GB1118879A - Improvements in or relating to speed measuring apparatus - Google Patents

Improvements in or relating to speed measuring apparatus

Info

Publication number
GB1118879A
GB1118879A GB3191364A GB3191364A GB1118879A GB 1118879 A GB1118879 A GB 1118879A GB 3191364 A GB3191364 A GB 3191364A GB 3191364 A GB3191364 A GB 3191364A GB 1118879 A GB1118879 A GB 1118879A
Authority
GB
United Kingdom
Prior art keywords
speed
strip
reference point
measured
photo
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
GB3191364A
Inventor
William Oliver Agar
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi 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 Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB3191364A priority Critical patent/GB1118879A/en
Publication of GB1118879A publication Critical patent/GB1118879A/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
    • G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1,118,879. Measuring speed photo-electrically. MARCONI CO. Ltd. July 12, 1965 [Aug. 5, 1964], No. 31913/64. Heading G1A. The invention relates to the photo-electric determination of the relative speed between a surface and a reference point. The surface may for example, be that of a moving steel strip emerging from a rolling mill, the speed being measured relative to a fixed reference point. In such a measurement, a grid pattern 3 is projected by means of a slide on to the surface of the strip 1. The light reflected back to a photocell 5 produces a noise signal containing a definite frequency component, representative of the strip speed. After amplification the signal can be measured by a frequency meter 7 or compared a local oscillator signal, the setting of which gives the speed when maximum beat frequency output is obtained. Alternatively, the projector may be dispensed with, if the strip is light emitting or receives general illumination light from the strip being focused on to an optical grid before passing to the cell. It is stated that relative speed between a fixed surface and a moving reference point may also be measured using similar apparatus.
GB3191364A 1964-08-05 1964-08-05 Improvements in or relating to speed measuring apparatus Expired GB1118879A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3191364A GB1118879A (en) 1964-08-05 1964-08-05 Improvements in or relating to speed measuring apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3191364A GB1118879A (en) 1964-08-05 1964-08-05 Improvements in or relating to speed measuring apparatus

Publications (1)

Publication Number Publication Date
GB1118879A true GB1118879A (en) 1968-07-03

Family

ID=10330265

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3191364A Expired GB1118879A (en) 1964-08-05 1964-08-05 Improvements in or relating to speed measuring apparatus

Country Status (1)

Country Link
GB (1) GB1118879A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2388278A1 (en) * 1977-04-20 1978-11-17 Marconi Co Ltd Opto-electronic timer for emergency braking system on machines - uses grid pattern and photoelectric detector-pulse counter
GB2180928A (en) * 1985-09-28 1987-04-08 Stc Plc Optical displacement sensor for timing geophones in seismic survey equipment
WO2020020846A1 (en) * 2018-07-23 2020-01-30 Air Profile GmbH Apparatus for ascertaining a velocity component of an object

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2388278A1 (en) * 1977-04-20 1978-11-17 Marconi Co Ltd Opto-electronic timer for emergency braking system on machines - uses grid pattern and photoelectric detector-pulse counter
GB2180928A (en) * 1985-09-28 1987-04-08 Stc Plc Optical displacement sensor for timing geophones in seismic survey equipment
WO2020020846A1 (en) * 2018-07-23 2020-01-30 Air Profile GmbH Apparatus for ascertaining a velocity component of an object
CN112997084A (en) * 2018-07-23 2021-06-18 艾尔普洛菲尔有限公司 Device for determining a velocity component of an object

Similar Documents

Publication Publication Date Title
GB1150502A (en) Visibility Measuring System
US3096443A (en) Electronic surface inspection system
GB1466118A (en) System for determining the nature of optical distortion in glass
GB806891A (en) Methods and apparatus for testing material
GB1082069A (en) Velocity determination
GB1118879A (en) Improvements in or relating to speed measuring apparatus
UST102104I4 (en) Scanning optical system adapted for linewidth measurement in semiconductor devices
WO1986006845A1 (en) Optical diffraction velocimeter
GB1195840A (en) Scanning Interferometer Using Wedge for Producing Fringes
JPS52150059A (en) Length measuring apparatus
GB783524A (en) Means for measuring and/or recording the air gap between the parts of a machine
GB1086158A (en) Testing for irregularities in transparent sheet material
GB1523604A (en) Method of measuring the roughness of a surface
GB1282516A (en) Improvements in or relating to methods and apparatus for measuring surface roughness
SE7404670L (en) SIGHT SATURATION DEVICE.
JPS5585207A (en) Projection location measuring device
GB1222177A (en) Improvements in or relating to fluid flow measurements
GB1123950A (en) Improvements in or relating to speed measuring apparatus
GB1406296A (en) Method and apparatus for measuring optical irregularities in an article
GB1019540A (en) A method and apparatus for determining the difference in area of an article from an article of known area
JPS5459166A (en) Visual sensibility measuring apparatus of interferometer
GB1429290A (en) Scanning
GB826846A (en) A method of and apparatus for measuring the width of an object
JPS5694248A (en) Detector for foreign matter on surface
GB1436314A (en) Apparatus for measuring the speed of light