DE4004192A1 - Water content measuring appts. for baking fluid - measures variation in dielectric constant of fluid with compensation of temp. variations - Google Patents

Water content measuring appts. for baking fluid - measures variation in dielectric constant of fluid with compensation of temp. variations

Info

Publication number
DE4004192A1
DE4004192A1 DE19904004192 DE4004192A DE4004192A1 DE 4004192 A1 DE4004192 A1 DE 4004192A1 DE 19904004192 DE19904004192 DE 19904004192 DE 4004192 A DE4004192 A DE 4004192A DE 4004192 A1 DE4004192 A1 DE 4004192A1
Authority
DE
Germany
Prior art keywords
fluid
water content
dielectric constant
temp
variation
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.)
Ceased
Application number
DE19904004192
Other languages
German (de)
Inventor
Siegfried Hauber
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.)
HAUBER ELEKTRONIK GmbH
Original Assignee
HAUBER ELEKTRONIK GmbH
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
Priority claimed from DE19893940032 external-priority patent/DE3940032A1/en
Application filed by HAUBER ELEKTRONIK GmbH filed Critical HAUBER ELEKTRONIK GmbH
Priority to DE19904004192 priority Critical patent/DE4004192A1/en
Publication of DE4004192A1 publication Critical patent/DE4004192A1/en
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/26—Oils; Viscous liquids; Paints; Inks
    • G01N33/28—Oils, i.e. hydrocarbon liquids
    • G01N33/2835—Specific substances contained in the oils or fuels
    • G01N33/2847—Water in oils

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Biochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

The arrangement for measuring the water content of motor vehicle brake fluid has a measurement sensor consisting of two measurement rings mounted in plastic to form a capacitor which uses the brake fluid as a dielectric and which measures the variation in the dielectric constant caused by the water content variation. A negative temp. coefft. resistor integrated into the sensor compensates the variation of dielectric constant with temp.. The evaluation electronics can be a window discriminator, digital display or computer controller. USE/ADVANTAGE - Motor vehicles. Has characteristic which can be altered to enable all brake fluids on market to be measured.

Description

Zweckpurpose

Durch den Typenumschalter können 4 (oder mehr) Gruppen von Bremsflüssigkeiten angewählt werden, um die unterschiedlichen chemischen Zusammensetzungen von verschiedenen Herstellern zu kompensieren.The type switch allows 4 (or more) groups of Brake fluids can be selected to match the different chemical compositions from different manufacturers to compensate.

Stand der TechnikState of the art

Die bisher bekannten Geräte können nur jeweils für 1 Produkt mit ausreichender Genauigkeit eingesetzt werden.The previously known devices can only can be used for 1 product with sufficient accuracy.

Kritikcriticism

Eine KFZ-Werkstatt könnte nur bei 1 Produkt bzw. Produkt­ gruppe den Wassergehalt messen oder müßte mehrere Geräte mit verschiedener Justierung haben.A car workshop could only have 1 product or product group to measure the water content or would need multiple devices with different adjustments.

Aufgabetask

Das Meßgerät muß umschaltbar sein.The measuring device must be switchable.

Lösungsolution

Durch den Einbau eines Stufenschalters können z. B. 4 ver­ schiedene Gruppen von Bremsflüssigkeiten angewählt werden, deren Verstärkungsfaktor damit den Kennlinien angepaßt wird.By installing a tap changer z. B. 4 ver different groups of brake fluids are selected, whose gain factor is thus adapted to the characteristics.

Vorteiladvantage

Man kann mit einem Gerät alle auf dem Markt üblichen Bremsflüssigkeiten messen.You can do all the usual on the market with one device Measure brake fluids.

Aufbauconstruction

In dem Meßgerät Typ 493 ist ein Stufenschalter eingebaut, der durch einen Drehknopf an der Frontseite betätigt wird. Die Funktionsbeschreibung wird durch die (erweiterbare) tabellarische Aufstellung der 4 oder mehr Gruppen von Bremsflüssigkeiten erweitert.A step switch is built into the type 493 measuring device, which is operated by a rotary knob on the front. The functional description is given by the (expandable) Tabular listing of the 4 or more groups of Brake fluids expanded.

