GB2021762A - Improvements in determining the dimensions of workpieces - Google Patents

Improvements in determining the dimensions of workpieces

Info

Publication number
GB2021762A
GB2021762A GB7917278A GB7917278A GB2021762A GB 2021762 A GB2021762 A GB 2021762A GB 7917278 A GB7917278 A GB 7917278A GB 7917278 A GB7917278 A GB 7917278A GB 2021762 A GB2021762 A GB 2021762A
Authority
GB
United Kingdom
Prior art keywords
workpiece
positions
width
image
signals
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
GB7917278A
Other versions
GB2021762B (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.)
British Steel Corp
Original Assignee
British Steel 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
Application filed by British Steel Corp filed Critical British Steel Corp
Priority to GB7917278A priority Critical patent/GB2021762B/en
Publication of GB2021762A publication Critical patent/GB2021762A/en
Application granted granted Critical
Publication of GB2021762B publication Critical patent/GB2021762B/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
    • G01B11/024—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by means of diode-array scanning
    • 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
    • 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
    • G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
    • G01B11/0691—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of objects while moving

Landscapes

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

Abstract

The width and/or the thickness of a workpiece is measured by using T.V. cameras, which have photo diode arrays, to view a plane of the workpiece 3 at two positions 1, 2 displaced vertically above a datum. The resulting signals indicative of the angle subtended by the workpiece at the image positions are representative of the image widths Wa1 Wa2 apparent at these positions. These signals are fed to a microprocessor (Fig. 2) where the two "apparent" width signals are combined, to provide product and difference components that are used to calculate the true workpiece width and/or the workpiece thickness by using disclosed formulae. <IMAGE>
GB7917278A 1978-05-17 1979-05-17 Determining the dimensions of workpieces Expired GB2021762B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7917278A GB2021762B (en) 1978-05-17 1979-05-17 Determining the dimensions of workpieces

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2020078 1978-05-17
GB7917278A GB2021762B (en) 1978-05-17 1979-05-17 Determining the dimensions of workpieces

Publications (2)

Publication Number Publication Date
GB2021762A true GB2021762A (en) 1979-12-05
GB2021762B GB2021762B (en) 1982-09-02

Family

ID=26254527

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7917278A Expired GB2021762B (en) 1978-05-17 1979-05-17 Determining the dimensions of workpieces

Country Status (1)

Country Link
GB (1) GB2021762B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0029748B1 (en) * 1979-11-26 1986-05-14 European Electronic Systems Limited Optical measuring system
EP0238469A2 (en) * 1986-03-19 1987-09-23 Svecia Silkscreen Maskiner AB An arrangement for establishing the thickness of print applied to a print carrier
EP0289084A2 (en) * 1987-04-22 1988-11-02 John Lysaght (Australia) Ltd. Non-contact determination of the position of a rectilinear feature of an article
EP0666979A1 (en) * 1992-10-30 1995-08-16 Gerald Ray Richert Product discrimination system and method therefor
EP0903681A1 (en) * 1997-09-17 1999-03-24 Datalogic S.P.A. Apparatus and process for detecting the presence and the size of an object
WO1999049277A1 (en) * 1998-03-25 1999-09-30 Crisplant A/S An optical sensor system for incorporation in a conveyor system and a method for determining the geometry and/or angular position of a moving object
US6369892B2 (en) 1998-06-19 2002-04-09 Gerald R. Richert Method for discrimination of produce
US6572019B1 (en) 1994-07-19 2003-06-03 Psc Scanning, Inc. Compact scanner module mountable to pointing instrument
EP3207331A4 (en) * 2014-10-14 2018-05-30 Electronics for Imaging, Inc. Differential lighting

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0029748B1 (en) * 1979-11-26 1986-05-14 European Electronic Systems Limited Optical measuring system
EP0238469A2 (en) * 1986-03-19 1987-09-23 Svecia Silkscreen Maskiner AB An arrangement for establishing the thickness of print applied to a print carrier
EP0238469A3 (en) * 1986-03-19 1990-01-17 Svecia Silkscreen Maskiner AB An arrangement for establishing the thickness of print applied to a print carrier
EP0289084A2 (en) * 1987-04-22 1988-11-02 John Lysaght (Australia) Ltd. Non-contact determination of the position of a rectilinear feature of an article
EP0289084A3 (en) * 1987-04-22 1990-09-26 John Lysaght (Australia) Limited Non-contact determination of the position of a rectilinear feature of an article
EP0666979A4 (en) * 1992-10-30 1996-11-20 Gerald Ray Richert Product discrimination system and method therefor.
EP0666979A1 (en) * 1992-10-30 1995-08-16 Gerald Ray Richert Product discrimination system and method therefor
US6572019B1 (en) 1994-07-19 2003-06-03 Psc Scanning, Inc. Compact scanner module mountable to pointing instrument
EP0903681A1 (en) * 1997-09-17 1999-03-24 Datalogic S.P.A. Apparatus and process for detecting the presence and the size of an object
US6102291A (en) * 1997-09-17 2000-08-15 Datalogic, S.P.A. Apparatus and process for detecting the presence and encumbrance of an object
WO1999049277A1 (en) * 1998-03-25 1999-09-30 Crisplant A/S An optical sensor system for incorporation in a conveyor system and a method for determining the geometry and/or angular position of a moving object
US6369892B2 (en) 1998-06-19 2002-04-09 Gerald R. Richert Method for discrimination of produce
US6400833B1 (en) 1998-06-19 2002-06-04 Oms-Optical Measuring Systems Method and apparatus for discrimination of product units from spread spectrum images of thin portions of product units
EP3207331A4 (en) * 2014-10-14 2018-05-30 Electronics for Imaging, Inc. Differential lighting

Also Published As

Publication number Publication date
GB2021762B (en) 1982-09-02

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Legal Events

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