CA2054380A1 - Controle du niveau d'un liquide avec des capteurs capacitifs - Google Patents

Controle du niveau d'un liquide avec des capteurs capacitifs

Info

Publication number
CA2054380A1
CA2054380A1 CA2054380A CA2054380A CA2054380A1 CA 2054380 A1 CA2054380 A1 CA 2054380A1 CA 2054380 A CA2054380 A CA 2054380A CA 2054380 A CA2054380 A CA 2054380A CA 2054380 A1 CA2054380 A1 CA 2054380A1
Authority
CA
Canada
Prior art keywords
liquid level
capacitive sensors
level control
liquid
pump
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.)
Granted
Application number
CA2054380A
Other languages
English (en)
Other versions
CA2054380C (fr
Inventor
James B. Farr
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.)
Tecumseh Products Co
Original Assignee
Tecumseh Products Co
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 Tecumseh Products Co filed Critical Tecumseh Products Co
Publication of CA2054380A1 publication Critical patent/CA2054380A1/fr
Application granted granted Critical
Publication of CA2054380C publication Critical patent/CA2054380C/fr
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
    • G01F23/26—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/025—Stopping, starting, unloading or idling control by means of floats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • 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
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
    • G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Cookers (AREA)
CA002054380A 1990-11-26 1991-10-28 Controle du niveau d'un liquide avec des capteurs capacitifs Expired - Fee Related CA2054380C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/618,164 US5145323A (en) 1990-11-26 1990-11-26 Liquid level control with capacitive sensors
US07/618,164 1990-11-26

Publications (2)

Publication Number Publication Date
CA2054380A1 true CA2054380A1 (fr) 1992-05-27
CA2054380C CA2054380C (fr) 1994-09-13

Family

ID=24476573

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002054380A Expired - Fee Related CA2054380C (fr) 1990-11-26 1991-10-28 Controle du niveau d'un liquide avec des capteurs capacitifs

Country Status (2)

Country Link
US (2) US5145323A (fr)
CA (1) CA2054380C (fr)

