EP0382026A1 - Méthode et circuit de connexion d'un compteur électronique à un dispositif lecture-affichage - Google Patents

Méthode et circuit de connexion d'un compteur électronique à un dispositif lecture-affichage Download PDF

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Publication number
EP0382026A1
EP0382026A1 EP90101653A EP90101653A EP0382026A1 EP 0382026 A1 EP0382026 A1 EP 0382026A1 EP 90101653 A EP90101653 A EP 90101653A EP 90101653 A EP90101653 A EP 90101653A EP 0382026 A1 EP0382026 A1 EP 0382026A1
Authority
EP
European Patent Office
Prior art keywords
counter
reader
writer
voltage
signal
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.)
Granted
Application number
EP90101653A
Other languages
German (de)
English (en)
Other versions
EP0382026B1 (fr
Inventor
Jürgen Dipl.-Ing. Adams (FH)
Thomas Dipl.-Ing. Riester (Fh)
Lothar Dufner
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.)
Digital Kienzle Computersysteme GmbH and Co KG
Original Assignee
Mannesmann Kienzle 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 Mannesmann Kienzle GmbH filed Critical Mannesmann Kienzle GmbH
Publication of EP0382026A1 publication Critical patent/EP0382026A1/fr
Application granted granted Critical
Publication of EP0382026B1 publication Critical patent/EP0382026B1/fr
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Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/16—Electric signal transmission systems in which transmission is by pulses

Definitions

  • the invention relates to a method and a circuit arrangement for coupling an electronic counter for registering wheel revolutions to a reader / writer that can be connected with simple means for the purpose of data coupling and data coupling into and out of an electronic counter.
  • Counters for registering wheel revolutions on a vehicle serve a variety of purposes, with the primary point being data-based recording of distances.
  • Control measures can be derived from such a detection of the distances traveled by a vehicle, for example, the maintenance intervals can be determined based on the specified mileage, or profitability calculations can be made based on the mileage.
  • the wheel revolution counters which are usually mounted on a wheel hub or an axle cap, must meet the stricter conditions of a control device and ensure a high degree of security against manipulation.
  • the reading of a display counter is not free from subjective influence, since reading errors due to a high degree of contamination of the display are unavoidable.
  • the counter in known embodiments of the wheel revolution counter is equipped with an integrated printing unit.
  • the additional printing of an identification number is indispensable because of the indispensable requirement for an unambiguous assignment of the data to the vehicle.
  • the printing device for this again requires an increased space requirement, so that a desired, small size of the wheel revolution counter in dimensions that are still justifiable can hardly be realized.
  • a registration of mileage with the wheel revolution counter should be possible without restriction by installing the designated device not only in the commercial vehicle but in all vehicles and trailers, whereby regulations regarding protruding add-on parts and aesthetic appearance, e.g. in the car sector, have a decisive influence on the design of the wheel revolution counter.
  • a slot opening must be provided through which a document to be printed can be inserted into the printing unit.
  • this opening also means that, despite the covering measures, there is access from the outside into the interior of the counter, through which attempts at manipulation and the penetration of moisture and aggressive dirt, in particular due to the extremely loaded field of use, cannot be prevented.
  • the object of the invention is therefore to design an electronic counter in a hermetically sealable housing with simple, inexpensive means that can be coupled to a reader in such a way that as little environmental influences as possible affect the connection and that during the communication process the meter can be supplied with energy from the reader / writer is so that the internal energy sources of the meter do not have to be burdened.
  • a wheel revolution counter is provided according to the exemplary embodiment according to FIG. 4, which is attached to the axle cap or directly to the wheel hub RN of the vehicle wheel.
  • the electronics of an axle revolution counter mechanism E2 are located in a housing that is absolutely sealed against the harsh environmental conditions on a vehicle wheel and are not described in any more detail. It is a counter that is buffered and operated with a primary cell.
  • B. is provided by means of a Wiegand element on a pendulum.
  • the Wiegand sensor is well suited for use as a pulse generator because the size is small compared to other sensors.
  • the amplitude of the pulse of a Wiegand sensor is also independent of the rate of change of the magnetic field strength, so that even very slow path changes can be measured without losses in the signal amplitude.
  • the arrangement of the electronic counter E2 also includes a readout circuit z. B. in the form of a shift register, which in use, d. H. is operated by an external energy source during a reading process.
  • a read / write device E1 that can be connected with simple means is provided for transmitting the data information that can be stored in the counter E2.
  • non-galvanic that is contactless circuit means such as inductive and capacitive coupling methods are conceivable, but require incomparable effort with regard to circuit means.
  • the electronic numbering unit E2 together with the primary cell, pendulum and pulse generator, is located in a cylindrical housing arranged coaxially to the wheel hub, the housing simultaneously performing the function of the connecting line V2 or the housing serving as a reference contact.
  • an insulated contact surface is arranged in the middle of its axis, which serves as a connecting line V1 for the application of operating voltage, signal voltage and signal current when coupling the reading device E1.
  • the coupling piece belonging to the reading device E1 is designed such that the middle contact of the counter E2 is contacted in a frictional manner during coupling and the second contact line of the reading device is designed as a latching device and engages in the circumference in the meter housing.
  • This arrangement has the advantage that when the reader E1 is placed on it, contamination of the contact points by friction is eliminated.
  • a contact check is carried out such that a supply voltage U1 to the contacts of the interface of the Ver Binding lines V1, V2 is applied and the quiescent current 11 flowing thereby complies with or exceeds a minimum value.
  • the signal S1 should indicate that the voltage U1, the supply voltage ultimately for the electronics of the counter E2, can be switched off and is therefore of subordinate importance for the function.
  • the electronics of the electronic counter E2 for determining the number of revolutions of the axis control a signal current 13 via the signal line S3 or effect a modulation of the signal current 13, the effect of which is ultimately evaluated in the reader E1 via the connecting line V2.
  • the supply voltage U1 is a voltage that can be switched on and off via the signal line S1 for operating the electronics of the counter E2 and is applied by the reading device E1 during the interrogation and reading phase.
  • U2 denotes a signal voltage U2 which is generated in the reader E1 and can be switched or modulated via the signal line S2 (see FIGURES 1 and 3).
  • the voltage U2 is switched on and off by the signal S2 and thus modulates the voltage on the connecting lines V1 and V2 for the clock information.
  • the signal voltage U2 acts as a counter voltage to the supply voltage U1.
  • U1 is reduced by U2, and the following applies accordingly with U2 switched off: U1 is not reduced (since U2 is approximately equal to 0, see also the discrete circuit according to FIG. 3).
  • a constant supply current for operating the electronics of the counter E2 is designated by 12.
  • the supply current 12 must be constant so that the total current 11 is changed only by the signal current 13.
  • a circuit comprising the components FET transistor T3 of a Zener diode Z3 is provided in the electronics of the counter E2, via the latter a capacitor C z3 and an isolating capacitor C T.
  • the constant current sink SS is essentially formed from the FET transistor T3 with a "fixed" gate.
  • the Zener diode Z3 has the function of a voltage stabilizer for the electronics in the counter E2.
  • the voltage which can be tapped at the tens diode Z3 is approximately 3 V and is the supply voltage for the electronics of the counter E2.
  • the supply current 12 which is regulated by the FET transistor T3, is divided into the current through the Zener diode Z3 and the actual supply current for the electronics of the counter E2.
  • the capacitor C z3 serves as a filter capacitor for buffering the supply voltage for the counter E2 (also for filtering current surges, etc.).
  • the isolating capacitor C T serves to isolate the DC voltage in order to obtain the clock information.
  • the voltage U2 acts on the clock line.
  • the diagram according to 2.1 shows a total voltage of U1 + U2, the voltage U1 generating the potential u1 and the voltage U2 by superimposing it Potential u2 generated. This shows a clock signal u1, u2.
  • the diagram 2.2 according to FIG. 2 shows the total current 11, which consists of the constant supply current 12 for the electronics of the counter E2 and the superimposed, modulated current 13. A 0/1 sequence of data bits is shown, which are sent from the electronics of the counter E2 to the reading device E1.
EP90101653A 1989-02-04 1990-01-27 Méthode et circuit de connexion d'un compteur électronique à un dispositif lecture-affichage Expired - Lifetime EP0382026B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3903377A DE3903377A1 (de) 1989-02-04 1989-02-04 Verfahren und schaltungsanordnung zur ankopplung eines elektronischen zaehlwerkes an ein lese-/schreibgeraet
DE3903377 1989-02-04

