DE2852694A1 - Weight measurement for automatic liq. filling process - by electronic comparison of measured and stored total weights derived from empty container and reference weights - Google Patents

Weight measurement for automatic liq. filling process - by electronic comparison of measured and stored total weights derived from empty container and reference weights

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Publication number
DE2852694A1
DE2852694A1 DE19782852694 DE2852694A DE2852694A1 DE 2852694 A1 DE2852694 A1 DE 2852694A1 DE 19782852694 DE19782852694 DE 19782852694 DE 2852694 A DE2852694 A DE 2852694A DE 2852694 A1 DE2852694 A1 DE 2852694A1
Authority
DE
Germany
Prior art keywords
weight
value
container
net
automatically
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Withdrawn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
DE19782852694
Other languages
German (de)
Inventor
Burkhard Ing Grad Oelte
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.)
BUEHLER OPTIMA MASCHF
Original Assignee
BUEHLER OPTIMA MASCHF
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 BUEHLER OPTIMA MASCHF filed Critical BUEHLER OPTIMA MASCHF
Priority to DE19782852694 priority Critical patent/DE2852694A1/en
Publication of DE2852694A1 publication Critical patent/DE2852694A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G13/00—Weighing apparatus with automatic feed or discharge for weighing-out batches of material
    • G01G13/02—Means for automatically loading weigh pans or other receptacles, e.g. disposable containers, under control of the weighing mechanism
    • G01G13/14—Arrangements for determination of, or compensation for, the tare weight of an unloaded container, e.g. of a disposable container
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G13/00—Weighing apparatus with automatic feed or discharge for weighing-out batches of material
    • G01G13/24—Weighing mechanism control arrangements for automatic feed or discharge
    • G01G13/28—Weighing mechanism control arrangements for automatic feed or discharge involving variation of an electrical variable which is used to control loading or discharge of the receptacle
    • G01G13/285—Weighing mechanism control arrangements for automatic feed or discharge involving variation of an electrical variable which is used to control loading or discharge of the receptacle involving comparison with a reference value
    • G01G13/2851—Weighing mechanism control arrangements for automatic feed or discharge involving variation of an electrical variable which is used to control loading or discharge of the receptacle involving comparison with a reference value for controlling automatic loading of weigh pans or other receptacles
    • G01G13/2852—Weighing mechanism control arrangements for automatic feed or discharge involving variation of an electrical variable which is used to control loading or discharge of the receptacle involving comparison with a reference value for controlling automatic loading of weigh pans or other receptacles involving dribble-feed means controlled by the weighing mechanism to top up the receptacle to the target weight
    • G01G13/2855—Weighing mechanism control arrangements for automatic feed or discharge involving variation of an electrical variable which is used to control loading or discharge of the receptacle involving comparison with a reference value for controlling automatic loading of weigh pans or other receptacles involving dribble-feed means controlled by the weighing mechanism to top up the receptacle to the target weight wherein the main feed is effected by mechanical conveyingmeans, e.g. by belt conveyors, by vibratory conveyors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G13/00—Weighing apparatus with automatic feed or discharge for weighing-out batches of material
    • G01G13/24—Weighing mechanism control arrangements for automatic feed or discharge
    • G01G13/28—Weighing mechanism control arrangements for automatic feed or discharge involving variation of an electrical variable which is used to control loading or discharge of the receptacle
    • G01G13/285—Weighing mechanism control arrangements for automatic feed or discharge involving variation of an electrical variable which is used to control loading or discharge of the receptacle involving comparison with a reference value
    • G01G13/2851—Weighing mechanism control arrangements for automatic feed or discharge involving variation of an electrical variable which is used to control loading or discharge of the receptacle involving comparison with a reference value for controlling automatic loading of weigh pans or other receptacles
    • G01G13/2857—Arrangements for compensating for material suspended at cut-off, i.e. for material which is still falling from the feeder when the weigher stops the feeder
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G13/00—Weighing apparatus with automatic feed or discharge for weighing-out batches of material
    • G01G13/24—Weighing mechanism control arrangements for automatic feed or discharge
    • G01G13/28—Weighing mechanism control arrangements for automatic feed or discharge involving variation of an electrical variable which is used to control loading or discharge of the receptacle
    • G01G13/285—Weighing mechanism control arrangements for automatic feed or discharge involving variation of an electrical variable which is used to control loading or discharge of the receptacle involving comparison with a reference value
    • G01G13/2851—Weighing mechanism control arrangements for automatic feed or discharge involving variation of an electrical variable which is used to control loading or discharge of the receptacle involving comparison with a reference value for controlling automatic loading of weigh pans or other receptacles
    • G01G13/2858—Arrangements for the determination of, or compensation for, the tare weight of an unloaded container, e.g. of a disposable container

