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HU9301249D0 - Level switch - Google Patents

Level switch

Info

Publication number
HU9301249D0
HU9301249D0 HU9301249A HU9301249A HU9301249D0 HU 9301249 D0 HU9301249 D0 HU 9301249D0 HU 9301249 A HU9301249 A HU 9301249A HU 9301249 A HU9301249 A HU 9301249A HU 9301249 D0 HU9301249 D0 HU 9301249D0
Authority
HU
Hungary
Prior art keywords
output
level switch
operational amplifier
ring plate
electrode
Prior art date
Application number
HU9301249A
Other languages
English (en)
Other versions
HUT66527A (en
Inventor
Andrej Zatler
Franc Eferl
Original Assignee
Andrej Zatler
Franc Eferl
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 Andrej Zatler, Franc Eferl filed Critical Andrej Zatler
Publication of HU9301249D0 publication Critical patent/HU9301249D0/hu
Publication of HUT66527A publication Critical patent/HUT66527A/hu

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
    • G01F23/24—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 variations of resistance of resistors due to contact with conductor fluid
    • G01F23/241—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 variations of resistance of resistors due to contact with conductor fluid for discrete levels
    • G01F23/242—Mounting arrangements for electrodes
    • 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
    • G01F23/24—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 variations of resistance of resistors due to contact with conductor fluid
    • G01F23/241—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 variations of resistance of resistors due to contact with conductor fluid for discrete levels
    • G01F23/243—Schematic arrangements of probes combined with measuring circuits
    • 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
    • G01F23/24—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 variations of resistance of resistors due to contact with conductor fluid
    • G01F23/241—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 variations of resistance of resistors due to contact with conductor fluid for discrete levels
    • G01F23/243—Schematic arrangements of probes combined with measuring circuits
    • G01F23/244—Schematic arrangements of probes combined with measuring circuits comprising oscillating circuits
    • 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
    • G01F23/26—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 variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—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 variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/265—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 variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors 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
    • G01F23/26—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 variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—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 variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/266—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 variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors measuring circuits therefor
    • 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
    • G01F23/26—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 variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—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 variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/268—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 variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors mounting arrangements of probes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/945—Proximity switches
    • H03K17/955—Proximity switches using a capacitive detector

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Electronic Switches (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Lock And Its Accessories (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Amplifiers (AREA)
HU9301249A 1992-05-06 1993-04-29 Level switch HUT66527A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SI9200073A SI9200073A (sl) 1992-05-06 1992-05-06 Nivojsko stikalo
DE4217305A DE4217305C2 (de) 1992-05-06 1992-05-25 Niveauschalter

Publications (2)

Publication Number Publication Date
HU9301249D0 true HU9301249D0 (en) 1993-08-30
HUT66527A HUT66527A (en) 1994-12-28

Family

ID=39537883

Family Applications (1)

Application Number Title Priority Date Filing Date
HU9301249A HUT66527A (en) 1992-05-06 1993-04-29 Level switch

Country Status (12)

Country Link
US (1) US5532527A (hu)
EP (1) EP0568973B1 (hu)
JP (1) JPH06258128A (hu)
CN (1) CN1080395A (hu)
AT (1) ATE141405T1 (hu)
AU (1) AU668929B2 (hu)
BR (1) BR9301754A (hu)
CZ (1) CZ83093A3 (hu)
DE (1) DE4217305C2 (hu)
HR (1) HRP930856A2 (hu)
HU (1) HUT66527A (hu)
SI (1) SI9200073A (hu)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SI9200073A (sl) * 1992-05-06 1993-12-31 Andrej Zatler Nivojsko stikalo
US5739598A (en) * 1993-07-30 1998-04-14 Zatler; Andrej Selfadjusting capacitive level switch for a non-contact or contact sensing of media or objects
DE19502195A1 (de) 1995-01-25 1996-08-01 Grieshaber Vega Kg Verfahren und Anordnung zur Auswertung der Signale eines kapazitiven Füllstandsensors
DE19528384C2 (de) * 1995-08-02 1999-09-30 Ulrich Pok Kapazitive Meßeinrichtung zur kontinuierlichen Standregelung für Medien unterschiedlicher Dielektrizitätskonstanten
US5802728A (en) * 1995-08-17 1998-09-08 Watson Industries, Inc. Liquid level and angle detector
US5765434A (en) * 1996-07-18 1998-06-16 Scepter Scientific, Inc. Capacitive water height gauge and method
US5844491A (en) * 1997-04-30 1998-12-01 Endress + Hauser Gmbh + Co. Apparatus for establishing and/or monitoring a predetermined filling level in a container
DE19749884C1 (de) * 1997-11-12 1999-08-19 Rechner Ind Elektronik Gmbh Schaltungsanordnung zur linearen, materialunabhängigen kapazitiven Standmessung
DE19756161B4 (de) * 1997-12-17 2010-08-05 Hiss, Eckart, Dr. Auswertungsverfahren
DE19949985C2 (de) * 1999-10-15 2001-08-16 Sie Sensorik Ind Elektronik Gm Kapazitiver Sensor zur Detektion des Füllstandes eines Mediums in einem Behälter
US6499961B1 (en) 2000-03-16 2002-12-31 Tecumseh Products Company Solid state liquid level sensor and pump controller
US6362632B1 (en) * 2000-05-24 2002-03-26 Becs Technology, Inc. Balanced charge pump capacitive material sensor
DE10309769B4 (de) * 2002-03-08 2017-10-05 Ust Umweltsensortechnik Gmbh Anordnung zur Bestimmung von Zustandsgrößen für Flüssigkeiten in einem geschlossenen nichtmetallischen Behälter
US20060191154A1 (en) * 2004-08-27 2006-08-31 Thilo Kraemer Method for measuring the thickness and/or length of objects and devices for this purpose
TW200816551A (en) * 2006-09-18 2008-04-01 Syspotek Corp Fluid measuring device
JP4737453B2 (ja) 2006-12-06 2011-08-03 Ｓｍｃ株式会社 流体圧シリンダ
JP4737454B2 (ja) 2006-12-06 2011-08-03 Ｓｍｃ株式会社 流体圧シリンダに用いられる止め輪
DE102007008358A1 (de) * 2007-02-16 2008-08-21 Endress + Hauser Gmbh + Co. Kg Vorrichtung zur Bestimmung und/oder Überwachung einer Prozessgröße
US9692411B2 (en) * 2011-05-13 2017-06-27 Flow Control LLC Integrated level sensing printed circuit board
US8756992B2 (en) 2011-09-14 2014-06-24 Alstom Technology Ltd Level detector for measuring foam and aerated slurry level in a wet flue gas desulfurization absorber tower
EP3593097B1 (en) * 2017-03-09 2022-10-19 King Abdullah University Of Science And Technology Fluid characteristic sensor system and method
DE102018101206A1 (de) 2018-01-19 2019-07-25 Endress+Hauser SE+Co. KG Sondeneinheit
US10635228B2 (en) * 2018-02-22 2020-04-28 Samsung Display Co., Ltd. System and method for mutual capacitance sensing
AU2019257251B2 (en) 2018-04-18 2023-04-13 Pitco Frialator, Inc. Capacitive sensor device
JP7187953B2 (ja) * 2018-10-04 2022-12-13 株式会社豊田中央研究所 バッファ回路
US11674838B2 (en) 2019-04-04 2023-06-13 Poseidon Systems Llc Capacitive fringe field oil level sensor with integrated humidity and temperature sensing
US20230048795A1 (en) * 2020-01-24 2023-02-16 Vega Grieshaber Kg Electronic unit for a fill level measuring probe

