PT82544A - APPROACHES TO, AND RELATED TO, MEASURING INSTRUMENTS - Google Patents
APPROACHES TO, AND RELATED TO, MEASURING INSTRUMENTSInfo
- 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
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.
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)
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 |
US5557395A (en) * | 1992-10-27 | 1996-09-17 | Omron Corporation | 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 |
US6220686B1 (en) | 1998-02-13 | 2001-04-24 | 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 |
WO1999046602A1 (en) | 1998-03-09 | 1999-09-16 | Gou Lite Ltd. | Optical translation measurement |
US6424407B1 (en) | 1998-03-09 | 2002-07-23 | Otm Technologies 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)
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 |
-
1985
- 1985-05-10 GB GB858511866A patent/GB8511866D0/en active Pending
-
1986
- 1986-05-08 AU AU58688/86A patent/AU5868886A/en not_active Abandoned
- 1986-05-08 PT PT82544A patent/PT82544A/en not_active Application Discontinuation
- 1986-05-08 EP EP86902876A patent/EP0221127A1/en not_active Withdrawn
- 1986-05-08 WO PCT/GB1986/000246 patent/WO1986006845A1/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
AU5868886A (en) | 1986-12-04 |
EP0221127A1 (en) | 1987-05-13 |
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 |