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Basic Packing Technique (AREA)

Abstract

A wt. measuring arrangement is for liq. goods automatically drawn off to fill packaging containers. Defined net wts. enable use of indirect wt. measurements for which the associated balance is set to a desired wt. rather than to nill. The empty container (2) is placed on the balance (3) which is then automatically loaded with a reference wt (4), corresp. to the net wt. The sum of the net wt. and the container wt. is stored electronically and the reference wt. then automatically removed. The goods are fed to the container via a delivery system (1) until a delivery switch-off point is determined using the stored wt. The balance contains an electronic measurement unit (5), an electronic store and a comparator. The stored value is continuously compared with the measured value.

Description

Verfahren und Vorrichtung zur Tara- Method and device for tare

Erfassung beim automatischen Abfüllen von Füllgut Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum automatischen AbRElen eines Füllgutes von vorgeschriebenem Netto-Gewicht in einen Verpackungsbehälter, dessen individuelles Taragewicht beim Wiegevorgang durch die Waage berücksichtigt wird. Detection during the automatic filling of filling material The invention relates to a method and a device for the automatic AbRElen a filling material from prescribed net weight in a packaging container, its individual The tare weight is taken into account by the scales during the weighing process.

Es sind bereits Dosierwaagen bekannt, die nach dem Entnahmeprinzip arbeiten, wobei ein Wägesystem mit einer Fördereinrichtung mit einem Vorrat gefüllt wird, der größer ist als die abzuwägende Sollmenge. Dort wird von dem gespeicherten Vorratsbelastungsniveau die Sollmenge als Differenzgewicht entnommen.Dosing scales are already known which operate according to the removal principle work, wherein a weighing system with a conveyor is filled with a supply which is greater than the target amount to be weighed. There is saved from the The target amount is taken as a difference in weight.

Außerdem sind in der Wägetechnik Tariereinrichtungen bekannt, bei welchen eine mit dem Leergewicht (Tara) des Verpackungsbehälters, z.B. einer leren Dose, belastete Waage durch die Tariereinrichtung auf Null gestellt wird. Dort können dann über den Wagebereich im Anschluß an die Null-Stellung Sollgewichte -eingefüllt werden. Dabei können die bekannten Fehlereinwirkungen der Wägetechnik, wie unzureichende Nullpunktkonstanz, nicht ausreichende Linearität des Wägebereiches sowie Temperaturschwankungen auftreten.In addition, taring devices are known in weighing technology which one with the empty weight (tare) of the packaging container, e.g. one empty Can, loaded scale is set to zero by the taring device. There you can then over the wagon area following the zero position target weights -filled will. The known error effects of weighing technology, such as insufficient Zero point constancy, insufficient linearity of the weighing range and temperature fluctuations appear.

Der Erfindung liegt die Aufgabe zugrunde, eine indirekte, individuelle Tara-Erfassunffl zu ermögliehen, bei welcher-die Waage nicht auf Null-Stellung, sondern auf ein Sollgewicht eingestellt wird, in welchem die jeweilige, individuelle Tara bereits berücksichtigt ist.The invention is based on the object of an indirect, individual To enable tare detection, at which-the scales are not in the zero position, but set to a target weight in which the respective, individual tare is already taken into account.

Zur Lösung dieser Aufgabe sind bei einem Verfahren der eingangs beschriebenen Art die im Kennzeichen des Hauptanspruchs angegebenen Verfahrensschritte vorgesehen.To solve this problem, those described at the outset are used in a method Type the process steps specified in the characterizing part of the main claim are provided.

Zur Durchführung dieses Verfahrens ist erfindungsgemäß eine mit einer abschaltbaren Zuführ- oder Transporteinrichtung versehene elektronische Waage vorgesehen, die einen elektronischen Wägegeber und einen elektronischen Speicher sowie einen beispielsweise als Operationsverstärker ausgebildeten Komparator enthält, in welchem der vom Wägegeber ermittelte Ist-Wert. während des Füllvorganges mit dem gespeicherten Soll-Wert verglichen wird.To carry out this method is according to the invention with a electronic scales provided with a feed or transport device that can be switched off, the one electronic weighing transducer and one electronic memory as well as one for example, designed as an operational amplifier contains comparator in which the actual value determined by the weighing transducer. during the filling process with the saved Target value is compared.