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US3412220A (en) * 1963-11-26 1968-11-19 Sprague Electric Co Voltage sensitive switch and method of making
US3956760A (en) * 1975-03-12 1976-05-11 Liquidometer Corporation Liquid level gauge
CA1053778A (en) * 1976-05-06 1979-05-01 Frank Kitzinger Froth level monitor
DE2751864A1 (de) * 1976-11-22 1978-05-24 Drexelbrook Controls Leitwert-messanordnung zur ueberwachung des zustandes von materialien
US4188549A (en) * 1977-11-11 1980-02-12 Federal Screw Works Acoustically responsive sensor switch
DE2819731C2 (de) * 1978-05-05 1982-08-12 Vega Vertrieb und Fertigung elektronischer Geräte und Apparate Grieshaber KG, 7620 Wolfach Anordnung zur kapazitiven Füllstandsmessung in einem Behälter
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US5097703A (en) * 1984-11-30 1992-03-24 Aisin Seiki Kabushiki Kaisha Capacitive probe for use in a system for remotely measuring the level of fluids
DE3878973D1 (de) * 1987-04-24 1993-04-15 Simmonds Precision Products Bestimmung von elektrischer kapazitaet und elektrischem widerstand.
US4855706A (en) * 1987-09-11 1989-08-08 Hauptly Paul D Organic liquid detector
DD282551A5 (de) * 1989-04-21 1990-09-12 Transform Roentgen Matern Veb Transistor-wechselrichter in brueckenschaltung
JP2731240B2 (ja) * 1989-05-25 1998-03-25 富士重工業株式会社 オイルセンサ
US4952914A (en) * 1989-10-13 1990-08-28 General Motors Corporation Washer fluid monitor
US5287086A (en) * 1990-01-02 1994-02-15 Raptor, Inc. Proximity detection system and oscillator
JPH03233391A (ja) * 1990-02-08 1991-10-17 Aisin Seiki Co Ltd 人員検出装置
US5166679A (en) * 1991-06-06 1992-11-24 The United States Of America As Represented By The Administrator Of The National Aeronautics & Space Administration Driven shielding capacitive proximity sensor
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SI9200073A (sl) * 1992-05-06 1993-12-31 Andrej Zatler Nivojsko stikalo

Also Published As

Publication number Publication date
US5532527A (en) 1996-07-02
EP0568973B1 (de) 1996-08-14
CN1080395A (zh) 1994-01-05
ATE141405T1 (de) 1996-08-15
CZ83093A3 (en) 1994-11-16
AU3837993A (en) 1993-11-11
BR9301754A (pt) 1993-11-09
SI9200073A (sl) 1993-12-31
JPH06258128A (ja) 1994-09-16
DE4217305C2 (de) 1999-11-04
DE4217305A1 (de) 1993-12-02
HRP930856A2 (hr) 1995-02-28
EP0568973A2 (de) 1993-11-10
AU668929B2 (en) 1996-05-23
HUT66527A (en) 1994-12-28
EP0568973A3 (de) 1994-12-21

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Legal Events

Date Code Title Description
DFC4 Cancellation of temporary protection due to refusal