DE10258598A1 - Liquid material characteristic value determination device comprises one or more ultrasonic transducers for making precise time of flight measurements within measurement tubes in order to determine material characteristics - Google Patents

Liquid material characteristic value determination device comprises one or more ultrasonic transducers for making precise time of flight measurements within measurement tubes in order to determine material characteristics Download PDF

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Publication number
DE10258598A1
DE10258598A1 DE2002158598 DE10258598A DE10258598A1 DE 10258598 A1 DE10258598 A1 DE 10258598A1 DE 2002158598 DE2002158598 DE 2002158598 DE 10258598 A DE10258598 A DE 10258598A DE 10258598 A1 DE10258598 A1 DE 10258598A1
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Prior art keywords
sound
material properties
liquids
liquid
characteristic value
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DE2002158598
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German (de)
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Martin Graute
Klaus Röhl
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Priority to DE2002158598 priority Critical patent/DE10258598A1/en
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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/02—Analysing fluids
    • G01N29/032—Analysing fluids by measuring attenuation of acoustic waves
    • 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
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/02—Analysing fluids
    • G01N29/024—Analysing fluids by measuring propagation velocity or propagation time of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/32—Arrangements for suppressing undesired influences, e.g. temperature or pressure variations, compensating for signal noise
    • G01N29/326—Arrangements for suppressing undesired influences, e.g. temperature or pressure variations, compensating for signal noise compensating for temperature variations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02818—Density, viscosity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02836—Flow rate, liquid level

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

Device for determining material characteristic values and or changes therein comprises a single or multiple ultrasonic transducer system for coupling sound signals into or out of a sound guidance system that comprises one or more sound tubes with one or more reference markers and one or more temperature sensors.

Description

Schallwellen werden zur Messung von Entfernungen in Flüssigkeiten eingesetzt. Gemessen werden Pulslaufzeiten von Schallimpulsen vom Zeitpunkt des Sendens des Schallimpulses bis zum Empfang der Echos, die durch Reflektion des Schallimpulses an Referenzmarken, an Grenzflächen, an der Oberfläche oder an anderen Objekten in der Flüssigkeit erzeugt werden.Sound waves are used to measure Distances in liquids used. Pulse transit times of sound impulses are measured by Time of transmission of the sound pulse until reception of the echoes, caused by reflection of the sound pulse at reference marks, at interfaces, at the surface or on other objects in the liquid.

Sehr präzise Entfernungsmessungen in Flüssigkeiten werden erreicht, wenn die Entfernungsmessung in einem in der Flüssigkeit befindlichen Schallführungsrohr mit mindestens einer definierten Referenzmarke und mit einem Temperatursensor zur Ermittlung des Temperaturgradienten in der Flüssigkeit erfolgt.Very precise distance measurements in liquids are achieved when the distance measurement in one in the liquid located sound guide tube with at least one defined reference mark and with a temperature sensor to determine the temperature gradient in the liquid he follows.

Neuerungeninnovations

Die Vorrichtung für den Einsatz in stationären und mobilen Tanks/Behältern (1) besteht aus dem Ultraschallmeßsystem (3) mit einem oder mehreren Ultraschallwandler(n) (5), aus dem Schallführungssystem (9) mit einem oder mehreren Schallführungsrohr(en) mit einer oder mehreren Referenzmarke(n) (11) und mit einem oder mehreren Temperatursensoren) (7) sowie aus einer Steuer-, Mess- und Auswerteelektronik (2). Das Verfahren ermöglicht neben der Messung der Höhe (Füllstand), der Sumpfhöhe und der Temperatur der Flüssigkeit, insbesondere die Messung von Pulslaufzeiten, Schallgeschwindigkeit in der Flüssigkeit und der Pulsdämpfung, Schalldämpfung durch die Flüssigkeit für die Ermittlung von 'Stoffkennwerten' bzw. die Ermittlung der Änderung von 'Stoffkennwerten' der Flüssigkeit. Aus der Messung von Pulslaufzeiten, Schallgeschwindigkeiten in Teilstrecken der Messstrecke können Durchschnittstemperatur und Durchschnittsdichte der Flüssigkeit ermittelt werden.The device for use in stationary and mobile tanks / containers ( 1 ) consists of the ultrasonic measuring system ( 3 ) with one or more ultrasonic transducers (s) ( 5 ), from the sound guidance system ( 9 ) with one or more sound guide tube (s) with one or more reference mark (s) ( 11 ) and with one or more temperature sensors) ( 7 ) as well as control, measurement and evaluation electronics ( 2 ). In addition to measuring the height (level), the sump height and the temperature of the liquid, the method enables in particular the measurement of pulse transit times, speed of sound in the liquid and pulse damping, sound damping by the liquid for the determination of 'material properties' or the determination of Change of 'material properties' of the liquid. The average temperature and average density of the liquid can be determined from the measurement of pulse transit times and sound speeds in sections of the measuring section.

Insbesondere gilt, dass

  • – aus der gemessenen Schallgeschwindigkeit bzw. Änderung der Schallgeschwindigkeit die Dichte bzw. die Änderung der Dichte von definierten Flüssigkeiten unter Nutzung ergänzender Variablen aus Referenztabellen ermittelt bzw. berechnet werden kann.
  • – aus der Pulsform und der gemessenen Schalldämpfung bzw. Änderung der Schalldämpfung die Viskosität bzw. die Änderung der Viskosität der Flüssigkeit unter Nutzung weiterer Variablen aus Referenztabellen ermittelt bzw. berechnet werden kann.
In particular, that
  • - The density or the change in the density of defined liquids can be determined or calculated from the measured speed of sound or change in the speed of sound using supplementary variables from reference tables.
  • - The viscosity or the change in the viscosity of the liquid can be determined or calculated from the pulse shape and the measured sound attenuation or change in sound attenuation using further variables from reference tables.

