GB1494561A - Method for detecting and indicating obstacles to a lowflying air-borne body - Google Patents

Method for detecting and indicating obstacles to a lowflying air-borne body

Info

Publication number
GB1494561A
GB1494561A GB2300/75A GB230075A GB1494561A GB 1494561 A GB1494561 A GB 1494561A GB 2300/75 A GB2300/75 A GB 2300/75A GB 230075 A GB230075 A GB 230075A GB 1494561 A GB1494561 A GB 1494561A
Authority
GB
United Kingdom
Prior art keywords
scan
conical
obstacle
laser
spiral
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
GB2300/75A
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.)
Eltro GmbH and Co
Original Assignee
Eltro GmbH and Co
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
Priority claimed from DE19742402537 external-priority patent/DE2402537C3/en
Application filed by Eltro GmbH and Co filed Critical Eltro GmbH and Co
Publication of GB1494561A publication Critical patent/GB1494561A/en
Expired legal-status Critical Current

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
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G01S17/93—Lidar systems specially adapted for specific applications for anti-collision purposes
    • G01S17/933—Lidar systems specially adapted for specific applications for anti-collision purposes of aircraft or spacecraft
    • 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
    • G01S17/06—Systems determining position data of a target
    • G01S17/08—Systems determining position data of a target for measuring distance only
    • G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
    • 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
    • G01S17/06—Systems determining position data of a target
    • G01S17/42—Simultaneous measurement of distance and other co-ordinates

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Optical Radar Systems And Details Thereof (AREA)

Abstract

1494561 Laser rangefinder obstacle detector ELTRO GmbH GES FUR STRAHLUNGS TECHNIK 20 Jan 1975 [19 Jan 1974] 2300/75 Heading H4D A method of detecting an obstacle to a low flying aircraft carrying a laser transmitter/receiver comprises; transmitting a beam of successive laser pulses, causing the beam to scan ahead of the aircraft according to a conical scan pattern having an apical angle which is varied during the scanning operation and causing the receiver to scan ahead of the aircraft according to the same pattern so as to detected reflected laser pulses. As described, the received pulsed laser signals are displayed on a screen situated in the pilot's field of vision, e.g. C.R.T., Fig. 1 (or Fig. 2, not shown) in spiral form, when conical variation is continuous or in concentric circular form when conical variation is stepwise whereby an obstacle such as cables 4 are displayed by perceptible dot pattern 2 on screen 1. The range of the detected obstacle is detected and displayed adjacently at 8 in known manner. The rangefinder apparatus (Fig. 4) comprises laser 7, transmitting a pulsed beam along axis 1 via prisms 6A-6D through central window 3 in the receiver objective lens 2. Reflections from a target are focused by lens 2 via angled mirror 4 on to detector 5. Scanning is effected by tilting part of the optical apparatus comprising lens 2, mirror, prisms 6C and 6D about axis 9 while the whole optical apparatus is rotated about axis 1. Spiral scanning is effected by a continuous progressive tilting and fast return to the starting position using a ramp control voltage (Fig. 6, not shown) and concentric scanning using a step control voltage (Fig. 7, not shown). The spiral may be formed by a single outward scan and fast return to the optical axis of the beam on a series of a plurality of secondary spiral or concentric scan patterns may be performed, superimposed on the main conical scan, wherein the apical angle variation of the conical scan for each secondary scan pattern is small compared to that of the main scan.
GB2300/75A 1974-01-19 1975-01-20 Method for detecting and indicating obstacles to a lowflying air-borne body Expired GB1494561A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742402537 DE2402537C3 (en) 1974-01-19 Arrangement with pulse laser rangefinder for the detection of obstacles for pilots of low-flying objects

Publications (1)

Publication Number Publication Date
GB1494561A true GB1494561A (en) 1977-12-07

Family

ID=5905174

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2300/75A Expired GB1494561A (en) 1974-01-19 1975-01-20 Method for detecting and indicating obstacles to a lowflying air-borne body

Country Status (2)

Country Link
FR (1) FR2258637B3 (en)
GB (1) GB1494561A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2826468A1 (en) * 1977-06-17 1979-01-04 British Aircraft Corp Ltd LASER RANGEFINDERS
GB2123643A (en) * 1982-07-19 1984-02-01 Secr Defence Cable detection from aircraft
GB2200811A (en) * 1987-02-09 1988-08-10 Atomic Energy Authority Uk Monitoring of displacement
US5210586A (en) * 1990-06-27 1993-05-11 Siemens Aktiengesellschaft Arrangement for recognizing obstacles for pilots of low-flying aircraft
US5465142A (en) * 1993-04-30 1995-11-07 Northrop Grumman Corporation Obstacle avoidance system for helicopters and other aircraft
US7668374B2 (en) 2005-10-01 2010-02-23 Eads Deutschland Gmbh Method for supporting low-level flights
US9671094B2 (en) 2010-07-22 2017-06-06 Renishaw Plc Laser scanning apparatus and method of use

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2530343A1 (en) * 1982-07-19 1984-01-20 United Kingdom Government On-board assembly for detecting cables from an aircraft
IT1246234B (en) * 1990-09-07 1994-11-17 Selenia Ind Elettroniche DETECTOR OF SUSPENDED WIRES, PARTICULARLY SUITABLE FOR AVIONIC APPLICATIONS
FR2689251B1 (en) * 1992-03-27 1994-08-26 Thomson Csf Telemetry device and its application to an obstacle detection system.

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2826468A1 (en) * 1977-06-17 1979-01-04 British Aircraft Corp Ltd LASER RANGEFINDERS
GB2123643A (en) * 1982-07-19 1984-02-01 Secr Defence Cable detection from aircraft
GB2200811A (en) * 1987-02-09 1988-08-10 Atomic Energy Authority Uk Monitoring of displacement
US5210586A (en) * 1990-06-27 1993-05-11 Siemens Aktiengesellschaft Arrangement for recognizing obstacles for pilots of low-flying aircraft
US5465142A (en) * 1993-04-30 1995-11-07 Northrop Grumman Corporation Obstacle avoidance system for helicopters and other aircraft
US7668374B2 (en) 2005-10-01 2010-02-23 Eads Deutschland Gmbh Method for supporting low-level flights
US9671094B2 (en) 2010-07-22 2017-06-06 Renishaw Plc Laser scanning apparatus and method of use

Also Published As

Publication number Publication date
FR2258637A1 (en) 1975-08-18
FR2258637B3 (en) 1977-08-26
DE2402537A1 (en) 1975-07-31
DE2402537B2 (en) 1976-02-19

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee