EP0318260A2 - Moyens de surveillance - Google Patents

Moyens de surveillance Download PDF

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Publication number
EP0318260A2
EP0318260A2 EP88311069A EP88311069A EP0318260A2 EP 0318260 A2 EP0318260 A2 EP 0318260A2 EP 88311069 A EP88311069 A EP 88311069A EP 88311069 A EP88311069 A EP 88311069A EP 0318260 A2 EP0318260 A2 EP 0318260A2
Authority
EP
European Patent Office
Prior art keywords
detectors
traffic
detector
length
monitoring system
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.)
Withdrawn
Application number
EP88311069A
Other languages
German (de)
English (en)
Other versions
EP0318260A3 (fr
Inventor
Charles David Coe
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.)
Combustion Developments Ltd
Original Assignee
Combustion Developments Ltd
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 Combustion Developments Ltd filed Critical Combustion Developments Ltd
Publication of EP0318260A2 publication Critical patent/EP0318260A2/fr
Publication of EP0318260A3 publication Critical patent/EP0318260A3/fr
Withdrawn legal-status Critical Current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
    • G08G1/015—Detecting movement of traffic to be counted or controlled with provision for distinguishing between two or more types of vehicles, e.g. between motor-cars and cycles

Definitions

  • This invention relates to monitoring means and is particularly, but not necessarily exclusively, concerned with the monitoring of road traffic.
  • the object of the present invention is to provide an effective means of monitoring, e.g. traffic, that avoids the disadvantages mentioned above
  • a monitoring system comprises at least two radiation detection means set in longitudinal spaced relationship in alignment with an intended direction of movement of objects passing below the radiation detection means, each detector being adapted to produce a signal pulse that is a function of the length and speed of an object passing below the detectors, and the at least two detectors being connected to processor means adapted to store and compare the signal pulses generated by each detector.
  • the monitoring system of the invention can be passive in the sense of providing two detectors to receive incoming infrared radiation that occurs naturally. In the absence of any objects passing below the detectors, the detectors receive incoming radiation at a constant rate and as an object or a succession of objects passes below the detectors, incoming radiation to the detectors is disturbed, such as by the heat generated by the object or by light reflected from the object. As a result, the detectors generate the signal pulses that are effected to the processor means. It would be equally possible that the monitoring system is active and where an emitter for infrared radiation is provided with the detector receiving infrared radiation reflected back from the object. In the latter instance it would be desirable to use a single emitter/detector.
  • two detectors can be set above a road or above a carriageway of a motorway for example by securing the detectors on the underside of a bridge or other structure spanning a road or carriageway and contained in weatherproof housings.
  • the detectors may be connected to a suitable microprocessor means also in a weatherproof housing and located in close proximity to the detectors and which may be of the type that have a removable memory, or can be connected to processor means at a remote location.
  • a pulse is generated of a shape and length that is a function of the length and speed of the vehicle, and that pulse is passed to the processor means, and as that first vehicle passes below the second detector a sufficiently similar pulse is created and also fed to the processor means.
  • the processor means able to recognise the pulse shape the time delay between the first and second pulses reaching the processor serves to provide a record of the speed of the vehicle, thereby providing a first ability to record not only the volume of traffic passing along that road or carriageway but also its speed.
  • the pulse from each detector is passed to the processor, and which can sense the time delay between the pulses of the first and second vehicles, and, in conjunction with the speed of two successive vehicles, generate information regarding the spacing of successive vehicles.
  • the processor means can be preprogrammed to distinguish between different lengths of pulse and hence different lengths of vehicle.
  • two length parameters can be provided to record the number of vehicles of a length smaller than the first parameter, of a length between the two parameters and of a length greater than the larger parameter, and from which can be derived a reasonable presumption that the majority of the vehicles in the group of smallest length will be cars, the majority in the group of intermediate length will be vans, and the majority in the group of largest length will be lorries.
  • the invention admits that this will not be totally accurate in the sense that some cars are of greater length than some vans and some vans are of greater length than some lorries, however the invention still provides for the first time a reasonably accurate assessment of the nature of traffic using a particular road or motorway.
  • the monitoring means of the invention can be connected into the signal systems on, e.g. motorways.
  • suitable warning signals can be activated alongside the road or motorway.
  • the monitoring means could equally be connected into traffic light control along a roadway or at an access to a motorway to prevent movement of additional traffic along that roadway or access to that part of a motorway when the monitoring means of the invention senses a heavy congestion of traffic.
  • a still further possibility is the recognition of a progressive slowing down of vehicles using a particular stretch of road or motorway, and in the absence of a known condition such as roadworks the monitoring device again used to activate warning signals to indicate an unexpected problem ahead, such as, perhaps, an accident.
  • two radiation detectors 1, 2 are provided, each connected via a two-channel ADC 3 to a respective ring memory 4, 5, the memory paths of which are of sufficient length to ensure that the signals from the two detectors relating to the same vehicle can be fed to a displacement correlator 6, before information concerning second or subsequent vehicles erases from the ring memories the information concerning the first vehicle.
  • Information from the displacement correlator is fed to a data processor 7 programmed in connection with one or several output functions required of the monitor, and which can be passed to a bidirectional communications link 8 for transmission to an analytical or control central computer.
  • each will generate a pulse of a shape and length that is a function of the speed and length of the vehicle, and which can be recognised by the displacement correlator 6 and the data processor as relating to the same vehicle.
  • a first important function is an output from the data processor characterising the vehicles as belonging to one of three length groups, those smaller a first set length and which can be assumed to be cars, those between the two set lengths and which can be assumed to be vans, and those larger than the second set length and which can be assumed to be lorries.
  • Information concerning the nature or make-up of traffic using a particular road or motorway can thereby be readily available to an analytical computer associated with the bidirectional communications link 8.
  • the speed of successive vehicles and the distance between successive vehicles can be monitored, and in any circumstance where the speed and distance signify that excessive speeds are involved or the distance between successive vehicles too short for said speeds and known prevailing conditions, a control computer associated with the bidirectional communications link can activate suitable warning signals located along the road or motorway beyond the position of the detectors.
  • the data processor can recognise a progressive slowing down of vehicles passing the detectors or that vehicles have come to a standstill, and on any stretch of road or motorway where a known disturbance to traffic flow does not exist, e.g. roadworks, an alarm situation can be signalled to a control computer via the bidirectional communications link to activate warning signals located along the road or motorway in advance of the detectors to advise road users of an unexpected hazard ahead.
  • the nature of the data processor may be such that it can perform all of its intended functions simultaneously or selectively.
  • the data processor can be reset and signalled as required for it to perform any one of or any combination of the functions it is able to perform.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)
EP88311069A 1987-11-27 1988-11-23 Moyens de surveillance Withdrawn EP0318260A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8727824 1987-11-27
GB878727824A GB8727824D0 (en) 1987-11-27 1987-11-27 Monitoring means

