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EP2488401B2 - Dispositif lumineux de signalisation du type à dels et méthode de commande associée - Google Patents
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EP2488401B2 - Dispositif lumineux de signalisation du type à dels et méthode de commande associée - Google Patents

Dispositif lumineux de signalisation du type à dels et méthode de commande associée Download PDF

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Publication number
EP2488401B2
EP2488401B2 EP10798582.2A EP10798582A EP2488401B2 EP 2488401 B2 EP2488401 B2 EP 2488401B2 EP 10798582 A EP10798582 A EP 10798582A EP 2488401 B2 EP2488401 B2 EP 2488401B2
Authority
EP
European Patent Office
Prior art keywords
led
luminous
type
light
signaling
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.)
Active
Application number
EP10798582.2A
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German (de)
English (en)
Other versions
EP2488401A1 (fr
EP2488401B1 (fr
Inventor
Edoardo Ecoretti
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.)
Solari SpA
Original Assignee
Solari SpA
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Filing date
Publication date
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Application filed by Solari SpA filed Critical Solari SpA
Publication of EP2488401A1 publication Critical patent/EP2488401A1/fr
Application granted granted Critical
Publication of EP2488401B1 publication Critical patent/EP2488401B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
    • B61L5/12—Visible signals
    • B61L5/18—Light signals; Mechanisms associated therewith, e.g. blinders
    • B61L5/1809—Daylight signals
    • B61L5/1881—Wiring diagrams for power supply, control or testing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
    • B61L5/12—Visible signals
    • B61L5/18—Light signals; Mechanisms associated therewith, e.g. blinders
    • B61L5/1809—Daylight signals
    • B61L5/1845—Optical systems, lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L2207/00—Features of light signals
    • B61L2207/02—Features of light signals using light-emitting diodes [LEDs]

