EP0101447A1 - Pulse counter circuit - Google Patents

Pulse counter circuit

Info

Publication number
EP0101447A1
EP0101447A1 EP19830900488 EP83900488A EP0101447A1 EP 0101447 A1 EP0101447 A1 EP 0101447A1 EP 19830900488 EP19830900488 EP 19830900488 EP 83900488 A EP83900488 A EP 83900488A EP 0101447 A1 EP0101447 A1 EP 0101447A1
Authority
EP
European Patent Office
Prior art keywords
pulse counter
oscillator
period
pulse
gate circuit
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.)
Withdrawn
Application number
EP19830900488
Other languages
German (de)
French (fr)
Inventor
Rolf Thomas
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.)
Vaillant GmbH
Original Assignee
Joh Vaillant GmbH and Co
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 Joh Vaillant GmbH and Co filed Critical Joh Vaillant GmbH and Co
Publication of EP0101447A1 publication Critical patent/EP0101447A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
    • G01K7/20—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer in a specially-adapted circuit, e.g. bridge circuit
    • G01K7/203—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer in a specially-adapted circuit, e.g. bridge circuit in an oscillator circuit
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/07—Integration to give total flow, e.g. using mechanically-operated integrating mechanism
    • G01F15/075—Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means
    • G01F15/0755—Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means involving digital counting
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K17/00—Measuring quantity of heat
    • G01K17/06—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
    • G01K7/24—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit
    • G01K7/245—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit in an oscillator circuit

Definitions

  • the present invention relates to a pulse counter circuit according to the preamble of the main claim.
  • Such pulse counter circuits are used in particular for throughput measurements and are preferably used here for heat quantity measuring circuits. It is necessary for the throughput to be measured within a certain time unit through a pipe, in particular a supply or return line from a central heating system.
  • a vane measuring wheel can be provided which emits pulses to a measuring line via a magnetic pulse generating device, the number of pulses being therefore a direct measure of the volume passed through. If the impulse is limited by a certain time, the throughput per unit of time can be determined. In order to be able to make reasonably accurate measurements here, it is necessary to keep the time in which the pulse count takes place relatively long. On the other hand, it is expensive to reproducibly generate long times with electronic means.
  • the present invention is based on the object of specifying a pulse counter circuit with which an accurate counting of pulses occurring over a certain period of time is possible, but which is considerably cheaper to set up than the prior art. This problem is solved with the characterizing features of the main claim.
  • Figure one shows a basic circuit of the invention
  • a pulse counter circuit for example for a throughput measurement for tap water, has a frequency-controlled oscillator 1, to which a measuring resistor 4 with a positive or negative temperature coefficient is connected via lines 2 and 3. This measuring resistor senses the temperature of the tap, its resistance value is directly variable with the temperature of the water.
  • a pulse voltage 6 is present at the output 5 of the oscillator 1 and is fed to a period discriminator 8 via the line 7.
  • a pulse duration 10 having a period duration 9, which is connected via a line 11 to the one input of a gate circuit 16.
  • An electrical start signal is fed to the period discriminator via a start line 12.
  • a frequency constant oscillator 13 gives over a line 14, a pulse voltage 15 with a constant frequency and onto the second input of the gate circuit 16 designed as an AND element 16.
  • a pulse voltage 19 is thus present at the output 17 of the AND element 16 for a period 9, which corresponds to the pulse voltage 15 in this respect .
  • the line 17 is given to a pulse counter 18.
  • the circuit just described works as follows: With the measuring resistor 4 the temperature of a tap water or a heating water pipe is sensed, this measured value is switched to the oscillator 1. At the output of the oscillator there is therefore a frequency F 1 which, according to curve 6 in FIG. 2, has a certain period. This period is considerably longer than the period of the pulse voltage 15. The oscillator 13 continuously generates a pulse voltage FK 15 which is constant in frequency. The frequency of the voltage 15 is significantly greater than that of the voltage 6. As long as there is no signal on the line 11, the AND element 16 is blocked, that is to say that no counts reach the counter 18. The period discriminator 8 blocks the output until a start pulse 20 is fed to it via line 12.
  • the period discriminator opens its output 11 for the next period 9 of the pulse voltage 6. For this period there is voltage on line 11 and thus on one input of the AND element 16, so that the pulses on line 14 from the frequency-constant oscillator be allowed through.
  • the counter 18 thus counts as many pulses of the pulse voltage 15 as the period 9 is long.
  • the period discriminator 8 only allows one period 9 to pass when a start pulse is applied to the line 12. It would also be possible to give output voltage to output 11 for several periods, provided that the counting result of the count lers 18 is then divided by the number of periods.
  • the counter 18 accordingly counts the more pulses, the longer the period 9 of the pulse voltage 10 lasts.
  • the counter reading in the counter 18 is thus a direct and immediate measure of the variable, in particular the temperature, measured by the measuring resistor 4.
  • the And element 16 locks again.