Families Citing this family (81)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5145323A (en) * 1990-11-26 1992-09-08 Tecumseh Products Company Liquid level control with capacitive sensors
US5216288A (en) * 1991-11-15 1993-06-01 The Marley Company Water level control circuit for sump pumps and the like
US5632468A (en) * 1993-02-24 1997-05-27 Aquatec Water Systems, Inc. Control circuit for solenoid valve
GB9307778D0 (en) * 1993-04-15 1993-06-02 Laws Ronald E Automatic liquid level control switch
BE1007258A3 (nl) * 1993-07-01 1995-05-02 Philips Electronics Nv Capacitieve sensorschakeling.
US5425624A (en) * 1993-10-22 1995-06-20 Itt Corporation Optical fluid-level switch and controls for bilge pump apparatus
US5591901A (en) * 1994-04-13 1997-01-07 Ryland Engineering Corporation Fluid sensor
US5925825A (en) * 1994-10-05 1999-07-20 Franklin Electric Co., Inc. Clamp and cup securing strain gauge cell adjacent pressure transmitting diaphragm
US5580221A (en) * 1994-10-05 1996-12-03 Franklin Electric Co., Inc. Motor drive circuit for pressure control of a pumping system
US5863185A (en) * 1994-10-05 1999-01-26 Franklin Electric Co. Liquid pumping system with cooled control module
IT1277427B1 (it) * 1995-08-03 1997-11-10 Miat Spa Apparecchio aerosol ad ultrasuoni
US6506559B1 (en) * 1997-12-23 2003-01-14 Carnegie Institute Of Washington Genetic inhibition by double-stranded RNA
ES2140337B1 (es) * 1998-01-19 2000-10-16 Univ Catalunya Politecnica Contador de tiempo de funcionamiento de bombas de achique.
US6390780B1 (en) * 1998-09-24 2002-05-21 Rule Industries, Inc. Pump and controller system and method
US6264431B1 (en) 1999-05-17 2001-07-24 Franklin Electric Co., Inc. Variable-speed motor drive controller for a pump-motor assembly
US6499961B1 (en) * 2000-03-16 2002-12-31 Tecumseh Products Company Solid state liquid level sensor and pump controller
FR2807116B1 (fr) * 2000-03-31 2002-06-28 Pompes Salmson Sa Pompe de relevage a detection de niveau capacitive
US6364620B1 (en) * 2000-08-29 2002-04-02 Zoeller Company Submersible pump containing two levels of moisture sensors
US6534947B2 (en) 2001-01-12 2003-03-18 Sta-Rite Industries, Inc. Pump controller
EP1329732A1 (fr) * 2002-01-18 2003-07-23 Agilent Technologies, Inc. (a Delaware corporation) Détermination de l'atténuation de câble et de la perte d'un signal du seuil
US7264449B1 (en) 2002-03-07 2007-09-04 Little Giant Pump Company Automatic liquid collection and disposal assembly
US20040084359A1 (en) * 2002-07-11 2004-05-06 Pasko John A. Manhole cover liquid level monitoring system
US8366883B2 (en) * 2002-11-13 2013-02-05 Deka Products Limited Partnership Pressurized vapor cycle liquid distillation
US6938478B2 (en) * 2002-11-14 2005-09-06 Herman Diaz Arias Impedance level meter for liquids in tanks
US6925398B2 (en) * 2003-07-07 2005-08-02 Colorado Vnet, Llc Water measurement apparatus and methods
US6989649B2 (en) 2003-07-09 2006-01-24 A. O. Smith Corporation Switch assembly, electric machine having the switch assembly, and method of controlling the same
US8540493B2 (en) 2003-12-08 2013-09-24 Sta-Rite Industries, Llc Pump control system and method
US7373817B2 (en) * 2004-07-09 2008-05-20 Touchsensor Technologies, Llc Solid state fluid level sensor
US8043070B2 (en) 2004-08-26 2011-10-25 Pentair Water Pool And Spa, Inc. Speed control
US8019479B2 (en) 2004-08-26 2011-09-13 Pentair Water Pool And Spa, Inc. Control algorithm of variable speed pumping system
US8469675B2 (en) 2004-08-26 2013-06-25 Pentair Water Pool And Spa, Inc. Priming protection
US7874808B2 (en) 2004-08-26 2011-01-25 Pentair Water Pool And Spa, Inc. Variable speed pumping system and method
US8480373B2 (en) 2004-08-26 2013-07-09 Pentair Water Pool And Spa, Inc. Filter loading
US7845913B2 (en) 2004-08-26 2010-12-07 Pentair Water Pool And Spa, Inc. Flow control
US8602745B2 (en) 2004-08-26 2013-12-10 Pentair Water Pool And Spa, Inc. Anti-entrapment and anti-dead head function
US7686589B2 (en) 2004-08-26 2010-03-30 Pentair Water Pool And Spa, Inc. Pumping system with power optimization
US8602744B2 (en) * 2005-03-25 2013-12-10 Diversitech Corporation Condensate pump
US8651824B2 (en) * 2005-03-25 2014-02-18 Diversitech Corporation Condensate pump
KR100794125B1 (ko) * 2006-07-27 2008-01-10 웅진코웨이주식회사 비접촉식 수위 제어 장치
US7755318B1 (en) * 2006-11-06 2010-07-13 Richard Panosh Soft-start/stop sump pump controller
US8380355B2 (en) * 2007-03-19 2013-02-19 Wayne/Scott Fetzer Company Capacitive sensor and method and apparatus for controlling a pump using same
US8936444B2 (en) * 2007-12-07 2015-01-20 Pentair Flow Technologies, Llc Capacitive liquid level sensor
US20090198458A1 (en) * 2008-01-29 2009-08-06 Mcdermid John Water measurement auto-networks
GB0802768D0 (en) * 2008-02-15 2008-03-26 Before The Event Ltd Detecting fluid in a conduit arrangement
US8579600B2 (en) 2008-03-28 2013-11-12 Sta-Rite Industries, Llc System and method for portable battery back-up sump pump
MX2011003708A (es) 2008-10-06 2011-06-16 Pentair Water Pool & Spa Inc Metodo para operar un sistema de seguridad para alivio de vacio.
US20100098555A1 (en) * 2008-10-17 2010-04-22 Wen Hua He Submersible Water Pump Device
US8089735B2 (en) * 2008-12-01 2012-01-03 Custom Sensors & Technologies, Inc. Hybrid power relay with thermal protection
US8418550B2 (en) 2008-12-23 2013-04-16 Little Giant Pump Company Method and apparatus for capacitive sensing the top level of a material in a vessel
WO2010099426A2 (fr) * 2009-02-26 2010-09-02 Mount Everest Technology Llc Système de capteur de niveau
US20110002791A1 (en) * 2009-04-07 2011-01-06 Itt Manufacturing Enterprises, Inc. Pump System for Removing Water from Pool Covers and Sumps
US20100275677A1 (en) * 2009-04-30 2010-11-04 Dennis Charles Parkins Gibbs Detecting fluid in a conduit arrangement
US9556874B2 (en) 2009-06-09 2017-01-31 Pentair Flow Technologies, Llc Method of controlling a pump and motor
US8564233B2 (en) 2009-06-09 2013-10-22 Sta-Rite Industries, Llc Safety system and method for pump and motor
KR20120046193A (ko) * 2009-07-27 2012-05-09 터치센서 테크놀로지스, 엘엘씨 레벨 감지 제어기 및 방법
US20110110792A1 (en) * 2009-11-12 2011-05-12 Joseph Kendall Mauro Sensors and methods and apparatus relating to same
US20110110794A1 (en) * 2009-11-12 2011-05-12 Philip Mayleben Sensors and methods and apparatus relating to same
US20110128154A1 (en) * 2009-12-01 2011-06-02 Flow-Rite Controls, Ltd. Battery electrolyte level indicator
MX344350B (es) 2010-12-08 2016-12-13 Pentair Water Pool & Spa Inc Válvula de descarga con vacío para sistema de liberación de vacío de seguridad.
CN103813812B (zh) 2011-02-23 2016-08-10 新星湾药物有限公司 具有监视器的角膜接触镜片清洁系统
US9692411B2 (en) * 2011-05-13 2017-06-27 Flow Control LLC Integrated level sensing printed circuit board
AU2012332382B2 (en) 2011-11-01 2016-11-03 Daniel J. Hruby Flow locking system and method
CN202350324U (zh) * 2011-11-29 2012-07-25 小田(中山)实业有限公司 快热水机
JP2013228365A (ja) * 2012-03-29 2013-11-07 Aisan Ind Co Ltd 液位計測装置
US9383244B2 (en) 2012-10-25 2016-07-05 Pentair Flow Technologies, Llc Fluid level sensor systems and methods
US9885360B2 (en) 2012-10-25 2018-02-06 Pentair Flow Technologies, Llc Battery backup sump pump systems and methods
US9638193B2 (en) 2012-10-25 2017-05-02 Pentair Flow Technologies, Llc Sump pump remote monitoring systems and methods
US9926933B2 (en) 2013-06-20 2018-03-27 Luraco, Inc. Bearing and shaft assembly for jet assemblies
US10302088B2 (en) 2013-06-20 2019-05-28 Luraco, Inc. Pump having a contactless, fluid sensor for dispensing a fluid to a setting
US9625744B2 (en) 2013-10-31 2017-04-18 Novabay Pharmaceuticals, Inc. Contact lens cleaning system with insulation
US20150129039A1 (en) * 2013-11-12 2015-05-14 Hamilton Beach Brands, Inc. Beverage Maker with Capacitance Fluid Level Sensor
CN103676988B (zh) * 2013-12-27 2016-09-28 深圳市得汛科技有限公司 一种适用于排水泵的水位检测控制电路及其工作方法
CN104020695B (zh) * 2014-06-18 2016-12-07 衢州昀睿工业设计有限公司 一种智能节水系统的控制电路
WO2016069018A1 (fr) * 2014-10-31 2016-05-06 Hewlett Packard Enterprise Development Lp Dispositif serveur pourvu d'un circuit capacitif
US10711788B2 (en) 2015-12-17 2020-07-14 Wayne/Scott Fetzer Company Integrated sump pump controller with status notifications
US11162496B2 (en) 2016-11-11 2021-11-02 Wayne/Scott Fetzer Company Pump with external electrical components and related methods
EP3631209A1 (fr) * 2017-05-24 2020-04-08 Bilge Sense Llc Commutateur de détection de liquide
USD893552S1 (en) 2017-06-21 2020-08-18 Wayne/Scott Fetzer Company Pump components
USD890211S1 (en) 2018-01-11 2020-07-14 Wayne/Scott Fetzer Company Pump components
US10278894B1 (en) 2018-02-05 2019-05-07 Luraco, Inc. Jet assembly having a friction-reducing member
DE102018217154B4 (de) * 2018-10-08 2022-02-17 Vitesco Technologies GmbH System zum Erkennen eines Trockenlaufs einer Pumpe

