EP2979954A2 - Unité del pour émetteur de signaux lumineux, émetteur de signaux lumineux ayant une telle unité et procédé de surveillance d'une chaine de del d'une unité del - Google Patents

Unité del pour émetteur de signaux lumineux, émetteur de signaux lumineux ayant une telle unité et procédé de surveillance d'une chaine de del d'une unité del Download PDF

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Publication number
EP2979954A2
EP2979954A2 EP15178874.2A EP15178874A EP2979954A2 EP 2979954 A2 EP2979954 A2 EP 2979954A2 EP 15178874 A EP15178874 A EP 15178874A EP 2979954 A2 EP2979954 A2 EP 2979954A2
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EP
European Patent Office
Prior art keywords
led
voltage
unit
function
switching
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
EP15178874.2A
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German (de)
English (en)
Other versions
EP2979954A3 (fr
EP2979954B1 (fr
Inventor
Helmut Ulmer
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.)
Pintsch GmbH
Original Assignee
Pintsch Bamag AG
Pintsch Bamag Antriebs und Verkehrstechnik GmbH
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.)
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Publication date
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Publication of EP2979954A2 publication Critical patent/EP2979954A2/fr
Publication of EP2979954A3 publication Critical patent/EP2979954A3/fr
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Publication of EP2979954B1 publication Critical patent/EP2979954B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L7/00—Remote control of local operating means for points, signals, or track-mounted scotch-blocks
    • B61L7/06—Remote control of local operating means for points, signals, or track-mounted scotch-blocks using electrical transmission
    • B61L7/08—Circuitry
    • B61L7/10—Circuitry for light signals, e.g. for supervision, back-signalling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L29/00—Safety means for rail/road crossing traffic
    • B61L29/24—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning
    • B61L29/28—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning electrically operated
    • 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
    • B61L5/1836—Daylight signals using light sources of different colours and separate optical systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L9/00—Illumination specially adapted for points, form signals, or gates
    • B61L9/04—Illumination specially adapted for points, form signals, or gates electric
    • 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
    • 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]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/375—Switched mode power supply [SMPS] using buck topology
    • 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
    • H05B45/54—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits in a series array of LEDs
    • 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]
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
    • G08B5/38—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources using flashing light
    • 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]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/38—Switched mode power supply [SMPS] using boost topology