Abstract

Le circuit compteur d'impulsions comprend un oscillateur (1) commandé en fréquence par une sonde, un oscillateur (13) à fréquence constante, un circuit de porte (16) et un compteur d'impulsions (18). De tels circuits compteurs d'impulsions trouvent leur application dans des mesures de flux, ici en particulier pour des mesures calorimétriques. Le but est de réaliser un circuit compteur permettant un comptage précis des impulsions pendant une période déterminée, tout en étant nettement moins cher que les dispositifs utilisés actuellement. La solution consiste en ce que la tension de sortie (5) des impulsions de l'oscillateur commandé en fréquence (1) est transmise à travers un discriminateur de période (8) au circuit de porte (16) et en ce que l'autre entrée du circuit de porte est couplée avec la sortie (14) de l'oscillateur (13) à fréquence constante.The pulse counter circuit comprises an oscillator (1) controlled in frequency by a probe, a constant frequency oscillator (13), a gate circuit (16) and a pulse counter (18). Such pulse counter circuits find their application in flow measurements, here in particular for calorimetric measurements. The aim is to provide a counter circuit allowing precise counting of the pulses during a determined period, while being considerably less expensive than the devices currently used. The solution is that the output voltage (5) of the pulses of the frequency controlled oscillator (1) is transmitted through a period discriminator (8) to the gate circuit (16) and that the other Gate circuit input is coupled to the output (14) of the constant frequency oscillator (13).

