DE708389C - Device for determining the moisture content of grainy material, especially grain, by measuring the electrical conductivity - Google Patents

Device for determining the moisture content of grainy material, especially grain, by measuring the electrical conductivity

Info

Publication number
DE708389C
DE708389C DEK152850D DEK0152850D DE708389C DE 708389 C DE708389 C DE 708389C DE K152850 D DEK152850 D DE K152850D DE K0152850 D DEK0152850 D DE K0152850D DE 708389 C DE708389 C DE 708389C
Authority
DE
Germany
Prior art keywords
moisture content
measuring
determining
electrical conductivity
grain
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.)
Expired
Application number
DEK152850D
Other languages
German (de)
Inventor
Dr Rudolf Rueter
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.)
KURT KAMPFFMEYER
Original Assignee
KURT KAMPFFMEYER
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 KURT KAMPFFMEYER filed Critical KURT KAMPFFMEYER
Priority to DEK152850D priority Critical patent/DE708389C/en
Application granted granted Critical
Publication of DE708389C publication Critical patent/DE708389C/en
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/048—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance for determining moisture content of the material

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Description

Vorrichtung zur Bestimmung des Feuchtigkeitsgehaltes von körnigem Gut, insbesondere Getreide, durch Messung der elektrischen Leitfähigkeit Es ist bekannt die Feuchtigkeitsbestimmung von Getreide auf elektrischem Wege vorzunehmen, indem die Dielektrizitätskonstante des Meßgutes als Funktion des Wassergehaltes gemessen wird.Device for determining the moisture content of granular Well, especially grain, by measuring the electrical conductivity it is known to determine the moisture content of grain electrically, by the dielectric constant of the material being measured as a function of the water content is measured.

Auch ist es bekannt, die Kornfeuchtigkeit nach dem Prinzip der elektrischen Leitfähigkeitsmessung zu ermitteln. Hierbei wird das zu untersuchende Getreide z. B. durch zwei isoliert gelagerte geriffelte Walzenelektroden hindurchgeführt. Bei dieser bekannten Vorrichtung werden fehlerhatte Werte erhalten. wenn die Korngröße des Meßgutes ver schieden ist. Während bei großen Körnern (vgl. Fig. I der Zeichnung eine große Elektrodenfläche für die Stromzuführung vorliegt indem zahlreiche Riffeln die Schale durchschneiden, wird bei kleinen Körnern (Fig. die Schale nur von wenigen Riffeln angeschnitten bzw. gar nicht berührt. Infolge der durch die abweichende Korngröße verursachten Verschiedenheit der stromzuführenden Elektrodenflächen zeigen großkörnige Getreidesorten zu hohe Feuchtigkeitsmeßwerte, während gleich feuchte, aber kleinkörnige Sorten zu niedrige Meßzahlen liefern. It is also known that the grain moisture according to the principle of electrical To determine conductivity measurement. Here, the grain to be examined is z. B. passed through two insulated grooved roller electrodes. at faulty values are obtained from this known device. when the grain size of the material to be measured is different. While with large grains (see. Fig. I of the drawing there is a large electrode area for the power supply by means of numerous corrugations cut through the shell, with small grains (Fig. the shell is only used by a few Corrugations trimmed or not touched at all. As a result of the deviating Show grain size caused difference of the current-carrying electrode surfaces large-grain cereals too high moisture readings, while equally moist, but small-grain varieties give too low a measurement number.

Nach der Erfindung werden die Nachteile des bekannten Verfahrens dadurch ausgeschaltet, daß als Elektroden ein elektrisch isoliertes Mahlsystem mit allmählich enger werdendem Mahlspalt verwendet wird, welches aus einem geriffelten Mahikegel und einem isoliert angeordneten geriffelten Mahlringkonus besteht, ähnlich wie bei einer oaffeemühle. Die Körner werden hierbei zunächst bei weitem und dann bei allmählich kleiner werdendem Elektrodenabstand vermahlen, so daß die mit der Kornsubstanz in Berührung stehende Elektrodenfläche bei klein- und großkörnigem Meßgut ungefähr gleich ist. According to the invention, the disadvantages of the known method switched off in that an electrically isolated grinding system with as electrodes gradually narrowing grinding gap is used, which consists of a fluted Mahi cone and an isolated fluted grinding ring cone is similar like an oaffe grinder. The grains are here first by far and then grind with gradually decreasing electrode spacing so that the one with the Electrode surface in contact with grain substance for small and large grains Material to be measured is approximately the same.

In Fig. 3 ist das Mahlsystem gemäß der vorliegenden Erfindung dargestellt. Der geriffelte Mahlkegel I ist in dem ebenfalls geriffehen Konus 2 isoliert angeordnet.In Fig. 3, the grinding system according to the present invention is shown. The corrugated grinding cone I is arranged in an isolated manner in the cone 2, which is also corrugated.

