FR2427577A1 - PROCESS AND APPARATUS FOR CAPACITIVE MEASUREMENT OF A WIRE, WITH AUTOMATIC CALIBRATION - Google Patents

PROCESS AND APPARATUS FOR CAPACITIVE MEASUREMENT OF A WIRE, WITH AUTOMATIC CALIBRATION

Info

Publication number
FR2427577A1
FR2427577A1 FR7910024A FR7910024A FR2427577A1 FR 2427577 A1 FR2427577 A1 FR 2427577A1 FR 7910024 A FR7910024 A FR 7910024A FR 7910024 A FR7910024 A FR 7910024A FR 2427577 A1 FR2427577 A1 FR 2427577A1
Authority
FR
France
Prior art keywords
signal
gain
thread
simulation
wire
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
FR7910024A
Other languages
French (fr)
Other versions
FR2427577B1 (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
Priority claimed from US05/898,120 external-priority patent/US4208625A/en
Application filed by MICRO SENSORS Inc filed Critical MICRO SENSORS Inc
Publication of FR2427577A1 publication Critical patent/FR2427577A1/en
Application granted granted Critical
Publication of FR2427577B1 publication Critical patent/FR2427577B1/fr
Granted 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
    • G01D18/002—Automatic recalibration
    • G01D18/006—Intermittent recalibration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to presence of irregularities in running material, e.g. for severing the material at irregularities ; Control of the correct working of the yarn cleaner
    • B65H63/062—Electronic slub detector
    • B65H63/064—Electronic slub detector using capacitor sensing means, i.e. the defect signal is a variation of impedance
    • 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
    • G01B7/12—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring diameters
    • G01B7/125—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring diameters 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
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/06—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for operation by a null method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Abstract

The thread is guided through a capacitive sensor (12B). The procedure for generating an electric signal of the measured value of the thread in which the fluctuations in gain are eliminated is as follows: simulation (92) of a predetermined thread characteristic value in the capacitive sensor (12B); generation and storage, during the simulation of the thread characteristic value, in a signal-storing device (98) of a signal (98a) which compensates gain and reproduces the required gain (100) to be applied to the signal of the measured value to generate a predetermined signal (102); termination (92) of the simulation of the thread characteristic value, and tuning of the gain (100) of the signal (18a) of the measured value of the thread in accordance with the stored signal (98a), which compensates gain, for generating a signal (20a) which is compensated against gain drift.
FR7910024A 1978-04-20 1979-04-20 PROCESS AND APPARATUS FOR CAPACITIVE MEASUREMENT OF A WIRE, WITH AUTOMATIC CALIBRATION Granted FR2427577A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/898,120 US4208625A (en) 1976-02-23 1978-04-20 Capacitive measuring system with automatic calibration

Publications (2)

Publication Number Publication Date
FR2427577A1 true FR2427577A1 (en) 1979-12-28
FR2427577B1 FR2427577B1 (en) 1984-02-24

Family

ID=25408975

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7910024A Granted FR2427577A1 (en) 1978-04-20 1979-04-20 PROCESS AND APPARATUS FOR CAPACITIVE MEASUREMENT OF A WIRE, WITH AUTOMATIC CALIBRATION

Country Status (7)

Country Link
JP (1) JPS55484A (en)
CA (1) CA1114913A (en)
CH (1) CH642168A5 (en)
DE (1) DE2915557A1 (en)
FR (1) FR2427577A1 (en)
IT (1) IT1112384B (en)
NL (1) NL7903130A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10346599A1 (en) * 2003-10-04 2005-04-21 Saurer Gmbh & Co Kg Method and device for monitoring a thread
CN113636393B (en) * 2021-07-02 2023-04-25 中国船舶重工集团公司第七一三研究所 Full-automatic micron-sized transparent film casting winding end face parallel and level control device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1485608A (en) * 1966-04-01 1967-06-23 Siderurgie Fse Inst Rech Method for calibrating analysis apparatus and implementation device
US3681577A (en) * 1970-10-30 1972-08-01 Technicon Instr Automatic calibration apparatus
US3886786A (en) * 1971-09-20 1975-06-03 Borg Warner Null memory system for a gas analysis system
DE2437438B1 (en) * 1974-08-02 1976-02-12 Fraunhofer Ges Forschung PROCESS DEVICE FOR INCREASING THE ACCURACY OF ANALOGUE MEASURING PROCEDURES WHEN REGISTERING USING DIGITAL SYSTEMS.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1485608A (en) * 1966-04-01 1967-06-23 Siderurgie Fse Inst Rech Method for calibrating analysis apparatus and implementation device
US3681577A (en) * 1970-10-30 1972-08-01 Technicon Instr Automatic calibration apparatus
US3886786A (en) * 1971-09-20 1975-06-03 Borg Warner Null memory system for a gas analysis system
DE2437438B1 (en) * 1974-08-02 1976-02-12 Fraunhofer Ges Forschung PROCESS DEVICE FOR INCREASING THE ACCURACY OF ANALOGUE MEASURING PROCEDURES WHEN REGISTERING USING DIGITAL SYSTEMS.

Also Published As

Publication number Publication date
CA1114913A (en) 1981-12-22
DE2915557A1 (en) 1979-10-31
CH642168A5 (en) 1984-03-30
NL7903130A (en) 1979-10-23
JPS55484A (en) 1980-01-05
FR2427577B1 (en) 1984-02-24
IT7921979A0 (en) 1979-04-19
IT1112384B (en) 1986-01-13

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Legal Events

Date Code Title Description
ST Notification of lapse