Description

Impulszählerschaltung Pulse counter circuit
Die vorliegende Erfindung bezieht sich auf eine Impulszählerschaltung gemäß dem Oberbegriff des Hauptanspruchs.The present invention relates to a pulse counter circuit according to the preamble of the main claim.
Solche Impulszählerschaltungen werden insbesondere für Durchsatzmessungen und hier bevorzugt bei Wärmemengen-Meßschaltungen verwendet. Hierbei ist es erforderlich, daß der Durchsatz innerhalb einer gewissen Zeiteinheit durch ein Rohr, insbesondere eine Vor- oder Rücklaufleitung einer Zentralheizung gemessen wird. Hierzu kann im Zuge der Rohrleitung ein Flügelmeßrad vorgesehen sein, das über eine magnetische Impulserzeugungsvorrichtung auf eine Meßleitung Impulse abgibt, wobei mithin die Anzahl der Impulse ein direktes Maß für das durchgesetzte Volumen ist. Begrenzt man die Impulsgabe durch eine gewisse Zeit, so läßt sich der Durchsatz pro Zeiteinheit ermitteln. Um hier halbwegs genaue Messungen vornehmen zu können, ist es erforderlich, die Zeit, in der die Impulszählung stattfindet, relativ groß zu halten. Andererseits ist es teuer, lange Zeiten mit elektronischen Mittel reproduziersicher zu erzeugen.Such pulse counter circuits are used in particular for throughput measurements and are preferably used here for heat quantity measuring circuits. It is necessary for the throughput to be measured within a certain time unit through a pipe, in particular a supply or return line from a central heating system. For this purpose, in the course of the pipeline, a vane measuring wheel can be provided which emits pulses to a measuring line via a magnetic pulse generating device, the number of pulses being therefore a direct measure of the volume passed through. If the impulse is limited by a certain time, the throughput per unit of time can be determined. In order to be able to make reasonably accurate measurements here, it is necessary to keep the time in which the pulse count takes place relatively long. On the other hand, it is expensive to reproducibly generate long times with electronic means.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Impulszählerschaltung anzugeben, mit der eine genaue Zählung über einen gewissen Zeitraum anfallender Impulse möglich ist, die aber erheblich billiger als der Stand der Technik aufzustellen ist. Die Lösung dieser Aufgabe gelingt mit den kennzeichnenden Merkmalen des Hauptanspruchs.The present invention is based on the object of specifying a pulse counter circuit with which an accurate counting of pulses occurring over a certain period of time is possible, but which is considerably cheaper to set up than the prior art. This problem is solved with the characterizing features of the main claim.
Weitere Ausgestaltungen und besonders vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der ünteransprüche beziehungsweise gehen aus der nachfolgenden Beschreibung hervor, die ein Ausführungbeispiel der Erfindung anhand der Figuren eins und zwei näher erläutert.Further refinements and particularly advantageous developments of the invention are the subject of the subclaims or emerge from the following description which explains an exemplary embodiment of the invention with reference to FIGS. One and two.
Es zeigenShow it
Figur eins eine Prinzipschaltung der Erfindung undFigure one shows a basic circuit of the invention and
Figur zwei Diagramme.Figure two diagrams.
In beiden Figuren bedeuten gleiche Bezugszeichen jeweils die gleichen Einzelheiten.In both figures, the same reference symbols denote the same details.
Eine Impulszählerschaltung, zum Beispiel für eine Durchsatzmessung für Zapfwasser, weist einen frequenzgesteuerten Oszilator 1 auf, an den über Leitungen 2 und 3 ein Meßwiderstand 4 mit positivem oder negativem Temperaturkoeffizienten angeschlossen ist. Dieser Meßwiderstand fühlt die Temperatur der Zapfleitung ab, sein Widerstandswert ist unmittelbar mit der Temperatur des Wassers variabel.A pulse counter circuit, for example for a throughput measurement for tap water, has a frequency-controlled oscillator 1, to which a measuring resistor 4 with a positive or negative temperature coefficient is connected via lines 2 and 3. This measuring resistor senses the temperature of the tap, its resistance value is directly variable with the temperature of the water.
Am Ausgang 5 des Oszilators 1 liegt eine Impulsspannung 6 an, die über die Leitung 7 einem Periodendiskriminator 8 zugeführt ist. Am Ausgang des Periodendiskriminators 8 liegt eine Periodendauer 9 aufweisende Impulsspannung 10, die über eine Leitung 11 mit dem einen Eingang einer Torschaltung 16 verbunden ist. über eine Startleitung 12 wird dem Periodendiskriminator ein elektrisches Startsignal zugeführt.A pulse voltage 6 is present at the output 5 of the oscillator 1 and is fed to a period discriminator 8 via the line 7. At the output of the period discriminator 8 there is a pulse duration 10 having a period duration 9, which is connected via a line 11 to the one input of a gate circuit 16. An electrical start signal is fed to the period discriminator via a start line 12.
