EP0974947B1 - Appareil de signalisation lumineuse et procédé de contrôle de l'appareil de signalisation - Google Patents

Appareil de signalisation lumineuse et procédé de contrôle de l'appareil de signalisation Download PDF

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Publication number
EP0974947B1
EP0974947B1 EP99113241A EP99113241A EP0974947B1 EP 0974947 B1 EP0974947 B1 EP 0974947B1 EP 99113241 A EP99113241 A EP 99113241A EP 99113241 A EP99113241 A EP 99113241A EP 0974947 B1 EP0974947 B1 EP 0974947B1
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EP
European Patent Office
Prior art keywords
light
signal
emitting diodes
light sensor
signalling 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.)
Expired - Lifetime
Application number
EP99113241A
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German (de)
English (en)
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EP0974947A1 (fr
Inventor
Peter Wenter
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Siemens AG
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Siemens AG
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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/095—Traffic lights
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/097—Supervising of traffic control systems, e.g. by giving an alarm if two crossing streets have green light simultaneously
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/58—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving end of life detection of LEDs
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection

Definitions

  • the invention relates to a light signal system according to the preamble of claim 1 and a method to monitor this traffic light system.
  • a traffic signal generator is also known, in which light-emitting diodes as a light source on a circuit board are arranged in a configuration that matches the pattern a traffic sign.
  • LEDs are related to deviations from the nominal voltage, i.e. with voltage drops far more sensitive than incandescent lamps. According to the known solution a significant loss of light at a level below the nominal voltage lying operating voltage avoided in that the LEDs in individual, connected in series with each other Chains are arranged, the light emitting diode chains are.
  • FR 2 672 145 A1 describes a device for detection known from lamp errors in tri-color light signal systems, which has three photodetectors each assigned to a lamp, the photodetectors each a part of a Lamp emitted luminous flux received. There will be the output signals of the photodetectors in logic circuits evaluated for lighting errors and alarm signals triggered if necessary.
  • the photo detectors can be on the reflector or on the Version of the lamps may be arranged.
  • the present invention is therefore based on the object a light signal system of the type mentioned with a Monitor to create that on the properties of the light emitting diodes used as the light source are precisely matched and a corresponding method for monitoring the traffic light system.
  • the first subtask is the light signal system type mentioned in the characterizing part of the claim 1 described features solved.
  • the solution to the others Partial task is characterized by the claim 1 dependent method claim described.
  • the LEDs with a pulsed operating voltage supplied, the z. B. by full-wave rectification is derived from the AC line voltage.
  • this Context is particularly advantageous in that also gives a characteristic light sensor signal whose Pulse frequency matches the mains frequency.
  • the amplitude value this light sensor signal is a measure of the current luminous flux emitted by the LED matrix.
  • the Signal frequency is a clear quantity that the Light source is switched on.
  • the invention is also the functional state of the Monitor light sensor yourself. This tests the light sensor are carried out during switching breaks of the signal generator.
  • test diode Around thereby producing no perceptible flashes of light these tests not by means of the LEDs, but under Using a test diode, the radiation in the invisible area and their partial radiation is detected by the light sensor.
  • the test signal is also pulse-shaped, but of a pulse rate that is unique deviates from the mains frequency. This is clearly too distinguish whether the light sensor signal by the light emitting diodes or triggered by the test diode.
  • the monitoring device including switching and evaluation device finally integrated into the signal generator, so that it too an easy exchange of the different light sources is possible.
  • Figure 1 is a light signal system in the form of a block diagram shown as an example with two signal transmitters 1.
  • Each of these signal transmitters 1 is a signal transmitter control 2 assigned directly in the housing of the signal generator 1 is arranged. Via supply and control lines that each of these signal generators is to be described in detail 1 or its signal generator control 2 with a Switching and evaluation device 3 connected. This is your turn connected to a device controller 4, which in known Way the operating states of the signal generator 1 accordingly controls a predetermined signal schedule.
  • FIG. 2 illustrates the structure of the signal generator 1, its housing is covered on the front by a lens 5.
  • This lens 5 is analogous to known lenses conventional signal generator designed so that here a detailed description is unnecessary.
  • Inside the signal generator 1 is at a predetermined distance from this lens 5 and essentially parallel to it in a two-dimensional one Matrix a plurality of radiation-intensive light-emitting diodes arranged, hereinafter referred to as signal diodes 6 become. These form in their entirety and controlled together an extensive light source for the signal generator 1. This field of signal diodes is controlled together 6 through the already mentioned signal generator control 2, as will be explained.