Definitions

  • the invention relates to an LED unit for light signal transmitter, in particular for level crossings and provided with a corresponding unit of light signal transmitter, in particular for level crossings.
  • the invention also relates to a method for monitoring at least one LED string of an LED unit.
  • light signals for level crossings serve to generate optical signals at level crossings, warning the road users of an approaching train.
  • they are constructed so that a yellow and a red signal light are arranged on a post above a so-called St. Andrew's Crossing, at the approach of a train first the yellow signal light is turned on to give the road users opportunity to clear the immediate danger area, then what after a certain period of time, eg 3 to 5 seconds, the red signal light is switched on to indicate that the danger zone must not be retracted or entered.
  • optical signal transmitters which use so-called two-filament incandescent lamps, each having a so-called main and a secondary filament (also called substitute filament), which are spatially offset in the incandescent lamp, wherein the secondary filament serves to a functioning of the incandescent lamp in case of failure of the main thread to secure and thus virtually forms an internal "replacement lamp". If the main thread fails, switching to the secondary thread takes place automatically, whereby switching over is simultaneously recognized as a fault so that the required lamp replacement can be displayed to the service personnel.
  • main and a secondary filament also called substitute filament
  • a LED light signal which serves to replace the conventional two-filament incandescent lamps and simulates the behavior of a conventional two-filament incandescent lamp, so that in a function of a light signal transmitter monitoring monitoring interlocking in particular by a conventional power monitoring a failure of a "main thread" and can be switched to the "secondary thread".
  • level crossing light signal generator is additionally attached as a side light to an existing traffic light traffic signal transmitter (i.d., at a traffic light).
  • traffic light traffic signal transmitter i.d., at a traffic light
  • Such arrangements can be found at road junctions in the area of a railroad crossing.
  • light signal transmitters as so-called “single lights” in the colors yellow, red and green.
  • EP 1 045 360 A1 a method for operating a light signal signaling system is known in which the red light of the traffic light signal transmitter is to be used simultaneously as a red light for a railway transition light signal generator, so that can be dispensed with separate, juxtaposed light signal transmitter for railroad crossing and road traffic.
  • EP 1 045 360 A1 suggests the respective Red signal to form by a plurality of LEDs, which are divided into several series circuits. There is also the problem of functionality monitoring when using high-power LEDs.
  • Fig. 3 exemplifies the course of diode forward voltages U of the two LED strands of such LED unit over time, with values shown as triangles for the first and shown as squares values for the second LED string of the LED unit.
  • the switch-on of the LED unit is at the intersection of the time axis with the ordinate.
  • the diode forward voltage decreases in an initialization phase until time t1, in particular due to heating of the LEDs until a stabilization below a threshold value occurs.
  • different heating of the LED strands in particular after the initialization phase and from the onset of stabilization, differences in the diode flux voltages between the LED strands increase.
  • the object of the invention is to enable LED units and their operation with high reliability for traffic lights, especially for level crossings, which are improved under at least one of the following aspects: reliability, cost, low retrofit, maintenance, life.
  • the second threshold is a voltage threshold for the first derivative after the time of, for example, in FIG Fig. 3 illustrated stress curves.
  • said time, in particular the end of the initialization phase is approximately 0.5 to 3 seconds, advantageously approximately 1 to 2 seconds after the time of the start of the first control function, ie the alternating switching on of the LED strings.
  • the said different switch-on phases of one of the LED strands are temporally spaced apart from another of the LED strands in time only by a switch-on phase.
  • the time after switching on the LED unit is eg time from a time of Turning the LED unit spaced by a first turn-on of the first LED strand and a first turn-on of the second LED strand.
  • the first threshold is less than the second threshold and is between about 0.5 and 1 volt, preferably between about 0.6 and 0.8 volt, and more preferably about 0.7 volt.
  • the second threshold is between about 0.8 and 1.2 volts, preferably between about 0.9 and 1.1 volts, and more preferably about 1.0 volts.
  • the first and second threshold values can be determined independently of temperature.
  • the above-mentioned advantageous failure detection signal outputs, monitoring or failure signal detection triggers, times and usable different switch-on phases and clamp values are also advantageous aspects of the method according to the invention for monitoring a first LED string and / or a second LED string (12) of a light-emitting diode LED unit comprising a first switching device having a function of connecting the first LED string to a first power source pole and a second switching device having a function of connecting the second LED string to a second power source pole, a reverse pole for each of the first and second power source poles wherein each of the first and second LED strings is connected between one of the first and second switching means and the opposite pole, the method comprising alternately turning on the first and second LED strings with the first and second switching means a first voltage measurement of the diode forward voltage of the first LED string when connected to the first current source pole to the first switching device, a second voltage measurement of the diode forward voltage of the second LED strand when connected to the second Stromettinpol with the second switching device, and a Monitoring
  • the invention is particularly in the in the EP 1 992 542 A2 shown LED assemblies applicable, the disclosure of EP 1 992 542 A2 is incorporated by reference into the present specification.
  • a detection unit function for detection which includes the above-mentioned voltage measurement functions and a comparison of the diode forward voltages detected with the first and second voltage measurement functions, outputs a failure detection signal if the comparison yields at least an absolute value of a voltage difference above a threshold, in particular at first and second LED strands, each with a set of high-power LEDs and possibly the same binning for each power consumption adapted to easily determine a breakdown of one or more individual LEDs of the LED strands by comparing the LED strands, in particular their forward voltages.
  • An input voltage measurement allows a determination of whether an LED string is on.
