EP0318260A2 - Überwachungsmittel - Google Patents

Überwachungsmittel Download PDF

Info

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Withdrawn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
English (en)
French (fr)
Other versions
EP0318260A3 (de
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/de
Publication of EP0318260A3 publication Critical patent/EP0318260A3/de
Withdrawn legal-status Critical Current

Links

Images

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.

Landscapes

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EP88311069A 1987-11-27 1988-11-23 Überwachungsmittel Withdrawn EP0318260A3 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=10627640

Family Applications (1)

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EP88311069A Withdrawn EP0318260A3 (de) 1987-11-27 1988-11-23 Überwachungsmittel

Country Status (2)

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

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 (de) * 1993-02-15 1994-08-24 STN ATLAS Elektronik GmbH Verfahren zum Klassifizieren von einen vorgegebenen Wegpunkt passierenden Fahrzeugen
FR2714755A1 (fr) * 1994-01-04 1995-07-07 Le Parquier Guy Dispositif de captation et de recueil du flux de circulation automobile.
EP0896313A1 (de) * 1998-04-08 1999-02-10 Graziano Gaggioli Einrichtung zum Signalisieren von Fahrzeugverkehr auf Autobahnen, Schnellstrassen, Einbahnstrassen und dergleichen
EP1296302A1 (de) * 2001-09-20 2003-03-26 Alma Mater Studiorum -Universita' di Bologna System, Zentrale und Verfahren zur Verkehrsüberwachung
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
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
WO2008154737A1 (en) 2007-06-18 2008-12-24 Leddartech Inc. Lighting system with traffic management capabilities
US8600656B2 (en) 2007-06-18 2013-12-03 Leddartech Inc. Lighting system with driver assistance capabilities
WO2009079779A1 (en) 2007-12-21 2009-07-02 Leddartech Inc. Parking management system and method using lighting system
EP2517189B1 (de) 2009-12-22 2014-03-19 Leddartech Inc. Aktives 3d-überwachungssystem für verkehrsdetektion
WO2012172526A1 (en) 2011-06-17 2012-12-20 Leddartech Inc. System and method for traffic side detection and characterization

Family Cites Families (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
GB2154388B (en) * 1984-02-14 1987-11-25 Secr Defence Image processing system
NL8402094A (nl) * 1984-07-02 1986-02-03 Philips Nv Werkwijze voor het besturen van een verkeersregelsysteem en het verkeersregelsysteem voor het toepassen van de werkwijze.

Cited By (15)

* 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 (de) * 1993-02-15 1994-08-24 STN ATLAS Elektronik GmbH Verfahren zum Klassifizieren von einen vorgegebenen Wegpunkt passierenden Fahrzeugen
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 (de) * 1998-04-08 1999-02-10 Graziano Gaggioli Einrichtung zum Signalisieren von Fahrzeugverkehr auf Autobahnen, Schnellstrassen, Einbahnstrassen und dergleichen
EP1296302A1 (de) * 2001-09-20 2003-03-26 Alma Mater Studiorum -Universita' di Bologna System, Zentrale und Verfahren zur Verkehrsüberwachung
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
USRE50261E1 (en) 2012-03-02 2025-01-07 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 (de) 1990-07-04
GB8727824D0 (en) 1987-12-31

Similar Documents

Publication Publication Date Title
EP0318260A2 (de) Überwachungsmittel
US6340139B1 (en) Highway grade crossing vehicle violation detector
US5771484A (en) Automated positive control traffic system for weather
US6384740B1 (en) Traffic speed surveillance and control system
US5652705A (en) Highway traffic accident avoidance system
US5570087A (en) Motor vehicle performance monitor and method
KR101752858B1 (ko) 레이더 기반 고 정밀 돌발상황 검지 시스템
RU2598362C1 (ru) Система предупреждения столкновений участников дорожного движения
KR20160142182A (ko) Its 현장장비 통합 제어 장치 및 이를 포함하는 its 현장장비 통합 제어 시스템
CA2134717A1 (en) Traffic monitoring system with safe speed computations
US4727371A (en) Traffic control system and devices for alleviating traffic flow problems at roadway junction
EP0825578B1 (de) System zur Überwachung von Verkehrsflussänderungen
US20060111819A1 (en) System and method for monitoring the external environment of a motor vehicle
RU2540816C1 (ru) Система обеспечения безопасности движения транспортных средств и пешеходов на дорогах
US6285943B1 (en) Road speed control system
US20060180712A1 (en) Advance warning system for railroad crossing
KR20010044851A (ko) 복합 교통단속 장치와 제어 방법
US3258744A (en) Vehicle traffic control system
KR102646041B1 (ko) 교통사고 방지 효과를 높인 삼거리 차량 진입 안내 시스템
GB2269694A (en) Automatic survey and warning system of obstacles on motorways during the presence of fog
JPH07237521A (ja) 車両用サイドエアバッグ制御装置
Ferlis Infrastructure collision-avoidance concept for straight-crossing-path crashes at signalized intersections
EP1040462B1 (de) Kollisionsvermeidungsystem für fahrzeuge bei schlechter sicht
DE29610241U1 (de) Falschfahrer-Warnanlage
JPH0245264A (ja) 走行路内状況監視装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19910105