FR2431705A1 - Low power consumption aircraft ground speed meter - uses calculation from auto-correlation of electronic images of ground - Google Patents

Low power consumption aircraft ground speed meter - uses calculation from auto-correlation of electronic images of ground

Info

Publication number
FR2431705A1
FR2431705A1 FR7821712A FR7821712A FR2431705A1 FR 2431705 A1 FR2431705 A1 FR 2431705A1 FR 7821712 A FR7821712 A FR 7821712A FR 7821712 A FR7821712 A FR 7821712A FR 2431705 A1 FR2431705 A1 FR 2431705A1
Authority
FR
France
Prior art keywords
ground
auto
correlation
power consumption
electronic images
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.)
Granted
Application number
FR7821712A
Other languages
French (fr)
Other versions
FR2431705B1 (en
Inventor
Jean Dansac
Christian Pepin
Philippe Heuze
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Priority to FR7821712A priority Critical patent/FR2431705A1/en
Publication of FR2431705A1 publication Critical patent/FR2431705A1/en
Application granted granted Critical
Publication of FR2431705B1 publication Critical patent/FR2431705B1/fr
Granted 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)
  • Focusing (AREA)

Abstract

The system provides lower power consumption and greater compactness compared with existing radar systems by detecting ambient visible or infra-red radiation from the ground. Electronic images of zones of the ground in front of (SA) and to the rear of (SB) the aircraft are obtained by scanning arrays of charge coupled device photodetectors onto which objective lenses focus the light. The photodetectors are read in synchronisation and the video signals are digitally encoded and entered in memories prior to auto-correlation. Real time aircraft speed is obtained from geometric data (h, THETA) and the measured delay time given by the image comparator. Each photodetector cell supplies information to its own memory cell which permits scanning and speed measurement in both the x and y directions.
FR7821712A 1978-07-21 1978-07-21 Low power consumption aircraft ground speed meter - uses calculation from auto-correlation of electronic images of ground Granted FR2431705A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7821712A FR2431705A1 (en) 1978-07-21 1978-07-21 Low power consumption aircraft ground speed meter - uses calculation from auto-correlation of electronic images of ground

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7821712A FR2431705A1 (en) 1978-07-21 1978-07-21 Low power consumption aircraft ground speed meter - uses calculation from auto-correlation of electronic images of ground

Publications (2)

Publication Number Publication Date
FR2431705A1 true FR2431705A1 (en) 1980-02-15
FR2431705B1 FR2431705B1 (en) 1983-02-18

Family

ID=9211043

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7821712A Granted FR2431705A1 (en) 1978-07-21 1978-07-21 Low power consumption aircraft ground speed meter - uses calculation from auto-correlation of electronic images of ground

Country Status (1)

Country Link
FR (1) FR2431705A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583882A1 (en) * 1985-06-25 1986-12-26 Renault Device for measuring the speed and position of a moving object with respect to the ground
WO2004027434A1 (en) * 2002-09-23 2004-04-01 Stefan Reich Measuring and stabilising system for machine-controllable vehicles
DE102006017753A1 (en) * 2006-04-11 2007-10-18 Visolux Zweigniederlassung Der Pepperl + Fuchs Gmbh Optical sensor for detecting relative movement of e.g. falling object, has receiver provided with switching circuit for optical navigation, where speed switching threshold per teach-in or potentiometer of switching output is adjustable
DE10258545B4 (en) * 2002-09-23 2008-01-24 Stefan Reich Method and system for stabilizing a translation motion size of a missile

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2866373A (en) * 1954-01-11 1958-12-30 Fairchild Camera Instr Co Image-velocity responsive system
US2995662A (en) * 1958-09-29 1961-08-08 Chicago Aerial Ind Inc Radiation responsive apparatus
US3525568A (en) * 1967-12-11 1970-08-25 Marc G Dreyfus Airborne electro-optical systems and apparatus for indicating true aircraft velocity and altitude
FR2135332A1 (en) * 1971-05-05 1972-12-15 Hasler Ag
US3942022A (en) * 1974-10-25 1976-03-02 Itek Corporation Rapid response correlation type image motion sensor
US4064533A (en) * 1975-10-24 1977-12-20 Westinghouse Electric Corporation CCD focal plane processor for moving target imaging

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2866373A (en) * 1954-01-11 1958-12-30 Fairchild Camera Instr Co Image-velocity responsive system
US2995662A (en) * 1958-09-29 1961-08-08 Chicago Aerial Ind Inc Radiation responsive apparatus
US3525568A (en) * 1967-12-11 1970-08-25 Marc G Dreyfus Airborne electro-optical systems and apparatus for indicating true aircraft velocity and altitude
FR2135332A1 (en) * 1971-05-05 1972-12-15 Hasler Ag
US3942022A (en) * 1974-10-25 1976-03-02 Itek Corporation Rapid response correlation type image motion sensor
US4064533A (en) * 1975-10-24 1977-12-20 Westinghouse Electric Corporation CCD focal plane processor for moving target imaging

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583882A1 (en) * 1985-06-25 1986-12-26 Renault Device for measuring the speed and position of a moving object with respect to the ground
WO2004027434A1 (en) * 2002-09-23 2004-04-01 Stefan Reich Measuring and stabilising system for machine-controllable vehicles
FR2849223A1 (en) * 2002-09-23 2004-06-25 Stefan Johannes Reich MEASUREMENT AND STABILIZATION SYSTEM FOR VEHICLES AND FLYING OBJECTS
DE10258545B4 (en) * 2002-09-23 2008-01-24 Stefan Reich Method and system for stabilizing a translation motion size of a missile
US7400950B2 (en) 2002-09-23 2008-07-15 Stefan Reich Optical sensing system and system for stabilizing machine-controllable vehicles
DE102006017753A1 (en) * 2006-04-11 2007-10-18 Visolux Zweigniederlassung Der Pepperl + Fuchs Gmbh Optical sensor for detecting relative movement of e.g. falling object, has receiver provided with switching circuit for optical navigation, where speed switching threshold per teach-in or potentiometer of switching output is adjustable

Also Published As

Publication number Publication date
FR2431705B1 (en) 1983-02-18

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Legal Events

Date Code Title Description
ST Notification of lapse