Definitions

  • the present invention concerns a LED-type luminous signaling device used, for example but not only, in traffic-light apparatuses.
  • the luminous signaling device according to the present invention is preferentially used in traffic-light apparatuses to regulate rail or road traffic, whether driven manually or automatically.
  • the luminous signaling device according to the present invention can also be applied to other types of signaling apparatuses, such as signaling buoys, signaling devices for electric pylons or cables, or public lighting devices.
  • the device according to the invention is applied in cases where it is desired to guarantee a great safety in the correct functioning of luminous signaling systems, in order to prevent accidents or dangerous situations for persons or things.
  • EP-A-1.215.641 discloses a LED-type luminous signaling device comprising LED-type luminous emission sources with optical feedback.
  • WO2006099732A1 discloses the features of the preamble of main claim 1.
  • LED-type luminous elements both because the light emitted is more direct and coherent, and also because they last longer and have lower electric consumption, given the same light emitted, compared with traditional lamps.
  • Another advantage of LED-type luminous elements is that given by their nature as multi-point emitter, so that they can continue to carry out their function even when there is a breakage and/or malfunction in some of the elements.
  • LED technology Since it is more complex than the filament of a bulb, LED technology has a lot of cases of breakdowns, for example an open LED, a shortcircuited LED, low light emission, or others.
  • LED technology since it is multi-source, allows to keep the device in an operating state even in the event of one or more elementary LED sources not functioning. Indeed there are different techniques to guarantee full functioning even in poor conditions, such as for example the use of current shunt to the heads of broken LEDs, increasing the pilot current on LEDs that are still whole, or others. However, in this case too, as we said before, it is difficult to detect reliable diagnostic data based on the detection of the functioning electric quantities of the LEDs.
  • Purpose of the present invention is to achieve a LED-type luminous signaling device used preferably, but not only, in traffic-light apparatuses, which makes the functioning diagnostics reliable, detecting and signaling possible malfunctions, even partial, such as breakages or considerable reductions in the luminous radiation emitted.
  • the Applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.
  • the LED-type luminous emission source or sources emit luminous radiation on the same wavelength.
  • the LED-type luminous emission sources are divided into two or more groups, uniformly distributed on a single support, each group being able to be alternately activated and suitable to emit luminous radiation at a determinate wavelength.
  • each group of LED-type luminous emission sources it is possible to emit a luminous radiation of the desired color, for example red, amber or green, or to provide that all the LED-type luminous emission sources are the same color, thus being able to activate the groups alternately, allowing to increase the operating duration of the device.
  • the signaling device comprises control and processing means, connected to the optical detection means, to acquire the detection data and to calculate the quantity of luminous radiation emitted over all.
  • the device comprises an electric load, or fictitious load, able to be selectively activated according to the detection of the quantity of light emitted over all and detected by the optical detection means.
  • an electric load or fictitious load, able to be selectively activated according to the detection of the quantity of light emitted over all and detected by the optical detection means.
  • the one or more light-directing lenses comprise darkening portions, suitable to absorb incident light from outside the signaling device. In this way it is possible to prevent detection errors by the detectors, produced for example by a high level of incident ambient light on the light-directing lens or lenses.
  • a LED-type luminous signaling device 10 is advantageously used in a traffic-light apparatus, not shown in the drawings, used for example to regulate rail traffic.
  • the device 10 comprises a support 12, provided with a plurality of light-directing lenses 14 made in a single piece with the support 12.
  • the support 12 is made by molding in plastic or polymer material, for example polycarbonate.
  • the support 12 is stably coupled with an electronic card 13, or PCB (Printed Circuit Board), on which a plurality of LED-type luminous sources 16 are mounted, each associated with a corresponding light-directing lens 14, and a plurality of photo-detectors 17.
  • PCB Print Circuit Board
  • the support 12 and the electronic card 13 are similar in shape, in this case substantially circular, able to allow them to be stably inserted in a containing structure of the traffic-light apparatus.
  • the LED-type luminous sources 16 are mounted on the electronic card 13, in a predetermined disposition consistent with the disposition of the light-directing lenses 14 on the support 12, so as to define an effective area of light emission, substantially concentrated in correspondence with the light-directing lenses 14.
  • the light-directing lenses 14 comprise a collimation portion 22 ( fig. 3 ), disposed below the lens 14 and suitable to collimate in a single direction, or signaling direction, the luminous radiations emitted by an associated LED-type luminous source 16 in different directions.
  • the signaling direction is perpendicular to the plane identified both by the electronic card 13 and also by the upper surface of the support 12.
  • the light-directing lens 14 also comprises an exit portion 24, substantially flat, circular in shape, made on an upper face of the support 12. From the exit portion 24 the luminous radiations of the LED-type luminous sources 16 are emitted toward the outside in the signaling direction.
  • the light-directing lenses 14 are grouped together in modules 15 of three ( fig. 2 ), in a regular disposition, in which the center of each light-directing lens 14 of the same module 15 is positioned in correspondence with the tops of an equilateral triangle and the corresponding exit portions 24 are reciprocally tangent in pairs. This modular disposition is repeated continuously and regularly over the whole support 12.
  • Each light-directing lens 14 of the same module 15 is associated with an underlying LED-type luminous source 16 of a different color.
