EP0137964A2 - Device for signal safety in light sign arrangements - Google Patents

Device for signal safety in light sign arrangements Download PDF

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Publication number
EP0137964A2
EP0137964A2 EP84109815A EP84109815A EP0137964A2 EP 0137964 A2 EP0137964 A2 EP 0137964A2 EP 84109815 A EP84109815 A EP 84109815A EP 84109815 A EP84109815 A EP 84109815A EP 0137964 A2 EP0137964 A2 EP 0137964A2
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EP
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Prior art keywords
signal
microprocessor
error
logic
assigned
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EP84109815A
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German (de)
French (fr)
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EP0137964A3 (en
Inventor
Peter Haarmann
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Stuehrenberg Rolf
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Stuehrenberg Rolf
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Publication of EP0137964A2 publication Critical patent/EP0137964A2/en
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    • 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

Definitions

  • the invention relates to a device for securing signals in traffic light systems, with sensors associated with the lamps of the individual signal transmitters and a logic which receives the measurement signals of the transmitter for immediately switching off the traffic light system when an error occurs.
  • a device for signal protection comprises a number of transducers which are assigned to the individual lamps of the traffic light system and which sense their respective status. Usually the current flowing through the lamp is scanned for the red lamps and the voltage level applied to the lamp is scanned for the yellow and green lamps.
  • the transducers are connected to a wired logic which, in the event of an error, supplies an error signal to the control of the traffic light system.
  • the wiring this logic is adapted to the particular circumstances of the traffic light system in question. This has the disadvantage that the logic must be re-wired each time a new traffic light system is installed or an existing system is expanded or changed.
  • the invention has for its object to provide a device for signal protection, in which the wiring of the logic is independent of the particular type of light signal system.
  • the logic is a microprocessor which is connected to the sensors via an address bus and a data bus.
  • the measurement data of the sensors are queried serially by the microprocessor and transmitted via the common data bus. Since the transmitter periodically polls and processes the measurement data in rapid succession, the measurement data is monitored quasi-continuously so that a possible error can be recognized immediately.
  • the wiring of the data bus and the address bus is the same for all types of traffic light systems, and the adaptation to the particular characteristics of the traffic light system is carried out via the user programming of the microprocessor.
  • the lamp switches of each signal transmitter are preferably assigned a specific slot on a circuit board which accommodates the signal protection logic, and each slot is assigned a specific address, so that the microprocessor can query the signal image of each individual signal transmitter by calling up the corresponding address.
  • the single figure shows a block diagram of a device for signal protection according to the invention.
  • a microprocessor 10 is connected to a number of signal generator control units 16 via a data bus 12 and an address bus 14.
  • Each of the control units 16 comprises a lamp switch, which is controlled by a controller (not shown) and which switches the red, yellow and green lamps 18 of the relevant signal transmitter, and sensors which sense the respective state of the lamps 18.
  • the voltage supply for the red and green lamps takes place via lines 20, 22 and the voltage supply for the yellow lamps via line 24 and line 22.
  • a relay 26 is provided in line 20 for the red and green lamps which is controlled by an output of the microprocessor 10.
  • Another output of the microprocessor 10 is connected to an error display 28.
  • Each of the control units 16 is assigned the address of this slot (slot address) by being plugged into a specific slot on a circuit board.
  • the microprocessor 10 includes a central processing unit, an electrically programmable read-only memory (EPROM) and a random access memory (RAM). A basic program and the respective user data are stored in the read-only memory.
  • the RAM memory is used to store intermediate results obtained during data processing in the central processing unit.
  • the microprocessor 10 When the microprocessor 10 is activated by a signal from the control of the traffic light system, it successively calls up the measurement data from the sensors of the individual control units 16 and checks according to the user program whether there is a lamp or locking error. The values of a specific control unit are sampled by calling up their address via the address bus. The control unit then first reports its address back to the microprocessor via the data bus. In this way it can be scanned whether the slot accessed is actually occupied. If there is no feedback, the microprocessor generates an error signal.
  • Each control unit has a selection logic, which uses a binary signal generated by the microprocessor to decide whether the slot address or the measurement data are transmitted via the data bus.
  • the polling cycle begins again. As long as no error is detected, the microprocessor 10 generates a square-wave signal with a frequency of 100 Hz at its output connected to the relay 26. If the microprocessor 10 detects an error, the 100 Hz signal is interrupted.
  • An evaluation circuit not shown, for example. comprising a monoflop, filter capacitors and a rectifier, keeps relay 26 closed as long as the 100 Hz signal is present. Does the signal fail or give way to the Frequency up or down by a certain amount from the value 100 Hz, the relay 26 drops, and all red and green lamps are switched off.
  • a signal with a predetermined frequency (100 Hz) as an error signal has the advantage over the use of a logic signal that the error message is also reliable if, for example, the output of the microprocessor is kept at logic H or L due to a short circuit. Only AC voltages are also transmitted from the lamp switches. If there is no AC voltage at the lamp switch, the relay 26 is also switched off.
  • the microprocessor 10 detects an error, in addition to the signal to the relay 26, a signal is sent to the error display 28, which indicates to the monitoring personnel what type of error it is. At the same time, a signal is supplied to the control of the traffic light system, which then controls the yellow lamps via line 24 in such a way that a yellow flashing warning light is generated on the streets that are not authorized to drive up.

