EP1778921A1 - Plot routier - Google Patents

Plot routier

Info

Publication number
EP1778921A1
EP1778921A1 EP05702744A EP05702744A EP1778921A1 EP 1778921 A1 EP1778921 A1 EP 1778921A1 EP 05702744 A EP05702744 A EP 05702744A EP 05702744 A EP05702744 A EP 05702744A EP 1778921 A1 EP1778921 A1 EP 1778921A1
Authority
EP
European Patent Office
Prior art keywords
light emitting
emitting device
photodetector
road sign
road
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Withdrawn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
EP05702744A
Other languages
German (de)
English (en)
Inventor
Stuart John Hume
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1778921A1 publication Critical patent/EP1778921A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
    • E01F9/553—Low discrete bodies, e.g. marking blocks, studs or flexible vehicle-striking members
    • E01F9/559—Low discrete bodies, e.g. marking blocks, studs or flexible vehicle-striking members illuminated

Definitions

  • This invention relates to road signs such as road markers and more
  • Retro-reflective road studs are well known in the art. These studs are
  • first vehicle traveling in a first direction is reflected in an opposite or
  • the head lights of the first vehicle from an opposite direction, the head lights of the first vehicle from an opposite direction
  • the head lights of the approaching vehicle tend to at least
  • a road sign comprising: a body; - a photodetector on the body; the photodetector being configured on the body to be sensitive to illumination by headlights of a first vehicle approaching the body in a first direction; the photodetector being connected in a circuit on the body also comprising a light emitting device;
  • the circuit being configured to energize the light emitting device in response to illumination of the photodetector by the head lights of the first vehicle; and the light emitting device being mounted on the body to enhance visibility of the body.
  • the light emitting device preferably emits light in a direction wherein visibility of the body is enhanced for a driver of a second vehicle being driven in a direction other than the first direction.
  • the body may be the body of a vehicle carrying the sign.
  • the sign may be in the form of a road side marker.
  • the sign may be in the form of a road surface mountable stud and wherein the body is configured to be mounted on a road surface.
  • the photodetector may be a photoswitch connecting the light emitting device to a power supply.
  • the power supply may be externally of the body and in other embodiments at least part of the power supply may be mounted on the body of the sign.
  • the power supply may comprise a photosensitive power source and a charge storage device.
  • the photodetector is connected to the light emitting device to act as power supply and to power the light emitting device upon illumination of the photodetector.
  • a photoswitch may be connected in the circuit with the photodetector and the light emitting device.
  • the photodetector may be mounted on one sidewall of the body and the light emitting device may be mounted on another sidewall of the body, such as an opposite sidewall.
  • a retro-reflector may be mounted on at least one of said one sidewall and said other sidewall of the body.
  • Also included within the scope of the present invention is a method of signaling to traffic on a road, the method comprising the steps of: providing a road sign comprising a body carrying a photodetector and an electrical circuit connecting the photodetector to a light emitting device on the body; utilizing impinging light emitted by headlights of a first vehicle traveling in a first direction to cause the photodetector to cause energization of the light emitting device; and - causing the light emitting device to emit light to enhance visibility of the body.
  • the method may comprise the further steps of causing a light reflector on the body to reflect the impinging light in an opposite direction towards the first vehicle and causing the light emitting device to emit light in a direction wherein visibility of the body is enhanced for a driver of another vehicle which is being driven in a direction other then the first direction.
  • figure 1 is a diagrammatic representation of a road section, two
  • figure 2 is a diagrammatic perspective view of one embodiment of a
  • road marker according to the invention in the form of a road surface mountable road stud according to the invention
  • figure 3 is a very basic block diagram of part of an electric circuit
  • figure 4 is a similar diagram showing other detail of the stud in figure
  • figure 5 is a basic block diagram of a second embodiment of the stud
  • figure 6 is a block diagram of an external power supply connected to a plurality of road studs according to the invention.
  • figure 7 is a diagrammatic representation of another road stud.
  • figure 8 is a diagrammatic representation of a further road sign according to the invention.
  • FIG 1 there is shown a conventional road 1 0 having a center line
  • a first vehicle 1 6 travels in a first direction A and
  • a second vehicle 1 8 travels in an opposite direction B.
  • the known road stud comprises a body mountable on the road surface