  • Each set can have, for example, three to six high-power LEDs.
  • the LED unit is arranged on a board, which not only facilitate the retrofitting of light sensors.
  • a board can also ensure thermal coupling of the LEDs of both strings.
  • monitoring or failure detection triggering in the invention are largely independent of temperature and not dependent on a thermal coupling of the LEDs of both strands to allow reliable comparisons of measured voltages.
  • the object of the invention is further achieved by a light signal transmitter, in particular in the form of a signal light for railroad crossings, the lighting means is formed by an LED unit of the invention on a circuit board and an optic comprising a collimator and / or a scattering lens for the alignment of light which is emitted from the LED strings.
  • the light signal transmitter or its LED unit can be operated according to a method corresponding to the functions of the LED unit or its control.
  • LED string is understood here to mean a series connection of LEDs.
  • an LED string according to the invention has two to eight LEDs, preferably three to six LEDs, in particular four LEDs.
  • the forward voltage among the first and second LED strings does not differ by more than 0.7 volts, preferably not more than 0.5 volts.
  • High-power LEDs with a power consumption of 3 to 7 watts, in particular 5 watts, are preferably used in the invention.
  • failure _bei_ the lighting unit is understood here as a complete failure of an LED string, both LED strands and / or individual LEDs in a LED string.
  • the opposite pole may be a battery miniature pole and each of the first and second current source poles may each be a battery plus pole of a separate power source, or the opposite pole may correspond to a battery center tap if the first and second power source poles second power source poles correspond to a pair of Batterieplus- and Batterieminuspol.
  • the duration of the turn-on and / or turn-off phases is between about 0.5 and 5 seconds, advantageously between about 0.5 and 3 seconds, more preferably between about 0.5 and 1 seconds.
  • a monitoring of the diode flux voltage changes takes place between successive switch-on phases of the respective monitored LED string.
  • monitoring of the diode forward voltage changes takes place between successive switch-on phases of this LED string.
  • the first and second LED strings 11, 12 each comprise a set of four high-power LEDs with the same binning.
  • Same binning means that the LEDs are essentially the same Features, including forward voltage and power consumption, so that the two sets of LEDs have a substantially homogeneous power consumption.
  • a light-emitting diode LED unit comprises a lighting unit comprising a first LED string 11 and a second LED string 12, a first switching means 21 having a function of connecting the first LED string 11 to a first power source pole 31, and a first second switching means 22 having a function of connecting the second LED string 12 to a second power source terminal 32, a reverse terminal 4 for both the first and second power source terminals 31, 32, a return terminal common to the first and second LED strings to the opposite terminal 4 wherein each of the first and second LED strings 11, 12 is connected between one of the first and second switching means 21, 22 and the opposite pole 4, a controller (in Fig. 1 not fully shown) of the first and second switching devices 21, 22, which includes a first control function for alternately turning on the first and second LED strings 11, 12 with the first and second switching devices 21, 22.
  • the controller comprises a measuring unit, of which in Fig. 1 Voltage measuring means 51, 52, 61, 62 and current measuring means 81, 82 are shown, and has a function for detecting a failure of the lighting unit and a further function for detecting a failure in the lighting unit.
  • a first subunit T1 of the measuring unit has an input voltage measuring unit 51 for determining whether the first LED string 11 is turned off and consequently the second LED string 12 (according to the control function for alternately turning on the LED strings) to the second current source pole 32 with the second switching means 22 is connected.
  • this input voltage measuring unit 51 is connected in parallel to the first LED string 11 between the first switching device 21 and the return conductor connection.
  • the first subunit T1 of the measuring unit further has a diode forward voltage measuring unit 62 for detecting the diode forward voltage at the second LED strand 12 to measure.
  • the input voltage measuring unit 51 and the diode forward voltage measuring unit 62 are part of a voltage measuring function of the diode forward voltage of the second LED string 12 when connected to the second current source pole 32 with the second switching device 22.
  • a second subunit T2 of the measuring unit has an input voltage measuring unit 52 for determining whether the second LED string 12 is turned off and consequently the first LED string 11 (according to the control function for alternately switching on the LED strings) to the first current source pole 31 with the first switching means 21 is connected.
  • this input voltage measuring unit 52 is connected in parallel with the second LED string 12 between the second switching device 22 and the return conductor connection.
  • the second subunit T2 of the measuring unit further has a diode forward voltage measuring unit 61 for measuring the diode forward voltage on the first LED leg 11.
  • the input voltage measurement unit 52 and diode forward voltage measurement unit 61 are part of a voltage measurement function of the diode forward voltage of the first LED string 11 when connected to the first power source pole 31 with the first switching device 21.
  • the function for detecting the measuring unit comprises a comparison of the diode forward voltages determined with the two subunits T1, T2 and voltage measuring functions and a failure detection signal output if the comparison yields at least one absolute value of a voltage difference above a threshold value.
  • a threshold value a first value is provided in a first execution of the first control function in an initialization of the LED unit and a second value in each further execution of the first control function, wherein the first value is lower than the second value.
  • the first value is set at 0.7 volts and the second value at 1.0 volts.
  • the determination is made as to whether the first or second LED string with the respective switching device 21, 22 is connected to the respective current source pole 31, 32, in accordance with the above in connection with the subunits T1, T2 and their input voltage measuring units 51, 52 functions described.
  • the switching devices 21, 22 are each part of a pulse-width modulated current source (PWM current source) of the respective LED string 11, 12, which they can connect to one of the current source poles 31, 32.
  • PWM current source pulse-width modulated current source
