ATE18799T1 - Verfahren und vorrichtung zur feststellung des vorhandenseins einer fluessigkeit. - Google Patents
Verfahren und vorrichtung zur feststellung des vorhandenseins einer fluessigkeit.Info
- Publication number
- ATE18799T1 ATE18799T1 AT82105833T AT82105833T ATE18799T1 AT E18799 T1 ATE18799 T1 AT E18799T1 AT 82105833 T AT82105833 T AT 82105833T AT 82105833 T AT82105833 T AT 82105833T AT E18799 T1 ATE18799 T1 AT E18799T1
- Authority
- AT
- Austria
- Prior art keywords
- rod
- liquid
- container
- electrical signals
- piezo
- Prior art date
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
-
- 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)
- 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)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- External Artificial Organs (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/316,506 US4540981A (en) | 1981-10-29 | 1981-10-29 | Method and apparatus for detecting the presence of liquid |
EP82105833A EP0079422B1 (de) | 1981-10-29 | 1982-06-30 | Verfahren und Vorrichtung zur Feststellung des Vorhandenseins einer Flüssigkeit |
Publications (1)
Publication Number | Publication Date |
---|---|
ATE18799T1 true ATE18799T1 (de) | 1986-04-15 |
Family
ID=23229338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT82105833T ATE18799T1 (de) | 1981-10-29 | 1982-06-30 | Verfahren und vorrichtung zur feststellung des vorhandenseins einer fluessigkeit. |
Country Status (7)
Country | Link |
---|---|
US (1) | US4540981A (de) |
EP (1) | EP0079422B1 (de) |
JP (1) | JPS5883221A (de) |
AT (1) | ATE18799T1 (de) |
AU (1) | AU551048B2 (de) |
CA (1) | CA1204850A (de) |
DE (2) | DE79422T1 (de) |
Families Citing this family (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5155472A (en) * | 1983-07-29 | 1992-10-13 | Introtek International, Inc. | Contact type liquid level sensing system |
US4628951A (en) * | 1984-01-03 | 1986-12-16 | Chemical Data Systems, Inc. | Liquid level detection system for high temperature or pressure environments |
FR2572519B1 (fr) * | 1984-10-25 | 1989-09-22 | Jaeger | Detecteur de niveau a transducteur electro-mecanique |
EP0209872A3 (de) * | 1985-07-22 | 1988-07-27 | E.I. Du Pont De Nemours And Company | Verfahren und Gerät zur Grenzschichtdetektion mittels Ultraschall |
US4644789A (en) * | 1985-12-20 | 1987-02-24 | Clevite Industries Inc. | Liquid level indicator system |
DE3619678A1 (de) * | 1986-06-11 | 1987-12-17 | Eberhard Hermann | Fuellstandskontrollgeraet |
US4740726A (en) * | 1986-07-21 | 1988-04-26 | Nohken Inc. | Vibrator-type level sensor |
US4754186A (en) * | 1986-12-23 | 1988-06-28 | E. I. Du Pont De Nemours And Company | Drive network for an ultrasonic probe |
US4727277A (en) * | 1987-01-09 | 1988-02-23 | Tello Adams | Electronic bubble detector apparatus |
DE3740598C2 (de) * | 1987-11-30 | 1998-03-26 | Grieshaber Vega Kg | Schwingeinheit für Füllstand-Vibrations-Grenzschalter |
US5121631A (en) * | 1988-10-11 | 1992-06-16 | Euromart Corporation | Shielded level sensing system |
JP3008991B2 (ja) * | 1991-02-14 | 2000-02-14 | 株式会社ノーケン | 振動式レベル検出装置 |
US5483226A (en) * | 1991-04-11 | 1996-01-09 | Menut; Jean-Baptiste | Ultrasonic detector, detection method for liquid media and ultrasonic transmitter control method |
