EP1040462A1 - Kollisionsvermeidungsystem für fahrzeuge bei schlechter sicht - Google Patents

Kollisionsvermeidungsystem für fahrzeuge bei schlechter sicht

Info

Publication number
EP1040462A1
EP1040462A1 EP99954339A EP99954339A EP1040462A1 EP 1040462 A1 EP1040462 A1 EP 1040462A1 EP 99954339 A EP99954339 A EP 99954339A EP 99954339 A EP99954339 A EP 99954339A EP 1040462 A1 EP1040462 A1 EP 1040462A1
Authority
EP
European Patent Office
Prior art keywords
vehicle
active
sensors
bis
obstacle
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
EP99954339A
Other languages
English (en)
French (fr)
Other versions
EP1040462B1 (de
Inventor
Carlo Corsi
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.)
Consorzio Creo - Centro Richerche Elettro Ottiche
Original Assignee
Consorzio Creo - Centro Richerche Elettro Ottiche
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 Consorzio Creo - Centro Richerche Elettro Ottiche filed Critical Consorzio Creo - Centro Richerche Elettro Ottiche
Publication of EP1040462A1 publication Critical patent/EP1040462A1/de
Application granted granted Critical
Publication of EP1040462B1 publication Critical patent/EP1040462B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/16—Anti-collision systems
    • G08G1/164—Centralised systems, e.g. external to vehicles

Definitions

  • the present invention concerns a system for preventing the collision of vehicles of any type in low visibility conditions.
  • the invention can be classified in the technical field of signalling for traffic monitoring systems and in the application field of road safety in low visibility conditions or in presence of dangerous obstacles.
  • the first group that provides assisted driving by means of systems on board, can be divided in two subgroups, one of which is based on active technologies and the other is based on passive technologies.
  • the subgroup based on passive technologies makes use of infrared vision, i.e., thermal viewers providing a better visibility in difficult conditions, such as not very thick fog, thanks to the better penetration of the infrared radiation compared to the one of visible spectrum.
  • thermal viewers providing a better visibility in difficult conditions, such as not very thick fog, thanks to the better penetration of the infrared radiation compared to the one of visible spectrum.
  • the subgroup based on active technologies includes essentially the electro- optical technologies, which are systems emitting short laser pulses in the infrared spectrum that act as an optical radar, in which the signal generated and back- scattered from the target is detected by a sensor that measures its shape and time of arrival, and then measures the speed and distance of the target.
  • electro- optical technologies are systems emitting short laser pulses in the infrared spectrum that act as an optical radar, in which the signal generated and back- scattered from the target is detected by a sensor that measures its shape and time of arrival, and then measures the speed and distance of the target.
  • These technologies are used in two ways: (a) active techniques with laser pulses in the near infrared, that do not allow long detection distances in case of very thick fog, and also suffer from jamming of the radar when the vehicle equipped with this apparatus crosses other vehicles equipped with the same alarm active system; (b) techniques based on the use of small radar systems installed on board the vehicle. These radar systems emit a pulse usually at a very high frequency
  • the invention described here is able to overcome the typical limitations of the techniques described above and consists essentially in a co-operative road- vehicle system for the detection of obstacles, that can be installed at a low cost and with a very high efficiency on the sides of a motorway.
  • This system includes a very simple passive infrared sensor with a few sensing elements (about one hundred), lower in size by three orders of magnitude than the thermo-cameras as to the number of pixels, that at present, thanks to the technology of microbolometers operating at room temperature, has an affordable cost and can therefore be suitable for every kind of vehicles, especially for cars.
  • This sensor does not provide an image (which might distract the driver attention); it provides an alarm indicating the presence of an obstacle on the road.
  • this sensor performs a differential measurement of the temperature on the road sides (which in case of a motorway are clearly distinguishable, thanks to the metallic guard-rails that obviously have a lower temperature compared to the temperature of any possible obstacle) and the thermal distribution on the road delimited by the borders.
  • the presence of a possible obstacle on the road is therefore detected by the thermal radiation emitted by a warmer object on the road.
  • This mechanism offers the advantage of a very high ability to discriminate the objects detected by the sensor.
  • the vehicles going ahead are easily distinguishable because of the high temperatures of their exhaust pipes.
  • the sensor therefore detects some signals which differ from the signals emitted by the other cold zones of the road.
  • the present system includes not only the sensor installed on the vehicle, but also small infrared emitters installed on the guard-rails, exactly in the same locations were now reflectors are placed. These emitters are essentially elements warmed up at a very low cost, directly powered by the electrical power line (for instance, AC 220V, 50 Hz). These emitters can be detected directly and synchronously by the sensor installed on board a vehicle. For this purpose, two little receivers, of the same type as the sensor above described, are installed on the vehicle, inside the headlights of the vehicle itself. These receivers, designed in an appropriate way, are the focalising antenna of the vehicle in the infrared spectrum.
  • the invention described here makes it possible to detect electromagnetic sources that are easily recognisable by the on board receivers and that have a signal intensity many times higher than the intensity of the background signal. This happens because such sources are detected in the infrared in a modulated way, even if the emission of the single emitters is relatively small (less than a few watts).
  • the present invention provides a system network operating along the whole road. For this purpose, receivers are also installed on each transmitting site, each receiver controlling several (for instance, three) corresponding transmitters placed on the other side of the road, and detecting if necessary the presence of each obstacle between every single receiver and the corresponding transmitter.
  • Fig. 1 shows two intelligent sensors 1 and 1' and telemeter 20 installed on a vehicle 10, of which only the frontal part is represented. This figure also shows the transmitters 2, 2', 2",...
  • Fig. 2 shows in particular the front part of vehicle 10 and the locations where the two intelligent sensors 1 and 1' and the telemeter 20 are installed.
  • Fig. 3 is a block diagram that shows the processing of two signals Ii and It', received respectively by sensor 1 and sensor 1', from the moment of their reception to the moment when an alarm signal is emitted in the event of obstacles present on the road.
  • Fig. 4 is a block diagram that shows the processing of the infrared signals emitted by the transmitters 2, 2', 2",...; 2 D j s , 2'bi S , 2"b ls installed on the two roadside guard- rails and of the infrared signals emitted naturally by any other object which may be present in the ambient.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Emergency Alarm Devices (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Air Bags (AREA)
  • Radar Systems Or Details Thereof (AREA)
EP99954339A 1998-10-15 1999-10-14 Kollisionsvermeidungsystem für fahrzeuge bei schlechter sicht Expired - Lifetime EP1040462B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITRM980648 1998-10-15
IT1998RM000648A IT1302376B1 (it) 1998-10-15 1998-10-15 Sistema per evitare la collisione di veicoli in condizioni di scarsavisibilita'
PCT/IT1999/000327 WO2000022596A1 (en) 1998-10-15 1999-10-14 System for avoiding collision of vehicles in low visibility conditions