  • the PWM current sources of the positive pole as Stromettinpol 31, 32 alternately each one of the LED strands 11, 12, which are connected via the return terminal or a return conductor, which are connected to minus.
  • the LED unit is formed on a board with thermal coupling under the first and second LED strings 11, 12.
  • Fig. 2 illustrates in more detail an embodiment with the in Fig. 1 illustrated subunits T1, T2.
  • the above power sources have pulse width modulated DC-DC converters.
  • the first LED string 11 is connected between a first one of the DC-DC converter and the opposite pole 4, and the first switching means 21 comprises a MOSFET as a voltage-controlled switch 91 for the function for connecting the first LED string 11 to the first current source pole 31.
  • the second LED string 11 Strand 12 is connected between a second of the DC-DC converter and the opposite pole 4, and the second switching device 22 comprises two MOSFETs as a voltage-controlled switch 92 for the function of connecting the second LED string 12 to the second current source pole 32 or as another voltage-controlled switch 112B for connection of the second LED string 12 to the opposite pole 4.
  • the first and second DC-DC converters are buck converters.
  • a gate of the voltage controlled switch 92 for connecting the second LED string 12 to the second current source terminal 32 receives a signal from the controller via a circuit signal resistor 92A.
  • switches 91, 92 are designed as MOSFETs. They are driven by switch signal resistors 91A, 92A from the controller (not shown). The controller ensures the first and second control functions via the DC-DC converters.
  • Fig. 2 illustrates the voltage monitoring with the subunits T1 and T2 to Fig. 1 described embodiment, wherein it is provided that the opposite pole 4 a Batterieschabgriff, the first Stromettinpol 31 a Batteriepluspol and the second Stromettinpol 32 corresponds to a Batterieminuspol.
  • the illustrated voltage monitoring is thus particularly useful for voltage monitoring of two batteries.
  • the second DC-DC converter is a buck converter with the opposite pole 4 and the second voltage source pole 32 as the voltage output and the second LED strand 12 and the second voltage source pole 32 at the voltage input and a diode 112.
  • 2 is a through a battery center tap obtained pole provided.
  • the second power source pole 32 is the battery negative pole in the illustrated embodiment.
  • each of the first DC-DC converter at the first current source pole 31 and the first LED string 11 and the second DC-DC converter at the second current source pole 32 and the second LED string 12 is respectively one of the partial units T1 and T2 for voltage measurements via sets of resistors R5 , R7 or R6, R8 connected.
  • Each of the subunits T1, T2 in each case has two combinations of a comparator N5, N6, N7, N8 and a measuring resistor R5, R6, R7, R8 connecting the comparator inputs.
  • comparators are connected to each other via inputs of different polarity and the corresponding connection branches to the opposite pole 4, ie the battery center tap.
  • a comparator pair formed from comparators N5, N6 of the first and second subunits T1, T2 is in this case connected with its plus inputs via resistors R9, R12 to the first LED string 11, with its connected to the choke coil 101 of the first DC-DC converter The End.
  • another pair of comparators N7, N8 selected from the first and second sub-units T1, T2 are connected with their minus inputs via resistors R10, R11 to the second LED string 12, respectively, with its associated with the choke coil 102 of the second DC-DC converter The End.
  • an input voltage of the first LED string 11 is obtained at the output of the comparator N5, at the output of the comparator N6 a diode forward voltage of the first LED string 11 is obtained at the output of the comparator N7 an input voltage of the second LED Strand 12 is obtained and at the output of the comparator N8 a diode forward voltage of the first LED string 11 is obtained.
  • Under preserved Voltage is to be understood as a voltage value representing the corresponding voltage.
  • the LEDs of both LED strands 11, 12 need not be on a board and with thermal coupling, e.g. be arranged by a common placement of the LEDs of the first and second groups on a printed circuit board and a heat sink to allow voltage monitoring such that LEDs with different voltage BINs can be operated up to the maximum permissible line resistance.
  • a replacement type should not be used until a voltage reference has been changed.
  • the voltage monitoring can reliably detect a short circuit in an LED string 11, 12, in particular as a result of the breakdown of an LED in one of the LED strings.
  • a voltage monitoring based on a comparison of the two LED strands 11, 12 in an initialization phase for example up to a as in Fig. 3 illustrated time t1 after switching on the LED unit, used.
  • the initialization phase can also include only one activation for each of the two LED strings 11, 12, ie in each case the first activation from switching on the LED unit. In other words, this initialization phase comprises an alternating activation of the two LED strands 11, 12.
  • the duration of the switch-on phases is advantageously selected to be between approximately 0.5 and 5 seconds, more preferably between approximately 0.5 and 3 seconds, and in particular between approximately 0.5 and 1 seconds.
  • monitoring of the diode forward voltage changes takes place between successive switch-on phases of the respective monitored LED string.
  • monitoring of the diode forward voltage changes takes place between successive switch-on phases of this LED string.
  • the voltage of both LED strands 11, 12 resulting from the respective diode forward voltages of the strand LEDs is determined as initialization.
  • the difference between the two voltages must not be greater than 0.7 volts in this example. If this is ensured as initialization, the operating phase (normal operation) begins. In the operating phase is then monitored whether no voltage jump greater than 1 volt has occurred from the last voltage value. A temperature tracking of the voltage limits is not necessary and is eliminated.
  • a procedure performed with the LED unit works with appropriate tolerance specification of the comparison independent of the voltage BIN of the LEDs. If there is a failure of an LED, a difference of the diode forward voltages of both LED strands 11, 12 ⁇ 0 and exceeds or falls below this one provided detectable tolerance. Narrow tolerance is allowed because forward voltage fluctuations due to production tolerances of the LEDs are averaged by comparing forward voltages of the first and second groups. In the monitoring of the pair of first and second LED string 11, 12, it is provided that the LEDs in each of the strings are traversed by an equal size LED current.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Led Devices (AREA)
EP15178874.2A 2014-07-29 2015-07-29 Unite del pour emetteur de signaux lumineux, emetteur de signaux lumineux ayant une telle unite et procede de surveillance d'une chaine de del d'une unite del Active EP2979954B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014110699 2014-07-29

