GB1171142A - Flaw Detector - Google Patents

Flaw Detector

Info

Publication number
GB1171142A
GB1171142A GB53752/66A GB5375266A GB1171142A GB 1171142 A GB1171142 A GB 1171142A GB 53752/66 A GB53752/66 A GB 53752/66A GB 5375266 A GB5375266 A GB 5375266A GB 1171142 A GB1171142 A GB 1171142A
Authority
GB
United Kingdom
Prior art keywords
wood
raster
flaw
sheet
gate
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
GB53752/66A
Inventor
Gerald Lester Watson
Donald Lawrence Stradley
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1171142A publication Critical patent/GB1171142A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S209/00—Classifying, separating, and assorting solids
    • Y10S209/939—Video scanning

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

1,171,142. Photo-electric inspection of sheet material; determining surface roughness; testing for surface flaws. G.L. WATSON and D. L, STRADLEY. Dec. 1, 1966 [Dec. 10, 1965], No. 53752/66. Headings G1A, G1M and G1S. Sheets of wood are automatically graded after passage through an inspection station containing a television camera whose raster scan is across the direction of movement of the sheets. A sheet of wood is appraised for flaws by counting the times the television camera signal exceeds a selected threshold, indicating a flaw of a particular severity, and the times when a camera signal exceeding the level lasts for at least two non-consecutive scans, indicating a flaw of a particular length. In the embodiment shown in Fig.3 a television camera 10 receives via mirror 58 and polarizer 60 polarized light reflected off the surface of a sheet of wood 14 carried on a moving belt 16 and scans in raster fashion the wood in a direction perpendicular to its direction of movement. The vertical and horizontal synchronization pulses of the raster respectively reset and step on a counter 64 which via pulse generator 24 opens AND gate 62 only during the 15th line of the raster permitting the camera output to pass to a selected one of level detectors A, B or C. The output of a level detector steps a counter 84, particular counts of which set actuators to classify the quality of the wood. If a flaw was detected on the 15th scan a gate 110 receives an input from a level detector and, upon the third line scan of the next raster, operates the AND gate 62 so passing the camera output to the level detector. If the flaw is still present the appropriate counter is stepped on to further downgrade the wood. An array of mechanical sensors spaced across the moving sheet may be used to gauge roughness. Two kinds of mechanical transducer are shown in Figs. 3 and 4, each comprising a serrated wheel 116 upon an arm 114 which swings over to close switch 120 upon scanning a rough patch and operates all level detectors in Fig. 3.
GB53752/66A 1965-12-10 1966-12-01 Flaw Detector Expired GB1171142A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US512874A US3389789A (en) 1965-12-10 1965-12-10 Detecting and sorting means for sheets having flaws

Publications (1)

Publication Number Publication Date
GB1171142A true GB1171142A (en) 1969-11-19

Family

ID=24040967

Family Applications (1)

Application Number Title Priority Date Filing Date
GB53752/66A Expired GB1171142A (en) 1965-12-10 1966-12-01 Flaw Detector

Country Status (5)

Country Link
US (1) US3389789A (en)
DE (1) DE1573955A1 (en)
GB (1) GB1171142A (en)
NO (1) NO120335B (en)
SE (1) SE333255B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000286A (en) * 1977-06-25 1979-01-04 Pfister Waagen Gmbh Method and device for determining quality features of a foodstuffs test object
FR2472747A1 (en) * 1979-12-29 1981-07-03 Hoesch Estel Werke Ag DEVICE FOR DETECTING FAULTS ON THE SURFACE OF A RAPIDLY MOVING BAND IN A ROLLER TRAIN
GB2175396A (en) * 1985-05-22 1986-11-26 Filler Protection Developments Apparatus for examining objects
EP0234492A2 (en) * 1986-02-22 1987-09-02 HELMUT K. PINSCH GMBH & CO. Testing device and method for the detection of differently arranged surfaces of objects
GB2307752A (en) * 1995-11-29 1997-06-04 Laser Sorter Gmbh Optical defect scanning

