WO2009015404A3 - Verfahren und vorrichtung zur ermittlung von kapazitätswerten kapazitiver sensoren - Google Patents

Verfahren und vorrichtung zur ermittlung von kapazitätswerten kapazitiver sensoren Download PDF

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Publication number
WO2009015404A3
WO2009015404A3 PCT/AT2008/000274 AT2008000274W WO2009015404A3 WO 2009015404 A3 WO2009015404 A3 WO 2009015404A3 AT 2008000274 W AT2008000274 W AT 2008000274W WO 2009015404 A3 WO2009015404 A3 WO 2009015404A3
Authority
WO
WIPO (PCT)
Prior art keywords
values
measured values
volatile memory
relative capacitance
capacitive sensors
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.)
Ceased
Application number
PCT/AT2008/000274
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English (en)
French (fr)
Other versions
WO2009015404A2 (de
Inventor
Hubert Zangl
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2009015404A2 publication Critical patent/WO2009015404A2/de
Publication of WO2009015404A3 publication Critical patent/WO2009015404A3/de
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
    • G01D18/008—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00 with calibration coefficients stored in memory
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/02—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation
    • G01D3/022—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for altering or correcting the law of variation having an ideal characteristic, map or correction data stored in a digital memory
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Technology Law (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

Eine Vorrichtung und ein Verfahren zur kalibrierten Ermittlung von Teilkapazitäten kapazitiver Sensoren mit mehreren Teilkapazitäten (Ci), mit einer Signalquelle (SG), deren Ausgangssignal den Einzelelektroden (T1, T2) eines Sensors selektiv zugeführt werden kann, mit einer Verstärkeranordnung (AMP, DEM) für an zumindest einer Elektrode (E1) abgenommene Messsignale (SE) und mit einem nichtflüchtigen Speicher (NVM), wobei die Steuer- und Auswerteschaltung (STG) sowie die Rechenschaltung (RS) dazu eingerichtet sind, in einer Kalibrierphase Messwerte (Yki) aufzunehmen, wobei die relativen Kapazitätswerte (cκi) für jedes Elektrodenpaar für wenigstens zwei Messungen bekannt sind, diese Messwerte (Yki) oder daraus abgeleitete Werte in dem nichtflüchtigen Speicher (NVM) abzulegen und in einer später folgenden Messphase in einem ersten Schritt Messwerte (YMi) aufzunehmen, aus diesen in einem weiteren Schritt einen Proportionalitätsfaktor (k) unter Verwendung wenigstens eines relativen Kapazitätswertes (cmj) zu ermitteln und in einem weiteren Schritt aus den Messwerten (YMi), dem Proportionalitätsfaktor (k) und den Werten (Yki) aus dem nichtflüchtigen Speicher oder daraus abgeleiteter Größen die relativen Kapazitätswerte (cmi) zu ermitteln.
PCT/AT2008/000274 2007-08-01 2008-08-01 Verfahren und vorrichtung zur ermittlung von kapazitätswerten kapazitiver sensoren Ceased WO2009015404A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT12052007 2007-08-01
ATA1205/2007 2007-08-01

Publications (2)

Publication Number Publication Date
WO2009015404A2 WO2009015404A2 (de) 2009-02-05
WO2009015404A3 true WO2009015404A3 (de) 2009-06-25

Family

ID=40304939

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2008/000274 Ceased WO2009015404A2 (de) 2007-08-01 2008-08-01 Verfahren und vorrichtung zur ermittlung von kapazitätswerten kapazitiver sensoren

Country Status (1)

Country Link
WO (1) WO2009015404A2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018000884A1 (de) * 2018-02-03 2019-08-08 Leopold Kostal Gmbh & Co. Kg Kapazitives Messsystem
CN117419757B (zh) * 2023-10-24 2024-10-29 中国科学院长春光学精密机械与物理研究所 基于电容传感链路的相位灵敏度标定系统及其标定方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0716308A2 (de) * 1994-12-08 1996-06-12 Ford Motor Company Limited Kalibrierungsschaltkreis für kapazitive Sensoren
US6389371B1 (en) * 1998-04-14 2002-05-14 Nagano Keiki Co., Ltd. Signal processing circuit of sensor
WO2005109040A1 (en) * 2004-04-29 2005-11-17 Zircon Corporation Sensor auto-recalibration

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0716308A2 (de) * 1994-12-08 1996-06-12 Ford Motor Company Limited Kalibrierungsschaltkreis für kapazitive Sensoren
US6389371B1 (en) * 1998-04-14 2002-05-14 Nagano Keiki Co., Ltd. Signal processing circuit of sensor
WO2005109040A1 (en) * 2004-04-29 2005-11-17 Zircon Corporation Sensor auto-recalibration

Also Published As

Publication number Publication date
WO2009015404A2 (de) 2009-02-05

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