DE3308704A1 - Method for measuring the stroke frequency of piston pumps - Google Patents
Method for measuring the stroke frequency of piston pumpsInfo
- Publication number
- DE3308704A1 DE3308704A1 DE19833308704 DE3308704A DE3308704A1 DE 3308704 A1 DE3308704 A1 DE 3308704A1 DE 19833308704 DE19833308704 DE 19833308704 DE 3308704 A DE3308704 A DE 3308704A DE 3308704 A1 DE3308704 A1 DE 3308704A1
- Authority
- DE
- Germany
- Prior art keywords
- stroke frequency
- frequency
- measuring
- piston pumps
- stroke
- 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- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2201/00—Pump parameters
- F04B2201/02—Piston parameters
- F04B2201/0207—Number of pumping strokes in unit time
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
Description
Verfahren zur Erfassung der Hubfrequenz von KolbenpumpenMethod for recording the stroke frequency of piston pumps
Die Erfindung betrifft ein Verfahren zur Erfassung der Hubfrequenz von Kolbenpumpen, insbesondere von Dosierpumpen.The invention relates to a method for detecting the stroke frequency of piston pumps, in particular of metering pumps.
Die Kolbenhubfrequenz ist eine Stellgröße für den Volumendurchsatz von Dosierpumpen, deren Definition die Kolbenhubzahl pro Zeiteinheit ist.The piston stroke frequency is a manipulated variable for the volume throughput of metering pumps, the definition of which is the number of piston strokes per unit of time.
Die Kolbenhubfrequenz ergibt sich aus der mittels Schneckenantrieb untersetzten Antriebsdrehzahl. Durch Variation der Antriebsdrehzahl wird die Kolbenhubfrequenz verändert.The piston stroke frequency results from the worm drive reduced drive speed. The piston stroke frequency is changed by varying the drive speed.
Als drehzahlvariable Antriebe sind für die Dosierpumpen Gleichstrommotore, Regelgetriebe mit Drehstrommotor und PIV Getriebe mit Drehstrommotor vorgesehen. Die Messung der Kolbenhubfrequenz erfolgt mit Wirbelstromtachometer, Synchrontaohometer sov/ie Präzisions-Tachogeneratoren. Zur Anzeige werden mechanisch- oder elektrisch-analoge Einrichtungen eingesetzt. Die Basis der bekannten Verfahren zur Hubfrequenzmessung ist somit die Antriebsdrehzahlmessung.As variable-speed drives are for the metering pumps DC motors, variable speed gearboxes with three-phase motors and PIV gearboxes provided with three-phase motor. The piston stroke frequency is measured with an eddy current tachometer, synchronous tachometer so / ie precision tacho generators. See full ad mechanical or electrical analog devices are used. The basis of the known procedures for stroke frequency measurement is therefore the drive speed measurement.
Das Ziel der Erfindung besteht darin, die Genauigkeit der Erfassung der Kolbenhubfrequenz zu erhöhen.The aim of the invention is to increase the accuracy of the detection of the piston stroke frequency.
Der Erfindung liegt die Aufgabe zugrunde,·ein Verfahren zur Erfassung der Hubfrequenz von Kolbenpumpen ohne Antriebsdrehzahlmessung zu entwickeln.The invention is based on the object · a method for To develop the acquisition of the stroke frequency of piston pumps without measuring the drive speed.
Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß durch Messung der zeitlichen Aufeinanderfolge der Hubzahlimpulse und anschließende Berechnung mittels integriertem Rechnerschaltkreis die Hubfrequenz ermittelt wird. Ein weiteres Kennzeichen der Erfindung besteht darin, daß vorwählbare konstante zur formierung des Anzeigewertbereiches in die Berechnung eingezogen werden.According to the invention the object is achieved in that by Measurement of the chronological sequence of the stroke rate pulses and subsequent calculation using an integrated computer circuit the stroke frequency is determined. Another feature of the invention is that preselectable constant to form the display value range in the Calculation will be collected.
Schließlich zeichnet sich die Erfindung auch dadurch aus, daß durch Variation der Vergleichsfrequenz eine Normierung des Anzeigewertbereiches erreicht wird.Finally, the invention is also characterized in that normalization is achieved by varying the comparison frequency of the display value range is reached.
Das erfindungsgemäße Verfahren soll an Ausführungsbeispielen
näher erläutert werden.
In den zugehörigen Zeichnungen zeigenThe method according to the invention will be explained in more detail using exemplary embodiments.
