CA1096956A - Method and apparatus for measuring the thickness of a body - Google Patents

Method and apparatus for measuring the thickness of a body

Info

Publication number
CA1096956A
CA1096956A CA301,795A CA301795A CA1096956A CA 1096956 A CA1096956 A CA 1096956A CA 301795 A CA301795 A CA 301795A CA 1096956 A CA1096956 A CA 1096956A
Authority
CA
Canada
Prior art keywords
sheet
receiver
transmitter
housing
axis
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
CA301,795A
Other languages
English (en)
French (fr)
Inventor
Pekka M. Typpo
Gunnar Wennerberg
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.)
Honeywell Measurex Corp
Original Assignee
Measurex Corp
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 US05/819,469 external-priority patent/US4107606A/en
Application filed by Measurex Corp filed Critical Measurex Corp
Application granted granted Critical
Publication of CA1096956A publication Critical patent/CA1096956A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01B7/10—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B2210/00—Aspects not specifically covered by any group under G01B, e.g. of wheel alignment, caliper-like sensors
    • G01B2210/40—Caliper-like sensors
    • G01B2210/46—Caliper-like sensors with one or more detectors on a single side of the object to be measured and with a transmitter on the other side

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Inverter Devices (AREA)
CA301,795A 1977-07-27 1978-04-24 Method and apparatus for measuring the thickness of a body Expired CA1096956A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US819,469 1977-07-27
US05/819,469 US4107606A (en) 1976-12-14 1977-07-27 Non-contacting electromagnetic thickness gauge for sheet measurement having improved small distance sensitivity

Publications (1)

Publication Number Publication Date
CA1096956A true CA1096956A (en) 1981-03-03

Family

ID=25228254

Family Applications (1)

Application Number Title Priority Date Filing Date
CA301,795A Expired CA1096956A (en) 1977-07-27 1978-04-24 Method and apparatus for measuring the thickness of a body

Country Status (5)

Country Link
JP (1) JPS5839283B2 (it)
CA (1) CA1096956A (it)
DE (1) DE2829264A1 (it)
FR (1) FR2398999A1 (it)
IT (1) IT1097875B (it)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197434A (en) * 1981-05-29 1982-12-03 Hitachi Ltd Measuring method of tension
JPS59122505U (ja) * 1983-02-07 1984-08-17 株式会社キ−エンス 二枚送り検出器の送信コイル
JPS59230136A (ja) * 1983-06-09 1984-12-24 Rohm Co Ltd 発光表示装置の光洩れ検査方法
DE3331407A1 (de) * 1983-08-31 1985-03-14 Helmut Fischer GmbH & Co Institut für Elektronik und Meßtechnik, 7032 Sindelfingen Elektromagnetische mess-sonde
JPS6166104A (ja) * 1984-09-07 1986-04-04 Anelva Corp 金属薄膜膜厚測定方法
DE3612914A1 (de) * 1986-04-17 1987-10-22 Heidelberger Druckmasch Ag Vorrichtung zum messen der dicke von papier oder dergleichen
US4813147A (en) * 1987-03-27 1989-03-21 Amp Incorporated Apparatus for interacting with both sides of a two-sided strip
DE4011646A1 (de) * 1990-04-11 1991-10-24 Micro Epsilon Messtechnik Dickenmesseinrichtung
FI103918B (fi) 1998-02-26 1999-10-15 Metso Paper Automation Oy Menetelmä ja laite liikkuvan rainan ominaisuuksien mittaamiseksi
SE517293C2 (sv) * 1999-06-30 2002-05-21 Abb Ab Förfarande och anordning för induktiv mätning av geometrisk dimension och elektrisk egenskap med motriktade magnetfält
US7205166B2 (en) * 2002-06-28 2007-04-17 Lam Research Corporation Method and apparatus of arrayed, clustered or coupled eddy current sensor configuration for measuring conductive film properties
WO2009024187A1 (fr) * 2007-08-21 2009-02-26 Thomas Edye Dispositif de mesure sans contact de l'epaisseur de films ou de couches minces en defilement
US10119837B2 (en) * 2016-07-06 2018-11-06 Biosense Webster (Israel) Ltd. Magnetic-field generating circuit for a tracking system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE480971A (it) * 1948-03-05
US2563254A (en) * 1948-05-10 1951-08-07 Hydril Corp Thickness indicator
US2665333A (en) * 1950-11-30 1954-01-05 Libbey Owens Ford Glass Co Apparatus for measuring thickness of sheet material
GB843624A (en) * 1955-12-19 1960-08-04 Roe A V & Co Ltd Improvements relating to thickness measuring instruments
US3528002A (en) * 1968-01-04 1970-09-08 Conrac Corp Caliper with air bearings for continuously moving sheet material
US3696290A (en) * 1970-07-22 1972-10-03 Hays Corp Magnetic non-contact thickness gauge with means to compensate the effects of stray fields on the gauge
SU394654A1 (ru) * 1970-12-28 1973-08-22 УСТРОЙСТВО дл ИЗМЕРЕНИЯ ТОЛЩИНЫ КРУПНОГАБАРИТНЫХ ИЗДЕЛИЙ
DE2640155C3 (de) * 1976-09-07 1982-02-11 Electronic Production Aids Co., Ltd., Worcester Park, Surrey Nach dem Wirbelstromprinzip arbeitende Meßvorrichtung zur kontinuierlichen Messung der Dicke eines sich bewegenden, aus Metall bestehenden Meßobjekts.

