GB1491241A - Methods and apparatus for profile monitoring - Google Patents

Methods and apparatus for profile monitoring

Info

Publication number
GB1491241A
GB1491241A GB247474A GB247474A GB1491241A GB 1491241 A GB1491241 A GB 1491241A GB 247474 A GB247474 A GB 247474A GB 247474 A GB247474 A GB 247474A GB 1491241 A GB1491241 A GB 1491241A
Authority
GB
United Kingdom
Prior art keywords
timber
image
slit
irregularities
jan
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
GB247474A
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.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB247474A priority Critical patent/GB1491241A/en
Publication of GB1491241A publication Critical patent/GB1491241A/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
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

1491241 Profile monitoring of timber PLESSEY CO Ltd 15 Jan 1975 [18 Jan 1974] 02474/74 Heading G1A In an apparatus for inspecting moving lengths of timber 12 for "profile" or "cross-section" irregularities, the timber is illuminated by collimated light from a light source behind a slit. The image of the slit formed across the timber 12 will be distorted by any irregularities. The image is scanned across an array or a line of photo diodes 15 by means of a rotating multiface mirror 13 and a lens 15. Different faults will distort the slit image in different ways, and the photo diodes outputs are processed by a computer circuit 18 including threshold devices which may supply a display 19. Both sides of the timber may be investigated by employing two of the above apparatuses.
GB247474A 1975-01-15 1975-01-15 Methods and apparatus for profile monitoring Expired GB1491241A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB247474A GB1491241A (en) 1975-01-15 1975-01-15 Methods and apparatus for profile monitoring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB247474A GB1491241A (en) 1975-01-15 1975-01-15 Methods and apparatus for profile monitoring

Publications (1)

Publication Number Publication Date
GB1491241A true GB1491241A (en) 1977-11-09

Family

ID=9740210

Family Applications (1)

Application Number Title Priority Date Filing Date
GB247474A Expired GB1491241A (en) 1975-01-15 1975-01-15 Methods and apparatus for profile monitoring

Country Status (1)

Country Link
GB (1) GB1491241A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2461944A1 (en) * 1979-07-20 1981-02-06 Hitachi Ltd METHOD AND APPARATUS FOR EXAMINING THE OUTER ASPECT OF A FULL CYLINDRICAL OBJECT
EP0268119A2 (en) * 1986-11-18 1988-05-25 Karl Heesemann Maschinenfabrik GmbH & Co KG Belt polishing machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2461944A1 (en) * 1979-07-20 1981-02-06 Hitachi Ltd METHOD AND APPARATUS FOR EXAMINING THE OUTER ASPECT OF A FULL CYLINDRICAL OBJECT
EP0268119A2 (en) * 1986-11-18 1988-05-25 Karl Heesemann Maschinenfabrik GmbH & Co KG Belt polishing machine
EP0268119A3 (en) * 1986-11-18 1990-03-21 Karl Heesemann Maschinenfabrik Gmbh & Co Kg Belt polishing machine

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Legal Events

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