Abstract

Such a device comprises measured value sensors which are assigned to the individual lamps (18) of the signal transmitters and via which measurement signals are transmitted to a monitoring logic (10) which switches off the light sign arrangement as soon as a fault occurs. The logic (10) is a microprocessor which is connected via a data bus (12) and an address bus (14) to the measured value sensors (16). The signal safety device can be adapted to the particular features of the light sign arrangement by programming the microprocessor (10) without any special wiring being necessary. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zur Signalsicherung bei Lichtzeichenanlagen, mit den Lampen der einzelnen Signalgeber zugeordneten Meßwertgebern und einer die Meßsignale der Meßwertgeber aufnehmenden Logik zum sofortigen Abschalten der Lichtzeichenanlage bei Auftreten eines Fehlers.The invention relates to a device for securing signals in traffic light systems, with sensors associated with the lamps of the individual signal transmitters and a logic which receives the measurement signals of the transmitter for immediately switching off the traffic light system when an error occurs.

Bei Lichtzeichenanlagen zur Regelung des Straßenverkehrs ist es aus Sicherheitsgründen erforderlich, die von den einzelnen Signalgebern (Ampeln) erzeugtenSignalbilder fortlaufend zu überwachen. Falls ein sogenannter Lampenfehler auftritt, d.h., falls beispielsweise die Rot-Lampe eines Signalgebers ausfällt, so muß die Lichtzeichenanlage sofort abgeschaltet oder auf ein Notprogramm (gelbes Blinklicht an den nicht vorfahrtberechtigten Straßen) umgeschaltet werden. Entsprechendes gilt, wenn ein sogenannter Verriegelungsfehler auftritt, d..h., wenn beispielsweise die Ampeln zweier sich kreuzender Straßen gleichzeitig auf Grün geschaltet sind. Die Überwachung der Lichtzeichenanlage auf Lampen- und/oder Verriegelungsfehler wird als Signalsicherung bezeichnet.In traffic light systems for regulating road traffic, it is necessary for safety reasons to continuously monitor the signal images generated by the individual signal transmitters (traffic lights). If a so-called lamp error occurs, i.e. if, for example, the red lamp of a signal transmitter fails, the traffic light system must be switched off immediately or switched to an emergency program (yellow flashing light on the streets not authorized to drive in). The same applies if a so-called locking error occurs, i.e. if, for example, the traffic lights of two intersecting streets are switched to green at the same time. Monitoring the traffic light system for lamp and / or locking errors is referred to as signal protection.

Eine Vorrichtung zur Signalsicherung umfaßt eine Anzahl von Meßwertgebern, die den einzelnen Lampen der Lichtzeichenanlage zugeordnet sind und deren jeweiligen Zustand abtasten. Üblicherweise wird bei den Rot-Lampen der durch die Lampe fließende Strom und bei den Gelb- und Grün-Lampen der an der Lampe anliegende Spannungspegel abgetastet.A device for signal protection comprises a number of transducers which are assigned to the individual lamps of the traffic light system and which sense their respective status. Usually the current flowing through the lamp is scanned for the red lamps and the voltage level applied to the lamp is scanned for the yellow and green lamps.

Bei herkömmlichen Signalsicherungs-Vorrichtungen sind die Meßwertgeber an eine verdrahtete Logik angeschlossen, die bei Auftreten eines Fehlers ein Fehlersignal an die Steuerung der Lichtzeichenanlage liefert. Die Verdrahtung dieser Logik ist jeweils den besonderen Gegebenheiten der betreffenden Lichtzeichenanlage angepaßt. Dies hat den Nachteil, daß bei der Installation einer neuen Lichtzeichenanlage oder bei der Erweiterung oder Änderung einer bestehenden Anlage die Logik jeweils neu verdrahtet werden muß.In conventional signal protection devices, the transducers are connected to a wired logic which, in the event of an error, supplies an error signal to the control of the traffic light system. The wiring this logic is adapted to the particular circumstances of the traffic light system in question. This has the disadvantage that the logic must be re-wired each time a new traffic light system is installed or an existing system is expanded or changed.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zur Signalsicherung zu schaffen, bei der die Verdrahtung der Logik unabhängig von der jeweiligen Art der Lichtzeichenanlage ist.The invention has for its object to provide a device for signal protection, in which the wiring of the logic is independent of the particular type of light signal system.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Logik ein-Mikroprozessor ist, der über einen Adressenbus und einen Datenbus mit den Meßwertgebern in Verbindung steht. Die Meßdaten der Meßwertgeber werden von dem Mikroprozessor seriell abgefragt und über den gemeinsamen Datenbus übermittelt. Da der Meßwertgeber die Meßdaten periodisch in rascher Folge abfragt und verarbeitet, erfolgt eine quasi-kontinuierliche Überwachung der Meßdaten, so daß ein eventuell auftretender Fehler sofort erkannt werden kann. Die Verdrahtung des Daten-Busses und des Adressen-Buses ist für alle Arten von Lichtzeichenanlagen gleich,und die Anpassung an die jeweiligen Besonderheiten der Lichtzeichenanlage erfolgt über die Anwender-Programmierung des Mikroprozessors.This object is achieved according to the invention in that the logic is a microprocessor which is connected to the sensors via an address bus and a data bus. The measurement data of the sensors are queried serially by the microprocessor and transmitted via the common data bus. Since the transmitter periodically polls and processes the measurement data in rapid succession, the measurement data is monitored quasi-continuously so that a possible error can be recognized immediately. The wiring of the data bus and the address bus is the same for all types of traffic light systems, and the adaptation to the particular characteristics of the traffic light system is carried out via the user programming of the microprocessor.

Bevorzugt ist den Lampenschaltern eines jeden Signalgebers ein bestimmter Steckplatz auf einer die Signalsicherungs-Logik aufnehmenden Platine zugeordnet, und jedem Steckplatz ist eine bestimmte Adresse zugeordnet, so daß der Mikroprozessor das Signalbild jedes einzelnen Signalgebers durch Aufruf der entsprechenden Adresse abfragen kann.The lamp switches of each signal transmitter are preferably assigned a specific slot on a circuit board which accommodates the signal protection logic, and each slot is assigned a specific address, so that the microprocessor can query the signal image of each individual signal transmitter by calling up the corresponding address.

Im folgenden wird ein bevorzugtes Ausführungsbeispiel der Erfindung anhand der Zeichnung näher erläutert.A preferred exemplary embodiment of the invention is explained in more detail below with reference to the drawing.

Die einzige Figur zeigt ein Blockschaltbild einer erfindungsgemäßen Vorrichtung zur Signalsicherung.The single figure shows a block diagram of a device for signal protection according to the invention.

Ein Mikroprozessor 10 ist über einen Datenbus 12 und einen Adressenbus 14 mit einer Anzahl von Signalgeber-Steuereinheiten 16 verbunden. Jede der Steuereinheiten 16 umfaßt einen durch eine nicht gezeigte Steuerung gesteuerten Lampen-Schalter, der die Rot-, Gelb- und Grün-Lampen 18 des betreffenden Signalgebers schaltet, und Meßwertgeber, die den jeweiligen Zustand der Lampen 18 abtasten. Die Spannungsversorgung für die Rot- und Grün-Lampen erfolgt über Leitungen 20,22 und die Spannungsversorgung für die Gelb-Lampen über eine Leitung 24 und die Leitung 22. In der Leitung 20 für die Rot- und Grün-Lampen ist ein Relais 26 vorgesehen, das durch einen Ausgang des Mikroprozessors 10 gesteuert wird.A microprocessor 10 is connected to a number of signal generator control units 16 via a data bus 12 and an address bus 14. Each of the control units 16 comprises a lamp switch, which is controlled by a controller (not shown) and which switches the red, yellow and green lamps 18 of the relevant signal transmitter, and sensors which sense the respective state of the lamps 18. The voltage supply for the red and green lamps takes place via lines 20, 22 and the voltage supply for the yellow lamps via line 24 and line 22. A relay 26 is provided in line 20 for the red and green lamps which is controlled by an output of the microprocessor 10.

Ein weiterer Ausgang des Mikroprozessors 10 ist mit einer Fehler-Anzeige 28 verbunden.Another output of the microprocessor 10 is connected to an error display 28.

Jeder der Steuereinheiten 16 ist dadurch, daß sie auf einem bestimmten Steckplatz einer Platine gesteckt wird, die Adresse dieses Steckplatzes (Steckplatzadresse) zugewiesen.Each of the control units 16 is assigned the address of this slot (slot address) by being plugged into a specific slot on a circuit board.

Der Mikroprozessor 10 umfaßt eine Zentraleinheit, einen elektrisch programmierbaren Festwertspeicher (EPROM) und einen Speicher mit wahlfreiem Zugriff (RAM). In dem Festwertspeicher sind ein Grundprogramm und die jeweiligen Anwenderdaten gespeichert. Der RAM-Speicher dient zur Speicherung von bei der Datenverarbeitung in der Zentraleinheit anfallenden Zwischenergebnissen.The microprocessor 10 includes a central processing unit, an electrically programmable read-only memory (EPROM) and a random access memory (RAM). A basic program and the respective user data are stored in the read-only memory. The RAM memory is used to store intermediate results obtained during data processing in the central processing unit.

Wenn der Mikroprozessor 10 durch ein Signal der Steuerung der Lichtzeichenanlage aktiviert wird, so ruft er nacheinander die Meßdaten von den Meßwertgebern der einzelnen Steuereinheiten 16 ab und überprüft entsprechend dem Anwenderprogramm, ob ein Lampen- oder Verriegelungsfehler vorliegt. Die Werte einer bestimmten Steuereinheit werden abgetastet, indem deren Adresse über den Adressenbus aufgerufen wird. Die Steuereinheit meldet daraufhin zunächst ihre Adresse über den Datenbus an den Mikroprozessor zurück. Auf diese Weise kann abgetastet werden, ob der aufgerufene Steckplatz auch tatsächlich belegt ist. Unterbleibt die Rückmeldung, so erzeugt der Mikroprozessor ein Fehlersignal.When the microprocessor 10 is activated by a signal from the control of the traffic light system, it successively calls up the measurement data from the sensors of the individual control units 16 and checks according to the user program whether there is a lamp or locking error. The values of a specific control unit are sampled by calling up their address via the address bus. The control unit then first reports its address back to the microprocessor via the data bus. In this way it can be scanned whether the slot accessed is actually occupied. If there is no feedback, the microprocessor generates an error signal.

Nach der Rückmeldung der Adresse werden die Meßdaten der Meßwertgeber der aufgerufenen Steuereinheit über den Datenbus an den Mikroprozessor übermittelt. Jede Steuereinheit weist eine Selektierungslogik auf, die anhand eines von dem Mikroprozessor erzeugten binären Signals entscheidet, ob die Steckplatzadresse oder die Meßdaten über den Datenbus übermittelt werden.After the address has been reported back, the measurement data of the transducers of the called control unit are transmitted to the microprocessor via the data bus. Each control unit has a selection logic, which uses a binary signal generated by the microprocessor to decide whether the slot address or the measurement data are transmitted via the data bus.

Stellt der Mikroprozessor nach dem Aufruf sämtlicher Steuereinheiten 16 keinen Fehler fest, so beginnt der Abfragezyklus von neuem. Solange kein Fehler festgestellt wird, erzeugt der Mikroprozessor 10 an seinem mit dem Relais 26 verbundenen Ausgang ein Rechtecksignal mit einer Frequenz von 100 Hz. Stellt der Mikroprozessor 10 einen Fehler fest, so wird das 100 Hz-Signal unterbrochen.If the microprocessor does not find any error after calling up all of the control units 16, the polling cycle begins again. As long as no error is detected, the microprocessor 10 generates a square-wave signal with a frequency of 100 Hz at its output connected to the relay 26. If the microprocessor 10 detects an error, the 100 Hz signal is interrupted.

