WO1983000923A1 - Procede et dispositif de mesure de quantites de lait - Google Patents

Procede et dispositif de mesure de quantites de lait Download PDF

Info

Publication number
WO1983000923A1
WO1983000923A1 PCT/DE1982/000170 DE8200170W WO8300923A1 WO 1983000923 A1 WO1983000923 A1 WO 1983000923A1 DE 8200170 W DE8200170 W DE 8200170W WO 8300923 A1 WO8300923 A1 WO 8300923A1
Authority
WO
WIPO (PCT)
Prior art keywords
milk
guide tube
air
deflection
measuring
Prior art date
Application number
PCT/DE1982/000170
Other languages
German (de)
English (en)
Inventor
Agrar Gmbh Alfa-Laval
Original Assignee
Ordolff, Dieter
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 Ordolff, Dieter filed Critical Ordolff, Dieter
Publication of WO1983000923A1 publication Critical patent/WO1983000923A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
    • G01F1/206—Measuring pressure, force or momentum of a fluid flow which is forced to change its direction

Definitions

  • the invention relates to a method for measuring quantities of milk which continuously flow through a measuring device as an air milk mixture.
  • the invention relates to a device for carrying out a method for measuring milk quantities which continuously flow through a measuring vessel as an air milk mixture.
  • milk quantity meters are known, some of which work discontinuously and others which operate discontinuously.
  • Milk quantity measuring devices work, for example, with a dipstick and a direction table for self-checking of the delivery quantity.
  • these devices have the disadvantage that correspondingly complicated conversions are required to determine the volume or the weight.
  • ma machine milking processes one is particularly interested in continuous measuring processes. Since milk is obtained in a continuous flow especially when using tubular milking systems, the interruption of this flow for the purpose of quantity measurement means an additional workload which has a productivity-reducing effect.
  • some of the recommended measuring devices for measuring milk quantities work quite imprecisely, and others, in turn, require quite a lot of equipment.
  • the inaccuracy of the known discontinuous methods essentially stems from the fact that they are based on volume measurements, so that the air fraction dissolved in the milk leads to a falsification of the measurement result. Mixed quantities of milk and air are measured on these devices.
  • Another continuous method is based on measuring the flow time in which the milk flows through a measuring line located between two containers. The result of the time measurement can be registered as a quantity display. The process has the advantage that it can
  • the milk flow is passed through a U-tube that is excited in the middle of its yoke by a vibration, so that the two legs swing around their fixed '.en restraints.
  • the milk flow deflected by the U-tube causes the leg located on the milk inlet side to vibrate differently than the leg on the milk outlet side.
  • the difference between the two vibrations is a measure of the milk flow that flows through the U-tube.
  • the object of the present invention is therefore to improve methods for continuous milk measurement in such a way that an accurate detection of milk quantities is ensured while at the same time gentle treatment of the milk and can be carried out economically.
  • Spare sheet is measured, which is independent of the proportion of dissolved air.
  • a milk quantity measurement carried out according to this method has the advantage that the milk quantities flowing through are recorded without the air dissolved in the milk playing a role in this. This is achieved in that the force of the milk flow is measured, which it experiences during a deflection. This force is proportional to the mass and the square of the speed and inversely proportional to the radius of the deflection. The force is converted into a corresponding deflection, which experiences a guide tube with oscillating bearings and through which the air-milk mixture flows, with an attached guide channel. Since the mass of the air dissolved in the milk flow is negligible compared to the mass of the milk, it does not matter with this measuring method that the milk flowing through is completely degassed by entrained air particles.
  • the deflections of the guide tube from its initial position are therefore a measure of the amount of milk flowing through.
  • the deflection of the guide tube from its initial position which occurs due to the deflection of the milk flow, can be measured in various ways. For example, one can think of purely mechanical transmission options. In the method according to the invention, however, an electronic transmission of the deflection is particularly provided. This has the advantage that the measured value can be tapped from the outside without contact. A precise milk quantity detection can also be carried out with small milk quantities, so that precise measurement results can still be achieved even with a small milk output. can.
  • the measured values can be used, for example, to control the milking machine in accordance with the measured values
  • a further object of the invention is therefore to improve the device of the type mentioned at the outset in such a way that it enables accurate measurement and registration of milk quantity measurements, is largely insensitive to faults and can also easily be retrofitted.
  • a guide tube through which the air-milk mixture flows and with a deflection channel attached is pivoted in a frictionless and swinging manner in its upright position on a tip.
  • This system is limited to a few parts that must be arranged in the milk flow. The milk flows through them so that they are easy to clean.
  • the device is also easy to retrofit and can therefore also be used in already installed milking systems. It is easy to use and easy to maintain.
  • FIG. 1 shows a schematic representation of a device for measuring milk quantity
  • FIG. 1 shows a schematic representation of another device for measuring the amount of milk
  • FIG. 1 The method according to the invention is expediently carried out using a device shown in FIG. 1, from which the internal structure emerges.
  • a float 2 is arranged in a housing 1. This moves in the upper part of the housing 1, which is designed as a float housing 3.
  • the milk enters the guide tube 4 from the float housing 3 with the float 2 raised.
  • the milk falls out of the guide tube 4 due to its own weight into a deflection channel 5 which is open at the top.
