DE3308705A1 - Method for measuring the stroke length of piston pumps - Google Patents

Method for measuring the stroke length of piston pumps

Info

Publication number
DE3308705A1
DE3308705A1 DE19833308705 DE3308705A DE3308705A1 DE 3308705 A1 DE3308705 A1 DE 3308705A1 DE 19833308705 DE19833308705 DE 19833308705 DE 3308705 A DE3308705 A DE 3308705A DE 3308705 A1 DE3308705 A1 DE 3308705A1
Authority
DE
Germany
Prior art keywords
stroke length
pulse generator
piston
piston pumps
measuring
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Withdrawn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
DE19833308705
Other languages
German (de)
Inventor
Bernd Dipl.-Ing. 3560 Salzwedel Neumann
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.)
Pumpen und Verdichter VEB
Original Assignee
Pumpen und Verdichter VEB
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 Pumpen und Verdichter VEB filed Critical Pumpen und Verdichter VEB
Publication of DE3308705A1 publication Critical patent/DE3308705A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/24404—Interpolation using high frequency signals
    • 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
    • F04B51/00—Testing machines, pumps, or pumping installations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • 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
    • F04B2201/0206—Length of piston stroke

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Description

« et · «Et ·

Verfahren zur Erfassung der Hublänge von Kolbenpumpen. Die Erfindung betrifft ein Verfahren, die Hublänge von Kolbenpumpen, insbesondere Dosierpumpen, mit oszillierendem Verdränger zu erfassen und anzuzeigen.Method for determining the stroke length of piston pumps. The invention relates to a method, the stroke length of To detect and display piston pumps, in particular metering pumps, with an oscillating displacer.

Bei der Regelung durch Hublängenänderung wird von außen manuell oder durch elektrische oder pneumatische Stellmotor e ein genau definierter Hub an der Pumpe eingestellt. Die Hublängenänderung erfolgt durch Veränderung der Exzentrizität bei kurbeltriebähnlichen Verstellgetrieben (DD-PS 93 299) oder der Veränderung der Längen der Übertragungsglieder zueinander bei vielgliedrigen Gelenkgetrieben. Die Hublängenveränderung ist dabei von UuIl bis Maximalhub bei Stillstand oder während des Betriebes möglich. Auf Grund des Konstruktionsprinzips ist die Kolbenhublänge die vorherrschende Stellgröße für den Volumendurchsatz von Dosierkolbenpumpen. Gegen das Überfahren des Maximal- und Minimalhubes ist die Pumpe durch Endlagensehalte* gesichert. Der erreichbare Grundfehler der elektrisch-analog arbeitenden Geräte beträgt 1,5 %· When regulating by changing the stroke length, a precisely defined stroke is set on the pump externally, either manually or by means of an electric or pneumatic servomotor. The stroke length is changed by changing the eccentricity of crank drive-like adjustment gears (DD-PS 93 299) or changing the lengths of the transmission links to one another in multi-link articulated gears. The stroke length can be changed from UuIl to the maximum stroke at standstill or during operation. Due to the design principle, the piston stroke length is the predominant control variable for the volume throughput of metering piston pumps. The pump is secured against overrunning the maximum and minimum stroke by means of end-of-travel stops *. The achievable basic error of the electrical-analog working devices is 1.5 %

Das Ziel der Erfindung ist es, Umsetzfehler der bekannten Verfahren auszuschließen.The aim of the invention is to rule out conversion errors in the known methods.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur direkten Messung der Hublänge von Kolbenpumpen zu entwickeln, wobei die positive und negative Bewegungsrichtung des Kolbens ermittelt werden soll.The invention is based on the object of developing a method for the direct measurement of the stroke length of piston pumps, whereby the positive and negative direction of movement of the piston is to be determined.

Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß die Bewegung des Kolbens direkt mittels Impulsgeber erfaßt wird. Ein weiteres Erfindungsmerkmal besteht darin, daß die vom Impulsgeber gelieferten Impulse bestimmten Längeneinheiten zugeordnet sind.According to the invention, the object is achieved in that the movement of the piston is detected directly by means of a pulse generator. Another feature of the invention is that the pulses supplied by the pulse generator have certain length units assigned.