  • the immediate occurs Monitoring the radiation status of the signal diodes 6 by a light sensor 7, preferably as a photodiode is trained. You could easily use this light sensor 7 facing the signal diodes 6, for example on the inside arrange the lens 5. However, this is not necessary. It is more advantageous with regard to the arrangement and wiring the matrix of the signal diodes 6 and the Light sensor 7 also this as another element in the Arrange the level of the signal diodes 6. With this arrangement of the Light sensor 7 is exploited that part of the signal diodes 6 emitted light on the inside of the Diffuser is reflected and shines on the light sensor 7.
  • a correspondingly amplified and weighted output signal the light sensor 7 is thus a measure of the current Signaling state of the signal generator 1 or its Signal diodes 6. This function of the light sensor is shown in FIG 7 by partial beams reflected on the lens 5 8 indicated schematically.
  • This test diode 9 is chosen such that it is in the invisible range radiates, but their radiation is still in the range of sensitivity of the light sensor 7. Let these boundary conditions in combination with today's usual components of light sensor 7 and test diode 9 also quite possible.
  • the switching and evaluation device 3 controls 2 mains AC voltage u ⁇ is fed. So it is possible in one by the Switching and evaluation device 3 found defective and the signaling state, which is a danger to traffic 1 disconnect from the mains. Furthermore, the switching and Evaluation device 3 control signals s6 and s9. It serves the control signal s6 for switching the signal generator on and off 1, more precisely the signal diodes 6 and will be below referred to as signal control signal s6. The other of the Switching and evaluation device 3 the signaling controls 2 supplied control signal is used to switch the Test diode 9 and is therefore subsequently used as a test control signal designated s9.
  • the signal generator controls 2 receives the Switching and evaluation device 3, on the other hand, a signal, the an output signal preprocessed in the signal generator controls 2 of the corresponding light sensors 7.
  • These signals are now referred to as light sensor signals s7. As shown in FIG. 1, these signals can each individually on separate lines between the switching and Evaluation device 3 and the signal generator controls 2 could be transmitted, alternatively this line multiple replaced by a serial transmission device become.
  • the signal generators 1 is now the signal generator controls 2 assigned, each a full-wave rectifier 12 provided to which the AC line voltage u ⁇ is supplied.
  • the light sensor 7 is thus permanently prepared as long as AC mains voltage u ⁇ is present. That modulated by the radiation received Output signal of the light sensor 7 is via an amplifier stage 13 fed to a high-pass filter 14 and finally via a signal shaping stage 15 as a preprocessed light sensor signal s7 delivered to the switching and evaluation device 3.
  • the function of the high-pass filter 14 to point is the function of the high-pass filter 14 to point.
  • the light sensor 7 not only receives from the lens 5 reflected light of the signal diodes or the test diode, but also through the lens 5 incoming light from the environment, in particular one Daylight.
  • this scattered light is to be understood as an interference. But it can be assumed that the intensity this stray light from outside in relation to the modulation frequency of the signal diodes 6 as is to be regarded more or less uniformly. This results this interference in a DC component of the output signal of the light sensor 7, which is just over the high-pass filter 14 is eliminated.
  • the dimensioning of this high-pass filter the higher the modulation frequency, the easier it is the signal diodes is 6.
  • one passive high-pass filter would be an active filter stage, e.g. realized by "Sample & Hold" circuits possible if it would be necessary to make very short-term changes to take into account relatively radiation-intensive scattered light.
  • the monitoring device described above for with Signaling devices equipped with LEDs now make it possible to continuously or the signal transmitters at shorter intervals 1 to check that they are working properly. Tested are the two possible target states of a signal generator 1 in which it should be activated or deactivated.
  • FIG. 6 the case is now in the form of a pulse diagram shown, in which the signal generator 1 is to be switched off (Desired state "Off").
  • the actual state is now based on the Light sensor signal s7 detected.
  • FIG. 6 shows that the light sensor signal s7 in the example shown with a small one determined by its operating parameters Delay the course of the test control signal s9 immediately follows. To also in this case by the interference mentioned To be able to control the incident light well, the Frequency of the test control signal s9 be at least a few Hz. If now, as shown in Figure 6, the light sensor signal s7 the test control signal with a predetermined amplitude reflects s9 immediately, the result is like follows to evaluate. On the one hand, the actual status of the signal generator is correct 1 matches the current target state and on the other hand it is also found that the light sensor 7 is working properly works. The operating state of the monitored Signal generator 1 is therefore error-free.
  • FIG. 7 Again it is Target state of signal generator 1 "Off". Again in this state of the signaling device 1 that is switched off as intended or its signal diodes 6 generates the test control signal s9 and thus the test diode 9 is activated in a pulsed manner.
  • the light sensor signal s7 due to a pulse train marked, the short-term, with double network frequency shows successive dips.
  • FIG. 9 illustrates the case in which the not monitored signal generator 1 in a target state "on" is switched on. In this case, they already come back using the pulse shapes described for FIG Test control signal s9 and the light sensor signal s7. That means, the monitored signal generator is switched off. Sollund Actual state do not match. The monitored signal generator 1 works incorrectly.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)
  • Testing Or Measuring Of Semiconductors Or The Like (AREA)

