WO1989007771A1 - Appareil optique de mesure de distance - Google Patents

Appareil optique de mesure de distance Download PDF

Info

Publication number
WO1989007771A1
WO1989007771A1 PCT/EP1988/001161 EP8801161W WO8907771A1 WO 1989007771 A1 WO1989007771 A1 WO 1989007771A1 EP 8801161 W EP8801161 W EP 8801161W WO 8907771 A1 WO8907771 A1 WO 8907771A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
signal
distance
energy
signal evaluation
Prior art date
Application number
PCT/EP1988/001161
Other languages
German (de)
English (en)
Inventor
Hans Spies
Horst Laucht
Original Assignee
Messerschmitt-Bölkow-Blohm Gesellschaft Mit Beschr
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 Messerschmitt-Bölkow-Blohm Gesellschaft Mit Beschr filed Critical Messerschmitt-Bölkow-Blohm Gesellschaft Mit Beschr
Publication of WO1989007771A1 publication Critical patent/WO1989007771A1/fr

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
    • 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
    • G01S7/497—Means for monitoring or calibrating
    • 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

Definitions

  • the invention relates to a device for optical distance measurement by means of a measuring device according to the preamble of claim 1.
  • DE-PS 3020996 discloses a device for determining the triggering distance of a missile moving towards a target, both a precise determination of the triggering distance and its use regardless of weather conditions, such as Smoke, fog, etc. allowed.
  • the energy contents of the integrators connected downstream by distance gates are fed in, while an evaluation unit checks the level of the integrator voltages.
  • filters are used as attenuators to regulate the dynamic range or a regulated, optical attenuator plate is positioned in front of the detector (DE-PS 3335869).
  • the object of the invention is to create a measuring device, primarily for distance warning systems (AUS), which not only further increases the dynamic range previously achieved, but also improves eye safety and the signal / noise ratio and minimizes the power consumption of the measuring system.
  • AUS distance warning systems
  • Figure 1 is a block diagram of an embodiment in a schematic representation.
  • 2b shows a diagram relating to the excitation of the energy in poor visibility conditions.
  • the device for optical distance measurement outlined in FIG. 1 is composed of a transmitter 11 and a receiver 13, to which a device for signal evaluation 14 is assigned.
  • a pulse or CW laser, the emitted beam 12 of which is reflected by a target or obstacle, etc., is preferably used as the transmitter 11 and is received by the receiver as a detected signal 12a and fed to the unit for signal evaluation 14.
  • This is assigned a device for signal evaluation 15, a measured variable display device 17 and a signal unit 18.
  • the former 15 carries out an evaluation with respect to distance, amplitude and eye safety, either individually or as a whole, and forwards the evaluation result as a signal to an energy control unit 16, which accordingly regulates the transmission beam 12 of the transmitter 11.
  • the output power and / or the output energy of the transmitter laser is regulated to a minimum by the energy control unit 16 in accordance with the distance of a target detected by the receiving unit 13 through the reflected beam 12a, because good visibility conditions etc. reduce the laser output power or the laser output energy.
  • the proposed distance measuring device 10 is designed such that its transmitter unit 11 is automatically switched off when a shortfall in a predetermined minimum distance is detected and that the signal evaluation 14 is also undercut when the predetermined minimum measuring conditions are undershot and / or one of them is detected Misinterpretation leading measurement condition controls the signal unit 18, through which an optical or acoustic warning signal is given.
  • the optical warning signal can optionally also be given by the measurement variable display device 17.
  • the signal unit 18 additionally performs a switching function, for example activating the low beam or the fog lights or the windshield wipers.

Landscapes

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

Abstract

Un agencement de mesure optique de distance comprend un émetteur (1) dont le signal de sortie (12), du point de vue de la puissance et/ou de l'énergie de sortie est adaptativement ajusté en fonction des conditions de mesure captées par l'unité réceptrice (13) sur la base du signal rétrodiffusé et détecté. Un mode de réalisation est décrit et illustré par les figures du dessin.
PCT/EP1988/001161 1988-02-10 1988-12-15 Appareil optique de mesure de distance WO1989007771A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3804002.6 1988-02-10
DE3804002 1988-02-10

Publications (1)

