FR2527697A1 - METHOD FOR DETERMINING THE LENGTH OF A PISTON PUMP - Google Patents

METHOD FOR DETERMINING THE LENGTH OF A PISTON PUMP Download PDF

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Publication number
FR2527697A1
FR2527697A1 FR8306957A FR8306957A FR2527697A1 FR 2527697 A1 FR2527697 A1 FR 2527697A1 FR 8306957 A FR8306957 A FR 8306957A FR 8306957 A FR8306957 A FR 8306957A FR 2527697 A1 FR2527697 A1 FR 2527697A1
Authority
FR
France
Prior art keywords
piston
stroke length
pumps
length
pulse
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Withdrawn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
FR8306957A
Other languages
French (fr)
Inventor
Bernd 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 & Verdichter Veb K
Original Assignee
Pumpen & Verdichter Veb K
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 & Verdichter Veb K filed Critical Pumpen & Verdichter Veb K
Publication of FR2527697A1 publication Critical patent/FR2527697A1/en
Withdrawn legal-status Critical Current

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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)

Abstract

The invention relates to a method for measuring and displaying the stroke length of piston pumps, in particular controlled-volume pumps, having an oscillating impeller. The aim of the invention is to exclude the conversion errors of the known methods. It is the object of the invention to develop a method for direct measurement of the stroke length of piston pumps, the aim being to determine the positive and negative directions of movement of the piston. The object is achieved when the movement of the piston is directly measured by means of a pulse generator.

Description

L'invention a pour objet un procédé pour déterminer et pour indiquer la longueur de course de pompes à piston, en particulier de pompes de dosage, à déplaceur oscillant. The invention relates to a method for determining and indicating the stroke length of piston pumps, in particular dosing pumps, with oscillating displacer.

Dans le procédé de réglage par modification de la longueur de course, on règle de l'extérieur sur la pompe une course définie de façon précise, soit à la main, soit à l'aide de servo-moteurs électriques ou pneumatiques. On effectue la modification de la longueur de course en modifiant l'excentrai cité lorsqu'il s'agit de mécanismes ajustables du genre commandes à manivelle, (brevet de la RDA 93 299), soit en modifi ant les longueurs réciproques des éléments de transmission lorsqu'il s'agit de mécanismes articulés à plusieurs sections. In the adjustment process by modifying the stroke length, a precisely defined stroke is adjusted from the outside, either by hand or using electric or pneumatic servomotors. The stroke length is modified by modifying the eccentric cited in the case of adjustable mechanisms of the crank control type (RDA patent 93,299), or by modifying the reciprocal lengths of the transmission elements in the case of mechanisms articulated with several sections.

La modification de la longueur de course est possible de zéro jusqu'à la course maximale, à l'arrêt ou en cours de fonctionnement. En raison du principe de construction, la longueur de course du piston est la variable réglante prédominante pour le débit volumétrique des pompes de dosage à piston. Des commutateurs de fin de course mettent la pompe à l'abri du risque de dépassement de la course maximale et de la course minimale. Pour les appareils à fonctionnement électrique-analogique, l'erreur intrinsèque pouvant être atteinte est de 1,5%.The stroke length can be changed from zero up 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 volumetric flow rate of piston dosing pumps. Limit switches protect the pump from the risk of exceeding the maximum and minimum travel. For devices with electrical-analog operation, the intrinsic error that can be reached is 1.5%.

C'est un but de l'invention de faire disparaître les erreurs de conversion des procédés connus. It is an object of the invention to eliminate the conversion errors of the known methods.

Le problème à résoudre par l'invention consiste à créer un procédé pour la mesure directe de la longueur de course de pompes à piston avec lequel soit déterminé le sens de déplacement positif ou négatif du piston. The problem to be solved by the invention consists in creating a method for the direct measurement of the stroke length of piston pumps with which the direction of positive or negative displacement of the piston is determined.

Ce résultat est obtenu par l'invention grâce au fait que le déplacement du piston est enregistré directement au moyen d'émetteurs d'impulsions. This result is obtained by the invention thanks to the fact that the displacement of the piston is recorded directly by means of pulse emitters.

Selon un autre point remarquable de l'invention, les impulsions émises par l'émetteur d'impulsions sont associées à des unités de longueur déterminées. According to another remarkable point of the invention, the pulses emitted by the pulse emitter are associated with determined length units.

Selon un autre point remarquable de l'invention, les impulsions sont comptées électroniquement et sont affichées en tant que valeurs de longueur de course. According to another remarkable point of the invention, the pulses are counted electronically and are displayed as stroke length values.

Enfin, une caractéristique de l'invention consiste en ce que l'émetteur d'impulsions émet deux trains d'impulsions pour déterminer le sens du mouvement du piston. Finally, a characteristic of the invention consists in that the pulse emitter emits two trains of pulses to determine the direction of movement of the piston.

Les caractéristiques et avantages de l'invention ressortiront d'ailleurs de la description qui va suivre, à titre d'exemple, en référence au dessin annexé dans lequel
- La figure 1 est schéma-bloc fonctionnel du procédé
- La figure 2 est un diagramme fonctionnel.The characteristics and advantages of the invention will become apparent from the description which follows, by way of example, with reference to the attached drawing in which
- Figure 1 is a functional block diagram of the process
- Figure 2 is a functional diagram.

Le déplacement x du piston est enregistré au moyen de l'émetteur d'impulsions 1. Par des dispositions constructives on obtient qu'une impulsion corresponde au parcours de déplacement de 0,lmm. L'émetteur d'impulsions 1 émet deux trains d'impulsions x1 et x2 déphasés qui, au moyen d'un dispositif de détermination de direction 2, fournissent le signal numérotique de course x3. Ce signal est mis en attente comme signal de sortie. En même temps, est déclenché par le multivibrateur monostable 6 le signal de transfert x4 pour inscrire le contenu du compteur 3 dans la mémoire 4. Le contenu de la mémoire est affiché par l'élément d'affichage 5. The displacement x of the piston is recorded by means of the pulse emitter 1. By constructive arrangements it is obtained that a pulse corresponds to the displacement path of 0.1 mm. The pulse transmitter 1 transmits two phase shifted pulse trains x1 and x2 which, by means of a direction determining device 2, provide the digital stroke signal x3. This signal is put on hold as an output signal. At the same time, the transfer signal x4 is triggered by the monostable multivibrator 6 to write the content of the counter 3 in the memory 4. The content of the memory is displayed by the display element 5.

A partir du signal de transfert x4 le multivibrateur monostable 7 forme le signal de remise à zéro x5. Ce signal provoque la remise à zéro du compteur 3. From the transfer signal x4 the monostable multivibrator 7 forms the reset signal x5. This signal causes counter 3 to reset.

Le train d'impulsions x1 est mis en comptage dans le compteur 3 jusqu'au changement de sens de mouvement suivant
Lors du changement de sens de mouvement, le contenu du compteur est introduit dans la mémoire 4 et arrive ainsi à l'affichage 5. Puis le compteur 3 est remis à zéro et la course de déplacement suivante est enregistrée. Après chaque changement de sens de mouvement du piston, s'effectue l'affichage 5 du parcours effectué par le piston au dixième de millimètre près.Pulse train x1 is counted in counter 3 until the next change in direction of movement
When changing the direction of movement, the content of the counter is entered into memory 4 and thus arrives at display 5. Then counter 3 is reset to zero and the next movement stroke is recorded. After each change of direction of movement of the piston, the display 5 of the path taken by the piston is made to the nearest tenth of a millimeter.

Les avantages de l'invention résident dans le fait qu' en traitant les trains d'impulsions émis par l'émetteur d'impulsions, on détermine le sens positif ou négatif de la course du piston et le signal est mis en attente en tant que signal statique pour un traitement ultérieur. The advantages of the invention reside in the fact that by processing the pulse trains emitted by the pulse emitter, the positive or negative direction of the piston stroke is determined and the signal is put on hold as static signal for further processing.

Ces signaux sont utilisés en même temps pour l'exploi- tation des données numériques de course.  These signals are used at the same time for the processing of digital race data.

L'un des deux trains d'impulsions est décompté pour l'affichage numérique de la valeur de longueur de course. One of the two pulse trains is counted down for the digital display of the stroke length value.

Grâce à des mesures de construction, les impulsions sont asso ciées à une unité de longueur déterminée de sorte que sont affichées directement des longueurs de course. By means of construction measures, the pulses are associated with a unit of determined length so that stroke lengths are displayed directly.

Claims (4)

REVENDICATIONS 1. Procédé pour la détermination et l'affichage de la longueur de course de pompes à piston, en particulier pompes de dosage, à déplaceur oscillant, caractérisé en ce que le déplacement du piston est enregistré directement au moyen d'un émetteur d'impulsions. 1. Method for determining and displaying the stroke length of piston pumps, in particular dosing pumps, with oscillating displacer, characterized in that the displacement of the piston is recorded directly by means of a pulse transmitter . 2. Procédé selon la revendication 1, caractérisé en ce les impulsions émises par l'émetteur d'impulsions sont associées à des unités de longueur déterminées. 2. Method according to claim 1, characterized in that the pulses emitted by the pulse transmitter are associated with determined length units. 3. Procédé selon la revendication 1, caractérisé en ce que les impulsions sont comptées électroniquement et viennent à l'affichage en tant que valeurs de longueur de course. 3. Method according to claim 1, characterized in that the pulses are counted electronically and come to the display as stroke length values. 4. Procédé selon la revendication 1, caractérisé en ce que l'émetteur d'impulsions émet deux trains d'impulsions déphasés.  4. Method according to claim 1, characterized in that the pulse transmitter transmits two phase shifted pulse trains.
FR8306957A 1982-05-28 1983-04-27 METHOD FOR DETERMINING THE LENGTH OF A PISTON PUMP Withdrawn FR2527697A1 (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
FR2527697A1 true FR2527697A1 (en) 1983-12-02

Family

ID=5538913

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8306957A Withdrawn FR2527697A1 (en) 1982-05-28 1983-04-27 METHOD FOR DETERMINING THE LENGTH OF A PISTON PUMP

Country Status (2)

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

Families Citing this family (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

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Publication number Publication date
DE3308705A1 (en) 1983-12-01

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