  • the flow of milk is deflected through a certain angle in the deflection channel 5.
  • the guide tube 4 with the attached guide channel 5 is pivotally mounted on a tip 6.
  • the guide tube 4 can be held in various ways, for example by holding magnets 7, 8, 9 and 10, which are fastened both to the guide tube 4 and to a discharge housing 11 surrounding the guide tube 4; ( Figure 2) in another embodiment of the method according to the invention, however, it is also possible to mount holding magnets 9, 10 only on one side of the guide tube 4 and the discharge housing 11, while on the other side the guide tube 4 is pressed against a cutting edge bearing 12 , which extends approximately over the entire length of the guide tube 4.
  • the magnetic bearing with the help of the holding magnets also has the advantage that the guide tube 4 is swinging.
  • the measurement method is independent of the air content of the milk flowing through, there is an air suction device 13 on the float housing 3, through which the essential part of the air which is supplied by the air milk mixture is extracted.
  • the air drawn off via the air suction 13 is introduced into the discharge housing 11 via a suction opening 14 and leaves the housing 1 via an outlet opening 15 in the direction of an air cutter.
  • the bearing of the guide tube 4 on the tip 6 has the advantage of a low frictional resistance. In the vertical basic position, the cutting edge bearing 12, against which the guide tube 4 is pulled, runs vertically and thus parallel to the central axis of the guide tube 4.
  • the tip 6 can also be provided in the upper part of the cutting edge bearing 12.
  • the guide tube 4 can also be stored in another way and held in its initial position.
  • the float 2 has the advantage of dampening the milk flow entering the guide tube 4. As a result, the milk only falls from the float housing 3 into the guide tube 4 due to its own weight.
  • the float 2 controls the passage gap in the direction of the guide tube 4.
  • a switch contact 16 can also be connected to the float 2, which ensures that that the milking machine is switched on or off in a certain float position.
  • This start-stop circuit can be seen as a control of the milking machine according to the flow.
  • the float 2 thus has a double function as an on-off switch on the one hand and as a regulator for the flow in the direction of the guide tube 4 on the other.
  • the inlet into the guide tube 4 can also be damped with a constant gap 17.
  • the SchwingerS stem from guide tube 4 and guide channel 5 need not be arranged in the middle of the discharge housing 11.
  • a lateral arrangement improves the spatial utilization of the discharge housing 11.
  • the deflection channel 5 should be open at the top, so that any existing foam has the possibility of being formed on the milk flow without impeding the milk flow. In addition, when the milk flows through the deflection channel, 5 air portions can be extracted from the milk from the open channel. In the case of large quantities of milk to be expected, the deflection channel 5 should be provided with a large diameter, and in the case of small quantities of milk with a smaller diameter. The diameter selected in each case is used as a constant in the calculation of the quantity of milk flowing through.
  • the deflection of the guide tube 4 resulting from the deflection of the milk flow is measured contactlessly by changing the magnetic field.
  • This is possible, for example, in that two magnet-sensitive semiconductors 19, 20 designed as differential field plates are controlled by a magnet 21 attached to the guide tube 4. The resistance of the semiconductors is then the strength
  • the magnetically sensitive semiconductors 19, 20 are fed from a voltage supply 22, and the measuring voltage can be tapped in accordance with the resistance. In this respect, the voltage is proportional to the magnetic field and thus to the deflection of the guide tube 4 (see FIG. 3).
  • two poles 23, 24 of a magnet 32 are fastened next to one another on the guide tube 4, so that on the one hand the south pole and on the other hand the north pole point in the direction of a sensor 25.
  • the guide tube 4 is deflected due to the milk flowing through the deflection channel 5, depending on the attachment of the magnet 32, either the south pole 23 increasingly gains influence if the north pole 24 was previously opposite the sensor 25 or, conversely, the north pole 24. if the south pole 23 previously faced the sensor 25.
  • This arrangement has the advantage that it requires little effort and in particular the electronic further processing of the measured value is possible with an integrated amplifier 26, which is customary in the trade.
  • the entire device In practical operation, the entire device is exposed to large temperature fluctuations. The influence of temperature can be particularly great in the critical operating range if a lot of milk flows that has the body temperature of the cow (37 ° Celsius). In contrast, the device warms up less at low milk flow rates. In these cases there may be considerable deviations in measured values due to the respective device temperature if no measure for temperature correction is provided.
  • the electronics therefore require compensation in order to reduce the sensitivity to temperature.
  • the zero point of the sensor 25 is set externally with the aid of a corresponding voltage.
  • the exact setting of this voltage is carried out with the aid of a potentiometer 27.
  • a temperature-sensitive resistor 28 generates a counter voltage when the temperature changes, which counteracts the influence of temperature (cf. FIG. 4).
  • the output signal of the integrated amplifier 26 is, according to the input signal, not linear.
  • the integrated amplifier 26 is followed by a non-linear amplifier 29 which forms a straight characteristic curve from the output characteristic curve of the differential field plates 20, 21 or the sensor 25 which is curved due to the physical basis of the measurement method described here.
  • the amplifier 29 is connected to a non-linear negative feedback 30, 31 which regulates the gain depending on the input signal.
  • This arrangement can be used either simply or in parallel if required. With a parallel arrangement, each branch can be set individually.
  • the analog voltage is then converted into digital pulses, the frequency of which is proportional to the voltage applied.
  • the number of pulses is then integrated over time.
  • the error accuracy achieved in this way is 1 1/2 to 2%.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