Zur Bestimmung des Feuchtigkeitsgehaltes wird eine Probe des Meßgutes in die Mahlvorrichtung gemäß Fig. 3 eingefüllt, gemahlen und währenddessen ein elektrische Strom geeignet er Spannung durch das Mahl gut geleitet. Die Stromstärke wird mit einem Milliampermeter, dessen Skala in Feuchtigkeitsprozenten geeicht ist, gemessen. A sample of the material to be measured is used to determine the moisture content Filled into the grinding device according to FIG. 3, ground and meanwhile an electric Suitable for electricity, the voltage is well conducted through the meal. The current strength is with a milliampermeter, the scale of which is calibrated in moisture percentages.

Die Temperaturkorrektur kann dabei in der allgemein bekannten Weise entweder mechanisch durch Skalaverschiebung oder elektrisch durch Änderung eines Shuntwiderstandes zum Meßinstrument bewirkt werden. Die Vorrichtung gemäß der Erfindung kann selbstverständlich auch zar fortlaufenden Messung des Feuchtigkeitsgehaltes unter Verwendung eines mechanisch angetriebenen Mahlwerkes und einer entsprechenden Temperaturkorrektur benutzt werden. The temperature correction can be carried out in the generally known manner either mechanically by shifting the scale or electrically by changing one Shunt resistance to the measuring instrument are effected. The device according to the invention can of course also be used for continuous measurement of the moisture content using a mechanically driven grinder and a corresponding one Temperature correction can be used.

Claims (1)

P A T E N T A N S P R U C H Vorrichtung zur Bestimmung des Feuchtigkeitsgehaltes von körnigem Gut, insbesondere Getreide, durch Messung der elektrischen Leitfähigkeit unter VXerwendung bewegter, mit Riffeln versehener Elektroden, welche ein Mahhverk für das Meßgut bilden, dadurch gekennzeichnet, daß das Mahlwerk aus einem geriffelten Mablkegel und einem isoliert angeordneten geriffelten Mahlringkonus mit allmählich enger werdendem Mahlspalt besteht, in welchem das Mel3gut zerkleinert und der durch das Mahlgut hindurchfließende Strom gemessen wird. P A T E N T A N S P R U C H Device for determining the moisture content of granular material, especially grain, by measuring the electrical conductivity using moving electrodes provided with corrugations, which a Mahhverk Form for the material to be measured, characterized in that the grinder consists of a fluted Mablkegel and an isolated arranged fluted grinding ring cone with gradually There is a narrowing grinding gap in which the material to be milled is crushed and the through the current flowing through the grist is measured.
DEK152850D 1938-12-23 1938-12-23 Device for determining the moisture content of grainy material, especially grain, by measuring the electrical conductivity Expired DE708389C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK152850D DE708389C (en) 1938-12-23 1938-12-23 Device for determining the moisture content of grainy material, especially grain, by measuring the electrical conductivity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK152850D DE708389C (en) 1938-12-23 1938-12-23 Device for determining the moisture content of grainy material, especially grain, by measuring the electrical conductivity

Publications (1)

Publication Number Publication Date
DE708389C true DE708389C (en) 1941-07-19

Family

ID=7252685

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK152850D Expired DE708389C (en) 1938-12-23 1938-12-23 Device for determining the moisture content of grainy material, especially grain, by measuring the electrical conductivity

Country Status (1)

Country Link
DE (1) DE708389C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1129323B (en) * 1955-05-31 1962-05-10 Franz Pfeuffer Moisture meter with grinding electrodes
DE1151683B (en) * 1958-01-20 1963-07-18 K P Mundinger G M B H Device for continuous measurement of the moisture content of pre-dried, pourable material
DE3904653A1 (en) * 1989-02-16 1990-08-23 Pfeuffer Gmbh Mess Und Pruefge Measuring cell
EP0671623A1 (en) * 1994-03-09 1995-09-13 Protimeter Plc Apparatus for measuring moisture content of grain or the like

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1129323B (en) * 1955-05-31 1962-05-10 Franz Pfeuffer Moisture meter with grinding electrodes
DE1151683B (en) * 1958-01-20 1963-07-18 K P Mundinger G M B H Device for continuous measurement of the moisture content of pre-dried, pourable material
DE3904653A1 (en) * 1989-02-16 1990-08-23 Pfeuffer Gmbh Mess Und Pruefge Measuring cell
EP0671623A1 (en) * 1994-03-09 1995-09-13 Protimeter Plc Apparatus for measuring moisture content of grain or the like

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