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EP2979954A2 true EP2979954A2 (fr) 2016-02-03
EP2979954A3 EP2979954A3 (fr) 2016-02-10
EP2979954B1 EP2979954B1 (fr) 2020-12-23

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EP15178874.2A Active EP2979954B1 (fr) 2014-07-29 2015-07-29 Unite del pour emetteur de signaux lumineux, emetteur de signaux lumineux ayant une telle unite et procede de surveillance d'une chaine de del d'une unite del

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DE (1) DE102015112404A1 (fr)

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EP3787379A1 (fr) * 2019-08-30 2021-03-03 Siemens Mobility AG Système et procédé de vérification du luminaire d'un point d'éclairage équipé d'au moins un moyen d'éclairage à led

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EP0955619A1 (fr) 1998-05-05 1999-11-10 Sagem Sa Procédé de gestion d'une source de lumière de signalisation routière
EP1045360A1 (fr) 1999-04-14 2000-10-18 Scheidt & Bachmann Gmbh Procédé de fonctionnement d'un appareil de signalisation lumineuse
DE19929430A1 (de) 1999-06-26 2001-01-11 Abb Daimler Benz Transp Leuchtdioden-Schlußleuchte
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EP1965609A2 (fr) 2007-02-27 2008-09-03 Lumination LLC Détection de défaillance de chaîne DEL
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EP2247161A1 (fr) 2009-04-28 2010-11-03 odelo GmbH Reconnaissance d'une panne pour moyen d'éclairage dans des lampes de véhicules automobiles
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3787379A1 (fr) * 2019-08-30 2021-03-03 Siemens Mobility AG Système et procédé de vérification du luminaire d'un point d'éclairage équipé d'au moins un moyen d'éclairage à led
EP3787374A1 (fr) * 2019-08-30 2021-03-03 Siemens Mobility AG Système et procédé de vérification du luminaire d'un point d'éclairage équipé d'au moins un moyen d'éclairage à led

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DE102015112404A1 (de) 2016-02-04
EP2979954A3 (fr) 2016-02-10
EP2979954B1 (fr) 2020-12-23

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