EP0494815A1 - Kraftfahrzeugverkehrsmessanlage - Google Patents

Kraftfahrzeugverkehrsmessanlage Download PDF

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Publication number
EP0494815A1
EP0494815A1 EP92400027A EP92400027A EP0494815A1 EP 0494815 A1 EP0494815 A1 EP 0494815A1 EP 92400027 A EP92400027 A EP 92400027A EP 92400027 A EP92400027 A EP 92400027A EP 0494815 A1 EP0494815 A1 EP 0494815A1
Authority
EP
European Patent Office
Prior art keywords
vehicles
camera
measurement
infrared
trigger detector
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
EP92400027A
Other languages
English (en)
French (fr)
Other versions
EP0494815B1 (de
Inventor
Philippe Challe
Alain Sarignac
Gérard Barreault
Pascal Gucher
Gilles Defelix
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.)
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Renault SAS
Regie Nationale des Usines Renault
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 Renault SAS, Regie Nationale des Usines Renault filed Critical Renault SAS
Publication of EP0494815A1 publication Critical patent/EP0494815A1/de
Application granted granted Critical
Publication of EP0494815B1 publication Critical patent/EP0494815B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/04—Detecting movement of traffic to be counted or controlled using optical or ultrasonic detectors
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/052—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed

Definitions

  • the present invention relates to a system for measuring the traffic of motor vehicles on a traffic lane, comprising at least two measuring stations, spaced along said lane.
  • the present invention aims to achieve a device for measuring automobile traffic requiring no special equipment on motor vehicles.
  • each measurement station comprises a trigger detector operating by transmission / reception of a beam infra-red laser and providing a trigger signal for each reference vehicle, an infra-red light projector directing a beam on the vehicles in circulation and a camera whose shooting is triggered by the signal of the trigger detector and providing a video signal to an image analysis and data processing system that analyzes vehicle license plates to identify them and calculates vehicle travel time.
  • the measuring stations are located in height relative to the roadway, at the edge or above the track.
  • the projector consists of a discharge lamp associated with a reflector and an infrared filter, an electronic control unit and an electronic supply for the discharge lamp.
  • the trigger detector is constituted by a triangulation measurement system the transmitter of which is an infrared laser diode and the receiver of which is a photoelement associated with a lens fitted with an infrared filter and with a electronic detection of the signal received by reflection on the road or on vehicles.
  • the system comprises means of synchronization between the lightning of the infrared projector, the shooting by the CCD camera, acquisition and computer processing of images and arrival of the vehicle in the field of the camera.
  • the system according to the invention comprises two measuring stations A and B located along a traffic lane 1 and spaced apart from one another in the direction of traffic.
  • Each station comprises a shooting head 2 situated in height relative to the track, on the edge or above this track, integrating or associated with an image processing system 8.
  • Measuring stations A and B are located high above the road, at the edge or above the track.
  • Each shooting head 2 comprises a trigger detector 3, a light projector 4, and a CCD camera 5.
  • the trigger detector 3 has the function of detecting each vehicle 9 in the flow of traffic and triggering a shooting. It is placed next to camera 5 and observes the way in the same way as the camera.
  • the trigger detector 3 illustrated in FIG. 3 is based on a distance measurement by telemetry, thanks to the emission of an infrared laser beam modulated in amplitude and the detection by appropriate optics and electronics of the beam reflected by the roadway or a vehicle.
