DE69300128D1 - Verfahren und Vorrichtung zur Flüssigkeitsoberflächenermittlung unter Anwendung eines Ultraschallwandlers. - Google Patents
Verfahren und Vorrichtung zur Flüssigkeitsoberflächenermittlung unter Anwendung eines Ultraschallwandlers.Info
- Publication number
- DE69300128D1 DE69300128D1 DE69300128T DE69300128T DE69300128D1 DE 69300128 D1 DE69300128 D1 DE 69300128D1 DE 69300128 T DE69300128 T DE 69300128T DE 69300128 T DE69300128 T DE 69300128T DE 69300128 D1 DE69300128 D1 DE 69300128D1
- Authority
- DE
- Germany
- Prior art keywords
- determining
- ultrasonic transducer
- liquid surface
- liquid
- transducer
- 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.)
- Expired - Fee Related
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
-
- 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
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Automatic Analysis And Handling Materials Therefor (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/917,205 US5428997A (en) | 1992-07-20 | 1992-07-20 | Method of and device for fluid surface detection using an ultrasonic transducer |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69300128D1 true DE69300128D1 (de) | 1995-06-01 |
DE69300128T2 DE69300128T2 (de) | 1995-09-28 |
Family
ID=25438487
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69300128T Expired - Fee Related DE69300128T2 (de) | 1992-07-20 | 1993-07-16 | Verfahren und Vorrichtung zur Flüssigkeitsoberflächenermittlung unter Anwendung eines Ultraschallwandlers. |
Country Status (6)
Country | Link |
---|---|
US (1) | US5428997A (de) |
EP (1) | EP0580483B1 (de) |
JP (1) | JPH06167375A (de) |
AU (1) | AU669175B2 (de) |
CA (1) | CA2100807A1 (de) |
DE (1) | DE69300128T2 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9408176D0 (en) * | 1994-04-25 | 1994-06-15 | Interface Devices Distribution | Fluid level detectors |
DE69612777T2 (de) * | 1995-03-15 | 2002-04-18 | Sanyo Electric Co | Ultraschallsensor und Pipettiervorrichtung, die diesen verwendet |
DE19720519C2 (de) * | 1997-05-16 | 2000-03-30 | Pepperl & Fuchs | Vorrichtung zur Feststellung und/oder Überwachung eines Füllstandes eines Mediums in einem Behälter |
US6604054B2 (en) | 2000-02-29 | 2003-08-05 | Gen-Probe, Inc. | Method of detecting fluid flow through a conduit |
DE10132530A1 (de) * | 2001-07-09 | 2003-01-30 | Evotec Ag | Verfahren zur Überwachung der Funktionsfähigkeit einer Flüssigkeitsfördervorrichtung und Flüssigkeitsfördervorrichtung |
DE10242970A1 (de) * | 2002-09-17 | 2004-04-01 | Vega Grieshaber Kg | Vibrations-Füllstandssensor |
DE10360526A1 (de) | 2003-12-22 | 2005-07-14 | Roche Diagnostics Gmbh | Reagenzkassette mit Reagenzbehälter für partikelhaltiges Reagenz für dessen noninvasive Homogenisierung |
DE102008009626A1 (de) | 2008-02-18 | 2009-08-27 | Advalytix Ag | Verfahren zur Zustandsüberprüfung einer Pipette, Pipettierverfahren, Pipettiervorrichtung und Saugrohr für eine Pipettiervorrichtung |
US7804599B2 (en) * | 2008-07-24 | 2010-09-28 | MGM Instruments, Inc. | Fluid volume verification system |
US10072927B2 (en) | 2016-01-07 | 2018-09-11 | Rarecyte, Inc. | Detecting a substrate |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5610792A (en) * | 1979-07-06 | 1981-02-03 | Taga Denki Kk | Method and circuit for driving ultrasonic-wave converter |
GB2084322B (en) * | 1980-09-18 | 1984-08-30 | Avery Hardoll Ltd | Fluid measuring system |
US4540981A (en) * | 1981-10-29 | 1985-09-10 | Edo Western Corporation | Method and apparatus for detecting the presence of liquid |
JPS5916572A (ja) * | 1982-07-21 | 1984-01-27 | 多賀電気株式会社 | 超音波変換器駆動装置の駆動周波数制御方法 |
WO1984003828A1 (en) * | 1983-04-04 | 1984-10-11 | Sumitomo Bakelite Co | Ultrasonic oscillator |
US4445064A (en) * | 1983-04-25 | 1984-04-24 | E. I. Du Pont De Nemours And Company | Self resonant power supply for electro-acoustical transducer |
US4578650A (en) * | 1983-06-15 | 1986-03-25 | Watson Industries, Inc. | Resonance drive oscillator circuit |
US4641053A (en) * | 1984-08-14 | 1987-02-03 | Matsushita Seiko Co., Ltd. | Ultrasonic liquid atomizer with an improved soft start circuit |
EP0209872A3 (de) * | 1985-07-22 | 1988-07-27 | E.I. Du Pont De Nemours And Company | Verfahren und Gerät zur Grenzschichtdetektion mittels Ultraschall |
JPS62294915A (ja) * | 1986-06-13 | 1987-12-22 | Matsushita Electric Ind Co Ltd | 水位検知装置 |
US4754186A (en) * | 1986-12-23 | 1988-06-28 | E. I. Du Pont De Nemours And Company | Drive network for an ultrasonic probe |
NL8801836A (nl) * | 1988-07-20 | 1990-02-16 | Enraf Nonius Delft | Inrichting voor het bepalen van het niveau van het grensvlak tussen een eerste en een tweede medium in een reservoir. |
US4937466A (en) * | 1988-09-29 | 1990-06-26 | Ball Corporation | Remote as signal attenuator |
US4977786A (en) * | 1990-01-18 | 1990-12-18 | E. I. Du Pont De Nemours And Company | Capacitive liquid level sensor |
-
1992
- 1992-07-20 US US07/917,205 patent/US5428997A/en not_active Expired - Lifetime
-
1993
- 1993-07-14 AU AU41924/93A patent/AU669175B2/en not_active Ceased
- 1993-07-16 DE DE69300128T patent/DE69300128T2/de not_active Expired - Fee Related
- 1993-07-16 EP EP93401845A patent/EP0580483B1/de not_active Expired - Lifetime
- 1993-07-19 CA CA002100807A patent/CA2100807A1/en not_active Abandoned
- 1993-07-19 JP JP5177902A patent/JPH06167375A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
JPH06167375A (ja) | 1994-06-14 |
AU4192493A (en) | 1994-01-27 |
DE69300128T2 (de) | 1995-09-28 |
CA2100807A1 (en) | 1994-01-21 |
EP0580483B1 (de) | 1995-04-26 |
AU669175B2 (en) | 1996-05-30 |
EP0580483A1 (de) | 1994-01-26 |
US5428997A (en) | 1995-07-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |