EP0172454B1 - Überwachungseinrichtung für Verkehrssignalanlagen - Google Patents

Überwachungseinrichtung für Verkehrssignalanlagen Download PDF

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Publication number
EP0172454B1
EP0172454B1 EP85109517A EP85109517A EP0172454B1 EP 0172454 B1 EP0172454 B1 EP 0172454B1 EP 85109517 A EP85109517 A EP 85109517A EP 85109517 A EP85109517 A EP 85109517A EP 0172454 B1 EP0172454 B1 EP 0172454B1
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EP
European Patent Office
Prior art keywords
lamp
signal
monitoring device
circuits
sensor
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
Application number
EP85109517A
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German (de)
English (en)
French (fr)
Other versions
EP0172454A1 (de
Inventor
Peter Wenter
Peter Dipl.-Ing. Drebinger (Fh)
Erich Eder
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.)
Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT85109517T priority Critical patent/ATE41540T1/de
Publication of EP0172454A1 publication Critical patent/EP0172454A1/de
Application granted granted Critical
Publication of EP0172454B1 publication Critical patent/EP0172454B1/de
Expired legal-status Critical Current

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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
    • 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
    • H05B47/21—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in parallel

Definitions

  • the invention relates to a monitoring device for a light signal system, in particular a traffic signal system, with signal lamps connected to an operating AC voltage via lamp switches, in which sensor circuits are provided for obtaining lamp circuit status signals assigned to the individual lamp circuits, at least some of the sensor circuits having opto-couplers.
  • sensor circuits are provided for obtaining lamp circuit status signals assigned to the individual lamp circuits, at least some of the sensor circuits having opto-couplers.
  • whose electro-optical converter is inserted between a tap of a reference alternating voltage which is phase-synchronized with the operating alternating voltage and a tap provided between a lamp switch and a signal lamp, and whose associated opto-electrical converters are sensor output signal sources.
  • Such a monitoring device is known from DE-OS 31 07 090.
  • electrical quantities (current, voltage) tapped by the individual lamp circuits are integrated over the duration of a half-wave with alternating integration direction and pulses are obtained from the integration results, which only signal the actual status of the signal system via a logic link when target states are reached.
  • a monitoring device it is possible to reliably identify malfunctions in the switching behavior of the lamp switches, particularly when semiconductor switches are used as lamp switches, and thereby reliably detect a faulty switching mode of such switches, but the logical combination of the sensor circuit output signals must be tailored to the respective traffic signal system.
  • GB-A-2 011 692 a circuit arrangement for detecting undesired signal combinations of two signal lamps in traffic lights is known.
  • the sensor circuit there has an optocoupler whose electro-optical converter is inserted between a tap of a reference alternating voltage which is phase-synchronized with the operating voltage and a tap provided between a lamp switch and a signal lamp, the opto-electrical converters of the optocouplers being sensor output signal sources.
  • this circuit arrangement only the voltages of every second (e.g. positive) half-wave are monitored. Additional sensor circuits for the red lamps, different reference alternating voltages and monitoring and evaluation devices using microprocessors are not provided there.
  • signal state signals that is to say signals derived from the individual signal transmitters or signal lamp circuits, which provide information about the state of the respective lamp circuit with the aid of two microprocessors and in particular to compare the actual signal status signals with the desired signal statuses recorded in the microprocessor's memories, whereby faulty signal statuses and thus faulty signaling of the traffic signal system can be reliably determined without special wiring being required for the respective use case of the monitoring device. Rather, it is sufficient to provide the microprocessors used with a monitoring program tailored to the respective traffic signal system. The microprocessors also monitor each other, which significantly increases security.
  • the object of the present invention is to develop a monitoring device of the type mentioned at the outset such that, in particular, the sensor circuits provide sensor output signals which are suitable for evaluation by microprocessors, and in a further embodiment of the invention the self-monitoring of the monitoring device is further improved.
  • each tap lying between a lamp switch and a signal lamp is assigned two antiparallel LEDs as electro-optical converters, that each of these electro-optical converters works together with its own opto-electrical converter, and because two different reference alternating voltages are provided with an upper, a red lamp circuit and a lower, alternating reference voltage assigned to a green and / or yellow lamp circuit, sensor circuits also being provided for these reference alternating voltages.
  • pulse-shaped sensor output signals are generated which extend over a certain range of each half-wave. B. can be determined by sampling the pulse-shaped sensor output signal.
  • the sensor output signal is also forcibly synchronized to the respective phase position of the operating AC voltage, so that it is advantageously possible to determine sampling times for this signal with respect to the zero crossings of the operating AC voltage.
  • each tap lying between a lamp switch and a signal lamp is assigned two LEDs connected in anti-parallel as electro-optical converters, who each work with their own opto-electrical converter.