  • the corresponding triad of LED-type luminous sources 16 is able to be activated alternately, so as to switch them on one at a time, and thus to emit from the device 10 a luminous radiation of the desired color.
  • the LED-type sources 16 can be the same type, that is, they can emit luminous radiation on the same wavelength, corresponding to a single color, in this case achieving a signaling device having a single signaling function, and in which all the LED-type sources 16 are activated simultaneously, or alternatively one LED-type source 16 at a time, so as to prolong the duration of operative functioning of the device 10.
  • the interception portion 18 has a circular shape, common to the three light-directing lens 14 of the same module 15.
  • the interception portion 18 comprises an interception prism 19 ( figs. 2 and 3 ) of the total reflection type, having an inclination of about 45 degrees with respect to the flat upper surfaces of the exit portion 24 and the interception portion 18, and a circular surface development.
  • the interception prism 19 is suitable to intercept the predefined fraction of light emitted by the LED-type sources 16 associated with the module 15 and to reflect it in a direction substantially parallel to the flat surfaces of the interception portion 18 and the exit portion 24, that is, perpendicular to the signaling direction.
  • the length of the interception prism 19, and hence the thickness of the interception portion 18 with respect to the exit portion 24, is made both as a function of the wavelength of the luminous radiations emitted, and also as a function of the predefined fraction of luminous radiation to be intercepted.
  • the predefined fraction of luminous radiation to be intercepted is around one per cent.
  • the interception portion 18 also comprises a reflection prism 20, again of the total reflection type, disposed in a central position with respect to the interception portion 18.
  • the reflection prism 20 is suitable to reflect the fraction of luminous radiation intercepted by the interception portion 19 toward an area of the electronic card 13, central with respect to the three light-directing lenses 14, in correspondence with which area the associated photo-detector 17 is mounted.
  • the reflection prism 20 is substantially shaped conical, with the lateral surface inclined by about 45 degrees with respect to the upper flat surface of the interception portion 18.
  • the signaling device 10 also comprises a processing and control unit 30, directly connected both to the photo-detectors 17 and also to the LED-type sources 16.
  • the processing and control unit 30 is suitable to switch on the LED-type sources 16, based on a command received for example from remote, and also to acquire the data relating to the fraction of luminous radiation detected by the photo-detectors 17 and then to calculate the total luminous radiation emitted by the device 10.
  • the processing and control unit 30 can be a microprocessor of a known type, typically used in electronic devices.
  • the device 10 comprises a fictitious electric load 32, connected to the control unit 30, able to be selectively driven by it according to the detection of total luminous radiation emitted by the device 10 and calculated by means of the detection of the corresponding fraction intercepted by the photo-detectors 17.
  • the load 32 is switched on or off according to the real functioning state of the device 10, which allows to signal any functioning anomaly, for example detected remotely, as if the signaling device were actually provided with a traditional type lamp.
  • modules 15 of the device 10 are not provided with the interception portion 18, inasmuch as the light they emit is not sent in the signaling direction but is intercepted outside the device 10 by a front shield of the traffic-light apparatus, not shown. This light is diverted toward the bottom of the traffic-light apparatus so as to allow the operators responsible for maintenance to inspect the actual functioning state visually.
  • At least part of the support 12 comprises darkening portions 26, in which the plastic material is made opaque in correspondence with the spaces between the modules 15. This is to absorb the external light incident on the signaling device 10 and therefore to prevent external ambient luminous radiation being detected by the photo-detectors 17, which is not wanted.
  • the LED-type signaling device 10 as described heretofore functions as follows.
  • the signaling device 10 When the signaling device 10 is switched on, that is, when a first group of LED-type luminous sources 16 corresponding to the desired color is activated, a plurality of rays R' emitted by each LED-type source 16 in different directions is collimated by the collimation portion 22 into corresponding rays R" in the signaling direction.
  • the rays R" are sent, inside the light-directing lens 14, toward the exit portion 24, striking it perpendicularly and coming out as rays emitted Re in the signaling direction.
  • the rays Rc" are propagated along the surface of the interception portion, substantially radially toward the center of the module 15 as far as the interception prism 20, in correspondence with which they are further reflected, totally, into corresponding control rays Rc"' toward the corresponding photo-detector 17 disposed on the electronic card 13.
  • the processing and control unit 30 acquires in a known manner the luminous radiation detected by each photo-detector 17, calculating the luminous radiation emitted overall by the device 10, according to the known and predefined percentage of the interception fractions of the interception prisms 19.
  • the detection of the luminous radiation captured by the photo-detectors 17 does not refer to an absolute emission value, but to a relative value corresponding to a stream of light specifically defined for each optical group.
  • the calibration of the threshold level below which the malfunction is signaled allows to keep in consideration all the constructional variables of the signaling device 10, both mechanical and electrical, which can influence the stream of light actually emitted.
  • the device 10 activates an anomaly or breakdown signal, such as for example switching off the fictitious load 32, therefore allowing the remote detection of the functioning anomaly by a traffic control center.
  • the signal can be done in a different way, for example by sending a message through a suitable communication network, by a wave conveyed on the electric feed line of the traffic-light apparatus.
  • each module 15 is associated with a pair of photo-detectors 17, independent of each other, so as to guarantee a greater functioning reliability and detection efficiency.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Selective Calling Equipment (AREA)