Ein frequenzkonstanter Oszilator 13 gibt über eine Leitung 14 eine Impulsspannung 15 mit konstanter Frequenz ab und auf den zweiten Eingang der als Und-Glied 16 ausgebildeten Torschaltung 16. Am Ausgang 17 des Und-Gliedes 16 liegt somit für die Dauer einer Periode 9 eine Impulsspannung 19 an, die insoweit der Impulsspannung 15 entspricht. Die Leitung 17 ist auf einen Impulszähler 18 gegeben.A frequency constant oscillator 13 gives over a line 14, a pulse voltage 15 with a constant frequency and onto the second input of the gate circuit 16 designed as an AND element 16. A pulse voltage 19 is thus present at the output 17 of the AND element 16 for a period 9, which corresponds to the pulse voltage 15 in this respect . The line 17 is given to a pulse counter 18.
Die eben geschilderte Schaltung arbeitet wie folgt: Mit dem Meßwiderstand 4 wird die Temperatur einer Zapfwasserleitung oder einer Heizwasserleitung abgefühlt, dieser Meßwert ist auf den Oszilator 1 geschaltet. Am Ausgang des Oszilators liegt somit eine Frequenz F 1 an, die gemäß der Kurve 6 in Figur zwei eine bestimmte Periodendauer aufweist. Diese Periodendauer ist erheblich größer als die Periodendauer der Impulsspannung 15. Der Oszilator 13 erzeugt fortlaufend eine Impulsspannung FK 15, die in ihrer Frequenz konstant ist. Die Frequenz der Spannung 15 Ist wesentlicher größer als die der Spannung 6. Solange auf der Leitung 11 kein Signal anliegt, ist das Und-Glied 16 gesperrt, das heißt in den Zähler 18 gelangen keine Zählimpulse. Der Periodendiskriminator 8. sperrt so lange den Ausgang, bis ihm über die Leitung 12 ein Startimpuls 20 zugeführt wird. Geschieht dies, so öffnet der Periodendiskriminator seinen Ausgang 11 für die nächste Periode 9 der ImpulsSpannung 6. Für diesen Zeitraum steht auf der Leitung 11 und damit auf dem einen Eingang des Und Gliedes 16 Spannung, so daß die Impulse auf der Leitung 14 vom frequenzkonstanten Oszilator durchgelassen werden. Der Zähler 18 zählt somit soviel Impulse der ImpulsSpannung 15, als die Periode 9 lang ist.The circuit just described works as follows: With the measuring resistor 4 the temperature of a tap water or a heating water pipe is sensed, this measured value is switched to the oscillator 1. At the output of the oscillator there is therefore a frequency F 1 which, according to curve 6 in FIG. 2, has a certain period. This period is considerably longer than the period of the pulse voltage 15. The oscillator 13 continuously generates a pulse voltage FK 15 which is constant in frequency. The frequency of the voltage 15 is significantly greater than that of the voltage 6. As long as there is no signal on the line 11, the AND element 16 is blocked, that is to say that no counts reach the counter 18. The period discriminator 8 blocks the output until a start pulse 20 is fed to it via line 12. If this happens, the period discriminator opens its output 11 for the next period 9 of the pulse voltage 6. For this period there is voltage on line 11 and thus on one input of the AND element 16, so that the pulses on line 14 from the frequency-constant oscillator be allowed through. The counter 18 thus counts as many pulses of the pulse voltage 15 as the period 9 is long.
Im Ausführungsbeispiel ist vorgesehen, daß der Periodendiskrirainator 8 bei Anlegen eines Startimpulses auf der Leitung 12 nur eine Periode 9 durchläßt. Es wäre genauso möglich, auf den Ausgang 11 für mehrere Perioden Ausgangsspannung zu geben unter der Voraussetzung, daß das Zählergebnis des Zäh lers 18 dann durch die Periodenzahl dividiert wird.In the exemplary embodiment it is provided that the period discriminator 8 only allows one period 9 to pass when a start pulse is applied to the line 12. It would also be possible to give output voltage to output 11 for several periods, provided that the counting result of the count lers 18 is then divided by the number of periods.
Der Zähler 18 zählt demgemäß um so mehr Impulse, je länger die Periode 9 der Impulsspannung 10 dauert. Somit ist der Zählerstand im Zähler 18 ein direktes und unmittelbares Maß für die vom Meßwiderstand 4 gemessene Größe, insbesondere Temperatur.The counter 18 accordingly counts the more pulses, the longer the period 9 of the pulse voltage 10 lasts. The counter reading in the counter 18 is thus a direct and immediate measure of the variable, in particular the temperature, measured by the measuring resistor 4.
Nach Ablauf der Periode der Impulsspannung 10 sperrt das Und Glied 16 wieder. After the period of the pulse voltage 10 has elapsed, the And element 16 locks again.

