NO962274L - Method and apparatus for detecting boundary layers - Google Patents

Method and apparatus for detecting boundary layers

Info

Publication number
NO962274L
NO962274L NO962274A NO962274A NO962274L NO 962274 L NO962274 L NO 962274L NO 962274 A NO962274 A NO 962274A NO 962274 A NO962274 A NO 962274A NO 962274 L NO962274 L NO 962274L
Authority
NO
Norway
Prior art keywords
sound
propagation
boundary layers
different
substances
Prior art date
Application number
NO962274A
Other languages
Norwegian (no)
Other versions
NO962274D0 (en
Inventor
Matti Nissinen
Original Assignee
Acutest Oy
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 Acutest Oy filed Critical Acutest Oy
Publication of NO962274D0 publication Critical patent/NO962274D0/en
Publication of NO962274L publication Critical patent/NO962274L/en

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
    • G01F23/2962—Measuring transit time of reflected waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F22/00—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
    • 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
    • G01F23/2961—Acoustic waves for discrete levels
    • 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
    • G01F23/0023—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 with a probe suspended by a wire or thread

Abstract

En målingsmetode basert på forplantningshastigheten til lyd kan brukes for lett og sikkert å detektere grensesjikt mellom substanser som har forskjellig lydforplantnings-. hasigheter i lukkede tanker. Framgangsmåten anvender en tidligere kjent lydsending og -mottaksmetode, så som NDT. Ved en transducer (3) ved apparatet blir et lydsignal sendt og mottatt gjennom legemet (2) av tanken til en stopper (1), forplantningshatigheten til lyden reflektert tilbake fra denne blir registrert på en displayenhet (4) der det er mulig å merke tidsforskjellene basert på lydforplantningshastigheten som er karakteristisk for forskjellige substanser. I samsvar med tidsforskjellen kan posisjonen til grensesjiktet bestemmes nøyaktig når transduceren beveges på tvers av grensesjiktene. Målemetoden kan anvendes for definerte grensesjikt for alle forskjellige substanser, forutsatt at de har forskjellig forplantningshastighet for lyd.A measurement method based on the propagation speed of sound can be used to easily and safely detect boundary layers between substances having different sound propagation. speeds in closed thoughts. The method uses a prior art audio transmission and reception method, such as NDT. At a transducer (3) at the apparatus, an audible signal is sent and received through the body (2) of the tank to a stop (1), the propagation rate of the sound reflected back from it is recorded on a display unit (4) where it is possible to mark the time differences based on the rate of sound propagation characteristic of different substances. In accordance with the time difference, the position of the boundary layer can be accurately determined when the transducer is moved across the boundary layers. The measurement method can be used for defined boundary layers for all different substances, provided they have different propagation rates for sound.

NO962274A 1995-06-07 1996-06-03 Method and apparatus for detecting boundary layers NO962274L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI952784A FI97829C (en) 1995-06-07 1995-06-07 Measurement method and equipment for determining interfaces

Publications (2)

Publication Number Publication Date
NO962274D0 NO962274D0 (en) 1996-06-03
NO962274L true NO962274L (en) 1996-12-09

Family

ID=8543554

Family Applications (1)

Application Number Title Priority Date Filing Date
NO962274A NO962274L (en) 1995-06-07 1996-06-03 Method and apparatus for detecting boundary layers

Country Status (4)

Country Link
FI (1) FI97829C (en)
FR (1) FR2735228B1 (en)
GB (1) GB2301890A (en)
NO (1) NO962274L (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005054203A1 (en) * 2005-11-14 2007-05-16 Siemens Ag Device for determining the position of at least one phase boundary by evaluation of sound signals
US20070255458A1 (en) * 2006-04-28 2007-11-01 Haslem Keith R System and method for managing stratified liquids in storage tanks
WO2007142933A2 (en) * 2006-05-31 2007-12-13 Giraffe Liquid Management Systems, Inc. Liquid level detectors and systems for use
GB2472083A (en) * 2009-07-24 2011-01-26 Wayne Rudd Apparatus and methods for determining the location of an interface in a medium

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1361052A (en) * 1971-07-09 1974-07-24 Radun Controls Ltd Transducer devices
DE2508297A1 (en) * 1975-02-26 1976-09-09 Interatom ULTRASONIC LEVEL SENSOR FOR LIQUIDS AND THEIR APPLICATION
NO150532C (en) * 1981-05-22 1984-10-31 Bjoern R Hope DEVICE FOR LEVELS.
FR2540247B1 (en) * 1983-01-31 1985-09-27 Elf France METHOD AND APPARATUS FOR DETECTING CHANGES IN COMPOSITION WITHIN A MEDIUM USING ULTRASOUND
DE4011923A1 (en) * 1990-04-12 1991-10-17 Blohm & Voss Int METHOD FOR DETECTING PHASE INTERFACES OR LAYERS OF DIFFERENT IMMiscible LIQUIDS, SEPARATELY SEPARATING LIQUIDS
FR2661001A1 (en) * 1991-04-11 1991-10-18 Blohm & Voss Int Method for detecting boundary surfaces of immiscible liquid phases
CN1045658C (en) * 1991-07-29 1999-10-13 基·雷/森索尔有限公司 Time gate ultrasonic sensor and method
DE9215290U1 (en) * 1991-11-13 1993-03-18 Hurth Getriebe Und Zahnraeder Gmbh, 8000 Muenchen, De

Also Published As

Publication number Publication date
NO962274D0 (en) 1996-06-03
FR2735228A1 (en) 1996-12-13
GB2301890A (en) 1996-12-18
GB9611346D0 (en) 1996-08-07
FI952784A0 (en) 1995-06-07
FI97829B (en) 1996-11-15
FR2735228B1 (en) 1997-10-31
FI97829C (en) 1997-02-25

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