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GB1383320A - Measurement of the shape of strip material - Google Patents

Measurement of the shape of strip material

Info

Publication number
GB1383320A
GB1383320A GB3906971A GB3906971A GB1383320A GB 1383320 A GB1383320 A GB 1383320A GB 3906971 A GB3906971 A GB 3906971A GB 3906971 A GB3906971 A GB 3906971A GB 1383320 A GB1383320 A GB 1383320A
Authority
GB
United Kingdom
Prior art keywords
strip
output
photo
gate
array
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
GB3906971A
Inventor
David Robert Bosher
Charles Burns
Norman Davis
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 Iron and Steel Research Association BISRA
Original Assignee
British Iron and Steel Research Association BISRA
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 Iron and Steel Research Association BISRA filed Critical British Iron and Steel Research Association BISRA
Priority to GB3906971A priority Critical patent/GB1383320A/en
Publication of GB1383320A publication Critical patent/GB1383320A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
    • 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
    • G01B11/245—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures using a plurality of fixed, simultaneously operating transducers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

1383320 Measuring shape photo-electrically BRITISH IRON & STEEL RESEARCH ASSOCIATION 18 Aug 1972 [19 Aug 1971] 39069/71 Heading G1A The "shape" of a strip (i.e. the variation across the width of the strip of the distance measured along the surface of the strip parallel to its length between parallel transverse lines) is determined by comparing the displacements of the positions of a plurality of light beams reflected from the strip between two instants of time. Five measuring systems are utilized to monitor separate points across the width of a strip of material passing over a roller. Each system comprises a lens (11) focusing on to the strip an image of a slit (8) extending parallel to the length of the strip and illuminated by a lamp (7). The light reflected from the strip is focused by lenses (13 and 14) on to a linear integrated array (10) of 50 photo-diodes. Vertical movement of the strip causes a related displacement of the point of illumination of the photo-diode array. The array 10 is scanned by means of an oscillator 15 which also operates a gate 17 via a divider 16 to provide an output of single complete scans at spaced intervals of time. The output is stored in a first shift register 18 having a length equal to the number of diodes in the array 10, (i.e. 50). The next output scan is similarly stored in register 18 the previous scan being moved into a second shift register 19. As the third output scan is made the previous two scans are compared bit by bit by means of an exclusive OR gate 20. If the two scans are identical no output is produced but if not the exclusive OR gate 20 produces two pulses spaced by a time proportional to the displacement of the light beam incident on the photo-diode array. This time interval is measured by utilizing the two pulses to open and close a gate 22 and counting the pulses from an oscillator 21 during this interval by means of a diode pump 23 connected to a display 23. The readings corresponding to the five measuring systems may be displayed together to give an indication of the "shape" of the strip and the corresponding signals can be compared to produce a signal to control a rolling mill at the output of which the measuring system is located.
GB3906971A 1971-08-19 1971-08-19 Measurement of the shape of strip material Expired GB1383320A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3906971A GB1383320A (en) 1971-08-19 1971-08-19 Measurement of the shape of strip material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3906971A GB1383320A (en) 1971-08-19 1971-08-19 Measurement of the shape of strip material

Publications (1)

Publication Number Publication Date
GB1383320A true GB1383320A (en) 1974-02-12

Family

ID=10407452

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3906971A Expired GB1383320A (en) 1971-08-19 1971-08-19 Measurement of the shape of strip material

Country Status (1)

Country Link
GB (1) GB1383320A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2308908A1 (en) * 1975-04-25 1976-11-19 Siderurgie Fse Inst Rech Flatness defects detection and measurement - is performed for hot rolled metal sheets using optical system which forms light spots on sheets
EP0001178A1 (en) * 1977-09-09 1979-03-21 The Rank Organisation Limited An optical sensing instrument
FR2485959A1 (en) * 1980-06-13 1982-01-08 Centre Rech Metallurgique METHOD AND DEVICE FOR CONTROLLING THE PLANEITY OF METAL SHEETS
GB2133550A (en) * 1983-01-17 1984-07-25 Westinghouse Electric Corp Nuclear fuel rod straightness measuring system
GB2147697A (en) * 1983-10-05 1985-05-15 Fraunhofer Ges Forschung Level measurement method and apparatus
GB2171511A (en) * 1984-12-19 1986-08-28 Sick Optik Elektronik Erwin Optical fault seeking apparatus
EP0398563A2 (en) * 1989-05-18 1990-11-22 Corning Incorporated Fiber optic triangulation gage

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2308908A1 (en) * 1975-04-25 1976-11-19 Siderurgie Fse Inst Rech Flatness defects detection and measurement - is performed for hot rolled metal sheets using optical system which forms light spots on sheets
EP0001178A1 (en) * 1977-09-09 1979-03-21 The Rank Organisation Limited An optical sensing instrument
FR2485959A1 (en) * 1980-06-13 1982-01-08 Centre Rech Metallurgique METHOD AND DEVICE FOR CONTROLLING THE PLANEITY OF METAL SHEETS
GB2133550A (en) * 1983-01-17 1984-07-25 Westinghouse Electric Corp Nuclear fuel rod straightness measuring system
US4589082A (en) * 1983-01-17 1986-05-13 Westinghouse Electric Corp. Nuclear fuel rod straightness measuring system and method
GB2147697A (en) * 1983-10-05 1985-05-15 Fraunhofer Ges Forschung Level measurement method and apparatus
GB2171511A (en) * 1984-12-19 1986-08-28 Sick Optik Elektronik Erwin Optical fault seeking apparatus
GB2171511B (en) * 1984-12-19 1989-03-30 Sick Optik Elektronik Erwin Optical fault seeking apparatus
EP0398563A2 (en) * 1989-05-18 1990-11-22 Corning Incorporated Fiber optic triangulation gage
EP0398563A3 (en) * 1989-05-18 1991-05-08 Corning Incorporated Fiber optic triangulation gage

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Legal Events

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