Claims (12)

  1. Appareil (1) de signalisation lumineuse comprenant au moins un générateur (1) de signal, qui a une source de lumière et comme recouvrement transparent un diffuseur (5) et comprenant un dispositif (2, 7, 9) de contrôle de l'état de bon fonctionnement de la source de lumière, le dispositif (2, 7, 9) de contrôle comportant un capteur (7) de lumière disposé dans le trajet du rayonnement de la source de lumière ainsi qu'un dispositif (3) d'évaluation qui est relié à ce capteur et qui est destiné à comparer un signal (s7) de capteur de lumière produit par le capteur de lumière à une valeur de consigne donnée à l'avance, qui correspond à un état de fonctionnement normal de la source de lumière, caractérisé en ce que la source de lumière est formée de diodes (6) électroluminescentes disposées sous la forme d'une matrice, et en ce que le capteur (7) de lumière est placé dans le plan des diodes (6) électroluminescentes et est orienté comme celles-ci sur le diffuseur (5), le capteur (7) de lumière recevant un rayonnement partiel des diodes (6) électroluminescentes, réfléchi sur le diffuseur (5).
  2. Appareil de signalisation lumineuse suivant la revendication 1, caractérisé en ce que à la matrice des diodes (6) électroluminescentes est associée directement une commande (2) de générateur de signal, à laquelle est envoyée, comme tension (u=) de fonctionnement sous forme d'impulsions pour les diodes (6) électroluminescentes, une tension (u~) du réseau alternatif redressé par un dispositif (12) redresseur.
  3. Appareil de signalisation lumineuse suivant la revendication 2, caractérisé en ce que dans la commande (2) de générateur de signal est prévue une unité (13, 14, 15) de prétraitement, qui est raccordée à la sortie du capteur (7) de lumière, qui est destinée à traiter le signal de sortie de ce dernier et qui envoie au dispositif (3) d'évaluation le signal (s7) de capteur de lumière en tant que signal traité.
  4. Appareil de signalisation lumineuse suivant la revendication 3, caractérisé en ce que l'unité (13, 14) de prétraitement a un préamplificateur qui est raccordé à la sortie du capteur (7) de lumière, qui est relié à un filtre (14) passe haut et auquel est raccordé, en tant qu'étage de sortie, un étage (15) de formation du signal.
  5. Appareil de signalisation lumineuse suivant l'une des revendications 1 à 4, caractérisé en ce qu'il est disposé, dans le plan des diodes (6) électroluminescentes, une diode (9) de test, dont le rayonnement émis se trouve à l'extérieur du domaine visible du spectre et en ce que la sensibilité spectrale du capteur (7) de lumière est telle qu'il détecte le domaine spectral de la diode (9) de test tout comme celui des diodes (6) électroluminescentes émettant de la lumière visible.
  6. Appareil de signalisation lumineuse suivant la revendication 5, caractérisé en ce que le dispositif (3) d'évaluation est constitué en outre en dispositif de commutation et est relié à la commande (2) de générateur de signal par des lignes pour le signal, par lesquelles les signaux (s6, s9) de commande sont transmis, pour l'activation étagée dans le temps des diodes (6) électroluminescentes ou de la diode (9) de test, à la commande (2) du générateur de signal.
  7. Appareil de signalisation lumineuse suivant la revendication 6, caractérisé en ce que le dispositif (3) d'évaluation comprend des moyens de comparaison des deux valeurs ("débranchée"/"branchée") de consigne du générateur (1) de signal à son état réel défini par l'état correspondant du signal (s7) du capteur de lumière.
  8. Appareil de signalisation lumineuse suivant la revendication 7, caractérisé en ce que le dispositif (3) d'évaluation a des moyens de comparaison de l'amplitude du signal (s7) du capteur de lumière à une valeur de consigne donnée à l'avance, correspondant à une valeur nominale du rayonnement émis par les diodes (6) électroluminescentes.
  9. Appareil de signalisation lumineuse suivant l'une des revendications 1 à 8, caractérisé en ce que le dispositif (3) d'évaluation est relié à une commande (4) d'appareil classique en soi pour un ou pour plusieurs générateurs (1), des programmes de signal pour le ou les générateurs (1) de signal raccordés étant mis dans cette commande (4) d'appareil.
  10. Procédé de contrôle d'un appareil de signalisation lumineuse suivant la revendication 1, caractérisé en ce que l'on envoie aux diodes (6) électroluminescentes dans l'état de signalisation actif une tension (u=) de fonctionnement pulsé formée à partir de la tension (u~) alternatif du réseau et en ce que l'on prétraite le signal de sortie du capteur (7) de lumière pré-amplifié, ainsi que filtré, dans un passe-haut en un signal (s7) pulsé de capteur de lumière, qui est modulé, dans l'état de signalisation actif des diodes (6) électroluminescentes, en fonction de la fréquence de répétition des impulsions de la tension (u=) de fonctionnement pulsé.
  11. Procédé de contrôle d'un appareil de signalisation lumineuse suivant la revendication 10, caractérisé en ce que l'on forme la tension (u=) de fonctionnement pulsé en redressant la tension (u~) alternatif du réseau et en ce que, lorsque les diodes (6) électroluminescentes sont activées, on module la fréquence du signal (s7) pulsé du capteur de lumière en fonction de la fréquence de la tension (u~) de la tension du réseau alternatif.
  12. Procédé de contrôle d'un appareil de signalisation lumineuse suivant l'une des revendications 10 ou 11, caractérisé en ce que l'on évalue la fréquence et l'amplitude du signal (s7) du capteur de lumière en le comparant à des valeurs de consigne données à l'avance et qu'on en déduit des valeurs réelles correspondantes de l'état de commutation des diodes (6) électroluminescentes ou de leurs flux lumineux émis instantanément, en ce que, s'il n'y a pas coïncidence entre l'état de consigne instantané et l'état réel, on produit un signal de défaut et on l'envoie à une commande (4) d'appareil, dans laquelle est mémorisé un programme de signal pour le générateur (1) de signal ou les générateurs (1) de signal raccordé, et en ce que cette commande remet ensuite le ou les générateurs (1) de signal raccordé dans un état de défaut défini.
EP99113241A 1998-07-23 1999-07-06 Appareil de signalisation lumineuse et procédé de contrôle de l'appareil de signalisation Expired - Lifetime EP0974947B1 (fr)

