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GB2020816B - Capacitive measuring system with automatic calibration means - Google Patents

Capacitive measuring system with automatic calibration means

Info

Publication number
GB2020816B
GB2020816B GB7913803A GB7913803A GB2020816B GB 2020816 B GB2020816 B GB 2020816B GB 7913803 A GB7913803 A GB 7913803A GB 7913803 A GB7913803 A GB 7913803A GB 2020816 B GB2020816 B GB 2020816B
Authority
GB
United Kingdom
Prior art keywords
measuring system
automatic calibration
calibration means
capacitive measuring
capacitive
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
GB7913803A
Other versions
GB2020816A (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.)
MICRO SENSORS Inc
Original Assignee
MICRO SENSORS Inc
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 MICRO SENSORS Inc filed Critical MICRO SENSORS Inc
Publication of GB2020816A publication Critical patent/GB2020816A/en
Application granted granted Critical
Publication of GB2020816B publication Critical patent/GB2020816B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/36—Textiles
    • G01N33/365—Filiform textiles, e.g. yarns
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
    • G01B7/08—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using capacitive means
    • G01B7/087—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using capacitive means for measuring of objects while moving
    • 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
    • G01D18/002—Automatic recalibration
    • G01D18/004—Continuous recalibration
    • 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
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
    • G01R17/10—AC or DC measuring bridges
    • 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)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
GB7913803A 1977-08-09 1979-04-20 Capacitive measuring system with automatic calibration means Expired GB2020816B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US82310777A 1977-08-09 1977-08-09

Publications (2)

Publication Number Publication Date
GB2020816A GB2020816A (en) 1979-11-21
GB2020816B true GB2020816B (en) 1983-02-02

Family

ID=25237821

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7913803A Expired GB2020816B (en) 1977-08-09 1979-04-20 Capacitive measuring system with automatic calibration means

Country Status (1)

Country Link
GB (1) GB2020816B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4442696A (en) * 1980-03-10 1984-04-17 Erickson Lowell H Calibration fault detector and automatic calibrator
IT1144279B (en) * 1981-07-06 1986-10-29 Cselt Centro Studi Lab Telecom PROCEDURE AND EQUIPMENT FOR MEASURING THE DIAMETER OF OPTICAL FIBERS
US5164676A (en) * 1990-12-19 1992-11-17 Emhart Industries, Inc. Machine for inspecting the wall thickness of glass bottles
CH684550A5 (en) * 1992-10-01 1994-10-14 Zellweger Uster Ag A capacitive sensor for the detection of mass and / or variations in diameter of elongated textile test material.
WO1995018357A1 (en) * 1993-12-30 1995-07-06 Honeywell Inc. Embedded programmable sensor calibration apparatus
AT405689B (en) * 1995-10-18 1999-10-25 Chemiefaser Lenzing Ag METHOD FOR DETERMINING THE MEASUREMENTS PER UNIT OF LENGTH (TITLE) OF NATURAL OR SYNTHETIC FIBERS AND DEVICE FOR IMPLEMENTING THE METHOD
FR2751407A1 (en) * 1996-07-16 1998-01-23 Motorola Semiconducteurs Threshold detector, for water level in washing machine or dish-washer
DK0970386T3 (en) 1998-01-23 2006-11-13 Tokyo Electron Ltd Impedance-to-voltage converter
EP0972205B1 (en) 1998-02-05 2006-12-13 Tokyo Electron Limited Impedance-to-voltage converter and converting method
TW526327B (en) 1998-02-19 2003-04-01 Sumitomo Metal Ind Detection apparatus and method of physical variable
US6828806B1 (en) 1999-07-22 2004-12-07 Sumitomo Metal Industries, Ltd. Electrostatic capacitance sensor, electrostatic capacitance sensor component, object mounting body and object mounting apparatus
IT1316364B1 (en) * 2000-02-11 2003-04-10 Zuccolini Livio PROCEDURE AND APPARATUS TO MEASURE THE TITLE OF THE YARNS

Also Published As

Publication number Publication date
GB2020816A (en) 1979-11-21

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Legal Events

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