WO2009012756A2 - Système de détection muni de moyens permettant d'éviter un éblouissement du système de détection par des objets proches - Google Patents

Système de détection muni de moyens permettant d'éviter un éblouissement du système de détection par des objets proches Download PDF

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Publication number
WO2009012756A2
WO2009012756A2 PCT/DE2008/001180 DE2008001180W WO2009012756A2 WO 2009012756 A2 WO2009012756 A2 WO 2009012756A2 DE 2008001180 W DE2008001180 W DE 2008001180W WO 2009012756 A2 WO2009012756 A2 WO 2009012756A2
Authority
WO
WIPO (PCT)
Prior art keywords
section
sensor system
cross
transmitting
receiving
Prior art date
Application number
PCT/DE2008/001180
Other languages
German (de)
English (en)
Other versions
WO2009012756A3 (fr
Inventor
Christian Schaale
Original Assignee
Adc Automotive Distance Control Systems Gmbh
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 Adc Automotive Distance Control Systems Gmbh filed Critical Adc Automotive Distance Control Systems Gmbh
Priority to DE112008000815T priority Critical patent/DE112008000815A5/de
Publication of WO2009012756A2 publication Critical patent/WO2009012756A2/fr
Publication of WO2009012756A3 publication Critical patent/WO2009012756A3/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
    • G01S7/481—Constructional features, e.g. arrangements of optical elements
    • 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
    • G01S17/931—Lidar systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • 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
    • G01S7/4918—Controlling received signal intensity, gain or exposure of sensor
    • 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
    • G01S7/481—Constructional features, e.g. arrangements of optical elements
    • G01S7/4814—Constructional features, e.g. arrangements of optical elements of transmitters alone
    • 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
    • G01S7/481—Constructional features, e.g. arrangements of optical elements
    • G01S7/4816—Constructional features, e.g. arrangements of optical elements of receivers alone

Definitions

  • the invention relates to a sensor system comprising means for the suppression of strong reflections caused by nearby objects.
  • a sensor system finds e.g. Application in a motor vehicle equipped with a sensor system for environmental detection.
  • optical proximity detection sensors are known.
  • the systems are preferably based on infrared sensors.
  • the beam cross-section is generally rectangular and the civilization distribution of the transmitted beam is homogeneous in order to be able to track (track) objects with high accuracy.
  • the reflected signal depends only on the distance to the sensor system for an object.
  • the problem is that the sensor system must have a large dynamic range, which scales the power reflected by an object and then received with l / z 4 , where z indicates the distance between the sensor system and the object. This can cause the optical sensor to be blinded by nearby objects. This glare can be prevented eg by an STC (Sensitivity Time Control).
  • STC Signal Transmission Time Control
  • the receiver is set more sensitive with increasing time of flight of the sensor radiation.
  • special semiconductor components are already available, but they are very expensive.
  • the sensor system comprises a transmitter with a transmission range into which, for example, electromagnetic waves or sound waves are transmitted.
  • a receiver having a reception area is provided adjacent.
  • the transmission and reception areas overlap at least partially and this overlapping area is defined the detection range of the sensor system.
  • the transmission or reception range is referred to as transmission cross section or reception cross section of the sensor system perpendicular to a viewing direction Zs of the transmitter or a viewing direction Ze of the receiver.
  • Ze and Zs run parallel.
  • the transmission range and the reception range have a divergence in the Z direction.
  • Transmitting and receiving area are arranged so that with increasing distance to the sensor system, an overlap of the transmission cross-section and receiving cross-section is greater. In a particular embodiment, this is e.g. implemented by a along the spatial direction Z diverging transmission and reception area.
  • the viewing directions of transmitter Zs and receiver Ze are not parallel to each other and intersect at a predetermined distance z in front of the sensor system. The sensitivity of the near-object sensor system is mitigated by at least one of the following:
  • the dimensions of the transmitting cross-section or receiving cross-section decrease at least in sections in the X direction towards the receiver or transmitter.
  • sensor arrangement with transmitter, receiver, transmission range, reception range and detection range
  • Fig. 2 a) Prior art transmitting or receiving cross-section, b) exemplary embodiment of a transmitting or receiving cross-section
  • FIG. 1 shows a sensor system comprising a transmitter 1 with an associated transmission range 3, a receiver 2 with an associated reception range 4.
  • Transmitter area 3 and reception area 4 are divergent, i. they expand with increasing distance.
  • the overlapping area of transmitting area 3 and receiving area 4 is the detection area 6 of the sensor system.
  • the viewing direction of the transmitter Zs or receiver Ze is shown with a dashed line. In a preferred embodiment of the invention, Ze and Zs are parallel to each other.
  • FIG. 2 shows the cross section of a transmitting region 3 or receiving region 4.
  • the cross section is shown in a plane perpendicular to the viewing direction of the transmitter Zs or receiver Ze.
  • FIG. 2a a normal design as known in the art is shown.
  • FIG. 2 b) shows a cross section according to the invention whose dimension decreases at least in sections in the X direction. This non-state-of-the-art design can be applied to either the transmit or capture ranges, or both, to achieve the desired effect.
  • FIG. 3 shows an example of a sensor system with a transmitting cross-section 3 according to the invention and a recording cross-section 4. The overlap area 5 is hatched. On the left, the cross sections 3, 4 are shown for a small distance Z 1. Only the reduced dimensions of the transmitting cross section 3 overlap with the receiving cross section 4. For a mean distance Z3, the overlapping area 5 is substantially larger and for a large distance Z3 an almost complete overlap is achieved. the intensity or sensitivity gradually decreases in the X direction.
  • FIG. 4 alternative forms for transmitting cross sections 3 and receiving cross sections 4 are applied.
  • On the left is a comb-shaped, in the middle a diamond-shaped cross-section and on the right a V-shaped cross section.
  • the associated receiving cross section 4 or transmitting cross section 3 would be arranged in this illustration below the shapes shown and may for example have the same shape or be rectangular or take a third shape.