GB2268807B (en) * | 1992-07-17 | 1996-09-18 | Xerox Corp | Detection of material consumption |
US5428997A (en) * | 1992-07-20 | 1995-07-04 | Pasteur Sanofi Diagnostics | Method of and device for fluid surface detection using an ultrasonic transducer |
DE4232659C2 (de) * | 1992-09-29 | 1996-07-25 | Endress Hauser Gmbh Co | Vorrichtung zur Feststellung und/oder Überwachung eines vorbestimmten Füllstands in einem Behälter |
US5267474A (en) * | 1992-10-23 | 1993-12-07 | Kohler Co. | Liquid-level sensor |
US5644299A (en) * | 1993-07-29 | 1997-07-01 | Bindicator Company | Ultrasonic material level measurement |
US5438230A (en) * | 1994-02-28 | 1995-08-01 | Motorola, Inc. | Piezoelectric material detector |
US5578994A (en) * | 1994-05-25 | 1996-11-26 | Milltronics Ltd. | Liquid level switch |
DE4419617C2 (de) * | 1994-06-03 | 1998-07-02 | Endress Hauser Gmbh Co | Anordnung zur Feststellung und/oder Überwachung eines vorbestimmten Füllstands in einem Behälter |
EP0762088A3 (de) * | 1995-09-11 | 1997-11-05 | Georg Fischer Rohrleitungssysteme AG | Verfahren und Vorrichtung zur Grenzstanderfassung von Flüssigkeiten und Schüttgütern |
GB2306003B (en) * | 1995-10-02 | 1999-09-29 | Federal Ind Ind Group Inc | Level detector for solids |
US5895848A (en) * | 1996-01-16 | 1999-04-20 | Flowline Inc. | Apparatus and method for level sensing in a container |
GB9610831D0 (en) * | 1996-05-23 | 1996-07-31 | Amp Great Britain | Piezoelectric sensor |
DE19621449C2 (de) * | 1996-05-29 | 2000-11-30 | Grieshaber Vega Kg | Vibrationsresonator, Verfahren zum Betreiben eines solchen Vibrationsresonators und Vibrations-Füllstand-Grenzschalter mit einem solchen Vibrationsresonator |
US5866426A (en) * | 1996-12-17 | 1999-02-02 | Akzo Nobel N.V. | Device and method for determining liquid-probe contact |
US5943294A (en) * | 1997-04-08 | 1999-08-24 | Milltronics Ltd. | Level detector for fluent material |
DE19714973C2 (de) * | 1997-04-10 | 1999-02-11 | Endress Hauser Gmbh Co | Verfahren und Anordnung zur Feststellung einer Überfüllung bei der Messung des Füllstands einer Flüssigkeit in einem Behälter nach dem Impulslaufzeitverfahren |
US6138507A (en) * | 1997-04-30 | 2000-10-31 | Endress + Hauser Gmbh + Co. | Apparatus for establishing and/or monitoring a predetermined filling level in a container through controlled transducer phase and impedance |
US5932953A (en) * | 1997-06-30 | 1999-08-03 | Iowa State University Research Foundation, Inc. | Method and system for detecting material using piezoelectric resonators |
DE10131081A1 (de) * | 2001-06-27 | 2003-01-09 | Endress & Hauser Gmbh & Co Kg | Vorrichtung zur Bestimmung und/oder Überwachung des Füllstandes eines Mediums in einem Behälter |
US6931929B2 (en) * | 2002-04-10 | 2005-08-23 | Akebono Brake Industry Co., Ltd. | Filler detection method and filler detection device |
DE10242970A1 (de) * | 2002-09-17 | 2004-04-01 | Vega Grieshaber Kg | Vibrations-Füllstandssensor |
JP4497370B2 (ja) * | 2005-05-31 | 2010-07-07 | 日本碍子株式会社 | 微小物体の飛翔状態検出装置、及び微小物体の飛翔状態検出方法 |
US7849738B2 (en) * | 2006-03-13 | 2010-12-14 | Sonoplot, Inc. | Device for detecting interaction with an object |
DE102008054945A1 (de) | 2008-12-19 | 2010-06-24 | Endress + Hauser Gmbh + Co. Kg | Vorrichtung zur Bestimmung und/oder Überwachung einer Prozessgröße |
