GB1519323A - Device for measuring the width of a strip - Google Patents

Device for measuring the width of a strip

Info

Publication number
GB1519323A
GB1519323A GB3925475A GB3925475A GB1519323A GB 1519323 A GB1519323 A GB 1519323A GB 3925475 A GB3925475 A GB 3925475A GB 3925475 A GB3925475 A GB 3925475A GB 1519323 A GB1519323 A GB 1519323A
Authority
GB
United Kingdom
Prior art keywords
strip
strip width
scan
pulses
grating
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
GB3925475A
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.)
BETR FORSCH INST ANGEW FORSCH
BFI VDEH Institut fuer Angewandte Forschung GmbH
Original Assignee
BETR FORSCH INST ANGEW FORSCH
BFI VDEH Institut fuer Angewandte Forschung GmbH
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 BETR FORSCH INST ANGEW FORSCH, BFI VDEH Institut fuer Angewandte Forschung GmbH filed Critical BETR FORSCH INST ANGEW FORSCH
Publication of GB1519323A publication Critical patent/GB1519323A/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
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/04—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
    • G01B11/046—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring width

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

1519323 Strip width measurement BETRIEBSFORSCHUNGSINSTITUT VDEH - INSTITUT FUR ANGEWANDTE FORSCHUNG GmbH 25 Sept 1975 [26 Sept 1974] 39254/75 Heading G1A Apparatus for strip width measurement comprises means 8 to scan strip 1 with a focused light beam and a grating 11 of alternate opaque, 12, and transparent portions on to which lens 10 focuses the reflected beam such that it scans it transversely, means 13 to produce pulses in accordance with the resulting modulations of the beam, and evaluation means 14 giving an output signal dependent on the number of pulses in each scan. Via prism 5 and lens system 6, 7 a line image 0À5 mm wide is provided from a wider beam from laser 4, and made by revolving mirror system 8 to scan the strip width. The grating line spacings and widths are equal. Pulses from photo-multiplier 13 pass to electronic module 14 and indicator 15. The strip width = (a/f-1) g.n., where a is the distance from strip 1 to lens 10 of focal length f, g the centre to centre grating line spacing and n the number of pulses per scan. In the embodiment of Fig. 2 (not shown), two gratings with detectors and at different distances from the strip are used to correct for alteration of the strip/grating distance. The correct strip width is given approximately by b 2 -(b 1 -b 2 ) a/c, where b 1 and b2 are the apparent strip width values obtained at distances a and c respectively.
GB3925475A 1974-09-26 1975-09-25 Device for measuring the width of a strip Expired GB1519323A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742445853 DE2445853A1 (en) 1974-09-26 1974-09-26 DEVICE FOR MEASURING THE WIDTH OF TAPES

Publications (1)

Publication Number Publication Date
GB1519323A true GB1519323A (en) 1978-07-26

Family

ID=5926718

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3925475A Expired GB1519323A (en) 1974-09-26 1975-09-25 Device for measuring the width of a strip

Country Status (7)

Country Link
BE (1) BE833839A (en)
DE (1) DE2445853A1 (en)
FR (1) FR2286367A1 (en)
GB (1) GB1519323A (en)
IT (1) IT1048496B (en)
LU (1) LU73450A1 (en)
NL (1) NL7511355A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0165385A2 (en) * 1984-04-21 1985-12-27 ELTRO GmbH Gesellschaft für Strahlungstechnik Process and circuit for the distance and angle independent measurement of equal distance points from a common reference point

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3612036A1 (en) * 1986-04-10 1987-10-15 Wurster & Dietz Gmbh U Co Masc Method and device for measuring tree stems (trunks)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0165385A2 (en) * 1984-04-21 1985-12-27 ELTRO GmbH Gesellschaft für Strahlungstechnik Process and circuit for the distance and angle independent measurement of equal distance points from a common reference point
EP0165385A3 (en) * 1984-04-21 1986-12-10 ELTRO GmbH Gesellschaft für Strahlungstechnik Process and circuit for the distance and angle independent measurement of equal distance points from a common reference point

Also Published As

Publication number Publication date
BE833839A (en) 1976-01-16
FR2286367A1 (en) 1976-04-23
LU73450A1 (en) 1976-04-13
NL7511355A (en) 1976-03-30
DE2445853A1 (en) 1976-04-22
IT1048496B (en) 1980-11-20

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Legal Events

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