  • the trigger detector 3 operates on a triangulation principle. It is constituted by an infrared laser emitter 31 giving a focused beam 36 and amplitude modulated and by a light receiver 32 receiving the reflected beam 37 on the vehicle 5. The axes of the beams 36 and 37 make a non-zero angle between them.
  • the transmitter 31 consists of a laser diode.
  • the light receiver 32 is constituted by a lens 33, associated with a filter 35 and by a detector 34 constituted by a photodiode with two sensitive surfaces 341 and 342.
  • An electronics controls the laser diode and processes the signal coming from photodiode 34. Au rest, the reflected beam 37, reference 37 A in FIG.
  • the light projector 4 illustrated in FIG. 4 is of the infrared projector type. It comprises a discharge lamp 41 mounted on a support 42, a parabolic or spherical focusing reflector 43 and an infrared filter 44 associated with at least one lens.
  • This projector 4 emits a flash of light in the near infrared which is focused on the front of the vehicles by the reflector 43.
  • This emission of light is intended to compensate for a lack of light due to the nocturnal situations and the short time d integration of the measurement chain associated with the shooting head.
  • the emitted power is concentrated in space thanks to good focusing, and in time thanks to an impulse type emission. It also has the advantage of being almost completely invisible and therefore meets the criterion of discretion.
  • the lamp is controlled by an electronic assembly comprising a power electronics 45, a control electronics 46 and an interface electronics 47.
  • the camera 5 makes it possible to take the image of the front of the moving vehicles, detected by the trigger 3. Reading license plates requires precise image taking when the front of the vehicle is in the field of the camera.
  • Camera 5 is of the CCD type with electronic shutter. It has a low integration time and preferably works with frame transfer to obtain a better quality image.
  • the integration time time during which the image is formed on the CCD is low.
  • the camera includes a mechanical or optical shutter or an equivalent electronic function.
  • the video signal supplied by the camera 5 is sent by a link 61 to an image acquisition card 71 included in a microcomputer 8.
  • This card 71 is composed of an analog-digital converter, of one or more memory plans for image storage and possibly specialized processors providing part of the processing on the card.
  • the associated software includes a specific software for recognition of the number plates, which provides (if possible) an alphanumeric character string representing the number plate and an operating software which ensures the course of all the operations of taking pictures, detection and reading the license plate, communicating with the other station (s), or measuring and storing journey time (and other traffic information: vehicle counting, hourly statistics, etc.)
  • the projector 4, the detector 3 and the camera 5 are synchronized by a synchronization card 72 mounted in the microcomputer and connected by a link 62 to a synchronization circuit 63 of the shooting head connected to the various elements 4, 3, 5.
  • Other cards 73 and 74 respectively allow the optional connection with a screen-keyboard interface and inter-station communication.
  • the vehicle When the vehicle arrives near the station, it cuts off the infrared beam from the vehicle detector 3. The latter triggers the infra-red projector 4, the camera shoots 5 and acquires the image by the image analysis system. This identifies the vehicle by its registration number and enters the time of passage of the vehicle. It transmits this information to station B which stores it.
  • Travel time measurement systems can be implemented in a city no longer as a series of pairs of stations A and B but as a complete network.
  • the stations can be organized either in chain (figure. 6), each transmitting information to the next and receiving from the previous one, or in star (fig. 7) the information of each station being concentrated towards the same common system , or again any configuration associating these two modes of organization (fig. 8).