  • the oppositely polarized half-waves of the AC operating voltage are monitored in a particularly simple manner.
  • at least two different reference alternating voltages are used, with an upper, a red lamp circuit and a lower, alternating reference voltage assigned to a green and / or yellow lamp circuit, sensor circuits also being provided for these reference alternating voltages.
  • the operating AC voltage when the lamp circuit is closed does not fall below a minimum value of, for. B. can drop 0.73 times the target value without the sensor output signal changing its phase position by 180 °, thus contradicting the target state, while with green or yellow signal lamps in the interrupted state of the respective lamp circuit, one which is still attached to the lamp Share of the operating AC voltage z.
  • the reference AC voltages are also monitored in this way, which further increases the intrinsic safety of the monitoring device.
  • At least some further sensor circuits are provided, each with a current transformer with a Z-shaped magnetization characteristic inserted into a lamp circuit.
  • additional sensor output signals are derived from red lamp circuits if a minimum current level is present in the red lamp circuit.
  • each current transformer has two electronic switches associated with each half-wave connected as sensor output signal circuits.
  • Each half-wave of the lamp current thus generates its own sensor output signal.
  • the output signal circuits of the sensor circuits are combined in groups between an enable signal line assigned to the respective sensor group and a bus line provided jointly for a plurality of sensor output signal circuits of different sensor groups.
  • each sensor group has its own enable signal line and when this group of sensors is queried, the operational state of the respective enable signal line can be derived from the query result.
  • transistors used as electronic switches with their collectors connected to an associated enable signal line and with their emitters via diodes polarized opposite to the emitter base diode of the respective transistor, each on a bus line are connected and that a zener diode is connected between the assigned enable signal line and a connecting line provided between one end of the secondary winding of the current transformer and a base electrode of the transistors.
  • the enable signal line is advantageously used as a circuit basis for the current transformer sensor circuits and the special switching on of the transistors within these sensor circuits means that the transistors work inversely.
  • the current amplification of the transistors is low, and the risk of a high-impedance coupling of signals into the base circuit of the transistors, which can cause faulty sensor output signals, is almost eliminated.
  • the diodes provided in the output of the transistors prevent a positive potential present on the enable signal line for blocking the relevant sensor group from passing through to the output of the transistors.
  • each enable is provided by the microprocessor providing the enable signal Signal cycle is limited to a fraction of a half-wave of the operating alternating voltage and is generated only once during each half-wave with a start shifted from half-wave to half-wave in time, and that the two microprocessors each deliver a clock pulse sequence with the same frequency and with the other clock pulse sequence phase position shifted relative to one another by 180 degrees is formed only in the case of actual states of the bus line signals corresponding to desired states.
  • a signal transmitter of the traffic signal system by means of which the flow of traffic is to be influenced in a traffic direction, has a green signal lamp 1, a yellow signal lamp 2, and two red signal lamps 3, 4 connected in parallel with one another.
  • the two red signal lamps 3, 4, the yellow signal lamp 2 and the green signal lamp 1 are each connected via a lamp switch 5 to a phase conductor 6 of an operating AC voltage and on the other side to the neutral conductor 7 of the operating AC voltage.
  • sensor circuits are connected to the circuits of the signal lamps 1, 2, 3, 4, with the aid of which signal state signals can be obtained.
  • Two types of sensor circuits are provided, namely voltage sensor circuits and current sensor circuits.
  • a tap 8 is provided between each lamp switch 5 and the associated signal lamps, to which two light-emitting diodes 10 connected in anti-parallel are connected via a protective resistor 9.
  • the light-emitting diodes 10 are on the side facing away from the protective resistor 9 at the taps 11 of reference AC voltages which are phase-synchronous with the operating AC voltage, the peak value of which, for. B. may be between 0.27 to 0.73 times the peak value of the operating AC voltage.
  • the light-emitting diodes 10 are the electro-optical converters of optocouplers whose opto-electrical converters 12 are connected to a line 13 in parallel with one another as electronic switches.
  • the electronic switches 12 are each individually connected to a line 14, so that a signal present on the line 13 can be transmitted to one of the lines 14 by means of one of the electronic switches 12.
  • the light emitting diodes 10 are acted upon by the reference alternating voltage when the lamp switches 5 are blocked, that is to say interrupted lamp circuits, which alternately generates a current proportional to the alternating voltage in the two diodes 10 during each half-wave.
  • the resistor 9 is limited so that it can flow through a signal lamp 1, 2, 3, 4 without being able to pretend signaling via this signal lamp.
  • the operating alternating voltage is essentially completely at the corresponding signal lamp 1, 2, 3, 4, so that now the current flowing through the diodes 10 is determined by a differential alternating voltage, which is derived from the difference between the alternating operating voltage and that at the taps 11 lying reference AC voltage results.
  • the direction of current in the individual light-emitting diodes 10 is in each case opposite to that when the light-emitting diodes 10 are driven only by the reference AC voltage.