Claims (7)

  1. Dispositif de signalisation lumineuse de type DEL comprenant des sources d'émission lumineuse de type DEL (16) et trois lentilles dirigeant la lumière (14), capables de diffuser le rayonnement lumineux émis par des sources d'émission lumineuse de type DEL (16) correspondantes dans au moins une direction de signalisation,
    les trois lentilles dirigeant la lumière (14)
    - se trouvant placées selon une disposition régulière, dans laquelle les centres respectifs des lentilles dirigeant la lumière (14) sont positionnés aux sommets d'un triangle équilatéral,
    - comprenant des portions de sortie (24) correspondantes d'où les rayonnements lumineux des sources lumineuses de type DEL (16) sont émis vers l'extérieur dans la direction de signalisation, et
    - étant configurées de manière à définir au moins une portion d'interception (18) en mesure de dévier une fraction prédéfinie de la totalité du rayonnement lumineux émis par chaque source d'émission lumineuse de type DEL (16) dans une ou plusieurs directions de commande différentes de la fonction de signalisation ;
    le dispositif de signalisation comprenant par ailleurs
    un support (12) doté de lentilles dirigeant la lumière (14) réalisées d'un seul tenant avec le support (12),
    une portion de collimation (22), dont chacune est disposée respectivement au-dessous d'une lentille dirigeant la lumière (14) et en mesure de collimater, dans la direction de signalisation, les rayonnements lumineux émis par une source lumineuse associée de type DEL (16), et
    un moyen de détection optique (17) disposé de manière cohérente par rapport à la direction de commande afin de détecter la fraction prédéfinie du rayonnement lumineux dévié par la portion d'interception (18),
    caractérisé en ce que
    les portions de sortie (24) sont essentiellement planes, de forme circulaire, réalisées sur une face supérieure du support (12) et sont réciproquement tangentes deux à deux.
  2. Dispositif selon la revendication 1, caractérisé en ce que la ou les source(s) d'émission de type DEL (16) émettent un rayonnement lumineux sur la même longueur d'onde.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que les sources d'émission lumineuse de type DEL (16) sont divisées en deux groupes ou plus répartis uniformément sur le support (12), chaque groupe pouvant être activé alternativement et étant en mesure d'émettre un rayonnement lumineux sur une longueur d'onde prédéterminée.
  4. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend des portions d'assombrissement (26) capables d'absorber tout rayonnement lumineux incident en provenance de l'extérieur du dispositif.
  5. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend un moyen de commande et de traitement (30), raccordé au moyen de détection optique (17) et capable d'acquérir les données en provenance du moyen de détection optique (17), afin de calculer le rayonnement lumineux global émis.
  6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend une charge électrique (32) pouvant être activée de manière sélective en fonction de la détection du rayonnement lumineux global émis et détecté par le moyen de détection optique (17).
  7. Appareil de feux de signalisation utilisé sur les voies ferrées ou les routes, comprenant un dispositif de signalisation de type DEL (10) tel que dans l'une quelconque des revendications 1 à 6.
EP10798582.2A 2009-10-16 2010-10-15 Dispositif lumineux de signalisation du type à dels et méthode de commande associée Active EP2488401B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUD2009A000184A IT1396088B1 (it) 2009-10-16 2009-10-16 Dispositivo di segnalazione luminosa a led e relativo procedimento di controllo
PCT/IB2010/002625 WO2011045663A1 (fr) 2009-10-16 2010-10-15 Dispositif lumineux de signalisation du type à dels et méthode de commande associée

Publications (3)

Publication Number Publication Date
EP2488401A1 EP2488401A1 (fr) 2012-08-22
EP2488401B1 EP2488401B1 (fr) 2013-08-07
EP2488401B2 true EP2488401B2 (fr) 2017-07-12

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ID=42697428

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Application Number Title Priority Date Filing Date
EP10798582.2A Active EP2488401B2 (fr) 2009-10-16 2010-10-15 Dispositif lumineux de signalisation du type à dels et méthode de commande associée

Country Status (3)

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EP (1) EP2488401B2 (fr)
IT (1) IT1396088B1 (fr)
WO (1) WO2011045663A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011084590A1 (de) * 2011-10-17 2013-04-18 Zumtobel Lighting Gmbh Leuchte
US8960969B2 (en) 2012-09-28 2015-02-24 Lsi Corporation Semiconductor structure with waveguide
CA3029180C (fr) 2016-06-27 2021-02-02 Siemens Industry, Inc. Systeme de surveillance, dispositif de signalisation a del en voie, et procede de surveillance d'un dispositif de signalisation a del en voie
EP3480078B1 (fr) * 2017-11-07 2021-06-30 Siemens Mobility AG Signal lumineux et procédé destiné à afficher des signaux pour une voie de circulation
WO2022058425A1 (fr) * 2020-09-21 2022-03-24 Signify Holding B.V. Système d'éclairage, panneau de lentille pour un tel système d'éclairage et procédé de réalisation d'un tel panneau de lentille