Also Published As

Publication number Publication date
JPS5839283B2 (ja) 1983-08-29
FR2398999B1 (it) 1985-05-17
IT1097875B (it) 1985-08-31
IT7825874A0 (it) 1978-07-19
JPS5425755A (en) 1979-02-26
FR2398999A1 (fr) 1979-02-23
DE2829264A1 (de) 1979-02-08
DE2829264C2 (it) 1989-09-28

Similar Documents

Publication Publication Date Title
US4107606A (en) Non-contacting electromagnetic thickness gauge for sheet measurement having improved small distance sensitivity
CA1096956A (en) Method and apparatus for measuring the thickness of a body
US7321229B2 (en) Inductive position sensors with secondary windings with increased or decreased number of turns
US4536709A (en) Detecting device having spaced transmitting and receiving coils for detecting a metal strip embedded in paper money
EP0661547B1 (en) DC current sensor
EP0217640B1 (en) A torque sensor of the non-contact type
US6853183B2 (en) Non-contact position sensor having helicoidal conductor forming a measuring surface covering a measuring object
US4387339A (en) Method and apparatus for measuring the spacing between the opposed surfaces of separated elements
EP0057520B1 (en) A device for detecting a magnetic strip embedded in paper
US4229696A (en) Sensor for measuring magnetic field changes
US20020089326A1 (en) Position sensor
US4899598A (en) Apparatus for measuring torque applied to a shaft
US3890564A (en) Apparatus for inducing eddy current in a semiconductor wafer for measuring the electric conductivity or resistivity thereof
KR950003207B1 (ko) 금속체변별장치(金屬體弁別裝置)
JP3339762B2 (ja) 鋼帯欠陥検出装置
US3995493A (en) Differential pressure transducer
GB1576994A (en) Apparatus for measuring the thickness of a sheet of non-magnetic material
JPH10512050A (ja) 距離センサ
GB2207510A (en) Magnetic sensor
US20060097713A1 (en) Orthogonal field magnetic DC current sensor
US5275049A (en) Multicomponent acceleration sensor
IE41700B1 (en) Improvements in and relating to a measuring probe for measuring wear
CN204129826U (zh) 一种硬币检测系统
US3379053A (en) Means for measuring mechanical stresses in magneto-strictive material
JP2651003B2 (ja) 渦電流式変位センサ

Legal Events

Date Code Title Description
MKEX Expiry