DE69517972D1 - Piezoelektrische messfühler - Google Patents

Piezoelektrische messfühler

Info

Publication number
DE69517972D1
DE69517972D1 DE69517972T DE69517972T DE69517972D1 DE 69517972 D1 DE69517972 D1 DE 69517972D1 DE 69517972 T DE69517972 T DE 69517972T DE 69517972 T DE69517972 T DE 69517972T DE 69517972 D1 DE69517972 D1 DE 69517972D1
Authority
DE
Germany
Prior art keywords
pct
sec
support member
piezoelectric
date
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
Application number
DE69517972T
Other languages
English (en)
Other versions
DE69517972T2 (de
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
Publication of DE69517972D1 publication Critical patent/DE69517972D1/de
Application granted granted Critical
Publication of DE69517972T2 publication Critical patent/DE69517972T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • G01F23/2961—Acoustic 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Measuring Fluid Pressure (AREA)
  • Air Bags (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Measuring Leads Or Probes (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
DE69517972T 1994-04-25 1995-04-25 Piezoelektrische messfühler Expired - Fee Related DE69517972T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9408189A GB9408189D0 (en) 1994-04-25 1994-04-25 Fluid level detectors
PCT/GB1995/000939 WO1995029389A1 (en) 1994-04-25 1995-04-25 Piezoelectric sensors

Publications (2)

Publication Number Publication Date
DE69517972D1 true DE69517972D1 (de) 2000-08-17
DE69517972T2 DE69517972T2 (de) 2000-12-28

Family

ID=10754089

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69517972T Expired - Fee Related DE69517972T2 (de) 1994-04-25 1995-04-25 Piezoelektrische messfühler

Country Status (14)

Country Link
US (1) US5773913A (de)
EP (1) EP0757785B1 (de)
JP (1) JPH11503821A (de)
KR (1) KR970702480A (de)
AT (1) ATE194707T1 (de)
AU (1) AU2313395A (de)
CA (1) CA2188545A1 (de)
DE (1) DE69517972T2 (de)
DK (1) DK0757785T3 (de)
ES (1) ES2149358T3 (de)
GB (2) GB9408189D0 (de)
NO (1) NO964524D0 (de)
WO (1) WO1995029389A1 (de)
ZA (1) ZA953347B (de)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6023963A (en) 1997-04-24 2000-02-15 Seagate Technology, Inc. Single-sided sensor for glide height testing
JP3130289B2 (ja) * 1998-08-04 2001-01-31 株式会社ミツトヨ タッチ信号プローブ
DE10028319A1 (de) * 2000-06-07 2001-12-13 Endress Hauser Gmbh Co Elektromechanischer Wandler
DE10234578A1 (de) * 2002-07-30 2004-02-12 Zf Friedrichshafen Ag Füllstandssensor
US7119679B1 (en) * 2004-12-03 2006-10-10 Crom Eugene F Vehicle locating apparatus
US7571646B1 (en) 2005-03-10 2009-08-11 Houghton Brian L Electronic liquid level sensor
NL1031209C2 (nl) * 2006-02-22 2007-08-24 Enraf Bv Werkwijze en inrichting voor het nauwkeurig vaststellen van het niveau L van een vloeistof met behulp van naar het vloeistofniveau uitgestraalde radarsignalen en door het vloeistofniveau gereflecteerde radarsignalen.
US8202267B2 (en) * 2006-10-10 2012-06-19 Medsolve Technologies, Inc. Method and apparatus for infusing liquid to a body
US20080161754A1 (en) * 2006-12-29 2008-07-03 Medsolve Technologies, Inc. Method and apparatus for infusing liquid to a body
NL1034327C2 (nl) * 2007-09-04 2009-03-05 Enraf Bv Werkwijze en inrichting voor het binnen een bepaald meetbereik vaststellen van het niveau L van een vloeistof met behulp van naar het vloeistofniveau uitgestraalde radarsignalen en door het vloeistofniveau gereflecteerde radarsignalen.
US20100001867A1 (en) * 2007-12-28 2010-01-07 Matthew Rodrigue Device, system and method for monitoring tank content levels
US8708961B2 (en) * 2008-01-28 2014-04-29 Medsolve Technologies, Inc. Apparatus for infusing liquid to a body
US8631696B2 (en) * 2008-08-12 2014-01-21 Enraf, B.V. Apparatus and method for monitoring tanks in an inventory management system
US8271212B2 (en) * 2008-09-18 2012-09-18 Enraf B.V. Method for robust gauging accuracy for level gauges under mismatch and large opening effects in stillpipes and related apparatus
US8224594B2 (en) * 2008-09-18 2012-07-17 Enraf B.V. Apparatus and method for dynamic peak detection, identification, and tracking in level gauging applications
US8659472B2 (en) * 2008-09-18 2014-02-25 Enraf B.V. Method and apparatus for highly accurate higher frequency signal generation and related level gauge
US8417188B1 (en) * 2009-02-03 2013-04-09 Irobot Corporation Systems and methods for inspection and communication in liquid petroleum product
US8234084B2 (en) * 2009-03-17 2012-07-31 Enraf B.V. Apparatus and method for automatic gauge reading in an inventory control and management system
CN101660941B (zh) * 2009-09-23 2011-05-04 天津大学 结构改进型压电信号探测器
US8194410B2 (en) * 2010-04-06 2012-06-05 Apple Inc. Printed circuit board sensor mounting and alignment
US9046406B2 (en) 2012-04-11 2015-06-02 Honeywell International Inc. Advanced antenna protection for radars in level gauging and other applications
US9772210B1 (en) 2012-06-11 2017-09-26 Brian L. Houghton Storage tank level detection method and system
CN102751133A (zh) * 2012-07-12 2012-10-24 肖国选 压电变频接触式液位开关
US8646860B1 (en) 2012-07-23 2014-02-11 Xerox Corporation Piezoelectric sensor arrangement for sensing fluid level in small volume and irregular shape reservoirs
US9336074B2 (en) 2013-07-26 2016-05-10 Honeywell International Inc. Apparatus and method for detecting a fault with a clock source