Claims (2)

Oberbegriff:
Meßgerät zur Bestimmung des Wassergehalts in Bremsflüssigkeiten von Kraftfahrzeugen,Generic term:
Measuring device for determining the water content in brake fluids of motor vehicles, kennz. Teil:
dadurch gekennzeichnet,
daß der Meßfühler aus zwei Messingringen besteht, die in Kunststoff gelagert sind und zusammen einen Kondensator bilden, der die Bremsflüssigkeit als Dielektrikum benützt und die Veränderung der Dielektrizitätskonstante durch die Veränderung des Wassergehalts mißt,
daß im Fühler ein temperaturabhängiger NTC-Widerstand eingebaut ist, der die Veränderung der Dielektrizitäts­ konstante durch die Temperatur kompensiert,
daß die Auswerteelektronik als Fensterdiskriminator oder als Digitalanzeige oder als Rechneransteuerung ausgeführt werden kann,
daß das Meßgerät für verschiedene Produktgruppen entsprechend deren Kennlinie umschaltbar ist.mark Part:
characterized,
that the sensor consists of two brass rings, which are mounted in plastic and together form a capacitor that uses the brake fluid as a dielectric and measures the change in dielectric constant due to the change in water content,
that a temperature-dependent NTC resistor is installed in the sensor, which compensates for the change in dielectric constant due to the temperature,
that the evaluation electronics can be designed as a window discriminator or as a digital display or as a computer control,
that the measuring device can be switched for different product groups according to their characteristic.
DE19904004192 1989-12-04 1990-02-12 Water content measuring appts. for baking fluid - measures variation in dielectric constant of fluid with compensation of temp. variations Ceased DE4004192A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19904004192 DE4004192A1 (en) 1989-12-04 1990-02-12 Water content measuring appts. for baking fluid - measures variation in dielectric constant of fluid with compensation of temp. variations

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893940032 DE3940032A1 (en) 1989-12-04 1989-12-04 Water content measuring appts. for vehicle braking fluid - has capacitive sensor using brake fluid as dielectric and negative temp. coefficient compensation resistor
DE19904004192 DE4004192A1 (en) 1989-12-04 1990-02-12 Water content measuring appts. for baking fluid - measures variation in dielectric constant of fluid with compensation of temp. variations

Publications (1)

Publication Number Publication Date
DE4004192A1 true DE4004192A1 (en) 1991-08-22

Family

ID=25887640

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19904004192 Ceased DE4004192A1 (en) 1989-12-04 1990-02-12 Water content measuring appts. for baking fluid - measures variation in dielectric constant of fluid with compensation of temp. variations

Country Status (1)

Country Link
DE (1) DE4004192A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19755418A1 (en) * 1997-12-12 1999-06-24 Fraunhofer Ges Forschung Sensor measuring complex impedances
DE19755417A1 (en) * 1997-12-12 1999-07-01 Fraunhofer Ges Forschung Evaluation circuit for determining complex impedances, device for measuring complex impedances and use of the device
CN105861792A (en) * 2016-06-02 2016-08-17 江苏丰东热处理及表面改性工程技术研究有限公司 Online water content measuring device for thermal treatment furnace quenching oil

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1130622B (en) * 1958-07-02 1962-05-30 Gann App Und Maschb Ges M B H Measuring capacitor for determining the water content of bulk material
DE2207790A1 (en) * 1972-02-18 1973-05-17
US3768006A (en) * 1972-10-30 1973-10-23 Daniel Ind Inc Method and apparatus for direct measurement of percent
DE3006696A1 (en) * 1979-02-21 1980-10-09 Northern Instruments Corp Material dielectric constant measuring device - has electrode placed in material with HF excitation used to determine change in capacitance of electrode
DE3117525A1 (en) * 1980-05-05 1982-08-19 Etablissements Wanson, Construction de Matériel Thermique, S.A., 1130 Bruxelles Method and device for quantitatively determining a liquid fuel which contains water
EP0080632A1 (en) * 1981-11-17 1983-06-08 Nissan Motor Co., Ltd. Oil deterioration detector
DE3307588A1 (en) * 1982-03-04 1983-10-13 L'Oreal, 75008 Paris DEVICE FOR MEASURING THE DIELECTRICITY CONSTANT OF VISCOSES OR PASTOESE SUBSTANCES
DE3221403A1 (en) * 1982-06-05 1983-12-08 Beier, Monika, 7000 Stuttgart Test instrument for determining the water content of brake fluid
DE3413135A1 (en) * 1984-04-06 1985-10-17 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München MEASURING PROBE FOR DETECTING QUALITATIVE CHANGES OF LIQUIDS
DE3426009A1 (en) * 1984-07-14 1986-01-16 Franz Ludwig Meß- und Regeltechnik, 6500 Mainz Device for measuring material properties, especially for moisture
DE3436421A1 (en) * 1984-10-04 1986-04-10 Woellner-Werke, 6700 Ludwigshafen Instrument for measuring the conductance of liquids
DE3517065A1 (en) * 1985-05-11 1986-11-13 SMS Schloemann-Siemag AG, 4000 Düsseldorf ARRANGEMENT FOR MONITORING THE MIXTURE OF TWO LIQUIDS
DE3518186A1 (en) * 1985-05-21 1986-11-27 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Device for detecting the effective dielectric constant of a medium, particularly for determining the water content in a filled container for oil or alcohol
DE3520858A1 (en) * 1985-06-11 1986-12-11 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart DEVICE FOR MONITORING WATER SOLVED IN HYDRAULIC FLUID OF A BRAKING SYSTEM