  • the reflector in use reflects back in
  • a body 22 which may have a conventional shape and
  • the body comprises a base that is mountable on a road
  • the body further comprises
  • the body 22 On at least one of the sidewalls 28, the body 22 carries a
  • the body furthermore, propagating in direction A in an opposite direction B.
  • the body furthermore, propagating in direction A in an opposite direction B.
  • the photoswitch 26 is electrically connected in a circuit 32 (shown in figure 3) to a light emitting device 30 and charge storage device 34.
  • light emitting device 30 may be a light emitting diode (LED), is mounted on opposite sidewall 31 of the stud and emits light in direction A, that is in a direction opposite to the direction B wherein the reflector 24 reflects the impinging light.
  • LED light emitting diode
  • the circuit 32 is closed, so that the LED is energized.
  • the LED emits light in direction A, so that the body 22 of stud 20 is better visible to the driver of an approaching second vehicle 1 8, being driven in another direction, such as opposite direction B.
  • the charge storage device 34 may be in the form of a capacitor or rechargeable battery 34 and is connected via a suitable charger circuit 36 to be charged by
  • the photoswitch 26 is configured to close the circuit 32 upon illumination thereof by light emitted by the headlights of approaching traffic.
  • photoswitch may be provided on sidewall 31 to cause energization of a second LED provided on sidewall 28.
  • a single photoswitch may be provided in a suitable position on the body 22 to cause energization of both the LED's simultaneously.
  • reflector may also be provided on sidewall 31 .
  • the stud body 42 carries a photodetector arrangement 26 which is connected via optional day/night switch 38 to the light emitting device 30. During the day, the switch is normally open. In this embodiment, the LED 30 is energized by current generated at the arrangement 26, as a result of illumination of arrangement 26 by the head lights of an approaching vehicle. Hence, in this embodiment the arrangement 26 acts as power supply or voltage source or current source and not as a mere switch as in the previous embodiment.
  • a charge storage device 34 may be provided over the arrangement 26 as shown in figure 5.
  • a conventional retro- reflector is shown at 24.
  • a plurality of studs 50.1 to 50. n are provided on a road surface 52 on a line 54.
  • Each stud comprises a respective body 56 carrying a respective light emitting device 58.1 to 58. n.
  • the devices may emit light in predominantly a selected direction as hereinbefore described, or omni-directionally.
  • Electrical power for energizing the devices is derived from an external power source 60.
  • the external power source may be mounted on the road side and may comprise a solar panel 62 or any other suitable means for generating electricity.
  • the source may comprise a local storage device such as a rechargeable battery 64.
  • the source is connected by a circuit 68 to the devices 58.1 to 58. n, to power and drive same.
  • Photoswitches similar to switch 26 in figures 2 and 3 may be provided on the stud bodies in series with the respective LED's 58.1 to 58. n, to ensure that the LED is energized only when the photoswitch is illuminated by the head lights of approaching traffic.
  • the stud 70 comprises a body 72 and the body is configured to receive at face 74 thereof light impinging in direction A and to transmit and/or reflect the light through the body and beyond face 76 thereof in direction A.
  • the body may be transparent or translucent.
  • the body may comprise a mirror arrangement for receiving and reflecting the impinging light in direction A.
  • the body may further comprise fluorescent and/or phosphorescent means.
  • a sign 80 according to the invention may be provided on a carrier vehicle as shown at 80 in figure 8.
  • the sign is shown where it is mounted on a rear end of the carrier vehicle 82.
  • at least part of the sign for example the light emitting devices thereof, may be mounted on other parts of the carrier vehicle, such as on the sides 85 thereof.
  • the sign 80 comprises at least one photodetector 84 connected by an electrical circuit (not shown) to at least one light emitting devices 86.
  • the detector 84 causes the light emitting devices to be energized, to emit visible signals towards a driver of the following vehicle and/or even a third vehicle.
  • the light emitting devices are mounted on the sides of the carrier vehicle, they may, when energized, make the carrier vehicle better visible to the driver of another vehicle, including the driver of a third vehicle being driven in another direction.
  • a similar arrangement may be used on road side markers or furniture to demarcate a hazardous area or section on a road.
  • the light emitting devices in all of the aforementioned embodiments may emit light in the red or orange or green parts of the visible spectrum. In other embodiments broad spectrum white light may be emitted.
  • the aforementioned electrical circuits may comprise means for pulsing energization of the light emitting devices intermittently, including periodically.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Signs Or Road Markings (AREA)