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1125125A (fr) * 1955-04-27 1956-10-24 Procédé et dispositifs de mesure et de contrôle de la différence entre deux grandeurs physiques
US3220258A (en) * 1956-05-18 1965-11-30 Acoustica Associates Inc Sensing the presence or absence of material
US4446454A (en) * 1981-01-21 1984-05-01 Pyle Ronald E Home security system
GB2097964A (en) * 1981-04-09 1982-11-10 Patscentre Benelux Sa Nv Improvements in the control of liquid level
US4679160A (en) * 1984-12-13 1987-07-07 Surface Systems, Inc. Ultrasonic depth measurement apparatus and methods
SE466418B (sv) * 1989-02-23 1992-02-10 Bror Allan Eriksson Foerfaringssaett foer undersoekning av en vaetskefyllning i en behaallare samt anordning foer att med hjaelp av ultraljudvaagor bestaemma nivaan av en eller flera graensytor hos en vaetskefyllning i en behaallare
US5349994A (en) * 1990-09-28 1994-09-27 Dover Corporation Control system for filling tanks with liquids
FR2676810B1 (fr) * 1991-05-22 1994-12-02 Peugeot Dispositif de mesure du niveau de liquide.

Also Published As

Publication number Publication date
GB2303920A (en) 1997-03-05
AU2313395A (en) 1995-11-16
CA2188545A1 (en) 1995-11-02
GB2303920B (en) 1998-08-26
DE69517972T2 (de) 2000-12-28
US5773913A (en) 1998-06-30
GB9408189D0 (en) 1994-06-15
WO1995029389A1 (en) 1995-11-02
GB9622295D0 (en) 1996-12-18
ATE194707T1 (de) 2000-07-15
DK0757785T3 (da) 2000-10-30
KR970702480A (ko) 1997-05-13
ES2149358T3 (es) 2000-11-01
JPH11503821A (ja) 1999-03-30
ZA953347B (en) 1996-01-11
NO964524L (no) 1996-10-24
EP0757785B1 (de) 2000-07-12
NO964524D0 (no) 1996-10-24
EP0757785A1 (de) 1997-02-12
GB2303920A8 (en) 1997-03-17

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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