DE69429755D1 - Kapazitätsmesseinrichtung - Google Patents
KapazitätsmesseinrichtungInfo
- Publication number
- DE69429755D1 DE69429755D1 DE69429755T DE69429755T DE69429755D1 DE 69429755 D1 DE69429755 D1 DE 69429755D1 DE 69429755 T DE69429755 T DE 69429755T DE 69429755 T DE69429755 T DE 69429755T DE 69429755 D1 DE69429755 D1 DE 69429755D1
- Authority
- DE
- Germany
- Prior art keywords
- measuring device
- capacitor
- capacity measuring
- proportionality
- delay
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
-
- 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
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2605—Measuring capacitance
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Fluid Mechanics (AREA)
- Thermal Sciences (AREA)
- Electromagnetism (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Paper (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
- Measuring Fluid Pressure (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/123,316 US5461321A (en) | 1993-09-17 | 1993-09-17 | Apparatus and method for measuring capacitance from the duration of a charge-discharge charge cycle |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69429755D1 true DE69429755D1 (de) | 2002-03-14 |
DE69429755T2 DE69429755T2 (de) | 2002-09-26 |
Family
ID=22407936
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69429755T Expired - Fee Related DE69429755T2 (de) | 1993-09-17 | 1994-09-16 | Kapazitätsmesseinrichtung |
Country Status (10)
Country | Link |
---|---|
US (2) | US5461321A (de) |
EP (1) | EP0644432B1 (de) |
KR (1) | KR950009271A (de) |
CN (1) | CN1111355A (de) |
AT (1) | ATE212726T1 (de) |
AU (1) | AU677087B2 (de) |
CA (1) | CA2132225C (de) |
DE (1) | DE69429755T2 (de) |
ES (1) | ES2171426T3 (de) |
TW (1) | TW247350B (de) |
Families Citing this family (71)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5585733A (en) * | 1992-09-10 | 1996-12-17 | David Sarnoff Research Center | Capacitive sensor and method of measuring changes in capacitance |
US6125696A (en) * | 1993-10-27 | 2000-10-03 | Kdi Precision Products, Inc. | Digital liquid level sensing apparatus |
JP3351171B2 (ja) * | 1995-04-13 | 2002-11-25 | トヨタ自動車株式会社 | コンデンサ容量診断回路 |
US5646539A (en) * | 1995-08-31 | 1997-07-08 | Caterpillar Inc. | Multi-purpose capacitive sensor |
GB9519006D0 (en) * | 1995-09-16 | 1995-11-15 | Rolls Royce & Ass | Capacitance probe |
US5869973A (en) * | 1995-10-26 | 1999-02-09 | Nosov; Eugene I. | Time-domain dielectric spectroscopy method and apparatus |
US5730165A (en) * | 1995-12-26 | 1998-03-24 | Philipp; Harald | Time domain capacitive field detector |
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 |
US5945831A (en) * | 1997-06-10 | 1999-08-31 | Sargent; John S. | Volume charge density measuring system |
US5963043A (en) * | 1997-09-17 | 1999-10-05 | International Business Machines Corporation | Method and apparatus for characterized parasitic capacitance between integrated-circuit interconnects |
US6984900B1 (en) * | 1998-10-09 | 2006-01-10 | Azoteq (Pty) Ltd. | Intelligent electrical switch |
US6249089B1 (en) | 1998-10-09 | 2001-06-19 | Frederick Bruwer | Intelligent electrical device comprising microchip |
US6186001B1 (en) * | 1999-06-18 | 2001-02-13 | William J. Baker | Sensor for measuring content levels in containers |
FR2795816B1 (fr) * | 1999-07-02 | 2001-09-28 | Roxer | Capteur de niveau |
NL1012743C2 (nl) * | 1999-07-29 | 2001-01-30 | Enraf Bv | Capacitieve sensor voor niveaumeting van water in een olietank. |
WO2001009625A1 (fr) * | 1999-08-03 | 2001-02-08 | Pavlenko Vladimir Alexandrovic | Detecteur capacitif |
US6604054B2 (en) | 2000-02-29 | 2003-08-05 | Gen-Probe, Inc. | Method of detecting fluid flow through a conduit |
