EP0974947B1 - Lichtsignalanlage sowie Verfahren zum Überwachen der Lichtsignalanlage - Google Patents
Lichtsignalanlage sowie Verfahren zum Überwachen der Lichtsignalanlage Download PDFInfo
- 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
- Authority
- 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
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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)
Description
Claims (12)
- Lichtsignalanlage mit mindestens einem Signalgeber (1), der eine Lichtquelle und als transparente Abdeckung eine Streuscheibe (5) besitzt, und mit einer Überwachungseinrichtung (2, 7, 9) zum Überprüfen der Lichtquelle auf deren fehlerfreien Betriebszustand, wobei die Überwachungseinrichtung (2, 7, 9) einen im Strahlengang der Lichtquelle angeordneten Lichtsensor (7) sowie eine mit diesem verbundene Auswerteeinrichtung (3) zum Vergleichen eines durch den Lichtsensor erzeugten Lichtsensorsignales (s7) mit einem vorgegebenen Sollwert aufweist, der einem normalen Betriebszustand der Lichtquelle entspricht, dadurch gekennzeichnet, daß die Lichtquelle durch in Form einer Matrix angeordnete Leuchtdioden (6) gebildet ist, und dass der Lichtsensor (7) in der Ebene der Leuchtdioden (6) angeordnet und wie diese auf die Streuscheibe (5) ausgerichtet ist, wobei der Lichtsensor (7) eine an der Streuscheibe (5) reflektierte Teilstrahlung der Leuchtdioden (6) empfängt.
- Lichtsignalanlage nach Anspruch 1, dadurch gekennzeichnet, daß der in dem Signalgeber (1) angeordneten Matrix der Leuchtdioden (6) eine Signalgebersteuerung (2) unmittelbar zugeordnet ist, der als impulsförmige Betriebsspannung(u=) für die Leuchtdioden (6) Netzwechselspannung (u~), gleichgerichtet über eine Gleichrichteranordnung (12), zugeführt ist.
- Lichtsignalanlage nach Anspruch 2, dadurch gekennzeichnet, daß in der Signalgebersteuerung (2) eine an den Ausgang des Lichtsensors (7) angeschlossene Vorverarbeitungseinheit (13, 14, 15) zum Aufbereiten von dessen Ausgangssignal vorgesehen ist, die als aufbereitetes Signal das Lichtsensorsignal (s7) an die Auswerteeinrichtung (3) abgibt.
- Lichtsignalanlage nach Anspruch 3, dadurch gekennzeichnet, daß die Vorverarbeitungseinheit (13, 14, 15) einen an den Ausgang des Lichtsensors (7) angeschlossenen Vorverstärker (13) aufweist, der mit einem Hochpaßfilter (14) verbunden ist, an das als Ausgangsstufe eine Signalformerstufe (15) angeschlossen ist.
- Lichtsignalanlage nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß in der Ebene der Leuchtdioden (6) eine Testdiode (9) angeordnet ist, deren emittierte Strahlung außerhalb des sichtbaren Spektralbereiches liegt und daß die spektrale Empfindlichkeit des Lichtsensors (7) dabei derart ausgebildet ist, daß er den Spektralbereich der Testdiode (9) ebenso erfaßt wie den der sichtbares Licht emittierenden Leuchtdioden (6).
- Lichtsignalanlage nach Anspruch 5, dadurch gekennzeichnet, daß die Auswerteeinrichtung (3) ferner als Schalteinrichtung ausgebildet ist und mit der Signalgebersteuerung (2) über Signalleitungen verbunden ist, über die Steuersignale (s6, s9) zum zeitlich gestaffelten Aktivieren der Leuchtdioden (6) bzw. der Testdiode (9) an die Signalgebersteuerung (2) übertragen werden.
- Lichtsignalanlage nach Anspruch 6, dadurch gekennzeichnet, daß die Auswerteeinrichtung (3) Mittel zum Vergleichen der beiden Sollzustände ("aus"/"ein") des Signalgebers (1) mit seinem durch den entsprechenden Zustand des Lichtsensorsignales (s7) definierten Istzustand aufweist.
