DK0757784T3 - Piezoelektriske følersystemer - Google Patents
Piezoelektriske følersystemerInfo
- Publication number
- DK0757784T3 DK0757784T3 DK95916761T DK95916761T DK0757784T3 DK 0757784 T3 DK0757784 T3 DK 0757784T3 DK 95916761 T DK95916761 T DK 95916761T DK 95916761 T DK95916761 T DK 95916761T DK 0757784 T3 DK0757784 T3 DK 0757784T3
- Authority
- DK
- Denmark
- Prior art keywords
- piezoelectric sensor
- sensor systems
- sensing element
- resonant frequency
- piezoelectric
- 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
- 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
-
- 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
- G01F23/2968—Transducers specially adapted for acoustic level indicators
-
- 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
- G01N29/036—Analysing fluids by measuring frequency or resonance of acoustic waves
-
- 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
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9408176A GB9408176D0 (en) | 1994-04-25 | 1994-04-25 | Fluid level detectors |
PCT/GB1995/000938 WO1995029388A1 (en) | 1994-04-25 | 1995-04-25 | Piezoelectric sensing systems |
Publications (1)
Publication Number | Publication Date |
---|---|
DK0757784T3 true DK0757784T3 (da) | 2000-03-20 |
Family
ID=10754082
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK95916761T DK0757784T3 (da) | 1994-04-25 | 1995-04-25 | Piezoelektriske følersystemer |
Country Status (13)
Country | Link |
---|---|
EP (1) | EP0757784B1 (de) |
JP (1) | JPH11503820A (de) |
KR (1) | KR970702479A (de) |
AT (1) | ATE185420T1 (de) |
AU (1) | AU2313295A (de) |
CA (1) | CA2188547A1 (de) |
DE (1) | DE69512652T2 (de) |
DK (1) | DK0757784T3 (de) |
ES (1) | ES2138733T3 (de) |
GB (2) | GB9408176D0 (de) |
NO (1) | NO964523L (de) |
WO (1) | WO1995029388A1 (de) |
ZA (1) | ZA953346B (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6044694A (en) * | 1996-08-28 | 2000-04-04 | Videojet Systems International, Inc. | Resonator sensors employing piezoelectric benders for fluid property sensing |
DE19720519C2 (de) * | 1997-05-16 | 2000-03-30 | Pepperl & Fuchs | Vorrichtung zur Feststellung und/oder Überwachung eines Füllstandes eines Mediums in einem Behälter |
DE19933043B4 (de) * | 1999-07-15 | 2005-07-28 | Siemens Ag | Füllstandsgeber für einen Flüssigkeitsbehälter und Verfahren zur Ermittlung des Füllstandes in einem Flüssigkeitsbehälter |
DE19933044B4 (de) * | 1999-07-15 | 2005-09-01 | Siemens Ag | Füllstandsgeber für einen Flüssigkeitsbehälter und Verfahren zur Ermittlung des Füllstandes in einem Flüssigkeitsbehälter |
WO2002079733A1 (de) | 2001-03-28 | 2002-10-10 | Endress + Hauser Gmbh + Co. | Vorrichtung zur feststellung und/oder überwachung eines vorbestimmten füllstandes in einem behälter |
DE10153937A1 (de) * | 2001-03-28 | 2003-02-27 | Endress & Hauser Gmbh & Co Kg | Vorrichtung zur Feststellung und/oder Überwachung eines vorbestimmten Füllstandes in einem Behälter |
DE10203461A1 (de) * | 2002-01-28 | 2003-08-14 | Grieshaber Vega Kg | Schwingungsgrenzstandsensor |
DE10350331B4 (de) * | 2003-10-29 | 2006-11-09 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Schaltungsanordnung und Verfahren zur Ausgabe von Analogsignalen durch einen Mikroprozessor |