Ein anderes Merkmal ist dadurch gegeben, daß die Impulse elektronisch gezählt und als Hublängenwerte zur Anzeige kommen. Schließlich besteht ein Kennzeichen der Erfindung darin, daß der Impulsgeber zwei Impulsfolgen zur Bewegungsriehtungserkennung abgibt.Another feature is that the pulses are counted electronically and displayed as stroke length values come. Finally, a characteristic of the invention is that the pulse generator has two pulse trains for detecting the direction of movement gives away.

Die Erfindung wird an einem Ausfülirungsbeispiel näher erläutert.The invention is explained in more detail using an exemplary embodiment explained.

In der zugehörigen Zeichnung a ei gen Fig. 1: Blockachaltbild des Verfahrens Fig· 2% FunktionsdiagrammIn the associated drawing a separate FIG. 1: Block diagram of the method FIG. 2% functional diagram

Mittels Impulsgeber 1 wird die Bewegung χ des Kolbens erfaßt. Durch konstruktive Gestaltung wird erreicht, daß ein Impuls dem Verschiebeweg von 0,1 mm entspricht. Der Impulsgeber 1 liefert zwei phasenverschobene Impulsfolgen x^ und χ«, die mittels Richtungserkennungsschaltung 2 das Hubzahlsignal Xo liefert. Dieses Signal wird als Ausgangssignal bereitgestellt. Gleichzeitig wird durch den monostabilen Multivibrator 6 das Übernahmesignal x* zum Einschreiben des Inhalts des Zählers 3 in den Speicher 4 ausgelöst. Der Speicherinhalt wird mit der Anzeige 5 dargestellt.The movement χ of the piston is recorded by means of pulse generator 1. The structural design ensures that one impulse corresponds to a displacement of 0.1 mm. The pulse generator 1 delivers two phase-shifted pulse trains x ^ and χ «, which by means of the direction detection circuit 2, the number of strokes signal Xo delivers. This signal is provided as an output signal. At the same time, through the monostable Multivibrator 6 the transfer signal x * for writing the Contents of the counter 3 in the memory 4 triggered. The memory content is shown on display 5.

Vom Übernahmesignal x. wird durch den monostabilen Multivibrator 7- das Hullsetzungssignal Xr gebildet· Dieses Signal bewirkt die Kulisetzung des Zählers 3. Die Impulsfolge x^ wird bis zum nächsten Bewegungsrichtungswechsel in den Zähler 3 eingezählt. Bei Richtungswechsel erfolgt dann die Übernahme des Zählerinhaltes in den Speicher 4 und gelangt damit zur Anzeige 5· Anschließend wird der Zähler 3 lull gesetzt und die Erfassung der anderen Bewegung erfolgt, lach jeder Bewegungsrichtungsänderung erfolgt die Anzeige 5 des zurückgelegten Kolbenweges mit der Genauigkeit von 0,1 mm# Die Vorteile der Erfindung bestehen darin, daß durch Auswertung der vom Impulsgeber gelieferten Impulsfolgen die positive und negative Bewegungsrichtung des Kolbens ermittelt und als statisches Signal zur weiteren Verarbeitung bereitgestellt wird.From the takeover signal x. The setting signal Xr is formed by the monostable multivibrator 7- · This signal causes the counter 3 to be set. The pulse sequence x ^ is counted into the counter 3 until the next change in direction of movement. When the direction changes, the contents of the counter are transferred to memory 4 and are then displayed. 1 mm # The advantages of the invention are that by evaluating the pulse sequences supplied by the pulse generator, the positive and negative direction of movement of the piston is determined and made available as a static signal for further processing.

Diese Signale werden gleichzeitig zur Hubzahlauswertung genutzt.These signals are used at the same time to evaluate the number of strokes.

Eine der Impulsfolgen wird zur digitalen Anzeige des Hublängenwertes eingezahlt. Durch konstruktive Gestaltung werden die Impulse einer bestimmten Längeneinheit zugeordnet, so daß direkt Hublängenwerte zur Anzeige kommen.One of the pulse trains is paid in for the digital display of the stroke length value. Through constructive design the pulses are assigned to a specific length unit so that stroke length values are displayed directly.