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1285216B (en) * 1966-07-15 1968-12-12 Rheinische Kalksteinwerke Device for sorting bulk goods
GB1240263A (en) * 1967-07-10 1971-07-21 British Insulated Callenders Improvements in or relating to testing insulated conductors
US3579249A (en) * 1969-08-08 1971-05-18 Reynolds Metals Co Feature counter having between limits amplitude and/or width discrimination
US3578904A (en) * 1968-10-15 1971-05-18 Reynolds Metals Co Feature counter with feature discrimination and/or masking
US3715476A (en) * 1969-01-16 1973-02-06 Nippon Steel Corp Method and apparatus for detecting pinholes on sheet articles
US3641257A (en) * 1970-01-16 1972-02-08 Hughes Aircraft Co Noise suppressor for surveillance and intrusion-detecting system
US3647961A (en) * 1970-04-09 1972-03-07 Western Electric Co T.v. -aided flaw detection using rotating image techniques
US3729635A (en) * 1970-10-14 1973-04-24 Lindly & Co Yarn inspector
US3694658A (en) * 1970-10-22 1972-09-26 Morvue Inc Veneer inspection system
US3689830A (en) * 1971-04-05 1972-09-05 Us Army Exploding bridgewire tester with square wave generator
GB1395147A (en) * 1971-05-06 1975-05-21 Image Analysing Computers Ltd Feature classifiaction in image analysis
US3872243A (en) * 1971-05-18 1975-03-18 Image Analysing Computers Ltd Method and apparatus for checking measurements made in image analysis systems
US3882316A (en) * 1973-05-24 1975-05-06 Smithkline Corp Quality control monitor for medicinal capsule packaging apparatus
US3911360A (en) * 1974-02-11 1975-10-07 Gene A Kimzey Variable time delay voltage dropout detector
US4011457A (en) * 1975-08-06 1977-03-08 E. I. Du Pont De Nemours And Company Web defect monitor for abrupt changes in web density
US4207472A (en) * 1975-12-05 1980-06-10 The Bendix Corporation Lumber inspection and optimization system
JPS52114212A (en) * 1976-03-22 1977-09-24 Fujitsu Ltd Information density determining circuit
FR2402868A1 (en) * 1977-09-12 1979-04-06 Usinor METHOD AND APPARATUS FOR DETECTION OF SURFACE FAULTS ON A HIGH SPEED TRAVELING BELT
US4237539A (en) * 1977-11-21 1980-12-02 E. I. Du Pont De Nemours And Company On-line web inspection system
US4173736A (en) * 1978-03-06 1979-11-06 Western Electric Company, Incorporated Capacitance detecting system and method for testing wire connections
US4205769A (en) * 1978-05-05 1980-06-03 Western Electric Company, Inc. Methods of and system for counting holes and for detecting missing holes in a web
US4287990A (en) * 1979-07-30 1981-09-08 Libbey-Owens-Ford Company Glass sheet shipping packages
US4500202A (en) * 1982-05-24 1985-02-19 Itek Corporation Printed circuit board defect detection of detecting maximum line width violations
US4578810A (en) * 1983-08-08 1986-03-25 Itek Corporation System for printed circuit board defect detection
US4675730A (en) * 1985-09-06 1987-06-23 Aluminum Company Of America Video surface inspection system
US5113454A (en) * 1988-08-19 1992-05-12 Kajaani Electronics Ltd. Formation testing with digital image analysis
US5033095A (en) * 1988-09-30 1991-07-16 Marcantonio Jeffrey J Scanning image analyzer for accumulating quantifiable contaminants of webs
US4931657A (en) * 1989-04-13 1990-06-05 Macmillan Bloedel Limited On-line texture sensing
FI110545B (en) * 1998-10-28 2003-02-14 Valtion Teknillinen Method and arrangement for measuring wood material
CA2631154A1 (en) * 2005-11-28 2007-05-31 Navy Island Plywood, Inc. Method of rating wood product quality
JP5538223B2 (en) * 2008-07-18 2014-07-02 瀬戸製材株式会社 Wood management system
US20120050522A1 (en) * 2010-08-24 2012-03-01 Research In Motion Limited Method of and apparatus for verifying assembly components of a mobile device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735017A (en) * 1956-02-14 beard ettal
US2975293A (en) * 1955-02-18 1961-03-14 Diamond Power Speciality Optical defect detector
US2947212A (en) * 1956-04-30 1960-08-02 American Brass Co Method of detecting surface conditions of sheet metal
US3019346A (en) * 1960-03-28 1962-01-30 Jones & Laughlin Steel Corp Electronic surface inspection system
US3096443A (en) * 1960-06-20 1963-07-02 Jones & Laughlin Steel Corp Electronic surface inspection system
US3264480A (en) * 1962-01-15 1966-08-02 Linen Supply Ass Of America Photoelectric inspection apparatus for material having variations in reflectivity

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000286A (en) * 1977-06-25 1979-01-04 Pfister Waagen Gmbh Method and device for determining quality features of a foodstuffs test object
GB2000286B (en) * 1977-06-25 1982-04-21 Pfister Waagen Gmbh A method of ascertaining a characteristic or characteristics of a test object formed of butchers meat
FR2472747A1 (en) * 1979-12-29 1981-07-03 Hoesch Estel Werke Ag DEVICE FOR DETECTING FAULTS ON THE SURFACE OF A RAPIDLY MOVING BAND IN A ROLLER TRAIN
GB2175396A (en) * 1985-05-22 1986-11-26 Filler Protection Developments Apparatus for examining objects
EP0206501A2 (en) * 1985-05-22 1986-12-30 Soudronic AG Apparatus for examining objects
GB2175396B (en) * 1985-05-22 1989-06-28 Filler Protection Developments Apparatus for examining objects
EP0206501A3 (en) * 1985-05-22 1989-11-02 Soudronic Ag Apparatus for examining objects
EP0234492A2 (en) * 1986-02-22 1987-09-02 HELMUT K. PINSCH GMBH & CO. Testing device and method for the detection of differently arranged surfaces of objects
EP0234492A3 (en) * 1986-02-22 1989-11-02 HELMUT K. PINSCH GMBH & CO. Testing device and method for the detection of differently arranged surfaces of objects
GB2307752A (en) * 1995-11-29 1997-06-04 Laser Sorter Gmbh Optical defect scanning

Also Published As

Publication number Publication date
NO120335B (en) 1970-10-05
SE333255B (en) 1971-03-08
US3389789A (en) 1968-06-25
DE1573955A1 (en) 1971-01-14

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