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)
EP19920400027 1991-01-11 1992-01-07 Kraftfahrzeugverkehrsmessanlage Expired - Lifetime EP0494815B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9100314A FR2671653B1 (fr) 1991-01-11 1991-01-11 Systeme de mesure du trafic de vehicules automobiles.
FR9100314 1991-01-11

Publications (2)

Publication Number Publication Date
EP0494815A1 true EP0494815A1 (de) 1992-07-15
EP0494815B1 EP0494815B1 (de) 1996-12-18

Family

ID=9408631

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920400027 Expired - Lifetime EP0494815B1 (de) 1991-01-11 1992-01-07 Kraftfahrzeugverkehrsmessanlage

Country Status (3)

Country Link
EP (1) EP0494815B1 (de)
DE (1) DE69215906T2 (de)
FR (1) FR2671653B1 (de)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993019441A1 (en) * 1992-03-20 1993-09-30 Commonwealth Scientific And Industrial Research Organisation An object monitoring system
EP0625767A2 (de) * 1993-03-31 1994-11-23 Siemens Aktiengesellschaft Kontrollsystem zur Überprüfung der Gebührenentrichtung von Strassenbenutzern
AT402675B (de) * 1992-09-03 1997-07-25 Schweitzer Karl Ing Einrichtung zur überwachung des verkehrs von einrichtung zur überwachung des verkehrs von kraftfahrzeugen kraftfahrzeugen
WO1998036398A1 (en) * 1997-02-12 1998-08-20 Trafficmaster Plc Methods and systems of monitoring traffic flow
NL1005785C2 (nl) * 1997-04-10 1998-10-14 Traffic Test B V Een systeem voor het uitvoeren van een inhaalcontrole bij voertuigen.
EP0877253A1 (de) * 1997-05-07 1998-11-11 Münz, Erwin Optische Geschwindigkeitsmesseinrichtung
NL1010490C2 (nl) * 1997-11-10 1999-05-18 Nederland Haarlem B V Werkwijze voor het van een groot aantal voertuigen op de openbare weg meten van de gemiddelde snelheid over een bepaald traject, inrichting voor het uitvoeren van die werkwijze, en met die werkwijze te gebruiken controlepost.
EP0945840A2 (de) 1998-03-24 1999-09-29 John B. Moetteli Verfahren zur Überwachung der Verkehrsregelung
EP0947969A2 (de) * 1998-03-30 1999-10-06 Siemens Aktiengesellschaft Einrichtung zur Fahrzeugerfassung, insbesondere Fahrzeugzählung
EP0978811A2 (de) * 1998-08-07 2000-02-09 Siemens Aktiengesellschaft Verfahren sowie Einrichtung zur Reisezeitermittlung von Kraftfahrzeugen
WO2001035372A1 (en) * 1999-11-09 2001-05-17 C.R.A.F.T. S.R.L. System for surveillance of vehicular traffic on roads and highways
EP1276086A1 (de) * 2001-07-10 2003-01-15 Romolo Donnini System zur Überwachung und Steuerung der Durchschnittsgeschwindigkeit von sich bewegenden Fahrzeugen und zur Untersuchung des Verkehrs auf Strassen und Autobahnen
GB2425385A (en) * 2005-04-18 2006-10-25 Pips Technology Ltd Vehicle speed monitoring system
CN100351875C (zh) * 2002-12-14 2007-11-28 三星Sds株式会社 用区域传感器确定车辆进退及拍摄违章车辆的方法和设备
US8218822B2 (en) 2007-05-14 2012-07-10 Pips Technology, Inc. Apparatus and method for recognizing the state of origin of a vehicle license plate
US10488492B2 (en) 2014-09-09 2019-11-26 Leddarttech Inc. Discretization of detection zone
USRE48914E1 (en) 2012-03-02 2022-02-01 Leddartech Inc. System and method for multipurpose traffic detection and characterization
USRE49342E1 (en) 2007-12-21 2022-12-20 Leddartech Inc. Distance detection method and system

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5250357A (en) * 1991-11-26 1993-10-05 Eastman Kodak Company Moisture stable elastomeric polyurethane biasable transfer members
US8242476B2 (en) 2005-12-19 2012-08-14 Leddartech Inc. LED object detection system and method combining complete reflection traces from individual narrow field-of-view channels
EP2158579B1 (de) 2007-06-18 2014-10-15 Leddartech Inc. Beleuchtungssystem mit verkehrsverwaltungsfähigkeiten
JP2010529932A (ja) 2007-06-18 2010-09-02 レッダーテック インコーポレイテッド 運転者支援機能付きの照明システム
EP2232462B1 (de) 2007-12-21 2015-12-16 Leddartech Inc. Parkverwaltungssystem und verfahren, die ein beleuchtungssystem verwenden
CA2782180C (en) 2009-12-22 2015-05-05 Leddartech Inc. Active 3d monitoring system for traffic detection
US8908159B2 (en) 2011-05-11 2014-12-09 Leddartech Inc. Multiple-field-of-view scannerless optical rangefinder in high ambient background light
WO2012172526A1 (en) 2011-06-17 2012-12-20 Leddartech Inc. System and method for traffic side detection and characterization
CN103050010B (zh) * 2012-12-31 2015-04-15 北京万集科技股份有限公司 一体式激光扫描交通情况调查装置及方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1204484A (en) * 1966-11-30 1970-09-09 Gen Electric & English Electri Improvements in or relating to road traffic systems
DE3013950A1 (de) * 1980-04-11 1981-10-15 Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen Reflexionslichtschranke, insbesondere fuer einen stellflaechensensor
FR2619944A1 (fr) * 1987-08-24 1989-03-03 Berckmans Jean Procede et dispositif d'individualisation et de reperage de vehicules
EP0347090A2 (de) * 1988-06-15 1989-12-20 Eev Limited Fahrzeugüberwachungsanlage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1204484A (en) * 1966-11-30 1970-09-09 Gen Electric & English Electri Improvements in or relating to road traffic systems
DE3013950A1 (de) * 1980-04-11 1981-10-15 Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen Reflexionslichtschranke, insbesondere fuer einen stellflaechensensor
FR2619944A1 (fr) * 1987-08-24 1989-03-03 Berckmans Jean Procede et dispositif d'individualisation et de reperage de vehicules
EP0347090A2 (de) * 1988-06-15 1989-12-20 Eev Limited Fahrzeugüberwachungsanlage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JOURNAL A. vol. 21, no. 3, Juillet 1980, ANTWERPEN BE THEUWISSEN ET AL.: 'ANALYSIS OF TRAFFIC FLOW WITH A CCD-CAMERA AND A MICROPROCESSOR' OPERATING PRINCIPLE *