Publication Number Publication Date
WO1989007771A1 true WO1989007771A1 (fr) 1989-08-24

Family

ID=6347040

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1988/001161 WO1989007771A1 (fr) 1988-02-10 1988-12-15 Appareil optique de mesure de distance

Country Status (1)

Country Link
WO (1) WO1989007771A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0637758A1 (fr) * 1993-08-03 1995-02-08 Yamatake-Honeywell Co. Ltd. Détecteur de distance électro-optique
WO2002042792A1 (fr) * 2000-11-21 2002-05-30 Airborne Hydrography Ab Systeme et procede de mesure de la profondeur d'eau
EP1936400A1 (fr) * 2006-12-20 2008-06-25 Sick Ag Lecteur laser
EP2781981A3 (fr) * 2013-03-21 2017-11-01 LG Electronics, Inc. Robot de nettoyage et son procédé de fonctionnement
WO2020032996A2 (fr) 2018-01-10 2020-02-13 Velodyne Lidar, Inc. Mesures de distance basées sur un lidar à commande de puissance par paliers

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3898007A (en) * 1971-11-25 1975-08-05 Aga Ab Device for electro-optical distance measurement
GB2019156A (en) * 1978-04-07 1979-10-24 Agfa Gevaert Ag Camera focussing system
EP0066889A2 (fr) * 1981-06-09 1982-12-15 MITEC Mikroelektronik Mikrotechnik Informatik GmbH Dispositif de commande de la dynamique pour un appareil de mesure de distance
EP0165403A2 (fr) * 1981-02-03 1985-12-27 MITEC Mikroelektronik Mikrotechnik Informatik GmbH Procédé pour commander la dynamique d'un appareil de mesure de distance selon le principe de la mesure du temps de propagation d'une impulsion de lumière et dispositif pour la mise en oeuvre de ce procédé
US4623237A (en) * 1984-07-07 1986-11-18 Canon Kabushiki Kaisha Automatic focusing device
US4699507A (en) * 1984-03-27 1987-10-13 Nissan Motor Company, Limited Apparatus and method for measuring the distance to an object

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3898007A (en) * 1971-11-25 1975-08-05 Aga Ab Device for electro-optical distance measurement
GB2019156A (en) * 1978-04-07 1979-10-24 Agfa Gevaert Ag Camera focussing system
EP0165403A2 (fr) * 1981-02-03 1985-12-27 MITEC Mikroelektronik Mikrotechnik Informatik GmbH Procédé pour commander la dynamique d'un appareil de mesure de distance selon le principe de la mesure du temps de propagation d'une impulsion de lumière et dispositif pour la mise en oeuvre de ce procédé
EP0066889A2 (fr) * 1981-06-09 1982-12-15 MITEC Mikroelektronik Mikrotechnik Informatik GmbH Dispositif de commande de la dynamique pour un appareil de mesure de distance
US4699507A (en) * 1984-03-27 1987-10-13 Nissan Motor Company, Limited Apparatus and method for measuring the distance to an object
US4623237A (en) * 1984-07-07 1986-11-18 Canon Kabushiki Kaisha Automatic focusing device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0637758A1 (fr) * 1993-08-03 1995-02-08 Yamatake-Honeywell Co. Ltd. Détecteur de distance électro-optique
WO2002042792A1 (fr) * 2000-11-21 2002-05-30 Airborne Hydrography Ab Systeme et procede de mesure de la profondeur d'eau
EP1936400A1 (fr) * 2006-12-20 2008-06-25 Sick Ag Lecteur laser
US7589826B2 (en) 2006-12-20 2009-09-15 Sick Ag Laser scanner
EP2781981A3 (fr) * 2013-03-21 2017-11-01 LG Electronics, Inc. Robot de nettoyage et son procédé de fonctionnement
WO2020032996A2 (fr) 2018-01-10 2020-02-13 Velodyne Lidar, Inc. Mesures de distance basées sur un lidar à commande de puissance par paliers
EP3717933A4 (fr) * 2018-01-10 2021-08-18 Velodyne Lidar USA, Inc. Mesures de distance basées sur un lidar à commande de puissance par paliers
US11415681B2 (en) 2018-01-10 2022-08-16 Velodyne Lidar Usa, Inc. LIDAR based distance measurements with tiered power control

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