside, but also outside of the meter housing 54.
  • the embodiment of Figure 10 does not show that the metal plate 50 can be arranged on the least significant number of roles 11, because this can also rotate according to the direction of rotation of the drive shaft 28 forward and backward.
  • the metal plate 50 is opposed to an eddy current sensor 51 is arranged, which detects the direction of rotation and the rotational speed of the metal plate 50.
  • the signals of the eddy current sensor 51 are supplied via a signal line 52 to the microcontroller 5, at the output via a line 53, a display 55 is driven, on which the direction of rotation of the drive shaft 28 can be displayed.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Image Input (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

La présente invention concerne un dispositif de détection optique des graduations d'un compteur à rouleaux mécanique comprenant une pluralité de rouleaux de compteur (11) entraînés en rotation dont la surface périphérique (15) présente des marques (17-20, 23) qui sont reconnues et peuvent être évaluées par un dispositif de réception solidaire du boîtier. L'invention se caractérise en ce qu'une unité d'émission et de réception optique (1) est disposée de manière solidaire au boîtier par rapport aux rouleaux de compteur (11) individuels et en ce que la surface périphérique (15) de chaque rouleau de compteur (11) sur laquelle se trouvent des chiffres ou des marques reconnaissables à l'oeil nu, comporte d'autres marques (17-20, 23) qui interagissent avec l'unité d'émission et de réception optique (1) via une trajectoire d'émission et de réception optique (21, 22).
PCT/EP2010/000036 2009-01-07 2010-01-07 Dispositif de détection optique des graduations d'un compteur à rouleaux mécanique WO2010079129A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910003976 DE102009003976A1 (de) 2009-01-07 2009-01-07 Vorrichtung zur optischen Abtastung der Teilstriche eines mechanischen Rollenzählwerkes
DE102009003976.7 2009-01-07

Publications (2)

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WO2010079129A2 true WO2010079129A2 (fr) 2010-07-15
WO2010079129A3 WO2010079129A3 (fr) 2010-09-02

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WO (1) WO2010079129A2 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4636637A (en) 1985-10-24 1987-01-13 James Van Orsdel Method and apparatus for detecting motion through a transparent enclosure, with spurious information detecting and compensating means
EP0325565A1 (fr) 1988-01-18 1989-07-26 FABBRICHE RIUNITE MISURATORI SACOFGAS S.p.A Capteur
EP0344931A2 (fr) 1988-05-28 1989-12-06 Smith Meters Limited Compteur
EP0435763A1 (fr) 1989-12-27 1991-07-03 Societe D'applications Generales D'electricite Et De Mecanique Sagem Appareil d'édition de facturettes
EP0660263A1 (fr) 1993-12-23 1995-06-28 GWF Gas- & Wassermesserfabrik AG Compteur à rouleaux à plusieurs chiffres pour un compteur de débit
DE19719459A1 (de) 1997-05-07 1998-11-12 Inotech Ges Fuer Entwicklung U Vorrichtung zur Abtastung der Teilstriche eines mechanischen Rollenzählwerkes bei Zählern aller Art
DE10012064A1 (de) 2000-03-14 2001-09-27 Gatz Klaus Werner Vorrichtung zur optischen Zählerstandserfassung an einem Rollenzählwerk
EP0939380B1 (fr) 1998-02-27 2008-03-26 MR Engineering AG Dispositif de lecture pour un compteur à tambours

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB815124A (en) * 1955-08-22 1959-06-17 Theodorus Reumeran Improvements in counter mechanisms
DE2043017C3 (de) * 1970-08-29 1978-10-26 Siemens Ag, 1000 Berlin Und 8000 Muenchen Fotoelektrisch abfragbares mechanisches oder elektromechanisches Zählwerk
CH650089A5 (de) * 1981-03-17 1985-06-28 Landis & Gyr Ag Anordnung zur darstellung des inhalts von zahlenrollen-zaehlwerken in form elektrischer signale.
CH661365A5 (de) * 1983-11-03 1987-07-15 Landis & Gyr Ag Anordnung zur darstellung und abtastung des inhalts von zahlenrollen-zaehlwerken.
ES2112177B1 (es) * 1995-09-08 1998-11-16 Alvarez Fernandez Modesto Dispositivo contador mecanico de lectura remota.
EP1184645A1 (fr) * 2000-08-29 2002-03-06 Abb Research Ltd. Capteur optique d'angle ou de position

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4636637A (en) 1985-10-24 1987-01-13 James Van Orsdel Method and apparatus for detecting motion through a transparent enclosure, with spurious information detecting and compensating means
EP0325565A1 (fr) 1988-01-18 1989-07-26 FABBRICHE RIUNITE MISURATORI SACOFGAS S.p.A Capteur
EP0344931A2 (fr) 1988-05-28 1989-12-06 Smith Meters Limited Compteur
EP0435763A1 (fr) 1989-12-27 1991-07-03 Societe D'applications Generales D'electricite Et De Mecanique Sagem Appareil d'édition de facturettes
EP0660263A1 (fr) 1993-12-23 1995-06-28 GWF Gas- & Wassermesserfabrik AG Compteur à rouleaux à plusieurs chiffres pour un compteur de débit
DE19719459A1 (de) 1997-05-07 1998-11-12 Inotech Ges Fuer Entwicklung U Vorrichtung zur Abtastung der Teilstriche eines mechanischen Rollenzählwerkes bei Zählern aller Art
EP0939380B1 (fr) 1998-02-27 2008-03-26 MR Engineering AG Dispositif de lecture pour un compteur à tambours
DE10012064A1 (de) 2000-03-14 2001-09-27 Gatz Klaus Werner Vorrichtung zur optischen Zählerstandserfassung an einem Rollenzählwerk

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WO2010079129A3 (fr) 2010-09-02
DE102009003976A1 (de) 2010-07-08

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