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5809161A (en) * 1992-03-20 1998-09-15 Commonwealth Scientific And Industrial Research Organisation Vehicle monitoring system
WO1993019441A1 (en) * 1992-03-20 1993-09-30 Commonwealth Scientific And Industrial Research Organisation An object monitoring system
AT402675B (de) * 1992-09-03 1997-07-25 Schweitzer Karl Ing Einrichtung zur überwachung des verkehrs von einrichtung zur überwachung des verkehrs von kraftfahrzeugen kraftfahrzeugen
EP0625767A2 (de) * 1993-03-31 1994-11-23 Siemens Aktiengesellschaft Kontrollsystem zur Überprüfung der Gebührenentrichtung von Strassenbenutzern
EP0625767A3 (de) * 1993-03-31 1995-11-08 Siemens Ag Kontrollsystem zur Überprüfung der Gebührenentrichtung von Strassenbenutzern.
US6177886B1 (en) 1997-02-12 2001-01-23 Trafficmaster Plc Methods and systems of monitoring traffic flow
WO1998036398A1 (en) * 1997-02-12 1998-08-20 Trafficmaster Plc Methods and systems of monitoring traffic flow
NL1005785C2 (nl) * 1997-04-10 1998-10-14 Traffic Test B V Een systeem voor het uitvoeren van een inhaalcontrole bij voertuigen.
EP0877253A1 (de) * 1997-05-07 1998-11-11 Münz, Erwin Optische Geschwindigkeitsmesseinrichtung
NL1010490C2 (nl) * 1997-11-10 1999-05-18 Nederland Haarlem B V Werkwijze voor het van een groot aantal voertuigen op de openbare weg meten van de gemiddelde snelheid over een bepaald traject, inrichting voor het uitvoeren van die werkwijze, en met die werkwijze te gebruiken controlepost.
EP0945840A2 (de) 1998-03-24 1999-09-29 John B. Moetteli Verfahren zur Überwachung der Verkehrsregelung
EP0947969A2 (de) * 1998-03-30 1999-10-06 Siemens Aktiengesellschaft Einrichtung zur Fahrzeugerfassung, insbesondere Fahrzeugzählung
EP0947969A3 (de) * 1998-03-30 2000-09-06 Siemens Aktiengesellschaft Einrichtung zur Fahrzeugerfassung, insbesondere Fahrzeugzählung
EP0978811A3 (de) * 1998-08-07 2000-08-16 Siemens Aktiengesellschaft Verfahren sowie Einrichtung zur Reisezeitermittlung von Kraftfahrzeugen
EP0978811A2 (de) * 1998-08-07 2000-02-09 Siemens Aktiengesellschaft Verfahren sowie Einrichtung zur Reisezeitermittlung von Kraftfahrzeugen
WO2001035372A1 (en) * 1999-11-09 2001-05-17 C.R.A.F.T. S.R.L. System for surveillance of vehicular traffic on roads and highways
EP1276086A1 (de) * 2001-07-10 2003-01-15 Romolo Donnini System zur Überwachung und Steuerung der Durchschnittsgeschwindigkeit von sich bewegenden Fahrzeugen und zur Untersuchung des Verkehrs auf Strassen und Autobahnen
CN100351875C (zh) * 2002-12-14 2007-11-28 三星Sds株式会社 用区域传感器确定车辆进退及拍摄违章车辆的方法和设备
GB2425385A (en) * 2005-04-18 2006-10-25 Pips Technology Ltd Vehicle speed monitoring system
GB2425385B (en) * 2005-04-18 2007-08-01 Pips Technology Ltd Vehicle speed monitoring system
US8189048B2 (en) 2005-04-18 2012-05-29 Pips Technology Limited Vehicle speed monitoring system
US8218822B2 (en) 2007-05-14 2012-07-10 Pips Technology, Inc. Apparatus and method for recognizing the state of origin of a vehicle license plate
USRE49342E1 (en) 2007-12-21 2022-12-20 Leddartech Inc. Distance detection method and system
USRE49950E1 (en) 2007-12-21 2024-04-30 Leddartech Inc. Distance detection method and system
USRE48914E1 (en) 2012-03-02 2022-02-01 Leddartech Inc. System and method for multipurpose traffic detection and characterization
US10488492B2 (en) 2014-09-09 2019-11-26 Leddarttech Inc. Discretization of detection zone

Also Published As

Publication number Publication date
DE69215906T2 (de) 1997-06-05
FR2671653B1 (fr) 1995-05-24
EP0494815B1 (de) 1996-12-18
FR2671653A1 (fr) 1992-07-17
DE69215906D1 (de) 1997-01-30

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