Abstract

Cette invention concerne une unité de signalisation routière (20) comprenant un corps (22). Un photodétecteur (26) monté sur le corps réagit sous l'effet d'un éclairage par des phares d'un premier véhicule s'approchant du corps. Le photodétecteur est connecté dans un circuit (32) sur le corps comprenant également un dispositif électroluminescent (30). Le circuit est conçu pour alimenter le dispositif électroluminescent aussitôt que le photodétecteur est éclairé par les phares d'un véhicule s'approchant du corps dans une première direction A, le dispositif électroluminescent étant monté sur le corps pour accroître la visibilité du corps, en particulier pour un conducteur d'un second véhicule se déplaçant dans une direction B différente de la première direction.
EP05702744A 2004-07-23 2005-01-21 Plot routier Withdrawn EP1778921A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200405887 2004-07-23
PCT/IB2005/050250 WO2006011064A1 (fr) 2004-07-23 2005-01-21 Plot routier

Publications (1)

Publication Number Publication Date
EP1778921A1 true EP1778921A1 (fr) 2007-05-02

Family

ID=34959992

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05702744A Withdrawn EP1778921A1 (fr) 2004-07-23 2005-01-21 Plot routier

Country Status (3)

Country Link
US (1) US20080030978A1 (fr)
EP (1) EP1778921A1 (fr)
WO (1) WO2006011064A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2491302B (en) * 2010-03-09 2013-04-10 Clearview Traffic Group Ltd Improved road studs
GB2478560B (en) * 2010-03-09 2012-10-31 Clearview Traffic Group Ltd Improved road studs
DE102015010011B4 (de) * 2015-08-05 2020-03-19 Wirtgen Gmbh Selbstfahrende Baumaschine und Verfahren zur Anzeige der Umgebung einer selbstfahrenden Baumaschine
KR101899492B1 (ko) * 2016-07-20 2018-09-19 주식회사 에이치비인더스트리 도로 표지병의 제어 장치
US10155475B1 (en) * 2017-12-04 2018-12-18 Easton Scientific, Inc. Autonomous vehicle dual traffic reflector detector
US10539964B2 (en) * 2017-12-04 2020-01-21 Easton Scientific, Inc. Autonomous vehicle dual traffic reflector detector with wireless transmissions
US10156636B1 (en) * 2017-12-18 2018-12-18 Easton Scientific, Inc Autonomous vehicle dual traffic reflector detector with information transmittal
EP4124691A1 (fr) 2021-07-30 2023-02-01 Pavnext - Technological Pavements, LDA Dispositif de signalisation routière et son procédé de fonctionnement
KR102564742B1 (ko) 2021-10-21 2023-08-07 이승호 도로 표지병
KR102565357B1 (ko) 2021-10-28 2023-08-09 주식회사 루멘에어텍 도로 표지병

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
US4249160A (en) * 1975-11-21 1981-02-03 Chilvers Graham R Vehicle mounted light activated control system
US4290047A (en) * 1976-03-23 1981-09-15 Latta Jr John S Light detection, signaling and speed measurement system
US4117457A (en) * 1976-03-23 1978-09-26 Latta John S Light detection and signaling system
JPH0540092Y2 (fr) * 1988-04-11 1993-10-12
JPH0540093Y2 (fr) * 1988-05-30 1993-10-12
US5005004A (en) * 1988-10-21 1991-04-02 Udofot Michael P Light activated vehicle sensor with flashing light and pulsing sound alarm
UA41260C2 (fr) * 1992-07-08 2001-09-17 Astucia Lda
US5782552A (en) * 1995-07-26 1998-07-21 Green; David R. Light assembly
US5664874A (en) * 1995-12-29 1997-09-09 Winterer; Allen G. Barricade warning light
US5984570A (en) * 1998-03-13 1999-11-16 Parashar; Amish Self energized automatic surface marker
WO2000048166A1 (fr) * 1999-02-11 2000-08-17 David Hubbell Panneau de signalisation lumineux a energie solaire active par un vehicule
AU1341901A (en) * 1999-10-25 2001-05-08 Avery Dennison Corporation Roadmarker with led and beam shaping optics
GB0026677D0 (en) * 2000-11-01 2000-12-13 Astucia Uk Ltd Signalling means
US20040175232A1 (en) * 2003-03-07 2004-09-09 Hunter Charles Eric Emissive highway markers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006011064A1 *

Also Published As

Publication number Publication date
WO2006011064A1 (fr) 2006-02-02
US20080030978A1 (en) 2008-02-07

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