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2529015A (en) * 1945-02-07 1950-11-07 West Road Co Ltd Liquid contents gauge
US2409073A (en) * 1945-03-07 1946-10-08 Gen Electric Capacitor fuel gauge
US2570218A (en) * 1947-06-19 1951-10-09 Michael J Draganjac Remote-indicating fuel gauge
US2863472A (en) * 1954-09-08 1958-12-09 Robertshaw Fulton Controls Co Capacity sensitive relays
US2852937A (en) * 1955-04-07 1958-09-23 Honeywell Regulator Co Liquid level indicating apparatus
US3073160A (en) * 1958-09-09 1963-01-15 Sun Oil Co Capacity type level meter
US3282468A (en) * 1963-12-06 1966-11-01 Cory Corp Hot water supply apparatus
US3375716A (en) * 1965-10-12 1968-04-02 Simmonds Precision Products Fluid quantity measuring device
US3391547A (en) * 1966-02-28 1968-07-09 Varian Associates Capacitive liquid level sensor using phase sensitive detector means
SE320270B (fr) * 1967-11-04 1970-02-02 Inoue Michiro
US3544236A (en) * 1969-03-17 1970-12-01 James L Brookmire Fluid flow control
US3588859A (en) * 1969-04-21 1971-06-28 Frank Petree Level detector
US3800205A (en) * 1973-05-15 1974-03-26 Cutler Hammer Inc Sump pump control system
US4171186A (en) * 1977-08-12 1979-10-16 Hydronix, Inc. Submerged pump control
US4171932A (en) * 1977-09-23 1979-10-23 Nartron Corporation Liquid level sensor, pump system means and circuit means
DE2744820C3 (de) * 1977-10-05 1980-08-07 Endress U. Hauser Gmbh U. Co, 7867 Maulburg Kapazitiver Meßwertumformer
US4244385A (en) * 1979-12-12 1981-01-13 William Hotine Fluent material level control system
US4600844A (en) * 1984-06-07 1986-07-15 The Marley-Wylain Company Liquid level control apparatus
US4580403A (en) * 1985-01-15 1986-04-08 Hummel Roger L Solid state thermostatic control system for evaporative coolers
US4780705A (en) * 1987-02-10 1988-10-25 Enterprise Brass Works Of Florida, Inc. Overfill sensing system
US4881873A (en) * 1988-12-14 1989-11-21 Altus Technology Corporation Capacitance level sensor for a bilge pump
US5145323A (en) * 1990-11-26 1992-09-08 Tecumseh Products Company Liquid level control with capacitive sensors