Eine nicht gezeigte Auswerteschaltung, die beispielsweise. ein Monoflop, Siebkondensatoren und einen Gleichrichter umfaßt, hält das Relais 26 geschlossen, solange das 100 Hz-Signal vorliegt. Bleibt das Signal aus oder weicht die Frequenz um einen bestimmten Betrag nach oben oder unten von dem Wert 100 Hz ab, so fällt das Relais 26 ab, und sämtliche Rot- und Grün-Lampen werden abgeschaltet.An evaluation circuit, not shown, for example. comprising a monoflop, filter capacitors and a rectifier, keeps relay 26 closed as long as the 100 Hz signal is present. Does the signal fail or give way to the Frequency up or down by a certain amount from the value 100 Hz, the relay 26 drops, and all red and green lamps are switched off.

Die Verwendung eines Signals mit einer vorgegebenen Frequenz (100 Hz) als Fehlersignal hat gegenüber der Verwendung eines logischen Signals den Vorteil, daß die Fehlermeldung auch dann zuverlässig erfolgt, wenn beispielsweise infolge eines Kurzschlusses der Ausgang des Mikroprozessors ständig auf logisch H oder L gehalten wird. Von den Lampenschaltern werden ebenfalls nur Wechselspannungen übertragen. Wenn keine Wechselspannung an den Lampenschalter anliegt, wird das Relais 26 ebenfalls abgeschaltet.The use of a signal with a predetermined frequency (100 Hz) as an error signal has the advantage over the use of a logic signal that the error message is also reliable if, for example, the output of the microprocessor is kept at logic H or L due to a short circuit. Only AC voltages are also transmitted from the lamp switches. If there is no AC voltage at the lamp switch, the relay 26 is also switched off.

Wenn der Mikroprozessor 10 einen Fehler erkennt, so wird zusätzlich zu dem Signal an das Relais 26 ein Signal an die Fehler-Anzeige 28 geliefert, das dem Überwachungspersonal anzeigt, um welche Art von Störung es sich handelt. Gleichzeitig wird ein Signal an die Steuerung der Lichtzeichenanlage geliefert, die daraufhin über die Leitung 24 die Gelb-Lampen derart steuert, daß an den nicht vorfahrtberechtigten Straßen ein gelbes Warnblinklicht erzeugt wird.If the microprocessor 10 detects an error, in addition to the signal to the relay 26, a signal is sent to the error display 28, which indicates to the monitoring personnel what type of error it is. At the same time, a signal is supplied to the control of the traffic light system, which then controls the yellow lamps via line 24 in such a way that a yellow flashing warning light is generated on the streets that are not authorized to drive up.

Claims (5)

1. Vorrichtung zur Signalsicherung bei Lichtzeichenanlagen, mit den Lampen der einzelnen Signalgeber zugeordneten Meßwertgebern und einer die Meßsignale der Meßwertgeber aufnehmenden Logik zum sofortigen Abschalten der Lichtzeichenanlage bei Auftreten eines Fehlers, dadurch gekennzeichnet, daß die Logik ein Mikroprozessor (10) ist, der über einen Adressenbus (14) und einen Datenbus (12) mit den Meßwertgebern in Verbindung steht.1. Device for securing signals in traffic light systems, with the lamps of the individual signal transmitters assigned to the measurement signals of the transducers and receiving logic for immediately switching off the traffic light system in the event of an error, characterized in that the logic is a microprocessor (10) which has a Address bus (14) and a data bus (12) is connected to the sensors. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß jeweils dan Meßwertgebern eines Signalgebers ein bestimmter Steckplatz mit einer bestimmten, durch den Mikroprozessor (10) aufrufbaren Steckplatzadresse zugeordnet ist.2. Device according to claim 1, characterized in that dan sensors of a signal transmitter are assigned a specific slot with a specific slot address which can be called by the microprocessor (10). 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß jedem Signalgeber eine Selektierungslogik zugeordnet ist, die entsprechend dem Zustand eines binären Signals des Mikroprozessors entweder die betreffende Steckplatzadresse oder die Meßsignale der Meßwertgeber an den Datenbus (12) übermittelt.3. Apparatus according to claim 2, characterized in that a selection logic is assigned to each signal transmitter, which transmits either the relevant slot address or the measurement signals of the transmitter to the data bus (12) according to the state of a binary signal of the microprocessor. 4. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Mikroprozessor bei fehlerfreiem Betrieb der Lichtzeichenanlage ein Impulssignal mit einer vorgegebenen Frequenz an ein Relais (26) liefert und daß das Relais (26) die Rot- und Grün-Lampen der Lichtzeichenanlage abschaltet, wenn die Frequenz des Mikroprozessor-Signals von dem vorgegebenen Wert abweicht.4. Device according to one of the preceding claims, characterized in that the microprocessor delivers a pulse signal at a predetermined frequency to a relay (26) when the light signal system is operating correctly and that the relay (26) switches off the red and green lamps of the light signal system when the frequency of the microprocessor signal deviates from the specified value. 5. Vorrichtung nach einem der vorhergehenden Ansprüche, gekennzeichnet durch eine mit einem Ausgang des Mikroprozessors verbundene Fehler-Anzeige (28) zur Anzeige der Art des aufgetretenen Fehlers.5. Device according to one of the preceding claims, characterized by an error display (28) connected to an output of the microprocessor for displaying the type of error that has occurred.
EP84109815A 1983-10-17 1984-08-17 Device for signal safety in light sign arrangements Withdrawn EP0137964A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833337700 DE3337700A1 (en) 1983-10-17 1983-10-17 DEVICE FOR SIGNAL SAFETY IN LIGHT SIGNALING SYSTEMS
DE3337700 1983-10-17

