GB1512233A - Piezoelectric presence sensitive apparatus - Google Patents

Piezoelectric presence sensitive apparatus

Info

Publication number
GB1512233A
GB1512233A GB1102475A GB1102475A GB1512233A GB 1512233 A GB1512233 A GB 1512233A GB 1102475 A GB1102475 A GB 1102475A GB 1102475 A GB1102475 A GB 1102475A GB 1512233 A GB1512233 A GB 1512233A
Authority
GB
United Kingdom
Prior art keywords
tubular body
circuit
level
oscillator
march
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
Application number
GB1102475A
Other languages
English (en)
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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
Priority claimed from JP3251174U external-priority patent/JPS50122259U/ja
Priority claimed from JP1974032513U external-priority patent/JPS5535529Y2/ja
Priority claimed from JP3251274U external-priority patent/JPS557861Y2/ja
Priority claimed from JP49057170A external-priority patent/JPS50149370A/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of GB1512233A publication Critical patent/GB1512233A/en
Expired 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
    • G01F23/14—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 measurement of pressure
    • G01F23/18—Indicating, recording or alarm devices actuated electrically
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/08—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of piezoelectric devices, i.e. electric circuits therefor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Measuring Fluid Pressure (AREA)
GB1102475A 1974-03-20 1975-03-17 Piezoelectric presence sensitive apparatus Expired GB1512233A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP3251174U JPS50122259U (enrdf_load_stackoverflow) 1974-03-20 1974-03-20
JP1974032513U JPS5535529Y2 (enrdf_load_stackoverflow) 1974-03-20 1974-03-20
JP3251274U JPS557861Y2 (enrdf_load_stackoverflow) 1974-03-20 1974-03-20
JP49057170A JPS50149370A (enrdf_load_stackoverflow) 1974-05-20 1974-05-20

Publications (1)

Publication Number Publication Date
GB1512233A true GB1512233A (en) 1978-05-24

Family

ID=27459632

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1102475A Expired GB1512233A (en) 1974-03-20 1975-03-17 Piezoelectric presence sensitive apparatus

Country Status (4)

Country Link
DE (1) DE2512060B2 (enrdf_load_stackoverflow)
FR (1) FR2265084B1 (enrdf_load_stackoverflow)
GB (1) GB1512233A (enrdf_load_stackoverflow)
IT (1) IT1032358B (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2436372A1 (fr) * 1978-09-13 1980-04-11 Cit Alcatel Dispositif de controle du niveau d'un materiau fluide contenu dans un reservoir vertical
GB2152665A (en) * 1984-01-03 1985-08-07 Ae Cds Autoclave Inc Liquid level detection
EP0229225A3 (en) * 1985-12-10 1989-04-26 Vdo Adolf Schindling Ag Device for measuring the level in a container
GB2321107A (en) * 1997-01-14 1998-07-15 Smiths Industries Plc Fluid level detector
EP0985916A1 (de) * 1998-09-09 2000-03-15 Endress + Hauser GmbH + Co. Vorrichtung zur Feststellung und/oder Überwachung eines vorbestimmten Füllstandes in einem Behälter
US6236322B1 (en) 1998-09-09 2001-05-22 Endress + Hauser Gmbh + Co. Apparatus for establishing and/or monitoring a predetermined filling level in a container
EP1239267A3 (en) * 2001-03-07 2003-10-15 Starr Johnson Liquid level measurement by magnetic excitation and vibration sensing

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3215040C2 (de) * 1982-04-22 1985-11-07 VEGA Grieshaber -GmbH & Co, 7622 Schiltach Resonanzstab
US4570482A (en) * 1982-04-23 1986-02-18 Murata Manufacturing Co., Ltd. Load-sensitive level detecting device
DE3312652A1 (de) * 1983-04-08 1984-10-11 Flutec Fluidtechnische Geräte GmbH, 6603 Sulzbach Vorrichtung zum messen des fuellstandes und der temperatur des fuellgutes in einem behaelter
DE3314872A1 (de) * 1983-04-25 1984-10-25 Vdo Adolf Schindling Ag, 6000 Frankfurt Einrichtung zur meldung des fuellstandes an dem ort eines sensors
US4740726A (en) * 1986-07-21 1988-04-26 Nohken Inc. Vibrator-type level sensor
DE3640443C2 (de) * 1986-11-27 1995-06-01 Vdo Schindling Einrichtung zur Erfassung des Füllstandes in einem Behälter
DE3640444C2 (de) * 1986-11-27 1996-11-07 Vdo Schindling Einrichtung zur Erfassung des Füllstandes in einem Behälter
DE3810670C2 (de) * 1988-03-29 1998-11-26 Siemens Ag Vorrichtung zur Pegelstandsüberwachung
DE4316148A1 (de) * 1993-05-15 1994-11-17 Hahn Schickard Ges Sensor für die Füllstandsmessung von Fluiden
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
DE10138360A1 (de) * 2001-08-04 2003-02-27 Daimler Chrysler Ag Füllstandsmesssystem
DE102010038535A1 (de) 2010-07-28 2012-02-02 Endress + Hauser Gmbh + Co. Kg Vorrichtung zur Bestimmung und/oder Überwachung eines vorgegebenen Füllstands
DE102011090014A1 (de) * 2011-12-28 2013-07-04 Endress + Hauser Gmbh + Co. Kg Vorrichtung zur Bestimmung und/oder Überwachung mindestens einer Prozessgröße
DE102019210901A1 (de) * 2019-07-23 2021-01-28 Robert Bosch Gmbh Sensorvorrichtung und Tankvorrichtung für Kraftfahrzeuge

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2436372A1 (fr) * 1978-09-13 1980-04-11 Cit Alcatel Dispositif de controle du niveau d'un materiau fluide contenu dans un reservoir vertical
GB2152665A (en) * 1984-01-03 1985-08-07 Ae Cds Autoclave Inc Liquid level detection
EP0229225A3 (en) * 1985-12-10 1989-04-26 Vdo Adolf Schindling Ag Device for measuring the level in a container
GB2321107A (en) * 1997-01-14 1998-07-15 Smiths Industries Plc Fluid level detector
EP0985916A1 (de) * 1998-09-09 2000-03-15 Endress + Hauser GmbH + Co. Vorrichtung zur Feststellung und/oder Überwachung eines vorbestimmten Füllstandes in einem Behälter
US6236322B1 (en) 1998-09-09 2001-05-22 Endress + Hauser Gmbh + Co. Apparatus for establishing and/or monitoring a predetermined filling level in a container
EP1239267A3 (en) * 2001-03-07 2003-10-15 Starr Johnson Liquid level measurement by magnetic excitation and vibration sensing

Also Published As

Publication number Publication date
FR2265084A1 (enrdf_load_stackoverflow) 1975-10-17
DE2512060B2 (de) 1978-06-15
DE2512060A1 (de) 1975-12-04
IT1032358B (it) 1979-05-30
FR2265084B1 (enrdf_load_stackoverflow) 1980-03-14

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940317