EP2151672A1 (de) * | 2008-08-08 | 2010-02-10 | VEGA Grieshaber KG | Verfahren zum Messen eines Füllstands oder Grenzstands, Füllstand- oder Grenzstandmessgeräte-Schaltung und Füllstand- oder Grenzstandmessgerät |
US20130220013A1 (en) * | 2009-12-17 | 2013-08-29 | Bae Systems Plc | Sensors |
EP2341323A1 (de) * | 2009-12-17 | 2011-07-06 | BAE Systems PLC | Sensoren |
US9179843B2 (en) | 2011-04-21 | 2015-11-10 | Hassan Ghaderi MOGHADDAM | Method and system for optically evaluating proximity to the inferior alveolar nerve in situ |
DE102011075113A1 (de) | 2011-05-03 | 2012-11-08 | Endress + Hauser Gmbh + Co. Kg | Vorrichtung und Verfahren zum Betreiben einer Vorrichtung zur Bestimmung und/oder Überwachung mindestens einer physikalischen Prozessgröße |
EP3214424A1 (de) * | 2016-03-04 | 2017-09-06 | Buira Nunez, Ernest | Detektionsvorrichtung, system und verfahren zur messung von flüssigkeitseigenschaften einschliesslich viskosität und/oder dichte |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2632632A1 (de) * | 1976-07-20 | 1978-01-26 | Ici Ltd | Verfahren und geraet zur ueberwachung von parametern |
FR2436372A1 (fr) * | 1978-09-13 | 1980-04-11 | Cit Alcatel | Dispositif de controle du niveau d'un materiau fluide contenu dans un reservoir vertical |
DE3314872A1 (de) * | 1983-04-25 | 1984-10-25 | Vdo Adolf Schindling Ag, 6000 Frankfurt | Einrichtung zur meldung des fuellstandes an dem ort eines sensors |
US5428997A (en) * | 1992-07-20 | 1995-07-04 | Pasteur Sanofi Diagnostics | Method of and device for fluid surface detection using an ultrasonic transducer |
-
1994
- 1994-04-25 GB GB9408176A patent/GB9408176D0/en active Pending
-
1995
- 1995-04-25 EP EP95916761A patent/EP0757784B1/de not_active Expired - Lifetime
- 1995-04-25 AU AU23132/95A patent/AU2313295A/en not_active Abandoned
- 1995-04-25 DK DK95916761T patent/DK0757784T3/da active
- 1995-04-25 GB GB9622296A patent/GB2302178B/en not_active Expired - Lifetime
- 1995-04-25 KR KR1019960705954A patent/KR970702479A/ko not_active Application Discontinuation
- 1995-04-25 ES ES95916761T patent/ES2138733T3/es not_active Expired - Lifetime
- 1995-04-25 JP JP7527478A patent/JPH11503820A/ja active Pending
- 1995-04-25 ZA ZA953346A patent/ZA953346B/xx unknown
- 1995-04-25 CA CA002188547A patent/CA2188547A1/en not_active Abandoned
- 1995-04-25 DE DE69512652T patent/DE69512652T2/de not_active Expired - Fee Related
- 1995-04-25 AT AT95916761T patent/ATE185420T1/de not_active IP Right Cessation
- 1995-04-25 WO PCT/GB1995/000938 patent/WO1995029388A1/en active IP Right Grant
-
1996
- 1996-10-24 NO NO964523A patent/NO964523L/no not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
ES2138733T3 (es) | 2000-01-16 |
GB9622296D0 (en) | 1996-12-18 |
ZA953346B (en) | 1996-01-11 |
DE69512652T2 (de) | 2000-04-27 |
EP0757784A1 (de) | 1997-02-12 |
GB2302178B (en) | 1998-04-29 |
GB2302178A (en) | 1997-01-08 |
EP0757784B1 (de) | 1999-10-06 |
NO964523L (no) | 1996-11-14 |
AU2313295A (en) | 1995-11-16 |
ATE185420T1 (de) | 1999-10-15 |
JPH11503820A (ja) | 1999-03-30 |
WO1995029388A1 (en) | 1995-11-02 |
DE69512652D1 (de) | 1999-11-11 |
GB9408176D0 (en) | 1994-06-15 |
KR970702479A (ko) | 1997-05-13 |
NO964523D0 (no) | 1996-10-24 |
CA2188547A1 (en) | 1995-11-02 |
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