Claims

AnsprücheExpectations
Impulszählerschaltung mit einem von einem Meßfühler in seiner Frequenz gesteuerten Oszilator und einem frequenzkonstanten Oszilator sowie einer Torschaltung und einem Impulszähler, dadurch gekennzeichnet, daß der Impulsspannungsausgang (5) des frequenzgesteuerten Oszilators (1) über einen Periodendiskriminator (8) auf die Torschaltung (16) geschaltet und daß der andere Eingang der Torschaltung mit dem Ausgang (14) des frequenzkonstanten Oszilators (13) gekoppelt ist.Pulse counter circuit with an oscillator controlled in frequency by a sensor and a frequency-constant oscillator as well as a gate circuit and a pulse counter, characterized in that the pulse voltage output (5) of the frequency-controlled oscillator (1) is connected to the gate circuit (16) via a period discriminator (8) and that the other input of the gate circuit is coupled to the output (14) of the frequency-constant oscillator (13).
Impulszählerschaltung nach Anspruch eins, dadurch gekennzeichnet, daß die Torschaltung als Und-Glied (16) ausgebildet ist.Pulse counter circuit according to claim one, characterized in that the gate circuit is designed as an AND element (16).
Impulszählerschaltung nach Anspruch eins oder zwei, dadurch gekennzeichnet, daß der Periodendiskriminator (8) über einen Startimpuls (20) auf einer Startleitung (12) in Betrieb gesetzt ist und daß die Torschaltung (16) für eine Periode nach dem Startimpuls (20) freigegeben wird.Pulse counter circuit according to claim one or two, characterized in that the period discriminator (8) is put into operation via a start pulse (20) on a start line (12) and that the gate circuit (16) is released for a period after the start pulse (20) .
Impulszählerschaltung nach Anspruch drei, dadurch gekennzeichnet, daß die Torschaltung für einen bestimmten Bruchteil oder ein bestimmtes Vielfaches einer Periode freigegeben wird und daß das Ergebnis des Impulszählers (18) mit einem entsprechenden Multiplikator oder Divisor korrigiert ist. Pulse counter circuit according to claim three, characterized in that the gate circuit is released for a certain fraction or a certain multiple of a period and that the result of the pulse counter (18) is corrected with a corresponding multiplier or divisor.
EP19830900488 1982-02-24 1983-02-05 Pulse counter circuit Withdrawn EP0101447A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8205568U 1982-02-24
DE8205568 1982-02-24

Publications (1)

Publication Number Publication Date
EP0101447A1 true EP0101447A1 (en) 1984-02-29

Family

ID=6737543

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830900488 Withdrawn EP0101447A1 (en) 1982-02-24 1983-02-05 Pulse counter circuit

Country Status (4)

Country Link
EP (1) EP0101447A1 (en)
DK (1) DK443483A (en)
IT (1) IT8320885V0 (en)
WO (1) WO1983003002A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3269549D1 (en) * 1981-04-02 1986-04-10 Atomic Energy Authority Uk Improvements in or relating to the production of chemical compounds

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH579772A5 (en) * 1974-05-30 1976-09-15 Aquametro Ag
YU63276A (en) * 1975-03-13 1982-06-30 Hans Peter Jernss Device for measuring the uantity of heat consumed at heat consumption
DE2905882A1 (en) * 1979-02-16 1980-08-28 Diehl Gmbh & Co METHOD AND CIRCUIT FOR THE DIGITAL DETECTION OF A TEMPERATURE

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8303002A1 *

Also Published As

Publication number Publication date
DK443483D0 (en) 1983-09-28
DK443483A (en) 1983-09-28
WO1983003002A1 (en) 1983-09-01
IT8320885V0 (en) 1983-02-22

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