Publications (2)

Publication Number Publication Date
EP0318260A2 true EP0318260A2 (fr) 1989-05-31
EP0318260A3 EP0318260A3 (fr) 1990-07-04

Family

ID=10627640

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88311069A Withdrawn EP0318260A3 (fr) 1987-11-27 1988-11-23 Moyens de surveillance

Country Status (2)

Country Link
EP (1) EP0318260A3 (fr)
GB (1) GB8727824D0 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4135874C1 (en) * 1991-10-31 1992-09-17 Ant Nachrichtentechnik Gmbh, 7150 Backnang, De Traffic volume detection circuit - incorporates directional antenna with band-pass filter, frequency-voltage converter and pulse shaper
US5317311A (en) * 1988-11-14 1994-05-31 Martell David K Traffic congestion monitoring system
EP0612049A1 (fr) * 1993-02-15 1994-08-24 STN ATLAS Elektronik GmbH Procédé de classification de véhicules passant en un point prédéterminé de la route
FR2714755A1 (fr) * 1994-01-04 1995-07-07 Le Parquier Guy Dispositif de captation et de recueil du flux de circulation automobile.
EP0896313A1 (fr) * 1998-04-08 1999-02-10 Graziano Gaggioli Equipement pour signaler la circulation de véhicules sur autoroutes, autostrades, rues à sens unique et similaires
EP1296302A1 (fr) * 2001-09-20 2003-03-26 Alma Mater Studiorum -Universita' di Bologna Système, unité centrale et procédé de surveillance du trafic
CN104504911A (zh) * 2013-12-25 2015-04-08 安徽宝龙环保科技有限公司 一种机动车测速装置及测速方法
USRE47134E1 (en) 2011-05-11 2018-11-20 Leddartech Inc. Multiple-field-of-view scannerless optical rangefinder in high ambient background light
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 (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6560461B1 (en) 1997-08-04 2003-05-06 Mundi Fomukong Authorized location reporting paging system
WO2008154736A1 (fr) 2007-06-18 2008-12-24 Leddartech Inc. Système d'éclairage à fonctions d'assistance au conducteur
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
CA2691141C (fr) 2007-06-18 2013-11-26 Leddartech Inc. Systeme d'eclairage avec fonctions de gestion de trafic
EP2232462B1 (fr) 2007-12-21 2015-12-16 Leddartech Inc. Système et procédé de gestion de stationnement utilisant un système d'éclairage
CN102959599B (zh) 2009-12-22 2015-07-15 莱达科技股份有限公司 用于交通检测的主动3d监控系统
US9378640B2 (en) 2011-06-17 2016-06-28 Leddartech Inc. System and method for traffic side detection and characterization