Publications (2)

Publication Number Publication Date
EP0382026A1 true EP0382026A1 (fr) 1990-08-16
EP0382026B1 EP0382026B1 (fr) 1994-07-20

Family

ID=6373457

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90101653A Expired - Lifetime EP0382026B1 (fr) 1989-02-04 1990-01-27 Méthode et circuit de connexion d'un compteur électronique à un dispositif lecture-affichage

Country Status (3)

Country Link
EP (1) EP0382026B1 (fr)
DE (2) DE3903377A1 (fr)
NO (1) NO900503L (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10254128B2 (en) 2016-07-09 2019-04-09 Diehl Metering Systems Gmbh Control device for a meter device, particularly a water meter device, and meter device, particularly a water meter device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19610024A1 (de) * 1996-03-14 1997-09-18 Stefan Haeckel Vorrichtung zur Aufzeichnung von Fahrten eines Fahrzeugs
DE19950655C2 (de) 1999-10-21 2001-08-16 Telefunken Microelectron Verfahren zur auf eine Versorgungsgleichspannung aufgelagerten Signalübertragung in einem Bussystem
DE10335904B4 (de) * 2003-08-06 2018-12-13 Robert Bosch Gmbh Verfahren und Vorrichtung zur bidirektionalen Eindraht-Datenübertragung
DE10335905B4 (de) 2003-08-06 2018-07-05 Robert Bosch Gmbh Verfahren und Vorrichtung zur bidirektionalen Eindraht-Datenübertragung
DE102017114701A1 (de) * 2017-06-30 2019-01-03 Innogy Se Optischer Auslesekopf für Verbrauchsmengenzähler

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3875505A (en) * 1973-05-29 1975-04-01 Boeing Co Data collection system and apparatus suitable for use therein
EP0134174A1 (fr) * 1983-08-19 1985-03-13 LA DETECTION ELECTRONIQUE FRANCAISE PROTECBAT Société dite: Procédé de transmission de messages entre un poste central et plusieurs postes éloignés

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3875505A (en) * 1973-05-29 1975-04-01 Boeing Co Data collection system and apparatus suitable for use therein
EP0134174A1 (fr) * 1983-08-19 1985-03-13 LA DETECTION ELECTRONIQUE FRANCAISE PROTECBAT Société dite: Procédé de transmission de messages entre un poste central et plusieurs postes éloignés

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10254128B2 (en) 2016-07-09 2019-04-09 Diehl Metering Systems Gmbh Control device for a meter device, particularly a water meter device, and meter device, particularly a water meter device

Also Published As

Publication number Publication date
EP0382026B1 (fr) 1994-07-20
DE59006457D1 (de) 1994-08-25
NO900503D0 (no) 1990-02-02
DE3903377A1 (de) 1990-08-09
NO900503L (no) 1990-08-06

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