Le procédé est destiné à la mesure de quantités de lait qui s'écoule de façon continue dans un appareil de mesure sous forme d'un mélange de lait et d'air. Selon ce procédé, on mesure la force dynamique qui résulte de la déviation du mélange de lait et d'air, cette force étant indépendante de la fraction d'air dissous. Le dispositif utilisé dans ce procédé se distingue en ce que dans le récipient de mesure se trouve un conduit parcouru par le mélange de lait et d'air, muni d'un canal de déviation et monté pivotant en position verticale sur une pointe sur laquelle il peut osciller sans frottement.
PCT/DE1982/000170 1981-08-28 1982-08-27 Procede et dispositif de mesure de quantites de lait WO1983000923A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813134079 DE3134079A1 (de) 1981-08-28 1981-08-28 Verfahren und vorrichtung zum messen von milchmengen
DEP3134079.2810828 1981-08-28

Publications (1)

Publication Number Publication Date
WO1983000923A1 true WO1983000923A1 (fr) 1983-03-17

Family

ID=6140340

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1982/000170 WO1983000923A1 (fr) 1981-08-28 1982-08-27 Procede et dispositif de mesure de quantites de lait

Country Status (4)

Country Link
EP (1) EP0088090A1 (fr)
JP (1) JPS58501394A (fr)
DE (1) DE3134079A1 (fr)
WO (1) WO1983000923A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0321734U (fr) * 1989-07-11 1991-03-05
DE102004010789B4 (de) * 2003-10-17 2006-01-19 Itec Entwicklungs- Und Vertriebsgesellschaft Mbh Elsterwerda Verfahren und Vorrichtung zur Bestimmung der Menge eines diskontinuierlich fließenden, lufthaltigen Flüssigkeitsstroms, insbesondere eines Milchstroms

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2538785A (en) * 1948-05-10 1951-01-23 Horace E Karig Apparatus for measuring jet reaction of a nozzle
US2800794A (en) * 1953-06-01 1957-07-30 Hugo A Meneghelli Flowmeter
DE1048425B (fr) * 1959-01-08
US3538769A (en) * 1966-10-14 1970-11-10 Kamekichi Shiba Movable tube flowmeter of angular momentum type
DE2404318A1 (de) * 1974-01-30 1975-08-07 Bosch Gmbh Robert Einrichtung zur durchflussmessung von stroemenden medien

