DE3343290A1 - Measurement method for determining the depth of an electrically conductive fluid layer - Google Patents

Measurement method for determining the depth of an electrically conductive fluid layer

Info

Publication number
DE3343290A1
DE3343290A1 DE19833343290 DE3343290A DE3343290A1 DE 3343290 A1 DE3343290 A1 DE 3343290A1 DE 19833343290 DE19833343290 DE 19833343290 DE 3343290 A DE3343290 A DE 3343290A DE 3343290 A1 DE3343290 A1 DE 3343290A1
Authority
DE
Germany
Prior art keywords
fluid layer
electrically conductive
determining
measurement method
depth
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Withdrawn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
DE19833343290
Other languages
German (de)
Inventor
Thomas Dipl.-Ing. 7903 Laichingen Kächele
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19833343290 priority Critical patent/DE3343290A1/en
Publication of DE3343290A1 publication Critical patent/DE3343290A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
    • 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
    • G01B7/14—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
    • G01B7/144—Measuring play on bearings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
    • G01F23/242—Mounting arrangements for electrodes

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

The measurement method is based on measuring the ohmic resistance of the fluid between two electrodes which are installed flush in the wall wetted by the fluid. Apart from the small and inexpensive design, the sensor is resistant to wear and also suitable for dynamic measurements.

Description

Beschreibung description

zur Patentanmeldung Messverfahren zur Bestimmung der Höhe einer elektrisch leitfähigen Fluidschicht Die bekannten Widerstandsmeßverfahren zur Bestimmung der Höhe einer Pluidschicht messen den ohm'schen Widerstand des Fluids zwischen zwei gegenüberliegenden Elektroden. for patent application Measurement method for determining the height of an electrical conductive fluid layer The known resistance measuring method for determining the Height of a pluid layer measure the ohmic resistance of the fluid between two opposing electrodes.

Dies führt vor allem in bewegten Systemen zu Einschränkungen.This leads to restrictions, especially in moving systems.

Die Aufgabe der Erfindung ist es, die Höhe einer Fluidschicht zwischen ruhenden FXg t und oder bewegten Oberflächen (Begrenzungsflächen) Fig 2 zu messen. Die Erwindung zeichnet sich dadurch aus, daß der MeßNertaufnehmer verschleißfest und billig in der Herstellung ist und in sehr kleinen Größer hergestellt werden kann.The object of the invention is to determine the height of a fluid layer between to measure stationary FXg t and or moving surfaces (boundary surfaces) Fig 2. The development is characterized by the fact that the measuring transducer is wear-resistant and is cheap to manufacture and made in very small sizes can.

Der Aufnehmer wird in eine ruhende Pig 1 oder bewegte Wand Fig 2 eingebaut. Er besteht aus zwei Elektroden.The sensor is built into a stationary Pig 1 or a moving wall Fig. 2. It consists of two electrodes.

Ist die Wand elektrisch nichtleitend , so können die Elektroden direkt eingebaut werden Fig 1. Bei elektrisch leitender Wand müssen die Elektroden elektrisch isoliert werden z.B. durch eingießen in kunstharz Fig 2. £ie den Elektroden gegenüberliegende 'and muß elektrisch nichtleitend sein.If the wall is electrically non-conductive, the electrodes can directly be installed Fig 1. If the wall is electrically conductive, the electrodes must be electrically are isolated e.g. by pouring them into synthetic resin Fig 2. The electrodes opposite the electrodes 'and must be electrically non-conductive.

Tor ohm'sche Widerstand der Fluidschicht an den Elektroden wird in einer Meßbrücke rnit einem Trägerfrequenzverstärker ermittelt. Ist die zu messende Fluidschichthöhe kleiner als der Elektrodenabstand, so ergibt sich mit zunehmender Schichthöhe eine lineare Widerstandsabnehme, da sich in der Fluidschicht ein ebenes elektrisches Feld ausbildet.Tor ohmic resistance of the fluid layer at the electrodes is in a measuring bridge with a carrier frequency amplifier. Is the one to be measured Fluid layer height is smaller than the electrode spacing, the higher the layer height, the result is a linear decrease in resistance, since there is a flat electrical in the fluid layer Field trains.

In einem Gleitlagerversuchsstand wurde der oben beschriebene Aufnehmer Fig 2 untersucht. Die Kalibrierkurve Pig 3 zeigt den proportionalen Bereich für kleine Fluidechichtenhöhen und den nichtlinearen Bereich bei großen Fluidschichthöhen. Bei den Untersuchungen zeigte der Aufnehmer keinen nennenswerten Verschleiß, obwohl das Gleitlager längere Zeit im Mischreibungegebiet arbeitete. The transducer described above was used in a plain bearing test stand Fig. 2 examined. The calibration curve Pig 3 shows the proportional range for small fluid layer heights and the non-linear region at large fluid layer heights. During the tests, the transducer showed no significant wear, although the plain bearing worked in the mixed friction area for a long time.

Weitere Ausführungsbeispiele: Einbau des Aufnehmers in Fahrzeugreifen zur Untersuchung und tberwqchung von Aquaplaning.Further exemplary embodiments: Installation of the sensor in vehicle tires for the investigation and monitoring of aquaplaning.

Überwachung und Einstellung von Spaltringen und Dichtungen in Maschinen.Monitoring and adjustment of wear rings and seals in machines.

L e e r s e i t eL e r s e i t e

Claims (1)

Patentanspruch zur Patentanmeldung Meßverfahren zur Bestimmung der Höhe einer elektrisch leitfähigen Sluidschicht Das Messverfahren zur Bestimmung der Höhe einer elektrisch leitfähigen Fiuidschicht ist durch einen Aufnehmer gekennzeichnet, der aus zwei wandbündig eingebauten Elektroden besteht, an denen der ohmsche Widerstand der über den Elektroden befindlichen Fluidschicht gemessen wird. Der ohm'sche Widerstand ist ein Maß für die Höhe der Pluidschicht. Claim for patent registration Measuring method for determining the Height of an electrically conductive sluid layer The measuring method for determination the height of an electrically conductive fluid layer is marked by a sensor, which consists of two electrodes installed flush with the wall, on which the ohmic resistance the fluid layer above the electrodes is measured. The ohmic resistance is a measure of the height of the pluid layer.
DE19833343290 1983-11-30 1983-11-30 Measurement method for determining the depth of an electrically conductive fluid layer Withdrawn DE3343290A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19833343290 DE3343290A1 (en) 1983-11-30 1983-11-30 Measurement method for determining the depth of an electrically conductive fluid layer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833343290 DE3343290A1 (en) 1983-11-30 1983-11-30 Measurement method for determining the depth of an electrically conductive fluid layer

Publications (1)

Publication Number Publication Date
DE3343290A1 true DE3343290A1 (en) 1985-06-13

Family

ID=6215650

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19833343290 Withdrawn DE3343290A1 (en) 1983-11-30 1983-11-30 Measurement method for determining the depth of an electrically conductive fluid layer

Country Status (1)

Country Link
DE (1) DE3343290A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2442598A1 (en) * 1974-09-05 1976-05-06 Erichsen Gmbh & Co Kg Thickness of liquid layers measuring device - has two level measuring supports for layers on plates or strips

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2442598A1 (en) * 1974-09-05 1976-05-06 Erichsen Gmbh & Co Kg Thickness of liquid layers measuring device - has two level measuring supports for layers on plates or strips

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8139 Disposal/non-payment of the annual fee