[go: up one dir, main page]

ES2138733T3 - Sistemas perceptores piezoelectricos. - Google Patents

Sistemas perceptores piezoelectricos.

Info

Publication number
ES2138733T3
ES2138733T3 ES95916761T ES95916761T ES2138733T3 ES 2138733 T3 ES2138733 T3 ES 2138733T3 ES 95916761 T ES95916761 T ES 95916761T ES 95916761 T ES95916761 T ES 95916761T ES 2138733 T3 ES2138733 T3 ES 2138733T3
Authority
ES
Spain
Prior art keywords
piezoelectric
perceptor
systems
sensing element
resonant frequency
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 - Lifetime
Application number
ES95916761T
Other languages
English (en)
Inventor
Ian Casselden
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sensor Systems Jersey Ltd
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
Application granted granted Critical
Publication of ES2138733T3 publication Critical patent/ES2138733T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Analysing Materials By The Use Of Radiation (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)
  • Burglar Alarm Systems (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

SE PRESENTA UN SISTEMA SENSIBLE PIEZOELECTRICO EN EL QUE UN ELEMENTO SENSIBLE PIEZOELECTRICO VIBRANTE (50) ES CONDUCIDO POR UNA SEÑAL DE CONDUCCION PERIODICA EN O CERCA DE LA FRECUENCIA DE RESONANCIA DEL ELEMENTO SENSIBLE, Y EN EL QUE UNA SEÑAL DE RETORNO DESDE EL ELEMENTO SENSIBLE ES CONTROLADA PARA DETECTAR UN CAMBIO EN LA FRECUENCIA DE RESONANCIA.
ES95916761T 1994-04-25 1995-04-25 Sistemas perceptores piezoelectricos. Expired - Lifetime ES2138733T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9408176A GB9408176D0 (en) 1994-04-25 1994-04-25 Fluid level detectors

Publications (1)

Publication Number Publication Date
ES2138733T3 true ES2138733T3 (es) 2000-01-16

Family

ID=10754082

Family Applications (1)

Application Number Title Priority Date Filing Date
ES95916761T Expired - Lifetime ES2138733T3 (es) 1994-04-25 1995-04-25 Sistemas perceptores piezoelectricos.

Country Status (13)

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

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
US7383727B2 (en) 1999-05-20 2008-06-10 Seiko Epson Corporation Liquid cotainer having a liquid consumption detecting device therein
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
KR100439616B1 (ko) 2000-05-18 2004-07-12 세이코 엡슨 가부시키가이샤 설치 구조체, 모듈체, 및 액체 용기
EP1373840B1 (de) 2001-03-28 2009-09-23 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 (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
JPH11503820A (ja) 1999-03-30
GB2302178A (en) 1997-01-08
GB9622296D0 (en) 1996-12-18
DE69512652T2 (de) 2000-04-27
ATE185420T1 (de) 1999-10-15
CA2188547A1 (en) 1995-11-02
EP0757784B1 (en) 1999-10-06
GB9408176D0 (en) 1994-06-15
DK0757784T3 (da) 2000-03-20
GB2302178B (en) 1998-04-29
DE69512652D1 (de) 1999-11-11
EP0757784A1 (en) 1997-02-12
NO964523D0 (no) 1996-10-24
AU2313295A (en) 1995-11-16
NO964523L (no) 1996-11-14
KR970702479A (ko) 1997-05-13
ZA953346B (en) 1996-01-11
WO1995029388A1 (en) 1995-11-02

Similar Documents

Publication Publication Date Title
ES2138733T3 (es) Sistemas perceptores piezoelectricos.
DE69522721D1 (de) Mechanischer signalprozessor auf basis von mikromechanischen oszillatoren und intelligenten akustischen detektoren und darauf aufgebaute systeme
DE69015984D1 (de) Piezoelektrischer Druckwandler.
DE69601246D1 (de) Temperaturkompensierter piezoelektrischer Oszillator
FR2674627B1 (fr) Capteur de pression resonant.
EP0633467A3 (en) Improvement of the measurement accuracy when analyzing bulk goods.
FR2695771B1 (fr) Transducteur d'ondes unidirectionnel.
NO944374D0 (no) Framgangsmåte og sensor for bestemmelse av fasetilstander i vann
DE69214924D1 (de) Piezoelektrische Fluiddrucksensor
DE69614983D1 (de) Piezoelektrischer Resonator
DE69521447D1 (de) Wandler mit Schwingelement
DE69407325D1 (de) Magnetostriktiver Druckwandler
FR2653632B1 (fr) Transducteur d'ondes de surface unidirectionnel.
FR2686412B1 (fr) Capteur piezoelectrique compense en temperature.
FR2755552B1 (fr) Dispositif de recopie d'un signal d'horloge d'entree a frequence non continue
KR970019083U (ko) 압전진동센서
KR940025308U (ko) 압력센서의 초기 발진주파수 조절장치
FR2757319B1 (fr) Microlaser a frequence d'emission modulee a l'aide d'un element piezoelectrique ou electro-optique
KR950020332U (ko) 초음파 감지센서 고장 검출장치
FR2706608B1 (fr) Système de mesure de signaux d'un oscillateur fluidique.
DE69507770D1 (de) Piezoelektrischer Schwingungssensor
IT8946875A0 (it) Circuito di autoadeguamento della soglia di sensibilita'in presenza dipiccole perturbazioni ambientali variabili nel tempo,particolarmente per dispositivi ad ultrasuoni
FR2692038B1 (fr) Dispositif detecteur de contraintes, notamment detecteur de vibrations ou de temperature.
ITFI930136A1 (it) Trasduttore piezoelettrico ad ultrasuoni
DE69325362D1 (de) Ultraschallsensor

Legal Events

Date Code Title Description
FG2A Definitive protection

Ref document number: 757784

Country of ref document: ES