  • the light-emitting diodes 10 themselves send an optical signal to their individually assigned electronic switch 12. For the duration of the optical signal which is emitted by a light-emitting diode 10, the respectively associated electronic switch 12 is closed and thus a connection between the line 13 and one of the lines 14 is produced.
  • a transistor 17 is connected to the winding ends of the secondary side of the current transformers 15 via a series resistor 18 with its base electrode. With their collector electrodes, the transistors 17 are on the line 13, which is each connected via a Zener diode 19 to one of the winding ends of the secondary side of the current transformer 15.
  • Each of the transistors 17 is connected to a line 14 via an additional diode 20 which is opposite to the emitter base diode of the transistors 17, this line 14 connecting the respective sensor output signal circuit through one of the switches 12 and one of the transistors 17 in cooperation with one of the Diodes 20 is formed, is individually assigned.
  • phase position, approximate duration and the shape of the sensor circuit output signals as represented by the switching state of the electronic switches 12 and the transistors 17, can be seen in FIG. 2 with regard to the respective phase state of the operating AC voltage.
  • the top line of the diagram in FIG. 2 shows the course of the operating AC voltage.
  • the following eight lines show the switching states of the electronic switches 12 and the transistors 17 (of the transistors 17, only the switching state of one of the two transistor pairs is shown, since the switching states of the two transistor pairs are the same) when the switch 5 assigned to the red signal lamps 3, 4 is closed and those of the green signal lamp 1 and the lamp switch 5 assigned to the yellow signal lamp 2 are open, that is to say the latter two signal lamps are switched off.
  • the line pairs 2, 3 and 4, 5 show an opposite phase course to that of the line pair 6, 7. This is due to the fact that the line pairs 2, 3 and 4, 5 show the switching states of the four electronic switches which are assigned to the green signal lamp and the yellow signal lamp, while the line pair 6, 7 shows the switching states of the two electronic switches 12 which are associated with the light-emitting diodes 10 are connected, which are assigned to the red signal lamps.
  • the light emitting diodes 10 of the green signal lamp 1 and the yellow signal lamp 2 are controlled by the reference alternating voltage
  • the light emitting diodes 10 of the red signal lamps 3, 4 are controlled by the differential alternating voltage, which acts on the diodes 10 in phase opposition to the reference alternating voltage
  • the phase change of the switching states of the electronic switches 12 results , which are assigned to the two red signal lamps 3, 4, for the switching states of the electronic switches 12 which belong to the green signal lamp 1 and the yellow signal lamp 2.
  • the diagram lines 8, 9 in FIG. 2 show the switching states of the transistors 17.
  • FIG. 3 shows that a first microprocessor 22 can influence enable signal lines 13, which as shown in FIG. 1, lead to a grouped arrangement of sensor output signal circuits via an output port 23.
  • the first microprocessor 22 is designed such that an enable signal is applied to the enable signal lines 13 cyclically. This enable signal therefore reaches the electronic switches 12 or the transistors 17 of a sensor group 21. Electronic switches 12 or transistors 17 which are in a low-resistance state switch the enable signal from the line 13 to one of the lines 14 in each case are combined into a bus.
  • the enable signals on the lines 13 also pass through an input port 24 to a second microprocessor 25 which is designed such that it likewise receives the bus signals in parallel with the first microprocessor 22.
  • Program and data memory 26 are also assigned to the two microprocessors 22, 25.
  • a display device 27 is coupled to the second microprocessor 25, which displays the type and location of the fault in the event of a fault.
  • an enable signal cycle is limited to a fraction of a half-wave of the operating AC voltage. B. the duration of about 3.5 ms. From half-wave to half-wave, however, this enable signal cycle is e.g. B. shifted by 1 ms, so that at a 50 Hz operating AC voltage after ten half-waves, which correspond to a period of 100 ms, the enable signal cycle starts again with the zero crossing of a half-wave of the operating AC voltage.
  • This scanning determines the complete absence, faulty occurrence, interruption or shortening of a status signal of one of the electronic switches 12 and one of the transistors 17 and the faulty operation of the signaling system and / or the monitoring device is determined by an actual / target comparison.
  • the two microprocessors 22, 25 each emit a clock pulse sequence with the same frequency as the other clock pulse sequence but with a phase position shifted by 180 degrees relative to one another. Only if a logical combination of these two clock pulse sequences by means of a fail-safe evaluation circuit 28 determines their presence and correct phase position, is this evaluated as the actual state of the signal system which corresponds to the target state.
  • the phase position of the two clock pulse sequences shifted by 180 degrees ensures that the clock pulse sequence emitted by the one microprocessor cannot simulate a clock pulse sequence emitted by the other microprocessor as a result of undesired coupling.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Traffic Control Systems (AREA)
  • Alarm Systems (AREA)
EP85109517A 1984-08-01 1985-07-29 Überwachungseinrichtung für Verkehrssignalanlagen Expired EP0172454B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85109517T ATE41540T1 (de) 1984-08-01 1985-07-29 Ueberwachungseinrichtung fuer verkehrssignalanlagen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3428444 1984-08-01
DE19843428444 DE3428444A1 (de) 1984-08-01 1984-08-01 Ueberwachungseinrichtung fuer verkehrssignalanlagen