Durch die Ermittlung der Dichte und der Viskosität einer Flüssigkeit sind Stoffkennwerte (Dichte, Viskosität) einer definierten Flüssigkeit oder definierten Flüssigkeitsgruppe eindeutig bestimmt. Weitere Stoffkennwerte der jeweiligen Flüssigkeit lassen sich aus Referenztabellen ableiten (Änderung des Alkoholgehaltes von Spirituosen während des Brennprozesses, Fettgehalt der Milch etc.).By determining the density and the viscosity a liquid are material properties (density, viscosity) of a defined liquid or defined fluid group clearly determined. Further material properties of the respective liquid can be derived from reference tables (change in alcohol content of spirits during of the distilling process, fat content of the milk etc.).

Claims (5)

Vorrichtung zur Ermittlung von Stoffkennwerten und/oder Änderung von Stoffkennwerten von Flüssigkeiten, bestehend aus einem einfach- oder mehrfach-Ultraschallwandlersystem zur Ein-/Auskopplung der Ultraschallsignale im Schallführungssystem, bestehend aus einem oder mehreren Schallrohr(en) mit einer oder mehreren Referenzmarke(n) und einen oder mehreren Temperatursensor(en).Device for determining material properties and / or change of material properties of liquids, consisting of a single or multiple ultrasonic transducer system for coupling / decoupling the ultrasound signals in the sound guidance system, consisting of one or more sound tube (s) with one or several reference mark (s) and one or more temperature sensor (s). Vorrichtung zur Ermittlung von Stoffkennwerten und/oder Änderung von Stoffkennwerten von Flüssigkeiten, dadurch gekennzeichnet, dass die Mess-/Auswerteelektronik mit Schaltungen zur Messung von Pulslaufzeit/Schallgeschwindigkeit und Pulsform/Schalldämpfung versehen ist.Device for determining material properties and / or changes of material properties of liquids, characterized in that the measurement / evaluation electronics with circuits for measuring the pulse duration / speed of sound and pulse shape / sound attenuation is. Verfahren zur Ermittlung von Stoffkennwerten und/oder Änderung von Stoffkennwerten von Flüssigkeiten, dadurch gekennzeichnet, dass aus der gemessenen Schallgeschwindigkeit die Dichte von Flüssigkeiten berechnet bzw. aus Referenztabellen ermittelt werden kann.Procedure for determining substance parameters and / or changes of material properties of liquids, characterized in that from the measured speed of sound the density of liquids can be calculated or determined from reference tables. Vorrichtung zur Ermittlung von Stoffkennwerten und/oder Änderung von Stoffkennwerten von Flüssigkeiten, dadurch gekennzeichnet, dass aus der Pulsform und der gemessenen Schalldämpfung die Viskosität der Flüssigkeit aus Referenztabellen bestimmt wird.Device for determining material properties and / or changes of material properties of liquids, characterized in that from the pulse shape and the measured soundproofing the viscosity the liquid is determined from reference tables. Verfahren nach Anspruch 3 und 4, dadurch gekennzeichnet, daß die Dichte der Flüssigkeit aus Pulslaufzeit/Schallgeschwindigkeit und Pulsform/Schalldämpfung berechnet wird.A method according to claim 3 and 4, characterized in that the Density of liquid calculated from pulse duration / speed of sound and pulse shape / sound attenuation becomes.
DE2002158598 2002-12-14 2002-12-14 Liquid material characteristic value determination device comprises one or more ultrasonic transducers for making precise time of flight measurements within measurement tubes in order to determine material characteristics Withdrawn DE10258598A1 (en)

Priority Applications (1)

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DE2002158598 DE10258598A1 (en) 2002-12-14 2002-12-14 Liquid material characteristic value determination device comprises one or more ultrasonic transducers for making precise time of flight measurements within measurement tubes in order to determine material characteristics

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DE2002158598 DE10258598A1 (en) 2002-12-14 2002-12-14 Liquid material characteristic value determination device comprises one or more ultrasonic transducers for making precise time of flight measurements within measurement tubes in order to determine material characteristics

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DE10258598A1 true DE10258598A1 (en) 2004-06-24

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018213853A1 (en) * 2018-08-17 2020-02-20 Zf Friedrichshafen Ag Level measuring system
US11280390B2 (en) 2018-08-09 2022-03-22 Zf Active Safety Gmbh Vehicle device with a spindle/nut arrangement and with an anti-rotation device and method for mounting an anti-rotation device for the manufacture of such a vehicle device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11280390B2 (en) 2018-08-09 2022-03-22 Zf Active Safety Gmbh Vehicle device with a spindle/nut arrangement and with an anti-rotation device and method for mounting an anti-rotation device for the manufacture of such a vehicle device
DE102018213853A1 (en) * 2018-08-17 2020-02-20 Zf Friedrichshafen Ag Level measuring system
US11150123B2 (en) 2018-08-17 2021-10-19 Zf Friedrichshafen Ag System for measuring a filling level

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