EP1158303A1 (de) * | 2000-05-25 | 2001-11-28 | Semiconductor Ideas to The Market (ItoM) BV | In Planartechnik ausgeführter Schaltkreis zur Messung der absoluten Streuung von Kapazitäten |
ATE280951T1 (de) * | 2001-03-16 | 2004-11-15 | Nils Aage Juul Eilersen | Kapazitätsmess-schaltung |
US6522154B2 (en) | 2001-03-16 | 2003-02-18 | International Business Machines Corporation | Oxide tracking voltage reference |
US6441592B1 (en) | 2001-04-13 | 2002-08-27 | Visteon Global Technologies, Inc. | Method for measurement of backup power supply capacitance in restraint control module |
US6661410B2 (en) | 2001-09-07 | 2003-12-09 | Microsoft Corporation | Capacitive sensing and data input device power management |
US6703599B1 (en) * | 2002-01-30 | 2004-03-09 | Microsoft Corporation | Proximity sensor with adaptive threshold |
US6954867B2 (en) | 2002-07-26 | 2005-10-11 | Microsoft Corporation | Capacitive sensing employing a repeatable offset charge |
PL204266B1 (pl) * | 2003-02-07 | 2009-12-31 | Elektroniczny Zak & Lstrok Ad | Sposób i układ elektroniczny do wykrywania obecności środowiska przewodzącego lub dielektrycznego o przenikalności dielektrycznej większej od powietrza |
DE10333154A1 (de) * | 2003-07-22 | 2005-02-24 | Vega Grieshaber Kg | Verfahren und Schaltungsanordnung zum Auswerten einer Messkapazität |
DE10342472B4 (de) * | 2003-09-15 | 2008-01-31 | Infineon Technologies Ag | Schaltungsanordnung und Verfahren zum Testen eines Kapazitätsfeldes in einer integrierten Schaltung |
JP4023684B2 (ja) * | 2004-02-13 | 2007-12-19 | ローム株式会社 | 周波数電流変換回路、及びそれを備えるイコライザ、光ディスク装置 |
EP1677084A1 (de) | 2004-12-22 | 2006-07-05 | Roxer Industries S.A. | Flüssigkeitspegelsensor und Verfahren zur Schätzung |
AU2006254863B2 (en) * | 2005-06-08 | 2011-06-30 | Lumenite Control Technology Inc. | Self-calibrating liquid level transmitter |
US7312616B2 (en) | 2006-01-20 | 2007-12-25 | Cypress Semiconductor Corporation | Successive approximate capacitance measurement circuit |
EP1862806B1 (de) * | 2006-06-01 | 2017-08-09 | Electrolux Home Products Corporation N.V. | Verfahren und Vorrichtung zum Messen der Kapazität einer kapazitiven Komponente |
US7282927B1 (en) * | 2006-06-21 | 2007-10-16 | Eastman Kodak Company | Use of a configurable electronic controller for capacitance measurements and cable break detection |
TW200816551A (en) * | 2006-09-18 | 2008-04-01 | Syspotek Corp | Fluid measuring device |
US8547114B2 (en) | 2006-11-14 | 2013-10-01 | Cypress Semiconductor Corporation | Capacitance to code converter with sigma-delta modulator |
DE102007007407A1 (de) * | 2007-02-12 | 2008-08-21 | Krohne S.A. | Füllstandsschalter und Verfahren zur Erfassung des Füllzustands eines in einem Behälter vorgesehenen Mediums |
US7804307B1 (en) * | 2007-06-29 | 2010-09-28 | Cypress Semiconductor Corporation | Capacitance measurement systems and methods |
US9500686B1 (en) | 2007-06-29 | 2016-11-22 | Cypress Semiconductor Corporation | Capacitance measurement system and methods |
US8570053B1 (en) | 2007-07-03 | 2013-10-29 | Cypress Semiconductor Corporation | Capacitive field sensor with sigma-delta modulator |
US8169238B1 (en) | 2007-07-03 | 2012-05-01 | Cypress Semiconductor Corporation | Capacitance to frequency converter |
US8089289B1 (en) | 2007-07-03 | 2012-01-03 | Cypress Semiconductor Corporation | Capacitive field sensor with sigma-delta modulator |
US7667468B1 (en) * | 2007-07-24 | 2010-02-23 | Cypress Semiconductor Corporation | Capacitive sensor with ratiometric voltage references |
US7830157B2 (en) * | 2007-12-28 | 2010-11-09 | 3M Innovative Properties Company | Pulsed capacitance measuring circuits and methods |