- Lichtsignalanlage nach Anspruch 7, dadurch gekennzeichnet, daß die Auswerteeinrichtung (3) dabei Mittel zum Vergleichen der Amplitude des Lichtsensorsignales (s7) mit einem vorgegebenen, einem Nennwert der von den Leuchtdioden (6) abgegebenen Strahlung entsprechenden Sollwert besitzt.
- Lichtsignalanlage nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Auswerteeinrichtung (3) mit einer an sich konventionellen Gerätesteuerung (4) für einen bzw. mehrere Signalgeber (1) verbunden ist, wobei in dieser Gerätesteuerung (4) Signalprogramme für den bzw. die angeschlossenen Signalgeber (1) abgelegt sind.
- Verfahren zum Überwachen einer Lichtsignalanlage gemäß Anspruch 1, dadurch gekennzeichnet, daß den Leuchtdioden (6) im aktiven Signalzustand eine aus der Netzwechselspannung (u~) gebildete pulsförmige Betriebsspannung (u=) zugeführt wird und daß das Ausgangssignal des Lichtsensors (7) vorverstärkt sowie durch einen Hochpaß gefiltert zu einem pulsförmigen Lichtsensorsignal (s7) vorverarbeitet wird, das im aktiven Signalzustand der Leuchtdioden (6) entsprechend der Pulsfrequenz der pulsförmigen Betriebsspannung (u=) moduliert ist.
- Verfahren zum Überwachen einer Lichtsignalanlage nach Anspruch 10, dadurch gekennzeichnet, daß die pulsförmige Betriebsspannung (u=) durch Gleichrichten der Netzwechselspannung (u~) gebildet wird und daß bei aktivierten Leuchtdioden (6) die Frequenz des pulsförmigen Lichtsensorsignals (s7) entsprechend der Frequenz der Netzwechselspannung (u~) moduliert ist.
- Verfahren zum Überwachen einer Lichtsignalanlage nach einem der Ansprüche 10 oder 11, dadurch gekennzeichnet, daß das Lichtsensorsignal (s7) durch Vergleichen mit vorgegebenen Sollwerten in bezug auf seine Frequenz und seine Amplitude bewertet wird und daraus entsprechende Istzustände für den Schaltzustand der Leuchtdioden (6) bzw. für deren aktuell abgegebenen Lichtstrom abgeleitet werden, daß bei mangelnder Übereinstimmung von momentanem Soll- und Istzustand ein Fehlersignal erzeugt und an eine Gerätesteuerung (4) abgegeben wird, in der ein Signalprogramm für den bzw. die angeschlossenen Signalgeber (1) gespeichert ist, und daß diese daraufhin den bzw. die angeschlossenen Signalgeber (1) in einen definierten Fehlerzustand rücksetzt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19833209 | 1998-07-23 | ||
DE19833209 | 1998-07-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0974947A1 EP0974947A1 (de) | 2000-01-26 |
EP0974947B1 true EP0974947B1 (de) | 2004-12-15 |
Family
ID=7875087
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99113241A Expired - Lifetime EP0974947B1 (de) | 1998-07-23 | 1999-07-06 | Lichtsignalanlage sowie Verfahren zum Überwachen der Lichtsignalanlage |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0974947B1 (de) |
AT (1) | ATE285103T1 (de) |
DE (1) | DE59911260D1 (de) |
Cited By (2)
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 |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2806512A1 (fr) * | 2000-03-15 | 2001-09-21 | Emmanuel Berque | Dispositif de signal pieton lumineux et sonore |
IT1315418B1 (it) * | 2000-04-11 | 2003-02-10 | Pittway Tecnologica Spa | Dispositivo di sicurezza con comunicazione bidirezionale. |
