EP0432625B1 - Commutateur filament principal-secours pour lampes à double filament alimentées en courant alternatif dans des installations de signalisation du trafic - Google Patents

Commutateur filament principal-secours pour lampes à double filament alimentées en courant alternatif dans des installations de signalisation du trafic Download PDF

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Publication number
EP0432625B1
EP0432625B1 EP90123331A EP90123331A EP0432625B1 EP 0432625 B1 EP0432625 B1 EP 0432625B1 EP 90123331 A EP90123331 A EP 90123331A EP 90123331 A EP90123331 A EP 90123331A EP 0432625 B1 EP0432625 B1 EP 0432625B1
Authority
EP
European Patent Office
Prior art keywords
main
filament
switch
optical coupler
changeover switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90123331A
Other languages
German (de)
English (en)
Other versions
EP0432625A1 (fr
Inventor
Hellmuth Fricke
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
Original Assignee
Siemens AG
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.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT90123331T priority Critical patent/ATE102780T1/de
Publication of EP0432625A1 publication Critical patent/EP0432625A1/fr
Application granted granted Critical
Publication of EP0432625B1 publication Critical patent/EP0432625B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B61L5/1881—Wiring diagrams for power supply, control or testing
    • 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
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • H05B39/10—Circuits providing for substitution of the light source in case of its failure

Definitions

  • the invention relates to a main / secondary thread switch according to the preamble of claim 1.
  • Double-filament lamps are used almost exclusively to illuminate the signal lamps in railway light signals.
  • One of these lamp threads is the so-called main thread, via which the illumination usually takes place, and the other is the so-called secondary thread, which is automatically switched on when the main thread burns out and then takes over the task of the burnt-out main thread.
  • main / secondary thread switches are used, which detect the current flowing through the main thread and in the de-energized state, i.e. if the main thread fails, activate the respective secondary thread.
  • the main / secondary thread monitors are usually designed as relays and arranged in the vicinity of the signal lamps to be monitored (DE-PS 35 16 612).
  • the object of the invention is to provide a main / secondary thread switch according to the preamble of claim 1, which manages with as few inexpensive electronic components that have been tried and tested in practice and is therefore extremely reliable.
  • the drawing shows a signal lamp L designed as a double thread lamp with a main thread HF and a secondary thread NF, as is used for railway light signals.
  • the signal lamp is fed via lines drawn thick in the drawing from a lamp transformer T1 arranged, for example, in the vicinity of the signal lamp, which is to be connected to voltage as required via cables from the remote signal box and thereby supplies the lamp with lamp current.
  • a lamp transformer T1 arranged, for example, in the vicinity of the signal lamp, which is to be connected to voltage as required via cables from the remote signal box and thereby supplies the lamp with lamp current.
  • With the main thread in series is the primary winding of a current transformer T2, to whose secondary winding the anti-parallel transmission diodes of an optocoupler U1 are connected via a current limiting resistor.
  • the optocoupler U1 can also be parallel to a load connected to the main thread circuit.
  • the transmission diodes of the optocoupler U1 have current flowing through them and control an assigned switching transistor into the low-resistance switching state.
  • This switching transistor is connected to a DC voltage that can be tapped at the output of a rectifier circuit G, which in the exemplary embodiment is derived from the AC voltage that can be tapped on the secondary side at the lamp transformer T1.
  • the switching transistor of the optocoupler U1 controls an electronic switch S1 connected downstream, for example a field effect transistor, to the conducting state in which it short-circuits the transmission diode of an optoelectronically controllable AC switch U2; the electronic Switch S1 and the transmitter diode of the electronic alternating current switch U2 are also connected to the voltage that can be tapped at the rectifier G.