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2557185A1 (de) * 1974-12-26 1976-07-08 Matra Engins Vorrichtung zur ermittlung des strassenverkehrs
FR2523341A1 (fr) * 1982-03-15 1983-09-16 Techno 2000 Dispositif d'analyse de trafic de vehicules sur une chaussee
GB2154388A (en) * 1984-02-14 1985-09-04 Secr Defence Image processing system
EP0171098A1 (fr) * 1984-07-02 1986-02-12 Koninklijke Philips Electronics N.V. Procédé pour commander un système de contrôle du trafic et système de contrôle du trafic pour l'usage du procédé

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2557185A1 (de) * 1974-12-26 1976-07-08 Matra Engins Vorrichtung zur ermittlung des strassenverkehrs
FR2523341A1 (fr) * 1982-03-15 1983-09-16 Techno 2000 Dispositif d'analyse de trafic de vehicules sur une chaussee
GB2154388A (en) * 1984-02-14 1985-09-04 Secr Defence Image processing system
EP0171098A1 (fr) * 1984-07-02 1986-02-12 Koninklijke Philips Electronics N.V. Procédé pour commander un système de contrôle du trafic et système de contrôle du trafic pour l'usage du procédé

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5317311A (en) * 1988-11-14 1994-05-31 Martell David K Traffic congestion monitoring system
DE4135874C1 (en) * 1991-10-31 1992-09-17 Ant Nachrichtentechnik Gmbh, 7150 Backnang, De Traffic volume detection circuit - incorporates directional antenna with band-pass filter, frequency-voltage converter and pulse shaper
EP0612049A1 (fr) * 1993-02-15 1994-08-24 STN ATLAS Elektronik GmbH Procédé de classification de véhicules passant en un point prédéterminé de la route
TR28042A (tr) * 1993-02-15 1995-12-11 Atlas Elektronik Gmbh Onceden belirlenen bir yol noktasindan gecen tasitlarin siniflandirilmasina mahsus usul.
FR2714755A1 (fr) * 1994-01-04 1995-07-07 Le Parquier Guy Dispositif de captation et de recueil du flux de circulation automobile.
EP0896313A1 (fr) * 1998-04-08 1999-02-10 Graziano Gaggioli Equipement pour signaler la circulation de véhicules sur autoroutes, autostrades, rues à sens unique et similaires
EP1296302A1 (fr) * 2001-09-20 2003-03-26 Alma Mater Studiorum -Universita' di Bologna Système, unité centrale et procédé de surveillance du trafic
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
USRE47134E1 (en) 2011-05-11 2018-11-20 Leddartech Inc. Multiple-field-of-view scannerless optical rangefinder in high ambient background light
USRE48763E1 (en) 2011-05-11 2021-10-05 Leddartech Inc. Multiple-field-of-view scannerless optical rangefinder in high ambient background light
USRE48914E1 (en) 2012-03-02 2022-02-01 Leddartech Inc. System and method for multipurpose traffic detection and characterization
CN104504911A (zh) * 2013-12-25 2015-04-08 安徽宝龙环保科技有限公司 一种机动车测速装置及测速方法
US10488492B2 (en) 2014-09-09 2019-11-26 Leddarttech Inc. Discretization of detection zone

Also Published As

Publication number Publication date
EP0318260A3 (fr) 1990-07-04
GB8727824D0 (en) 1987-12-31

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