US8525798B2 (en) | 2008-01-28 | 2013-09-03 | Cypress Semiconductor Corporation | Touch sensing |
US8319505B1 (en) | 2008-10-24 | 2012-11-27 | Cypress Semiconductor Corporation | Methods and circuits for measuring mutual and self capacitance |
US8358142B2 (en) | 2008-02-27 | 2013-01-22 | Cypress Semiconductor Corporation | Methods and circuits for measuring mutual and self capacitance |
US9104273B1 (en) | 2008-02-29 | 2015-08-11 | Cypress Semiconductor Corporation | Multi-touch sensing method |
US7804599B2 (en) * | 2008-07-24 | 2010-09-28 | MGM Instruments, Inc. | Fluid volume verification system |
US8321174B1 (en) | 2008-09-26 | 2012-11-27 | Cypress Semiconductor Corporation | System and method to measure capacitance of capacitive sensor array |
EP2370824A1 (de) * | 2008-11-28 | 2011-10-05 | Ametek, Inc. | Vorrichtung zur hochpräzisionsmessung von unterschiedlichen oberflächen- und materialebenen |
US8225654B2 (en) * | 2009-07-01 | 2012-07-24 | Tecan Trading Ag | Self-compensating capacitive liquid level detector |
US8723827B2 (en) | 2009-07-28 | 2014-05-13 | Cypress Semiconductor Corporation | Predictive touch surface scanning |
TWI385394B (en) * | 2009-09-18 | 2013-02-11 | Method of capacitance measurement for capacitive touch panel | |
CN101799496B (zh) * | 2010-03-09 | 2013-03-20 | 臧佳菁 | 电容测量装置及其方法 |
CN101858941A (zh) * | 2010-03-30 | 2010-10-13 | 矽创电子股份有限公司 | 具抗电磁干扰能力的电容感测电路 |
DE102012201596A1 (de) * | 2012-02-03 | 2013-08-08 | Robert Bosch Gmbh | Empfangsanordnung für ein Steuergerät in einem Fahrzeug und Verfahren zum Erzeugen eines Synchronisationspulses |
US9261395B2 (en) * | 2012-02-13 | 2016-02-16 | Goodrich Corporation | Liquid level sensing system |
TWI448696B (zh) * | 2012-07-05 | 2014-08-11 | Chroma Ate Inc | 訊號量測裝置 |
EP2741087B1 (de) * | 2012-12-04 | 2019-10-02 | F. Hoffmann-La Roche AG | Verfahren und System zur Erkennung von flüssigen Oberflächen |
EP2757352B1 (de) * | 2013-01-17 | 2015-11-18 | EM Microelectronic-Marin SA | Sensorüberwachungssystem und -verwaltungsmethode |
FR3002643B1 (fr) * | 2013-02-26 | 2015-04-03 | Continental Automotive France | Procede de recherche de variation electrique d'un capteur capacitif de vehicule automobile |
DE102015008485A1 (de) * | 2015-07-01 | 2017-01-05 | Leopold Kostal Gmbh & Co. Kg | Verfahren zum Messen eines Kapazitätswertes |
US9874470B2 (en) * | 2016-01-12 | 2018-01-23 | Tank Vision, Inc. | Fuel tank level monitoring system |
TWI621984B (zh) * | 2016-12-02 | 2018-04-21 | 瑞鼎科技股份有限公司 | 電容値量測電路及電容値量測方法 |
US9853655B1 (en) * | 2017-03-01 | 2017-12-26 | Infineon Technologies Ag | Testing a capacitor array by delta charge |
US11531424B2 (en) * | 2017-09-07 | 2022-12-20 | Cypress Semiconductor Corporation | Nano-power capacitance-to-digital converter |
DE102017127145B4 (de) * | 2017-11-17 | 2021-03-04 | BEDIA Motorentechnik GmbH & Co. KG | Vorrichtung und Verfahren zur kapazitiven Messung eines Füllstands eines Füllmediums |
US11614354B2 (en) | 2018-02-13 | 2023-03-28 | Renk America Llc | Dipstick and electronic fluid level sensor |
US10693367B1 (en) * | 2019-02-19 | 2020-06-23 | Rolls-Royce North American Technologies, Inc. | Pre-charging circuit for power converters |
RU2719790C1 (ru) * | 2019-08-12 | 2020-04-23 | федеральное государственное бюджетное образовательное учреждение высшего образования "Ставропольский государственный аграрный университет" | Микроконтроллерное устройство измерения емкости для систем контроля и управления |
CN111076790B (zh) * | 2019-12-30 | 2021-06-22 | 上海科勒电子科技有限公司 | 一种液位监测方法、存储介质和电子设备 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3778708A (en) * | 1973-04-30 | 1973-12-11 | Gte Automatic Electric Lab Inc | Method of and an apparatus for measuring an electrical characteristic of a granular material |