  • an electronic switch S1 connected downstream, for example a field effect transistor
  • the electronic alternating current switch U2 is used to switch an electronic alternating current switch TR, preferably a triac, arranged in the circuit of the secondary thread NF, with low or high resistance, depending on the operating state of the main thread.
  • the receiving diodes of the electronic alternating current switch U2 obtain their supply voltage via the secondary thread NF from the lamp transformer T1 feeding the lamp. The current flowing through them is set so low by series resistors that the secondary thread does not yet light up when the transmitting diode of the AC switch U2 is without current.
  • the switch S1 has short-circuited the transmission diode of the AC switch U2.
  • the potential present at the control input of the AC switch TR is not able to switch the AC switch to low resistance and the auxiliary thread of the signal lamp L remains dark.
  • the switching transistor of the optocoupler U1 becomes high-resistance and thereby switches the electronic switch S1 to the non-conductive state.
  • the transmission diode of the electronic AC switch U2 has current flowing through it and switches the associated reception diodes with low resistance.
  • the control input of the triac TR is supplied with a potential which is sufficient to control this switch.
  • an optocoupler U3 is provided, the transmission diode of which is connected in series with the transmission diode of the electronic AC switch U2. As long as the main thread of the signal lamp lights up, switches the switch S1 the transmitter diodes of the electronic AC switch U2 and the optocoupler U3 short, so that the switching transistor of this optocoupler is high-resistance.
  • the transmission diode of the optocoupler U3 only has current flowing through it and the switching transistor switched to low resistance when the secondary thread is switched on.
  • the transmitter diode of a corresponding optocoupler must be connected in series with the switching path of switch S1 or with that of the switching transistor of the first optocoupler U1.
  • the electronic switch S1 briefly switches the transmitter diode of the electronic alternating current switch U2 when the main current HF flows.
  • the arrangement can also be such that the switch S1 in this case disconnects the supply circuit for the transmission diode of this AC switch.
  • the switching transistor of the optocoupler U1 can also short-circuit the transmission diode of the optoelectronically controllable AC switch U2 directly or open its supply circuit. Because of the ripple of the voltage supplied to the transmitter diodes of the optocoupler U1, a very low pulsating DC voltage will be able to be tapped at the switching path of the optocoupler switching transistor. In order to prevent the optoelectronically controllable AC switch U2 from turning on as a result of this DC voltage, a capacitor for smoothing this voltage must be connected in parallel with the switching path of the optocoupler switching transistor. Possibly.
  • a zener diode must be connected in series with the transmitter diode of the optoelectronically controllable AC switch U2, the zener voltage of which is at least equal to the voltage across the capacitor when the optocoupler switching transistor is activated.
  • This Zener voltage is added to the forward voltage of the transmitter diode of the optoelectronically controllable AC switch and prevents the control when the main thread is lit. this switch.
  • the supply voltage for the anti-parallel input diodes of the optocoupler U1 is tapped in the exemplary embodiment of the invention explained above on the secondary winding of a current transformer T2, the primary winding of which is in series with the main thread of the signal lamp.
  • a current transformer T2 the primary winding of which is in series with the main thread of the signal lamp.
  • a single light-emitting diode can also be used as the transmitting diode of the optocoupler U1.
  • the main / secondary thread switch according to the invention manages with a minimum of inexpensive and proven electronic components in practice and is designed in such a way that monitoring messages for both the main and the secondary thread can easily be obtained by inserting further electronic components.