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)
  • Optical Radar Systems And Details Thereof (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

L'invention concerne un système de détection à émetteur et récepteur pour déterminer l'environnement d'un véhicule automobile. Ce système de détection est muni de moyens permettant d'affaiblir des reflets forts produits par des objets proches. La sensibilité du système de détection aux objets qui lui sont proches est affaiblie à l'aide d'au moins une des méthodes suivantes : réduction des dimensions de la section transversale d'émission, respectivement de la section transversale de réception, suivant la direction X vers le récepteur, respectivement depuis l'émetteur, au moins sur une certaine distance, et/ou diminution de l'intensité dans la section transversale d'émission, respectivement de la sensibilité dans la section transversale de réception, suivant la direction X vers le récepteur, respectivement depuis l'émetteur.
PCT/DE2008/001180 2007-07-24 2008-07-23 Système de détection muni de moyens permettant d'éviter un éblouissement du système de détection par des objets proches WO2009012756A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112008000815T DE112008000815A5 (de) 2007-07-24 2008-07-23 Sensorsystem mit Mitteln zur Vermeidung einer Blendung des Sensorsystems durch nahe Objekte

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007034508.0 2007-07-24
DE102007034508 2007-07-24

Publications (2)

Publication Number Publication Date
WO2009012756A2 true WO2009012756A2 (fr) 2009-01-29
WO2009012756A3 WO2009012756A3 (fr) 2009-04-02

Family

ID=40160303

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2008/001180 WO2009012756A2 (fr) 2007-07-24 2008-07-23 Système de détection muni de moyens permettant d'éviter un éblouissement du système de détection par des objets proches

Country Status (2)

Country Link
DE (1) DE112008000815A5 (fr)
WO (1) WO2009012756A2 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003002939A1 (fr) * 2001-06-26 2003-01-09 Robert Bosch Gmbh Dispositif de mesure optique de distance sur une plage de mesure etendue
WO2007107413A1 (fr) * 2006-03-23 2007-09-27 Robert Bosch Gmbh Dispositif de mesure optique de distances

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003002939A1 (fr) * 2001-06-26 2003-01-09 Robert Bosch Gmbh Dispositif de mesure optique de distance sur une plage de mesure etendue
WO2007107413A1 (fr) * 2006-03-23 2007-09-27 Robert Bosch Gmbh Dispositif de mesure optique de distances

Also Published As

Publication number Publication date
DE112008000815A5 (de) 2010-01-07
WO2009012756A3 (fr) 2009-04-02

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