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DE19833209 1998-07-23
DE19833209 1998-07-23

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EP0974947A1 EP0974947A1 (fr) 2000-01-26
EP0974947B1 true EP0974947B1 (fr) 2004-12-15

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AT (1) ATE285103T1 (fr)
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Cited By (2)

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Publication number Priority date Publication date Assignee Title
DE102009005920A1 (de) 2009-01-23 2010-07-29 Hella Kgaa Hueck & Co. Verfahren und Vorrichtung zum Steuern mindestens einer Lichtzeichenanlage eines Fußgängerüberwegs
US8237590B2 (en) 2008-04-28 2012-08-07 GE Lighting Solutions, LLC Apparatus and method for reducing failures in traffic signals

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FR2807911A1 (fr) * 2000-04-14 2001-10-19 Emmanuel Berque Dispositif de detection de consommation electrique de signaux pietons lumineux
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EP1352544A2 (fr) * 2001-01-09 2003-10-15 Gelcore Llc Signalisation a diodes electroluminescentes permettant de detecter une degradation de lumiere, dotee d'un collecteur a conduite de lumiere
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CN102270367A (zh) * 2010-06-04 2011-12-07 尤尼帕特铁路有限公司 用在固定警报或指示信号器中的光源
EP2628652B1 (fr) * 2012-02-14 2014-04-30 Siemens Schweiz AG Source de lumière LED pour un signal ferroviaire
DE102014119623A1 (de) * 2014-12-23 2016-06-23 Pintsch Bamag Antriebs- Und Verkehrstechnik Gmbh LED-Lichtmodul, Signalleuchte mit einem solchen Lichtmodul sowie Verfahren zum Betreiben eines solchen Lichtmoduls
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Cited By (2)

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Publication number Priority date Publication date Assignee Title
US8237590B2 (en) 2008-04-28 2012-08-07 GE Lighting Solutions, LLC Apparatus and method for reducing failures in traffic signals
DE102009005920A1 (de) 2009-01-23 2010-07-29 Hella Kgaa Hueck & Co. Verfahren und Vorrichtung zum Steuern mindestens einer Lichtzeichenanlage eines Fußgängerüberwegs

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Publication number Publication date
ATE285103T1 (de) 2005-01-15
DE59911260D1 (de) 2005-01-20
EP0974947A1 (fr) 2000-01-26

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