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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)
  • Audible And Visible Signals (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Power Conversion In General (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Time-Division Multiplex Systems (AREA)

Claims (9)

  1. Commutateur filament principal/filament secondaire pour des lampes à deux filaments, alimentées en courant alternatif, dans des installations de signaux de trafic, notamment dans des signaux lumineux ferroviaires, comportant un dispositif de contrôle du filament principal, qui est associé à chaque lampe d'un signal et qui est commandé par le courant de la lampe, pour le raccordement du filament secondaire lorsque le filament principal est fondu, caractérisé par le fait
    que le dispositif de contrôle du filament principal est agencé sous la forme d'un optocoupleur (U1), qui est couplé, côté entrée, par l'intermédiaire d'un transformateur, au circuit du filament principal ou qui est en parallèle avec une charge montée dans le circuit du filament principal,
    que le transistor de commutation de l'optocoupleur (U1) est relié à une tension continue et, à l'état réglé, court-circuite directement ou indirectement au moins une diode électroluminescente placée à une tension, ou interrompt son circuit d'alimentation,
    que cette diode électroluminescente et la diode d'émission d'un interrupteur à courant alternatif (U2), qui peut être commandé par voie optoélectronique et dont les diodes de réception sont reliées, par l'intermédiaire du filament secondaire (NF), au dispositif d'alimentation en courant (T1) et, lorsque la diode électroluminescente est parcourue par un courant, rendent conducteur un interrupteur électronique à courant alternatif (TR) disposé dans le circuit d'alimentation du filament secondaire.
  2. Commutateur filament principal/filament secondaire suivant la revendication 1, caractérisé par le fait que l'optocoupleur (U1) est relié, côté entrée, par l'intermédiaire du filament principal (HF) de la lampe (L) du signal, au dispositif d'alimentation en courant (T1) de cette lampe et comporte deux diodes d'entrée branchée selon un montage antiparallèle.
  3. Commutateur filament principal/filament secondaire suivant la revendication 1, caractérisé par le fait qu'à l'état réglé, le transistor de commutation de l'optocoupleur (U1) positionne un interrupteur électronique (S1) pour court-circuiter la ou les diodes d'émission de l'interrupteur à courant alternatif (U2) commandable par voie optoélectronique.
  4. Commutateur filament principal/filament secondaire suivant la revendication 3, caractérisé par le fait qu'un condensateur est branché en parallèle avec la voie de commutation du transistor de commutation de l'optocoupleur.
  5. Commutateur filament principal/filament secondaire suivant la revendication 3 ou 4, caractérisé par le fait qu'en série avec la ou les diodes d'émission de l'interrupteur à courant alternatif (U2) commandable par voie optoélectronique, est montée une diode Zener, dont la tension de Zener est au moins égale à la tension qui s'établit dans la voie de commutation du transistor de commutation réglé de l'optocoupleur ou aux bornes du condensateur.
  6. Commutateur filament principal/filament secondaire suivant la revendication 1 ou 2, caractérisé par le fait qu'en série avec la ou les diodes électroluminescentes de l'interrupteur à courant alternatif (U2) commandable par voie optoélectronique, avec la voie de commutation de l'interrupteur électronique (S1) et/ou avec la voie de commutation du premier transistor de commutation de l'optocoupleur, est branchée la diode électroluminescente d'au moins un autre optocoupleur (U3), dont le transistor de commutation sert à déclencher une signalisation de contrôle.
  7. Commutateur filament principal/filament secondaire suivant la revendication 3, caractérisé par le fait que l'interrupteur électronique (S1) est réalisé sous la forme d'un transistor à effet de champ.
  8. Commutateur filament principal/filament secondaire suivant l'une des revendications 1 à 7, caractérisé par le fait que la tension d'alimentation destinée à faire fonctionner les composants à courant continu du commutateur filament principal/filament secondaire peut être prélevée sur un redresseur (G) qui est relié, côté entrée, à un transformateur de lampe (T1), qui alimente la lampe (34) du signal.
  9. Commutateur filament principal/filament secondaire suivant la revendication 1, caractérisé par le fait que l'interrupteur électronique à courant alternatif (TR) est agencé sous la forme d'un triac.
EP90123331A 1989-12-14 1990-12-05 Commutateur filament principal-secours pour lampes à double filament alimentées en courant alternatif dans des installations de signalisation du trafic Expired - Lifetime EP0432625B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90123331T ATE102780T1 (de) 1989-12-14 1990-12-05 Haupt/nebenfadenumschalter fuer wechselstromgespeiste doppelfadenlampen in verkehrssignalanlagen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8914703U 1989-12-14
DE8914703U DE8914703U1 (fr) 1989-12-14 1989-12-14

Publications (2)

Publication Number Publication Date
EP0432625A1 EP0432625A1 (fr) 1991-06-19
EP0432625B1 true EP0432625B1 (fr) 1994-03-09

Family

ID=6845456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90123331A Expired - Lifetime EP0432625B1 (fr) 1989-12-14 1990-12-05 Commutateur filament principal-secours pour lampes à double filament alimentées en courant alternatif dans des installations de signalisation du trafic

Country Status (6)

Country Link
EP (1) EP0432625B1 (fr)
AT (1) ATE102780T1 (fr)
DE (2) DE8914703U1 (fr)
DK (1) DK0432625T3 (fr)
ES (1) ES2051444T3 (fr)
FI (1) FI97674C (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1181792B (de) * 1963-06-29 1964-11-19 Pintsch Bamag Ag UEberwachungsschaltung fuer Haupt- und Nebenfaeden von Gluehlampen, insbesondere Signallampen
DE1566901A1 (de) * 1967-03-21 1970-04-30 Licentia Gmbh Anordnung zur UEberwachung von Signallampen auf Fadenbruch
NL178634C (nl) * 1978-01-02 1986-04-16 Philips Nv Inrichting voor het detecteren van ongewenste signaalcombinaties van twee signaallampen bij verkeerslichten.
US4380718A (en) * 1981-05-22 1983-04-19 Kelsey-Hayes Co. Trailer marker light substitution circuit

Also Published As

Publication number Publication date
FI906150A (fi) 1991-06-15
FI97674B (fi) 1996-10-15
DE59004905D1 (de) 1994-04-14
ATE102780T1 (de) 1994-03-15
EP0432625A1 (fr) 1991-06-19
DE8914703U1 (fr) 1990-02-22
DK0432625T3 (da) 1994-06-20
ES2051444T3 (es) 1994-06-16
FI97674C (fi) 1997-01-27
FI906150A0 (fi) 1990-12-13

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