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US4182977A (en) † 1978-06-01 1980-01-08 Trw Inc. Constant output light emitting device
WO1998049872A1 (fr) † 1997-04-30 1998-11-05 Signal House Limited Feux de signalisation
DE19744210A1 (de) † 1997-09-30 1999-04-01 Siemens Ag Verfahren zum Prüfen der Leuchtdioden eines Leuchtdiodenfeldes und Einrichtung zum Durchführen des Verfahrens
DE19744209A1 (de) † 1997-09-30 1999-04-01 Siemens Ag Einrichtung zum Prüfen der Leuchtdioden eines Leuchtdiodenfeldes
US6614358B1 (en) † 2000-08-29 2003-09-02 Power Signal Technologies, Inc. Solid state light with controlled light output
US6741351B2 (en) † 2001-06-07 2004-05-25 Koninklijke Philips Electronics N.V. LED luminaire with light sensor configurations for optical feedback
WO2006054234A2 (fr) † 2004-11-19 2006-05-26 Koninklijke Philips Electronics N.V. Luminaire a del a retroaction optique obtenue par cartographie d'images sur des capteurs de lumiere segmentes
WO2006067267A1 (fr) † 2004-12-23 2006-06-29 Oy Sabik Ab Illuminateur a del pour regulation de la circulation
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EP1722608A2 (fr) † 2005-05-12 2006-11-15 Siemens Aktiengesellschaft Circuit pour l' alimentation et la surveillance d' un dispositif de signalisation lumineux
US7165896B2 (en) † 2004-02-12 2007-01-23 Hymite A/S Light transmitting modules with optical power monitoring
EP1535820B1 (fr) † 2003-11-25 2007-03-21 Siemens Aktiengesellschaft Signal lumineux
US7294816B2 (en) † 2003-12-19 2007-11-13 Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. LED illumination system having an intensity monitoring system
US7312430B2 (en) † 2005-07-01 2007-12-25 Avago Technologies Ecbuip Pte Ltd System, display apparatus and method for providing controlled illumination using internal reflection
EP1156271B1 (fr) † 2000-05-18 2008-07-30 Sagem Communications Système d'éclairement à détection de défaillance
EP1959715A1 (fr) † 2007-02-07 2008-08-20 Signal House Limited Feu de signalisation de trafic
EP1988752A1 (fr) † 2006-02-23 2008-11-05 Matsushita Electric Works, Ltd. Dispositif d'eclairage a led
US7569807B2 (en) † 2006-08-22 2009-08-04 Koninklijke Philips Electronics N.V. Light source with photosensor light guide

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FI115250B (fi) * 2000-12-13 2005-03-31 Sabik Ab Oy Liikenteen ohjausvalaisimen valvonta- ja säätölaitteisto
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4182977A (en) † 1978-06-01 1980-01-08 Trw Inc. Constant output light emitting device
WO1998049872A1 (fr) † 1997-04-30 1998-11-05 Signal House Limited Feux de signalisation
DE19744210A1 (de) † 1997-09-30 1999-04-01 Siemens Ag Verfahren zum Prüfen der Leuchtdioden eines Leuchtdiodenfeldes und Einrichtung zum Durchführen des Verfahrens
DE19744209A1 (de) † 1997-09-30 1999-04-01 Siemens Ag Einrichtung zum Prüfen der Leuchtdioden eines Leuchtdiodenfeldes
EP1156271B1 (fr) † 2000-05-18 2008-07-30 Sagem Communications Système d'éclairement à détection de défaillance
US6614358B1 (en) † 2000-08-29 2003-09-02 Power Signal Technologies, Inc. Solid state light with controlled light output
US6741351B2 (en) † 2001-06-07 2004-05-25 Koninklijke Philips Electronics N.V. LED luminaire with light sensor configurations for optical feedback
EP1535820B1 (fr) † 2003-11-25 2007-03-21 Siemens Aktiengesellschaft Signal lumineux
US7294816B2 (en) † 2003-12-19 2007-11-13 Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. LED illumination system having an intensity monitoring system
US7165896B2 (en) † 2004-02-12 2007-01-23 Hymite A/S Light transmitting modules with optical power monitoring
WO2006054234A2 (fr) † 2004-11-19 2006-05-26 Koninklijke Philips Electronics N.V. Luminaire a del a retroaction optique obtenue par cartographie d'images sur des capteurs de lumiere segmentes
WO2006067267A1 (fr) † 2004-12-23 2006-06-29 Oy Sabik Ab Illuminateur a del pour regulation de la circulation
WO2006099732A1 (fr) † 2005-03-23 2006-09-28 Tir Systems Ltd. Appareil et procede pour recueillir et detecter de la lumiere emise par un appareil d'eclairage
EP1722608A2 (fr) † 2005-05-12 2006-11-15 Siemens Aktiengesellschaft Circuit pour l' alimentation et la surveillance d' un dispositif de signalisation lumineux
US7312430B2 (en) † 2005-07-01 2007-12-25 Avago Technologies Ecbuip Pte Ltd System, display apparatus and method for providing controlled illumination using internal reflection
EP1988752A1 (fr) † 2006-02-23 2008-11-05 Matsushita Electric Works, Ltd. Dispositif d'eclairage a led
US7569807B2 (en) † 2006-08-22 2009-08-04 Koninklijke Philips Electronics N.V. Light source with photosensor light guide
EP1959715A1 (fr) † 2007-02-07 2008-08-20 Signal House Limited Feu de signalisation de trafic

Also Published As

Publication number Publication date
WO2011045663A1 (fr) 2011-04-21
ITUD20090184A1 (it) 2011-04-17
EP2488401A1 (fr) 2012-08-22
IT1396088B1 (it) 2012-11-09
EP2488401B1 (fr) 2013-08-07

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