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1130622B (en) * 1958-07-02 1962-05-30 Gann App Und Maschb Ges M B H Measuring capacitor for determining the water content of bulk material
DE2207790A1 (en) * 1972-02-18 1973-05-17
US3768006A (en) * 1972-10-30 1973-10-23 Daniel Ind Inc Method and apparatus for direct measurement of percent
DE3006696A1 (en) * 1979-02-21 1980-10-09 Northern Instruments Corp Material dielectric constant measuring device - has electrode placed in material with HF excitation used to determine change in capacitance of electrode
DE3117525A1 (en) * 1980-05-05 1982-08-19 Etablissements Wanson, Construction de Matériel Thermique, S.A., 1130 Bruxelles Method and device for quantitatively determining a liquid fuel which contains water
EP0080632A1 (en) * 1981-11-17 1983-06-08 Nissan Motor Co., Ltd. Oil deterioration detector
DE3307588A1 (en) * 1982-03-04 1983-10-13 L'Oreal, 75008 Paris DEVICE FOR MEASURING THE DIELECTRICITY CONSTANT OF VISCOSES OR PASTOESE SUBSTANCES
DE3221403A1 (en) * 1982-06-05 1983-12-08 Beier, Monika, 7000 Stuttgart Test instrument for determining the water content of brake fluid
DE3413135A1 (en) * 1984-04-06 1985-10-17 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München MEASURING PROBE FOR DETECTING QUALITATIVE CHANGES OF LIQUIDS
DE3426009A1 (en) * 1984-07-14 1986-01-16 Franz Ludwig Meß- und Regeltechnik, 6500 Mainz Device for measuring material properties, especially for moisture
DE3436421A1 (en) * 1984-10-04 1986-04-10 Woellner-Werke, 6700 Ludwigshafen Instrument for measuring the conductance of liquids
DE3517065A1 (en) * 1985-05-11 1986-11-13 SMS Schloemann-Siemag AG, 4000 Düsseldorf ARRANGEMENT FOR MONITORING THE MIXTURE OF TWO LIQUIDS
DE3518186A1 (en) * 1985-05-21 1986-11-27 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München Device for detecting the effective dielectric constant of a medium, particularly for determining the water content in a filled container for oil or alcohol
DE3520858A1 (en) * 1985-06-11 1986-12-11 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart DEVICE FOR MONITORING WATER SOLVED IN HYDRAULIC FLUID OF A BRAKING SYSTEM

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19755418A1 (en) * 1997-12-12 1999-06-24 Fraunhofer Ges Forschung Sensor measuring complex impedances
DE19755417A1 (en) * 1997-12-12 1999-07-01 Fraunhofer Ges Forschung Evaluation circuit for determining complex impedances, device for measuring complex impedances and use of the device
DE19755417C2 (en) * 1997-12-12 1999-11-04 Fraunhofer Ges Forschung Evaluation circuit for determining complex impedances, device for measuring complex impedances and use of the device
CN105861792A (en) * 2016-06-02 2016-08-17 江苏丰东热处理及表面改性工程技术研究有限公司 Online water content measuring device for thermal treatment furnace quenching oil

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