FR2436371A1 - UNIVERSAL LEVEL INDICATOR, RESONANCE TYPE - Google Patents

UNIVERSAL LEVEL INDICATOR, RESONANCE TYPE

Info

Publication number
FR2436371A1
FR2436371A1 FR7917465A FR7917465A FR2436371A1 FR 2436371 A1 FR2436371 A1 FR 2436371A1 FR 7917465 A FR7917465 A FR 7917465A FR 7917465 A FR7917465 A FR 7917465A FR 2436371 A1 FR2436371 A1 FR 2436371A1
Authority
FR
France
Prior art keywords
oscillating circuit
level indicator
resonance type
universal level
resonance
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.)
Granted
Application number
FR7917465A
Other languages
French (fr)
Other versions
FR2436371B3 (en
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.)
ENERGOINVEST
Original Assignee
ENERGOINVEST
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 ENERGOINVEST filed Critical ENERGOINVEST
Publication of FR2436371A1 publication Critical patent/FR2436371A1/en
Application granted granted Critical
Publication of FR2436371B3 publication Critical patent/FR2436371B3/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01F23/28—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 the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/296—Acoustic waves
    • G01F23/2966—Acoustic waves making use of acoustical resonance or standing waves
    • G01F23/2967—Acoustic waves making use of acoustical resonance or standing waves for discrete levels

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

Indicateur de niveau à résonance. Il comporte une sonde dont l'élément détecteur 26 est un fil métallique enroulé en hélice spiralée, enrobé de résine 56. L'élément 26 est monté en parallèle avec un condensateur 25 pour former un circuit oscillant qu'alimente un oscillateur à fréquence égale à la fréquence de résonance du circuit oscillant L'entrée en contact de l'élément 26 avec le produit à jauger perturbe le mode de résonance du circuit oscillant et cette modification est décelée par un détecteur sous forme de variation de la tension décelée. Un tel indicateur permet des mesures de niveau sur des produits très variés : solides en vrac ou liquides conducteurs ou non de l'électricité.Resonance level meter. It comprises a probe whose detector element 26 is a metal wire wound in a spiral helix, coated with resin 56. Element 26 is mounted in parallel with a capacitor 25 to form an oscillating circuit supplied by an oscillator at a frequency equal to the resonant frequency of the oscillating circuit The entry into contact of the element 26 with the product to be gauged disturbs the resonance mode of the oscillating circuit and this modification is detected by a detector in the form of a variation in the voltage detected. Such an indicator allows level measurements on a wide variety of products: bulk solids or liquids which may or may not conduct electricity.

FR7917465A 1978-07-06 1979-07-05 UNIVERSAL LEVEL INDICATOR, RESONANCE TYPE Expired FR2436371B3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
YU161278A YU161278A (en) 1978-07-06 1978-07-06 Universal resonance level signaling device

Publications (2)

Publication Number Publication Date
FR2436371A1 true FR2436371A1 (en) 1980-04-11
FR2436371B3 FR2436371B3 (en) 1982-02-12

Family

ID=25554872

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7917465A Expired FR2436371B3 (en) 1978-07-06 1979-07-05 UNIVERSAL LEVEL INDICATOR, RESONANCE TYPE

Country Status (4)

Country Link
DE (1) DE2927093A1 (en)
FR (1) FR2436371B3 (en)
GB (1) GB2027210A (en)
YU (1) YU161278A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4956606A (en) * 1984-10-17 1990-09-11 Mine Safety Appliances Company Non-contact inductive distance measuring system with temperature compensation
WO1989001135A1 (en) * 1987-07-30 1989-02-09 Allied-Signal Inc. Sensor and method for detecting levels of conductive liquids
US4912407A (en) * 1987-07-30 1990-03-27 Allied-Signal Inc. Non-contacting inductively coupled displacement sensor system for detecting levels of conductive, non-magnetic liquids, and method of detecting levels of such liquids
DE102008027921B4 (en) * 2008-06-12 2011-11-10 Ifm Electronic Gmbh Admittance measuring device for a level sensor

Also Published As

Publication number Publication date
YU161278A (en) 1982-10-31
GB2027210A (en) 1980-02-13
FR2436371B3 (en) 1982-02-12
DE2927093A1 (en) 1980-01-17

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