PT82544A - APPROACHES TO, AND RELATED TO, MEASURING INSTRUMENTS - Google Patents

APPROACHES TO, AND RELATED TO, MEASURING INSTRUMENTS

Info

Publication number
PT82544A
PT82544A PT82544A PT8254486A PT82544A PT 82544 A PT82544 A PT 82544A PT 82544 A PT82544 A PT 82544A PT 8254486 A PT8254486 A PT 8254486A PT 82544 A PT82544 A PT 82544A
Authority
PT
Portugal
Prior art keywords
electrical
signal
electrical signals
corresponds
optical
Prior art date
Application number
PT82544A
Other languages
Portuguese (pt)
Inventor
Philip Adrian Storey
Ralph Edward Ecclestone
Original Assignee
Pa Consulting Services
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 Pa Consulting Services filed Critical Pa Consulting Services
Publication of PT82544A publication Critical patent/PT82544A/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/50—Systems of measurement based on relative movement of target
    • G01S17/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/491—Details of non-pulse systems
    • G01S7/4912—Receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Electromagnetism (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

A laser velocimeter for measuring the relative speed of a surface and a source of coherent light directed at the said surface comprising optical and electrical means for generating two electrical signals one of which corresponds to the content of the speckle pattern produced by illumination of the surface by the light circuit means for obtaining a difference signal from the two electrical signals and frequency measuring means for determining the centre frequency of the signal spectrum of the difference signal to generate an electrical signal indicative of the relative velocity of the surface and source. The device can measure length or distance moved by integrating the velocity signal. The optical and electrical means include a grating in the path to one of two detectors or a linear array of photodetectors alternate ones of which are summed, to provide the two electrical signals one of which corresponds to the speckle pattern.
PT82544A 1985-05-10 1986-05-08 APPROACHES TO, AND RELATED TO, MEASURING INSTRUMENTS PT82544A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB858511866A GB8511866D0 (en) 1985-05-10 1985-05-10 Measuring instruments

Publications (1)

Publication Number Publication Date
PT82544A true PT82544A (en) 1986-11-28

Family

ID=10578936

Family Applications (1)

Application Number Title Priority Date Filing Date
PT82544A PT82544A (en) 1985-05-10 1986-05-08 APPROACHES TO, AND RELATED TO, MEASURING INSTRUMENTS

Country Status (5)

Country Link
EP (1) EP0221127A1 (en)
AU (1) AU5868886A (en)
GB (1) GB8511866D0 (en)
PT (1) PT82544A (en)
WO (1) WO1986006845A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63317775A (en) * 1987-06-19 1988-12-26 Omron Tateisi Electronics Co Length and speed measuring apparatus
SE9100916L (en) * 1991-03-27 1992-09-28 Nobeltech Electronics Ab Laser Detector
EP0595605A3 (en) * 1992-10-27 1996-02-21 Omron Tateisi Electronics Co Optical device for measuring speed
EP0926631A3 (en) * 1997-12-21 2000-09-06 Ascom Hasler Mailing Systems AG Measurement of paper speed using laser speckle detection
US6409294B1 (en) 1997-12-21 2002-06-25 Ascom Hasler Mailing Systems Ag Digital postage franking with coherent light velocimetry
US6220686B1 (en) 1998-02-13 2001-04-24 Ascom Hasler Mailing Systems Ag Measurement of paper speed using laser speckle detection
US6424407B1 (en) 1998-03-09 2002-07-23 Otm Technologies Ltd. Optical translation measurement
WO1999046602A1 (en) 1998-03-09 1999-09-16 Gou Lite Ltd. Optical translation measurement
GB0209053D0 (en) 2002-04-22 2002-12-18 Bae Systems Plc Method and apparatus for laser vibrometry
IL174713A0 (en) * 2006-04-02 2007-05-15 Abraham Aharoni System and method for optical sensing of surface motions
US8151646B2 (en) 2008-10-24 2012-04-10 Raytheon Company Differential mode laser detection and ranging device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3432237A (en) * 1964-03-31 1969-03-11 Singer General Precision Velocity measuring device
DE978074C (en) * 1964-06-13 1980-04-17 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Optical locating device with a device for compensating the background radiation
FR2044366A5 (en) * 1969-05-19 1971-02-19 Schnerb Gilbert
GB1330163A (en) * 1971-04-28 1973-09-12 British Aircraft Corp Ltd Measurement of fluid or surface velocities
GB1356430A (en) * 1971-08-09 1974-06-12 Rank Organisation Ltd Optical elements

Also Published As

Publication number Publication date
EP0221127A1 (en) 1987-05-13
AU5868886A (en) 1986-12-04
WO1986006845A1 (en) 1986-11-20
GB8511866D0 (en) 1985-06-19

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Legal Events

Date Code Title Description
FC3A Refusal

Effective date: 19930211