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EP0137964A2 true EP0137964A2 (en) 1985-04-24
EP0137964A3 EP0137964A3 (en) 1987-09-23

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EP84109815A Withdrawn EP0137964A3 (en) 1983-10-17 1984-08-17 Device for signal safety in light sign arrangements

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0330164A2 (en) * 1988-02-25 1989-08-30 Siemens Aktiengesellschaft Partial traffic-signalling system disconnecting device
FR2647932A1 (en) * 1989-06-02 1990-12-07 Forclum Force Lumiere Elect Device for remote monitoring of crossroad traffic lights and method for putting such a device into service
EP0942401A2 (en) * 1998-03-13 1999-09-15 Siemens Aktiengesellschaft Method and device for signalling security in traffic light control systems
CN108417073A (en) * 2018-05-18 2018-08-17 上海会为智能技术有限公司 A kind of signal lamp running-state displaying method, device, equipment and medium

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3541549A1 (en) * 1985-11-25 1987-05-27 Stuehrenberg Rolf Method and device for protecting signals in traffic lights

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0007579A1 (en) * 1978-08-01 1980-02-06 Siemens Aktiengesellschaft Circuit arrangement for monitoring the state of signalling systems, especially traffic light signalling systems
EP0031046A2 (en) * 1979-12-21 1981-07-01 Siemens Aktiengesellschaft Device for data secure control and supervision of electric equipments
DE3206345A1 (en) * 1982-02-22 1983-09-01 Siemens AG, 1000 Berlin und 8000 München Light signal installation, in particular traffic signal installation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0007579A1 (en) * 1978-08-01 1980-02-06 Siemens Aktiengesellschaft Circuit arrangement for monitoring the state of signalling systems, especially traffic light signalling systems
EP0031046A2 (en) * 1979-12-21 1981-07-01 Siemens Aktiengesellschaft Device for data secure control and supervision of electric equipments
DE3206345A1 (en) * 1982-02-22 1983-09-01 Siemens AG, 1000 Berlin und 8000 München Light signal installation, in particular traffic signal installation

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0330164A2 (en) * 1988-02-25 1989-08-30 Siemens Aktiengesellschaft Partial traffic-signalling system disconnecting device
EP0330164A3 (en) * 1988-02-25 1991-09-25 Siemens Aktiengesellschaft Partial traffic-signalling system disconnecting device
FR2647932A1 (en) * 1989-06-02 1990-12-07 Forclum Force Lumiere Elect Device for remote monitoring of crossroad traffic lights and method for putting such a device into service
EP0942401A2 (en) * 1998-03-13 1999-09-15 Siemens Aktiengesellschaft Method and device for signalling security in traffic light control systems
EP0942401A3 (en) * 1998-03-13 2000-08-30 Siemens Aktiengesellschaft Method and device for signalling security in traffic light control systems
CN108417073A (en) * 2018-05-18 2018-08-17 上海会为智能技术有限公司 A kind of signal lamp running-state displaying method, device, equipment and medium

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DE3337700A1 (en) 1985-05-02
EP0137964A3 (en) 1987-09-23

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