US3993947A (en) * | 1974-09-19 | 1976-11-23 | Drexelbrook Controls, Inc. | Admittance measuring system for monitoring the condition of materials |
FR2447555A1 (fr) * | 1979-01-26 | 1980-08-22 | Jaeger | Circuit de mesure de capacite, notamment pour une jauge capacitive de niveau de liquide |
US4499766A (en) * | 1982-08-25 | 1985-02-19 | Berwind Corporation | Capacitance-type material level indicator |
US4558274A (en) * | 1983-09-14 | 1985-12-10 | Johnson Service Company | Apparatus and method determining the value of a capacitance |
US4939519A (en) * | 1986-02-03 | 1990-07-03 | Thaler Corporation | Apparatus for method and a high precision analog-to-digital converter |
DE3778094D1 (de) * | 1986-08-01 | 1992-05-14 | Siemens Ag | Verfahren und einrichtung zur erkennung der polaritaet gepolter kondensatoren. |
US5045797A (en) * | 1986-10-14 | 1991-09-03 | Drexelbrook Controls, Inc. | Continuous condition sensing system determining liquid level by admittance measurement |
US4788488A (en) * | 1986-10-14 | 1988-11-29 | Drexelbrook Controls, Inc. | Continuous condition sensing system |
FR2605731A1 (fr) * | 1986-10-27 | 1988-04-29 | Renault | Procede de mesure du niveau d'un liquide dans un reservoir et dispositif pour sa mise en oeuvre |
DE3878973D1 (de) * | 1987-04-24 | 1993-04-15 | Simmonds Precision Products | Bestimmung von elektrischer kapazitaet und elektrischem widerstand. |
US5014011A (en) * | 1988-05-31 | 1991-05-07 | Ford Motor Company | Capacitance measuring apparatus with means for nulling the resistive component |
US4942401A (en) * | 1989-02-24 | 1990-07-17 | John Fluke Mfg. Co., Inc. | Analog to digital conversion with charge balanced voltage to frequency converter having polarity responsive offset |
US5274334A (en) * | 1989-12-18 | 1993-12-28 | Honeywell Inc. | Calibrated physical parameter value measurement system |
US5059908A (en) * | 1990-05-31 | 1991-10-22 | Capital Controls Company, Inc. | Amperimetric measurement with cell electrode deplating |
US5294889A (en) * | 1992-03-27 | 1994-03-15 | Tandy Corporation | Battery operated capacitance measurement circuit |
US5446444A (en) * | 1993-12-17 | 1995-08-29 | Robertshaw Controls Company | Capacitive threshold detector test circuit |
-
1993
- 1993-09-17 US US08/123,316 patent/US5461321A/en not_active Expired - Lifetime
-
1994
- 1994-09-16 DE DE69429755T patent/DE69429755T2/de not_active Expired - Fee Related
- 1994-09-16 ES ES94114645T patent/ES2171426T3/es not_active Expired - Lifetime
- 1994-09-16 AT AT94114645T patent/ATE212726T1/de not_active IP Right Cessation
- 1994-09-16 KR KR1019940023565A patent/KR950009271A/ko not_active IP Right Cessation
- 1994-09-16 CN CN94115397A patent/CN1111355A/zh active Pending
- 1994-09-16 CA CA002132225A patent/CA2132225C/en not_active Expired - Fee Related
- 1994-09-16 AU AU73042/94A patent/AU677087B2/en not_active Ceased
- 1994-09-16 EP EP94114645A patent/EP0644432B1/de not_active Expired - Lifetime
- 1994-10-21 TW TW083109766A patent/TW247350B/zh active
-
1995
- 1995-05-15 US US08/441,140 patent/US5554937A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US5461321A (en) | 1995-10-24 |
AU7304294A (en) | 1995-03-30 |
US5554937A (en) | 1996-09-10 |
EP0644432A2 (de) | 1995-03-22 |
TW247350B (de) | 1995-05-11 |
CA2132225A1 (en) | 1995-03-18 |
AU677087B2 (en) | 1997-04-10 |
ATE212726T1 (de) | 2002-02-15 |
CA2132225C (en) | 1997-12-23 |
ES2171426T3 (es) | 2002-09-16 |
EP0644432A3 (de) | 1996-04-17 |
EP0644432B1 (de) | 2002-01-30 |
DE69429755T2 (de) | 2002-09-26 |
KR950009271A (ko) | 1995-04-21 |
CN1111355A (zh) | 1995-11-08 |
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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 |