Die Erfindung ist nachstehend anhand eines in der Zeichnung dargestellten Aus führungsbeispieles, einer elektronischen Waage mit individueller, automatischer Tara-Erfassung näher beschrieben und erläutert.The invention is illustrated below with reference to one in the drawing From the exemplary embodiment, an electronic scale with individual, automatic Tare detection described and explained in more detail.

Die dargestellte Waage dient zum automatischen Abfüllen eines förderfähigen Füllgutes, das mittels einer abschaltbaren Zuführ- und Transportvorrichtung 1 an die Waage herangeführt und dort in einen Verpackungsbehälter, beim AusfUhrungsbeispiel in eine Dose 2, eingebracht werden soll. Zu Beginn des Fülivorganges wird die leere Dose 2 auf einen Wägetisch 3 gestellt. Dann wird die Waage automatisch mit einem dem einzufüllenden Netto-Gewicht entsprechenden Gewichtsstein 4 belastet. Der sich als Summe aus dem Tara-Gewicht und dem Netto-Gewicht ergebende Belastungswert wird von einem elektronischen Wägegeber 5 in einen nicht dargestellten elektronischen Speicher eingespeichert. Dann wird der Soll-Gewichtsstein 4 automatisch mittels einffl ZyBnin 6 soweit angehoben, daß er während des nun erfolgenden Füllvorganges ohne Einfluß auf die Auflage Y bleibt. Das Füllgut wird bis zum Erreichen des durch den gespeicherten Belastungswert festgelegten Soll-Wertes in die Dose eingebracht. Während dieses Füllvorganges wird der Ist-Wert laufend in eine elektrische Größe umgewandelt und mit dem gespeicherten Soll-Wert in einem nicht dargestellten, beispielsweise als Operationsverstärker ausgebildeten Komparator verglichen. Sobald der Soll-Wert erreicht ist, wird die seither durch die als Dosierschnecke ausgebildete Transporteinrichtung 1 erfolgende Zufuhr des Füllgutes unterbrochen.The scale shown is used for the automatic filling of an eligible Filling material, which by means of a feed and transport device 1 that can be switched off The balance is brought up and there in a packaging container, in the exemplary embodiment in a can 2 is to be introduced. At the beginning of the filling process, the empty Can 2 placed on a weighing table 3. Then the scales automatically with a The weight block 4 corresponding to the net weight to be filled is charged. Which as the sum of the tare weight and the net weight resulting load value from an electronic weighing transducer 5 into an electronic one, not shown Stored in memory. Then the target weight stone 4 is automatic by means of einffl ZyBnin 6 is raised to such an extent that it is during the filling process that is now taking place remains without influence on the edition Y. The product is until it reaches the through the stored load value of the specified target value is introduced into the can. During this filling process, the actual value is continuously converted into an electrical variable converted and with the stored target value in a not shown, for example compared to an operational amplifier designed as a comparator. As soon as the target value is reached, the transport device, which has since been designed as a metering screw, is 1 interrupted supply of the product.

Wenn nach dem Abschalten der Förder- und Transport-Einrichtung noch ein Nachstrom in den Behälter 2 erfolgte kann der Nachstrom in bekannter Weise durch geeignete Einstellung eines Potentiometers als voreilender Wert in dem mechanisch-elektrischen Wandler berücksichtigt werden.If after the conveyor and transport equipment has been switched off an afterflow into the container 2 has taken place, the afterflow can be carried out in a known manner suitable setting of a potentiometer as a leading value in the mechanical-electrical Converter are taken into account.

Der besondere Vorteil des erfindungsgemäßen Verfahrens und der dargestellten, zur Durchführung dieses Verfahrens dienenden Waage liegt darin daß die Waage nicht auf Null-Stellung> sondern auf Soll-Gewicht eingestellt wird, wobei automatisch der jeweilige, individuelle Tara-Wert des Verpackungsbehälters berücksichtigt wird.The particular advantage of the method according to the invention and the illustrated, The balance used to carry out this process is that the balance is not is set to zero position> but to the target weight, whereby automatically the respective, individual tare value of the packaging container is taken into account.

Dadurch wird für jeden Wägevorgang vom momentanen Zustand des Wägesystems ausgegangen und somit Fehlereinwirkungen, wie Ablagerungen, Temperaturschwankungen und Unlinearitäten des Wäge bereiches eliminiert. Ebenfalls vorteilhaft ist die Unterdrückung aes Wägebereiches. Es ist, wie oben beschrieben, nur ein einziger Wägepunkt notwendig, der mit höchster Auflösung versehen werden kann und daher eine sehr hohe Genauigkeit des Netto-Gewichtes gewährleistet.This means that the current status of the weighing system is used for each weighing process assumed and thus error effects such as deposits, temperature fluctuations and non-linearities in the weighing range are eliminated. The is also advantageous Suppression of the weighing range. As described above, there is only one Weighing point necessary, which can be provided with the highest resolution and therefore a very high accuracy of the net weight guaranteed.