Also Published As

Publication number Publication date
CA2054380C (fr) 1994-09-13
US5238369A (en) 1993-08-24
US5145323A (en) 1992-09-08

Similar Documents

Publication Publication Date Title
CA2054380A1 (fr) Controle du niveau d'un liquide avec des capteurs capacitifs
WO2000017521A3 (fr) Systeme pompe et commande et son procede d'utilisation
FR2724321B1 (fr)
CA2116134A1 (fr) Methode et dispositif de commande de hotte
EP0677655A3 (fr) Commande de pression de carburant utilisant un entraînement de pompe à hystérésis.
AU641734B2 (en) A sensor for detecting fluid flow from a positive displacement pump
AU6300590A (en) Pressure responsive fluid saving device
AU7993791A (en) Fluid control valve
AU7402291A (en) Fluid control valve
AU8904591A (en) Pump for windshield washer provided with level sensing device
DE59102632D1 (de) Regelventil mit Druckausgleich.
CA2013973A1 (fr) Dispositif de telecommande
AU8042791A (en) Housing arrangement for fluid pump and tank
GB9324580D0 (en) Liquid level control valve
DE3262034D1 (en) Pump control by suction throttling with an incorporated pressure limitation
GB2236805B (en) Fluid pump unit with flow control valve
DE3780325D1 (de) Vorrichtung zum schutz gegen wasserschaeden bei geschirrspuelmaschinen.
AU7304894A (en) Check valve structures for liquid ring pumps
EP0589573A3 (fr) Flotteur pour un dispositif actionné par le niveau d'un liquide.
CA2066572A1 (fr) Methode d'entree-sortie a point pouvant etre utilise simultanement comme entree et comme sortie
GB8917052D0 (en) Liquid metal processing
CA2098543A1 (fr) Suppression de la poisse dans des solides en vrac
USD292821S (en) Liquid level control valve
DE59303455D1 (de) Bodenbearbeitungsmaschine
ZA952968B (en) Screen for shower unit or bath

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed