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GB1489931A - Timber inspection methods and apparatus - Google Patents

Timber inspection methods and apparatus

Info

Publication number
GB1489931A
GB1489931A GB247374A GB247374A GB1489931A GB 1489931 A GB1489931 A GB 1489931A GB 247374 A GB247374 A GB 247374A GB 247374 A GB247374 A GB 247374A GB 1489931 A GB1489931 A GB 1489931A
Authority
GB
United Kingdom
Prior art keywords
timber
inspection methods
wanes
jan
detecting
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
GB247374A
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 GB247374A priority Critical patent/GB1489931A/en
Publication of GB1489931A publication Critical patent/GB1489931A/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

1489931 Detecting wanes on timber PLESSEY CO Ltd 15 Jan 1975 [18 Jan 1974] 02473/74 Heading G1A In an apparatus for detecting wanes on a moving piece of timber, the timber is illuminated from one side, and an adjacent side 13 is viewed by a lens 11 and photo diode array 10 combination. If a wane is present, a light-dark transition Fig. 2 (not shown) will occur that is detectable by the photo diode array 10 which are connected to a threshold detector 12. The timber section is moving into the plane of the paper for Fig. 4
GB247374A 1975-01-15 1975-01-15 Timber inspection methods and apparatus Expired GB1489931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB247374A GB1489931A (en) 1975-01-15 1975-01-15 Timber inspection methods and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB247374A GB1489931A (en) 1975-01-15 1975-01-15 Timber inspection methods and apparatus

Publications (1)

Publication Number Publication Date
GB1489931A true GB1489931A (en) 1977-10-26

Family

ID=9740196

Family Applications (1)

Application Number Title Priority Date Filing Date
GB247374A Expired GB1489931A (en) 1975-01-15 1975-01-15 Timber inspection methods and apparatus

Country Status (1)

Country Link
GB (1) GB1489931A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0172389A2 (en) * 1984-07-25 1986-02-26 Siemens Aktiengesellschaft Device for ascertaining the pattern and position of objects using a large surface linear photodiode array

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0172389A2 (en) * 1984-07-25 1986-02-26 Siemens Aktiengesellschaft Device for ascertaining the pattern and position of objects using a large surface linear photodiode array
EP0172389A3 (en) * 1984-07-25 1986-06-11 Siemens Aktiengesellschaft Device for ascertaining the pattern and position of objects using a large surface linear photodiode array

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Legal Events

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