LeerseiteBlank page

Claims (3)

Ansprüche 01. Verfahren zum automatischen Ab füllen eines Füllgutes von vorgeschriebenem Nettogewicht in einen Verpackungsbehälter, dessen individuelles Taragewicht beim Wiegevorgang durch die Waage berücksichtigt wird, gekennzeichnet durch folgende Verfahrensschritte: a) der leere Behälter (2) wird auf die Waage (3) gestellt, b) die Waage (3) wird automatisch mit einem dem Nettogewicht entsprechenden Gewichtstein (4) belastet, c) der sich als Summe aus dem Taragewicht und dem Nettogewicht ergebende Belastungswert wird gespeichert, d) der Gewichtsstein wird automatisch abgehoben und e) das Füllgut wird bis zum Erreichen des durch den gespeicherten Belastungswert festgelegten Abschaltpuhkt durch eine Transporteinrichtung (1) in den Behälter (2) eingebracht. Claims 01. A method for automatically filling a product of the prescribed net weight in a packaging container, its individual The tare weight is taken into account by the scales during the weighing process through the following process steps: a) the empty container (2) is placed on the scale (3), b) the scales (3) are automatically set to a value corresponding to the net weight Weight block (4) is charged, c) which is the sum of the tare weight and the net weight The resulting load value is saved, d) the weight stone is automatically lifted off and e) the product is stored until it reaches the Load value specified switch-off point by a transport device (1) in introduced the container (2). 2. Elektrische Waage zum Durchführen des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß sie einen elektronischen Wägegeber (5) und einen elektronischen Speicher sowie einen Komparator enthält, in welchem der vom Wägegeber ermittelte Ist-Wert während des Füllvorganges laufend mit dem gespeicherten Soll-Wert verglichen wird.2. Electric balance for performing the method according to claim 1, characterized in that it has an electronic weighing transducer (5) and a contains electronic memory and a comparator, in which the weighing transducer Determined actual value during the filling process continuously with the stored target value is compared. 3. Waage nach Anspruch 2, dadurch gekennzeichnet, daß zur Kompensation eines Nachstroms ein elektrisches Potentiometer vorgesehen ist, an welchem der Nachstrom als voreilender Gewichtswert einstellbar ist.3. Balance according to claim 2, characterized in that for compensation an electrical potentiometer is provided on which the wake of the wake can be set as a leading weight value.
DE19782852694 1978-12-06 1978-12-06 Weight measurement for automatic liq. filling process - by electronic comparison of measured and stored total weights derived from empty container and reference weights Withdrawn DE2852694A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19782852694 DE2852694A1 (en) 1978-12-06 1978-12-06 Weight measurement for automatic liq. filling process - by electronic comparison of measured and stored total weights derived from empty container and reference weights

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782852694 DE2852694A1 (en) 1978-12-06 1978-12-06 Weight measurement for automatic liq. filling process - by electronic comparison of measured and stored total weights derived from empty container and reference weights

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DE2852694A1 true DE2852694A1 (en) 1980-06-19

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DE19782852694 Withdrawn DE2852694A1 (en) 1978-12-06 1978-12-06 Weight measurement for automatic liq. filling process - by electronic comparison of measured and stored total weights derived from empty container and reference weights

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3209790A1 (en) * 1982-03-17 1983-09-29 Bausch + Ströbel, Maschinenfabrik GmbH + Co, 7174 Ilshofen WASTE DEVICE FOR SCHUETTGUT, ESPECIALLY LIQUIDS
US4533007A (en) * 1982-09-30 1985-08-06 Eagle Machinery Company Combination weighing system with span adjustment device
EP1898189A3 (en) * 2006-09-11 2008-05-21 Suntory Limited Method of filling barrel and filling device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3209790A1 (en) * 1982-03-17 1983-09-29 Bausch + Ströbel, Maschinenfabrik GmbH + Co, 7174 Ilshofen WASTE DEVICE FOR SCHUETTGUT, ESPECIALLY LIQUIDS
EP0089613B1 (en) * 1982-03-17 1986-11-26 Bausch + Ströbel Maschinenfabrik GmbH & Co. Apparatus for the dosed filling of bulk products, especially liquids
US4533007A (en) * 1982-09-30 1985-08-06 Eagle Machinery Company Combination weighing system with span adjustment device
EP1898189A3 (en) * 2006-09-11 2008-05-21 Suntory Limited Method of filling barrel and filling device

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