Show in the accompanying drawings
Pig« 1: Blockschaltbild des Meßverfahrens mit Variation der VergleichsfrequenzPig «1: Block diagram of the measuring process with variation of the Comparison frequency
• ·• ·
• · · 4• · · 4
Fig. 2: FunktionsdiagrammFig. 2: Function diagram
Fig. 3: Blockschaltbild des Meßverfahrens mit Konstanteneinrechnung Fig. 3: Block diagram of the measuring method with constants taken into account
Fig. 4: FunktionsdiagrammFig. 4: Function diagram
Das Verfahren mit Variation der Vergleichsfrequenz zur Normierung der Hubfrequenz arbeitet wie folgt (Fig. 1): Die Hubzahlimpulse χ werden in der Eingangsschaltung 1 in kurze Impulse x* umgewandelt und dienen als Eingangssignale der Torschaltung 2 sowie der Ablaufsteuerung 10.The method with variation of the comparison frequency to normalize the stroke frequency works as follows (Fig. 1): The number of strokes pulses χ are converted into short pulses x * in the input circuit 1 and serve as input signals the gate circuit 2 and the sequence control 10.
Die Torschaltung 2 gibt die Vergleichsfrequenzimpulsfolge des Frequenzgenerators 3» der über eine Programmiereinrichtung
4 iii seinem Frequenzwert eingestellt werden kann,
als Signal x* an den Zähler 5·
Mit jedem Hubzahlimpuls χ wird durch das Signal X2 der
Zählerinhalt χς in den Speicher 6 übernommen und der
Zähler 5 durch den HullSitzungsimpuls x, für die nächste
Messung aktiviert.The gate circuit 2 gives the comparison frequency pulse sequence of the frequency generator 3 »whose frequency value can be set via a programming device 4 iii, as a signal x * to the counter 5 ·
With each stroke rate pulse χ, the counter content χ ς is transferred to the memory 6 by the signal X 2 and the counter 5 is activated for the next measurement by the Hull session pulse x.
Der Speicherinhalt wird während der Abarbeitung der Rechneroperation Xg in den Rechner 7 übernommen. Das Rechnerergebnis wird durch das Signal Xg zur Anzeige 9 gebracht. Folgende Rechenoperationen werden abgearbeitet: Xg^ : löschen des Arbeitsspeichers des Rechenschaltkreises Xg2 : Einlesen der Zahl -1-Xgo ί Einlesen der Rechenoperation -Division-Xg/ i Einlesen des Speicherinhaltes des Speichers 6 Xgc ϊ Durchführung der Rechenoperation durch Ergebnisabforderung. The memory content is transferred to the computer 7 while the computer operation Xg is being processed. The result of the calculation is shown on the display 9 by the signal Xg. The following arithmetic operations are processed: Xg ^: delete the working memory of the arithmetic circuit Xg 2 : read in the number -1-Xgo ί read in the arithmetic operation -Division-Xg / i read in the memory content of memory 6 Xgc ϊ carry out the arithmetic operation by requesting results.
Zur Anzeige werden dann normierte Hubfrequenzwerte gebracht, die während jedem Kolbenhubes gemessen wurden.Normalized stroke frequency values are then displayed for display, which were measured during each piston stroke.
Das in Fig· 3 dargestellte Verfahren arbeitet mit der Ein-. lesung von Berechnungskonstante x™ vom Vorwahlspeieher 8 und fester Vergleichsfrequenz. Die Verfahren unterscheiden sich in der Abarbeitung der Rechneroperationen.The method shown in FIG. 3 works with the input. Reading of the calculation constant x ™ from the preset memory 8 and fixed comparison frequency. The procedures differ in the processing of the computer operations.
Claims (3)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD24029182 | 1982-05-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3308704A1 true DE3308704A1 (en) | 1983-12-01 |
Family
ID=5538916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19833308704 Withdrawn DE3308704A1 (en) | 1982-05-28 | 1983-03-11 | Method for measuring the stroke frequency of piston pumps |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE3308704A1 (en) |
| FR (1) | FR2527699A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4795314A (en) * | 1987-08-24 | 1989-01-03 | Cobe Laboratories, Inc. | Condition responsive pump control utilizing integrated, commanded, and sensed flowrate signals |
| DE19525557A1 (en) * | 1995-07-13 | 1997-01-16 | Knf Flodos Ag | Dosing pump |
-
1983
- 1983-03-11 DE DE19833308704 patent/DE3308704A1/en not_active Withdrawn
- 1983-04-27 FR FR8306959A patent/FR2527699A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| FR2527699A1 (en) | 1983-12-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8139 | Disposal/non-payment of the annual fee |