LeerseiteBlank page

Claims (3)

» » β Ο β «φ «»» Β Ο β «φ« Patentansprüche: .:..:. \.·\.* *..*·..·Claims:.: ..:. \. · \. * * .. * · .. · 1· Verfahren, die Hublänge von Kolbenpumpen, insbesondere Dosierpumpen, mit oszillierendem Verdränger zu erfassen und anzuzeigen, gekennzeichnet dadurch, daß die Bewegung des Kolbens direkt mittels Impulsgeber erfaßt wird.1 · Method of determining the stroke length of piston pumps, especially metering pumps, with oscillating displacers and display, characterized in that the movement of the piston is detected directly by means of a pulse generator. 2. Verfahren nach Anspruch 1, gekennzeichnet dadurch, daß die vom Impulsgeber gelieferten Impulse bestimmten Längeneinheiten zugeordnet sind.2. The method according to claim 1, characterized in that the pulses supplied by the pulse generator are determined Units of length are assigned. 3. Verfahren nach Anspruch 1, gekennzeichnet dadurch, daß die Impulse elektronisch gezählt und als Hublängenwerte zur Anzeige kommen.3. The method according to claim 1, characterized in that the pulses are counted electronically and as stroke length values come to the display. 4· Verfahren nach Anspruch 1, gekennzeichnet dadurch, daß der Impulsgeber zwei Impulsfolgen zur Bewegungsrichtungserkennung abgibt.4. Method according to Claim 1, characterized in that the pulse generator has two pulse trains for detecting the direction of movement gives away. - Hierzu 1 Seite Zeichnung -- For this 1 page of drawing -
DE19833308705 1982-05-28 1983-03-11 Method for measuring the stroke length of piston pumps Withdrawn DE3308705A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD24028882 1982-05-28

Publications (1)

Publication Number Publication Date
DE3308705A1 true DE3308705A1 (en) 1983-12-01

Family

ID=5538913

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19833308705 Withdrawn DE3308705A1 (en) 1982-05-28 1983-03-11 Method for measuring the stroke length of piston pumps

Country Status (2)

Country Link
DE (1) DE3308705A1 (en)
FR (1) FR2527697A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3505133A1 (en) * 1985-02-14 1986-08-14 Lewa Herbert Ott Gmbh + Co, 7250 Leonberg HYDRAULICALLY ACTUATED LIFT ADJUSTMENT
DE3546189A1 (en) * 1985-12-27 1987-07-02 Ott Kg Lewa METHOD AND DEVICE FOR MEASURING FLOW IN OSCILLATING DISPLACEMENT PUMPS
DE4228308A1 (en) * 1992-08-26 1994-03-03 Rexroth Mannesmann Gmbh Double-cylinder hydraulic drive control system e.g. for machine tool - compensates change in volume of pressure spaces of cylinder by piezoelectrically-actuated pistons located at ends of cylinder, with piezoelectric actuators closed off from pressure spaces

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3505133A1 (en) * 1985-02-14 1986-08-14 Lewa Herbert Ott Gmbh + Co, 7250 Leonberg HYDRAULICALLY ACTUATED LIFT ADJUSTMENT
DE3546189A1 (en) * 1985-12-27 1987-07-02 Ott Kg Lewa METHOD AND DEVICE FOR MEASURING FLOW IN OSCILLATING DISPLACEMENT PUMPS
DE4228308A1 (en) * 1992-08-26 1994-03-03 Rexroth Mannesmann Gmbh Double-cylinder hydraulic drive control system e.g. for machine tool - compensates change in volume of pressure spaces of cylinder by piezoelectrically-actuated pistons located at ends of cylinder, with piezoelectric actuators closed off from pressure spaces

Also Published As

Publication number Publication date
FR2527697A1 (en) 1983-12-02

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Legal Events

Date Code Title Description
8181 Inventor (new situation)

Free format text: NEUMANN, BERND, DIPL.-ING., 3560 SALZWEDEL, DD

8130 Withdrawal