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GB1118504A - Surface velocity measurement - Google Patents

Surface velocity measurement

Info

Publication number
GB1118504A
GB1118504A GB2778267A GB2778267A GB1118504A GB 1118504 A GB1118504 A GB 1118504A GB 2778267 A GB2778267 A GB 2778267A GB 2778267 A GB2778267 A GB 2778267A GB 1118504 A GB1118504 A GB 1118504A
Authority
GB
United Kingdom
Prior art keywords
transducers
strip
correlation detector
time delay
magnetic
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
GB2778267A
Inventor
Arthur Edward Brewster
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB2778267A priority Critical patent/GB1118504A/en
Publication of GB1118504A publication Critical patent/GB1118504A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
    • G01P3/80—Devices characterised by the determination of the time taken to traverse a fixed distance using auto-correlation or cross-correlation detection means
    • G01P3/806—Devices characterised by the determination of the time taken to traverse a fixed distance using auto-correlation or cross-correlation detection means in devices of the type to be classified in G01P3/68

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

1,118,504. Detecting inhomogeneities; measuring velocity. STANDARD TELEPHONES & CABLES Ltd. June 16, 1967, No.27782/67. Headings G1A and G1N. The velocity of a steel strip is measured by detecting variations in a surface property of the strip using two transducers spaced in the direction of travel of the strip and feeding the outputs of the transducers to a correlation detector, a time delay being included in the connection between one of the transducers and the correlation detector. Either the time delay or the spacing between the transducers is adjusted to bring the signals applied to the correlation detector into synchronism. The surface property may be reflectivity, in which case the transducers would be photodetectors arranged at locations within a uniformly illuminated portion of the strip. Alternatively, magnetic playback heads may be used to detect variations in magnetic properties. A magnetic drum recorder may be used as an adjustable time delay. The correlation detector may be a longtailed pair.
GB2778267A 1967-06-16 1967-06-16 Surface velocity measurement Expired GB1118504A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2778267A GB1118504A (en) 1967-06-16 1967-06-16 Surface velocity measurement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2778267A GB1118504A (en) 1967-06-16 1967-06-16 Surface velocity measurement

Publications (1)

Publication Number Publication Date
GB1118504A true GB1118504A (en) 1968-07-03

Family

ID=10265223

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2778267A Expired GB1118504A (en) 1967-06-16 1967-06-16 Surface velocity measurement

Country Status (1)

Country Link
GB (1) GB1118504A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2029569A (en) * 1978-09-07 1980-03-19 Standard Telephones Cables Ltd Fluid flowmeter
WO1981003708A1 (en) * 1980-06-10 1981-12-24 Broken Hill Pty Co Ltd Measurement of speed and/or length
GB2220744A (en) * 1988-07-08 1990-01-17 John Kyriakis "Non-contact measurement of speed and length"

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2029569A (en) * 1978-09-07 1980-03-19 Standard Telephones Cables Ltd Fluid flowmeter
GB2029569B (en) * 1978-09-07 1983-03-09 Standard Telephones Cables Ltd Fluid flowmeter
WO1981003708A1 (en) * 1980-06-10 1981-12-24 Broken Hill Pty Co Ltd Measurement of speed and/or length
GB2220744A (en) * 1988-07-08 1990-01-17 John Kyriakis "Non-contact measurement of speed and length"

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