FR2807911A1 (fr) * | 2000-04-14 | 2001-10-19 | Emmanuel Berque | Dispositif de detection de consommation electrique de signaux pietons lumineux |
US6448716B1 (en) | 2000-08-17 | 2002-09-10 | Power Signal Technologies, Inc. | Solid state light with self diagnostics and predictive failure analysis mechanisms |
FI115250B (fi) * | 2000-12-13 | 2005-03-31 | Sabik Ab Oy | Liikenteen ohjausvalaisimen valvonta- ja säätölaitteisto |
FR2818777B1 (fr) * | 2000-12-22 | 2003-03-21 | Giat Ind Sa | Dispositif de surveillance d'un ecran |
CA2434724A1 (en) * | 2001-01-09 | 2002-09-12 | Gelcore Llc | Device to monitor a led traffic light |
WO2002074017A1 (en) * | 2001-03-10 | 2002-09-19 | Siemens Plc | Electrical apparatus and method |
US20030015973A1 (en) * | 2001-07-18 | 2003-01-23 | Kevin Ovens | Solid state traffic light with predictive failure analysis |
DE10206649A1 (de) * | 2002-02-15 | 2003-08-28 | Garufo Gmbh | Anzeigevorrichtung |
FI116356B (fi) * | 2004-02-03 | 2005-10-31 | Teknoware Oy | Järjestelmä kunnonvalvontaa varten |
ATE381243T1 (de) * | 2004-10-07 | 2007-12-15 | Siemens Schweiz Ag | Verfahren zur aktivierung von auf led- leuchtmitteln basierenden signalen |
FI117178B (fi) * | 2004-12-23 | 2006-07-14 | Sabik Ab Oy | LED-valaisin liikenteen ohjaamiseksi |
DE102005032719A1 (de) * | 2005-07-13 | 2007-01-25 | Siemens Ag | Lichtsignalanlage, insbesondere für den Straßenverkehr |
DE102009031808B4 (de) * | 2009-07-03 | 2012-04-19 | Langmatz Gmbh | Anforderungsgerät für eine Verkehrsampel |
IT1396088B1 (it) * | 2009-10-16 | 2012-11-09 | Solari Di Udine S P A | Dispositivo di segnalazione luminosa a led e relativo procedimento di controllo |
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 (de) * | 2012-02-14 | 2014-04-30 | Siemens Schweiz AG | LED-Lichtquelle für ein Zwergsignal |
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 |
CN106473755A (zh) * | 2016-11-30 | 2017-03-08 | 江西科技师范大学 | 一种用于血糖监测的光声探测头 |
DE102018212585A1 (de) * | 2018-07-27 | 2020-01-30 | Siemens Aktiengesellschaft | Lichtsignalanlage mit Schutz vor einem Mastangriff |
Family Cites Families (4)
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US4182977A (en) * | 1978-06-01 | 1980-01-08 | Trw Inc. | Constant output light emitting device |
FR2586844B1 (fr) * | 1985-08-27 | 1988-04-29 | Sofrela Sa | Dispositif de signalisation utilisant des diodes electroluminescentes. |
FR2634339B1 (fr) * | 1988-07-13 | 1995-09-01 | Guillot Francis | Lanterne de signalisation routiere auto-regulee |
FR2672145B1 (fr) * | 1991-01-29 | 1993-05-21 | Electricite De France | Dispositif de detection d'un defaut d'une lampe d'un feu tricolore et installation de controle du trafic comportant un tel dispositif. |
-
1999
- 1999-07-06 EP EP99113241A patent/EP0974947B1/de not_active Expired - Lifetime
- 1999-07-06 AT AT99113241T patent/ATE285103T1/de not_active IP Right Cessation
- 1999-07-06 DE DE59911260T patent/DE59911260D1/de not_active Expired - Fee Related
Cited By (2)
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 |
Also Published As
Publication number | Publication date |
---|---|
ATE285103T1 (de) | 2005-01-15 |
DE59911260D1 (de) | 2005-01-20 |
EP0974947A1 (de) | 2000-01-26 |
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