Publications (2)

Publication Number Publication Date
EP1040462A1 true EP1040462A1 (de) 2000-10-04
EP1040462B1 EP1040462B1 (de) 2006-07-19

Family

ID=11406168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99954339A Expired - Lifetime EP1040462B1 (de) 1998-10-15 1999-10-14 Kollisionsvermeidungsystem für fahrzeuge bei schlechter sicht

Country Status (6)

Country Link
EP (1) EP1040462B1 (de)
AT (1) ATE333691T1 (de)
DE (1) DE69932404T2 (de)
ES (1) ES2270621T3 (de)
IT (1) IT1302376B1 (de)
WO (1) WO2000022596A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2427058A (en) * 2005-06-07 2006-12-13 Alberto Rossi System for detecting objects in a roadway and providing a warning to drivers.
ITRM20090589A1 (it) * 2009-11-12 2011-05-12 Alessandro Baselice Disposizione per la sicurezza del traffico stradale ed autostradale
EP2998947A1 (de) 2014-09-16 2016-03-23 Johnny Vaccaro Dynamische Form Anzeige
CN120526586B (zh) * 2025-05-22 2026-02-10 重交智安(浙江)科技发展有限公司 一种基于传感光缆护栏的车辆监测报警处理方法与系统

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2492748A2 (fr) * 1979-11-07 1982-04-30 Massoni Francois Dispositif de commande automatique de l'allumage et de l'extinction des feux d'un vehicule
FR2598839A1 (fr) * 1986-05-14 1987-11-20 Mirica Gheorghe Systeme actif de signalisation concernant la route et les vehicules, qui permet d'anticiper et d'eviter les evenements routiers
US4872051A (en) * 1987-10-01 1989-10-03 Environmental Research Institute Of Michigan Collision avoidance alarm system
US5128874A (en) * 1990-01-02 1992-07-07 Honeywell Inc. Inertial navigation sensor integrated obstacle detection system
US5134393A (en) * 1990-04-02 1992-07-28 Henson H Keith Traffic control system
IT1297198B1 (it) * 1992-07-06 1999-08-03 Valerio Brunetti Sistema di rilevamento e segnalazione automatica preventiva di ostacoli in autostrada, in presenza di nebbia.
EP0590588B2 (de) * 1992-09-30 2003-09-10 Hitachi, Ltd. Informationssystem für den Fahrer eines Fahrzeuges

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0022596A1 *

Also Published As

Publication number Publication date
EP1040462B1 (de) 2006-07-19
DE69932404D1 (de) 2006-08-31
ATE333691T1 (de) 2006-08-15
IT1302376B1 (it) 2000-09-05
ITRM980648A1 (it) 2000-04-15
DE69932404T2 (de) 2007-03-29
ES2270621T3 (es) 2007-04-01
WO2000022596A1 (en) 2000-04-20

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