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1060612B (de) * 1957-01-31 1959-07-02 Waldenmaier J E H Stroemungsanzeiger
DE1119527B (de) * 1957-03-20 1961-12-14 Schachtbau & Tiefbohr Gmbh Durchflussmengenmessgeraet, insbesondere fuer Bohrspuelungen
DE2607863A1 (de) * 1976-02-24 1977-08-25 Volkhard Dipl Ing Grunert Massendurchflussmesser
CS195498B1 (cs) * 1977-07-07 1980-02-29 Jaroslav Svarcbek Průtokoměr pro průběžné měření kapalin v prostředí podtlaku nebo volného vzduchu

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1048425B (fr) * 1959-01-08
US2538785A (en) * 1948-05-10 1951-01-23 Horace E Karig Apparatus for measuring jet reaction of a nozzle
US2800794A (en) * 1953-06-01 1957-07-30 Hugo A Meneghelli Flowmeter
US3538769A (en) * 1966-10-14 1970-11-10 Kamekichi Shiba Movable tube flowmeter of angular momentum type
DE2404318A1 (de) * 1974-01-30 1975-08-07 Bosch Gmbh Robert Einrichtung zur durchflussmessung von stroemenden medien

Also Published As

Publication number Publication date
JPS58501394A (ja) 1983-08-18
DE3134079A1 (de) 1983-03-17
EP0088090A1 (fr) 1983-09-14

Similar Documents

Publication Publication Date Title
DE2651810C2 (de) Vorrichtung zum automatischen Herstellen einer Lösung mit einer gesteuerten Salzkonzentration
CH640051A5 (de) Beschleunigungsmesser zur bestimmung des vertikalwinkels.
DE2403908B2 (de) Vorrichtung zur Strömungsmessung
DE2718043C3 (de) Elektromagnetischer Durchflußmesser zum genauen Messen der Strömungsgeschwindigkeit eines Fluids in einer normalerweise nicht vollständig gefüllten Leitung
DE69633964T2 (de) Elektromagnetischer Apparat zur Messung des Durchflusses und Kompensationsverfahren des gemessenen Durchflusses
DE4027028A1 (de) Verfahren und vorrichtung zur bestimmung der durchflussmenge eines fluids mit einer pulsierenden stroemung
WO1983000923A1 (fr) Procede et dispositif de mesure de quantites de lait
DE2403874A1 (de) Differenzdruck-messgeber
DE19624974C1 (de) Schwebekörperdurchflußmesser für strömende Flüssigkeiten oder Gase
DE1272011B (de) Vorrichtung zur UEbertragung von fuer industrielle Verfahrensablaeufe charakteristischen Signalen, insbesondere fuer magnetische Stroemungsmesser
CH618792A5 (fr)
DE2026726B2 (de) Vorrichtung zur genauen messung des spezifischen verbrauchs von mit einer einspritzpumpe arbeitenden brennkraftmaschinen
DE102012109598B4 (de) Induktive Wegmesseinrichtung
DE3037172A1 (de) Automatisches bereichseinstellsystem fuer einen magnetischen durchflussmesser
EP0103200A2 (fr) Débitmètre massique
DE10064835A1 (de) Schaltungsanordnung zur Auswertung eines Beschleunigungssensors nach dem Ferrarisprinzip
DE2128944B2 (de) Verfahren und Vorrichtung zur kontinuierlichen Regelung des pH-Wertes
DE3424079A1 (de) Verfahren und vorrichtung zur messung der gasstroemung in einem rohr
EP0267354A1 (fr) Dispositif pour la détermination de la direction de l'écoulement d'un fluide
AT393729B (de) Anordnung zur belueftungsregelung von laengsbeluefteten tunnels
DE2453704C2 (de) Schaltungsanordnung eines Signalverstärkers für ein mittels einer Meßbrücke erzeugtes Signal
DE3740603A1 (de) Einrichtung zur messung des volumenstromes fuer aus einem oder in einen offenen behaelter ab- bzw. zulaufende fluessigkeit
DE1295206B (de) Verfahren und Vorrichtung zur Einstellung der virtuellen Messfeldlaenge einer Mehrzahl von in UEberwachungsgeraeten vorgesehenen Messumformern
DE1242891C2 (de) Vorrichtung zur kapazitiven fuellstansmessung
DE1252921B (de) Geraet zur UEberwachung des Fuellzustandes eines Behaelters

Legal Events

Date Code Title Description
AK Designated states

Designated state(s): JP US

AL Designated countries for regional patents

Designated state(s): FR GB NL SE

WWE Wipo information: entry into national phase

Ref document number: 1982902639

Country of ref document: EP

CR1 Correction of entry in section i
WWP Wipo information: published in national office

Ref document number: 1982902639

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1982902639

Country of ref document: EP