CN112082145A (zh) * | 2020-08-04 | 2020-12-15 | 华帝股份有限公司 | 一种蒸发器的缺水检测方法及缺水检测电路 |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR923089A (fr) * | 1945-09-08 | 1947-06-26 | Liquidometer Corp | Perfectionnements aux émetteurs pour dispositif de mesure |
DE1042251B (de) * | 1953-06-11 | 1958-10-30 | Karl Eduard Hannemann Reglerba | Vorrichtung zum Abtasten des Fluessigkeitsstandes in Behaeltern |
FR1162312A (fr) * | 1956-11-09 | 1958-09-11 | Dispositif détecteur perfectionné | |
US3013256A (en) * | 1957-05-01 | 1961-12-12 | Acoustica Associates Inc | Electronic apparatus for sensing the presence or absence of material |
US3050720A (en) * | 1958-12-17 | 1962-08-21 | Gen Ultrasonics Company | System for sensing a change in an ambient condition |
US3163843A (en) * | 1961-10-02 | 1964-12-29 | North American Aviation Inc | Liquid level indicator |
US3283181A (en) * | 1963-03-08 | 1966-11-01 | Jaeger Machine Co | Electromechanical transducer |
US3256738A (en) * | 1963-05-23 | 1966-06-21 | Simmonds Precision Products | Magnetostrictive transducer |
US3266311A (en) * | 1964-05-12 | 1966-08-16 | Delavan Mfg Company Inc | Cryogenic liquid level sensing apparatus |
CH424295A (de) * | 1965-02-12 | 1966-11-15 | Knorr Naehrmittel Ag | Niveauanzeigegerät für Flüssigkeiten und Schüttgüter |
FR1545598A (fr) * | 1967-05-26 | 1968-11-15 | Monsieur Le Ministre Des Armee | Détecteur de niveau à lame vibrante pour liquides |
JPS4919844A (de) * | 1972-06-13 | 1974-02-21 | ||
JPS5212860A (en) * | 1975-07-21 | 1977-01-31 | Sanko Kuki Sochi Kk | Level detector |
US4008613A (en) * | 1975-10-03 | 1977-02-22 | Ludlow Industries, Inc. | Vibratory bin level indicators |
JPS557861U (de) * | 1978-06-28 | 1980-01-18 | ||
JPS5536874A (en) * | 1978-09-08 | 1980-03-14 | Konishiroku Photo Ind Co Ltd | Detection method for toner remainder |
JPS55146014A (en) * | 1979-05-02 | 1980-11-14 | Konishiroku Photo Ind Co Ltd | Detector for remaining amount of toner |
GB2054853B (en) * | 1979-07-12 | 1983-06-29 | Bestobell Mobrey Ltd | Device for sensing the presence of contents at a certain level in a container |
DE2949162A1 (de) * | 1979-12-06 | 1981-06-11 | Endress U. Hauser Gmbh U. Co, 7867 Maulburg | Vorrichtung zur feststellung eines vorbestimmten fuellstandes |
-
1981
- 1981-10-29 US US06/316,506 patent/US4540981A/en not_active Expired - Fee Related
-
1982
- 1982-06-30 AT AT82105833T patent/ATE18799T1/de not_active IP Right Cessation
- 1982-06-30 EP EP82105833A patent/EP0079422B1/de not_active Expired
- 1982-06-30 DE DE198282105833T patent/DE79422T1/de active Pending
- 1982-06-30 DE DE8282105833T patent/DE3270086D1/de not_active Expired
- 1982-07-01 AU AU85523/82A patent/AU551048B2/en not_active Ceased
- 1982-07-06 CA CA000406648A patent/CA1204850A/en not_active Expired
- 1982-10-04 JP JP57173383A patent/JPS5883221A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
EP0079422A1 (de) | 1983-05-25 |
DE3270086D1 (en) | 1986-04-30 |
US4540981A (en) | 1985-09-10 |
JPH037244B2 (de) | 1991-02-01 |
EP0079422B1 (de) | 1986-03-26 |
JPS5883221A (ja) | 1983-05-19 |
AU551048B2 (en) | 1986-04-17 |
AU8552382A (en) | 1983-05-05 |
DE79422T1 (de) | 1983-11-10 |
CA1204850A (en) | 1986-05-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RER | Ceased as to paragraph 5 lit. 3 law introducing patent treaties |