NO964523L - Fremgangsmåte for undersökelse av et medium ved hjelp av en piezoelektrisk sensor - Google Patents

Fremgangsmåte for undersökelse av et medium ved hjelp av en piezoelektrisk sensor

Info

Publication number
NO964523L
NO964523L NO964523A NO964523A NO964523L NO 964523 L NO964523 L NO 964523L NO 964523 A NO964523 A NO 964523A NO 964523 A NO964523 A NO 964523A NO 964523 L NO964523 L NO 964523L
Authority
NO
Norway
Prior art keywords
examining
medium
piezoelectric sensor
sensing element
resonant frequency
Prior art date
Application number
NO964523A
Other languages
English (en)
Other versions
NO964523D0 (no
Inventor
Ian Casselden
Original Assignee
Sensor Systems Jersey Ltd
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 Sensor Systems Jersey Ltd filed Critical Sensor Systems Jersey Ltd
Publication of NO964523D0 publication Critical patent/NO964523D0/no
Publication of NO964523L publication Critical patent/NO964523L/no

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

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Immunology (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Measuring Fluid Pressure (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Burglar Alarm Systems (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

Piezoelektrisk sensorsystem med et vibrerende piezoelektrisk sensorelement (5) som drives av et periodisk drivsignal ved eller nær elementets resonansfrekvens. Et retursignal fra sensorelementet over- våkes for å registrere en resonansfrek- vensforskyvning.
NO964523A 1994-04-25 1996-10-24 Fremgangsmåte for undersökelse av et medium ved hjelp av en piezoelektrisk sensor NO964523L (no)

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 (2)

Publication Number Publication Date
NO964523D0 NO964523D0 (no) 1996-10-24
NO964523L true NO964523L (no) 1996-11-14

Family

ID=10754082

Family Applications (1)

Application Number Title Priority Date Filing Date
NO964523A NO964523L (no) 1994-04-25 1996-10-24 Fremgangsmåte for undersökelse av et medium ved hjelp av en piezoelektrisk sensor

Country Status (13)

Country Link
EP (1) EP0757784B1 (no)
JP (1) JPH11503820A (no)
KR (1) KR970702479A (no)
AT (1) ATE185420T1 (no)
AU (1) AU2313295A (no)
CA (1) CA2188547A1 (no)
DE (1) DE69512652T2 (no)
DK (1) DK0757784T3 (no)
ES (1) ES2138733T3 (no)
GB (2) GB9408176D0 (no)
NO (1) NO964523L (no)
WO (1) WO1995029388A1 (no)
ZA (1) ZA953346B (no)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
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
US6799820B1 (en) 1999-05-20 2004-10-05 Seiko Epson Corporation Liquid container having a liquid detecting device
DE19933044B4 (de) * 1999-07-15 2005-09-01 Siemens Ag Füllstandsgeber für einen Flüssigkeitsbehälter und Verfahren zur Ermittlung des Füllstandes in einem Flüssigkeitsbehälter
DE19933043B4 (de) * 1999-07-15 2005-07-28 Siemens Ag Füllstandsgeber für einen Flüssigkeitsbehälter und Verfahren zur Ermittlung des Füllstandes in einem Flüssigkeitsbehälter
US7225670B2 (en) 2000-05-18 2007-06-05 Seiko Epson Corporation Mounting structure, module, and liquid container
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
JP2004526251A (ja) 2001-03-28 2004-08-26 エンドレス ウント ハウザー ゲーエムベーハー ウント コンパニー コマンディートゲゼルシャフト 容器内の所定の充填レベルを決定及び／又は監視する装置
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
EP2513614A1 (en) * 2009-12-17 2012-10-24 BAE Systems Plc. Sensors
EP2341323A1 (en) * 2009-12-17 2011-07-06 BAE Systems PLC Sensors
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 (en) * 2016-03-04 2017-09-06 Buira Nunez, Ernest A detection device, a system and a method for measuring fluid properties including viscosity and/or density

Family Cites Families (4)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
GB2302178B (en) 1998-04-29
AU2313295A (en) 1995-11-16
GB9622296D0 (en) 1996-12-18
DK0757784T3 (da) 2000-03-20
ZA953346B (en) 1996-01-11
EP0757784B1 (en) 1999-10-06
DE69512652T2 (de) 2000-04-27
EP0757784A1 (en) 1997-02-12
DE69512652D1 (de) 1999-11-11
ATE185420T1 (de) 1999-10-15
NO964523D0 (no) 1996-10-24
ES2138733T3 (es) 2000-01-16
CA2188547A1 (en) 1995-11-02
JPH11503820A (ja) 1999-03-30
GB2302178A (en) 1997-01-08
KR970702479A (ko) 1997-05-13
GB9408176D0 (en) 1994-06-15
WO1995029388A1 (en) 1995-11-02

Similar Documents

Publication Publication Date Title
NO964523L (no) Fremgangsmåte for undersökelse av et medium ved hjelp av en piezoelektrisk sensor
EP0740421A3 (en) Temperature compensated piezoelectric oscillator
FR2735594B1 (fr) Procede et dispositif de determination du spectre de frequence d'un signal
WO1991013832A3 (en) Method and apparatus for measuring strain
BR9503280A (pt) Sistema oscilador processo de operar oscilador e processo de controlar a frequencia de operaçao de oscilador
FR2712388B1 (fr) Procédé et dispositif pour former un signal simulé de la température des gaz d'échappement de la sonde des gaz d'échappement ou du catalyseur.
CA2238883A1 (en) Use of acoustic emission in rock formation analysis
DE3875521D1 (de) Ueberwachungssystem.
SE9704354D0 (sv) Sensor för detektering av biologiska målkomplex
DE69613613D1 (de) Ultraschallsensor und Messverfahren unter Verwendung eines derartigen Sensors
DE69608500D1 (de) Einrichtung zur Vermeidung der Fehlfunktion des Sensors in Mikrowellenöfen
GB2369678A (en) Immuno-diagnostic test method for veterinary disease
ATE164136T1 (de) Verfahren und sensorvorrichtung zur identifizierung verschiedener wasserzustände
DK0953829T3 (da) Fremgangsmåde til akustisk overvågning af forlöbet af en malkeproces
EP0827218A4 (en) Piezoelectric device and method of its driving
FR2731129B1 (fr) Procede et dispositif pour diminuer la frequence de resonance des cavites des transducteurs immergeables
FR2700220B1 (fr) Procédé pour polariser au moins une zone d'une feuille de matériau ferroélectrique, et procédé pour réaliser un élément polarisé pour capteur piézoélectrique ou pyroélectrique.
FR2686412B1 (fr) Capteur piezoelectrique compense en temperature.
EP1174835A3 (en) Audible warning devices
FR2742951B1 (fr) Procede et dispositif pour detecter la presence d'un signal periodique de periode connue
FR2669426B1 (fr) Transducteur de force a poutre vibrante piezoelectrique pour capteur accelerometrique.
KR940025308U (ko) 압력센서의 초기 발진주파수 조절장치
FR2737825B1 (fr) Procede d'exploitation du signal de sortie d'un capteur ou d'un convertisseur recevant une energie impulsionnelle intermittente, et dispositif de mise en oeuvre
FR2751776B1 (fr) Procede d'extraction de la frequence fondamentale d'un signal de parole
SE0000797D0 (sv) Method for excitation and detection of resonant sensors

Legal Events

Date Code Title Description
FC2A Withdrawal, rejection or dismissal of laid open patent application