Publications (2)

Publication Number Publication Date
EP0172454A1 EP0172454A1 (de) 1986-02-26
EP0172454B1 true EP0172454B1 (de) 1989-03-15

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ID=6242156

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85109517A Expired EP0172454B1 (de) 1984-08-01 1985-07-29 Überwachungseinrichtung für Verkehrssignalanlagen

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EP (1) EP0172454B1 (enrdf_load_stackoverflow)
AT (1) ATE41540T1 (enrdf_load_stackoverflow)
DE (1) DE3428444A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
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

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0214692B1 (en) * 1985-09-05 1991-12-04 Koninklijke Philips Electronics N.V. Monitoring a conflict detector for traffic-lights
DE3541549A1 (de) * 1985-11-25 1987-05-27 Stuehrenberg Rolf Verfahren und vorrichtung zur signalsicherung in lichtzeichenanlagen
ATE66082T1 (de) * 1986-06-25 1991-08-15 Siemens Ag Ueberwachungseinrichtung fuer signallampen einer strassenverkehrssignalanlage.
DE3805949A1 (de) * 1988-02-25 1989-09-07 Siemens Ag Einrichtung zur teilabschaltung einer strassenverkehrssignalanlage
DE3910864C1 (enrdf_load_stackoverflow) * 1989-04-04 1990-05-23 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
FR2653922B1 (fr) * 1989-11-02 1992-02-14 Sfim Systeme de surveillance de feu de signalisation.
BE1004100A3 (nl) * 1990-12-04 1992-09-22 Vertongen Patricia Francois Kontroleschakeling voor door een besturingsinrichting bestuurde signalisatielichten.
US5387909A (en) * 1993-03-25 1995-02-07 Naztec, Inc. Lamp sensing system for traffic lights
EP0935145A1 (de) * 1998-02-04 1999-08-11 IMS Industrial Micro System AG Optische Signal- und Anzeigevorrichtung
WO2002074017A1 (en) * 2001-03-10 2002-09-19 Siemens Plc Electrical apparatus and method

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
DE1194295B (de) * 1962-05-21 1965-06-03 Franz Baumgartner Fabrik Elek Lichtelektrisches Kontrollsystem fuer Signallampen in Verkehrssignalanlagen
DE1303440B (enrdf_load_stackoverflow) * 1964-11-21 1971-12-02 Franz Baumgartner Fabrik Elektrischer Apparate
NL178634C (nl) * 1978-01-02 1986-04-16 Philips Nv Inrichting voor het detecteren van ongewenste signaalcombinaties van twee signaallampen bij verkeerslichten.
DE2833761C3 (de) * 1978-08-01 1981-12-03 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zur Überwachung des Zustands von Signalanlagen, insbesondere von Straßenverkehrs-Lichtsignalanlagen
DE3025679A1 (de) * 1980-07-07 1982-01-28 Siemens AG, 1000 Berlin und 8000 München Ueberwachungseinrichtung fuer mit wechselstrom gespeiste verbraucher
DE3107090A1 (de) * 1981-02-25 1982-09-09 Siemens AG, 1000 Berlin und 8000 München Verfahren und schaltungsanordnung zur ueberwachung wechselstromgespeister verkehrssignalanlagen

Cited By (1)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
DE3428444A1 (de) 1986-02-06
EP0172454A1 (de) 1986-02-26
ATE41540T1 (de) 1989-04-15
DE3428444C2 (enrdf_load_stackoverflow) 1988-10-27

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