EP0434859A1 - Dispositif de surveillance du bon fonctionnement d'une lampe à incandescence - Google Patents

Dispositif de surveillance du bon fonctionnement d'une lampe à incandescence Download PDF

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Publication number
EP0434859A1
EP0434859A1 EP89123950A EP89123950A EP0434859A1 EP 0434859 A1 EP0434859 A1 EP 0434859A1 EP 89123950 A EP89123950 A EP 89123950A EP 89123950 A EP89123950 A EP 89123950A EP 0434859 A1 EP0434859 A1 EP 0434859A1
Authority
EP
European Patent Office
Prior art keywords
incandescent lamp
resistance
switched
arrangement
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89123950A
Other languages
German (de)
English (en)
Other versions
EP0434859B1 (fr
Inventor
Peter Dipl.-Ing. Schürmans
Heinz Dipl.-Ing. Laumen
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.)
Scheidt and Bachmann GmbH
Original Assignee
Scheidt and Bachmann GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Scheidt and Bachmann GmbH filed Critical Scheidt and Bachmann GmbH
Priority to EP89123950A priority Critical patent/EP0434859B1/fr
Priority to DE8989123950T priority patent/DE58904882D1/de
Priority to ES89123950T priority patent/ES2042959T3/es
Priority to AT89123950T priority patent/ATE91376T1/de
Publication of EP0434859A1 publication Critical patent/EP0434859A1/fr
Application granted granted Critical
Publication of EP0434859B1 publication Critical patent/EP0434859B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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 an arrangement for monitoring the functionality of an incandescent lamp connected by lines to an energy source, the continuity of the circuit being checked in each case in the switched-off state with low energy without any visible effect of the incandescent lamp and / or in the switched-on state by determining an energy flow.
  • incandescent lamps used in signaling technology it is known to monitor their functionality, since it is extremely important, for example in signaling systems for rail and road traffic, to immediately identify defective incandescent lamps and replace them with functioning incandescent lamps.
  • incandescent lamps Two different arrangements for monitoring the functionality of incandescent lamps are known, which are connected to an energy source by means of lines.
  • the continuity of the circuit is checked when the incandescent lamp is switched off with low energy so that there is no visible effect of the incandescent lamp; this monitoring method is also called “dark current method”.
  • the known methods and arrangements for monitoring the functionality of an incandescent lamp have a decisive disadvantage. Even in the event of a defective light bulb, the continuity of the respective circuit can be determined both when the light bulb with low energy is switched off and when it is switched on when there is a short or shunt between the lines or in the lamp base. Such a short-circuit or shunt prevents energy flow in the switched-on state, even in the switched-off state, and the low-current dark current process is not carried out in the switched-off state.
  • the known arrangements are consequently not suitable for carrying out proper monitoring of the functionality of incandescent lamps with the necessary certainty and for precluding a positive test result from being reported even though the incandescent lamp is defective.
  • the invention has for its object to provide an arrangement of the type described above for monitoring the functionality of an incandescent lamp, which distinguishes a continuity of the circuit generated by short or shunt from the continuity of the circuit when the incandescent lamp is working and excludes positive test results despite a defective incandescent lamp.
  • the solution to this problem by the invention is characterized in that the ratio of the resistance of the arrangement in the switched-off state to the resistance of the arrangement in the switched-on state is determined and with the ratio of the current for the light bulb to be monitored Cold-hot resistance is compared, taking into account the line resistances for submitting a message for the monitoring result.
  • the ratio of its resistance is known once in the cold and the other in the warm state.
  • this resistance ratio which is valid for the respective incandescent lamp, is compared, taking into account the respective line resistances, with the resistance ratio that results for the monitoring arrangement if, once the incandescent lamp is switched off, the continuity of the circuit with low energy and on the other hand when the incandescent lamp is switched on Circuit is checked by supplying normal energy. If the resistance ratio determined during the check matches the valid ratio of the cold-warm resistance, a positive monitoring result is reported. If there is no continuity in the circuit when feeding in low or high energy, a negative message is issued.
  • the monitoring of the functionality also leads to a negative message if continuity of the circuit is determined with both low and normal energy, but the resistance ratio determined here does not match the ratio of the cold-warm resistance of the incandescent lamp to be checked. In this case, there is either a short circuit or a shunt, which leads to continuity of the circuit despite the faulty light bulb.
  • the target resistance ratio of the respective arrangement is determined once when the arrangement is started up and stored as a comparison value for the monitoring during operation. In this way, it is avoided that the ratio of the cold-warm resistance of the incandescent lamp to be monitored in each case has to be determined and stored, taking into account the respective line resistances. In the arrangement according to the invention, this ratio is instead determined once when the arrangement is started up and stored as a comparison value which is used in each case during the monitoring operations which take place during operation.
  • the invention proposes to carry out a check at the beginning of each switch-on process of the incandescent lamp. Since both the continuity of the circuit and the respective resistance of the arrangement can be determined briefly with low energy and then with normal energy flow with each switch-on process and the resistance ratio can be formed, it is possible according to the above development of the arrangement according to the invention, the respective filament lamp reliably to monitor their functionality.
  • FIG. 1 An exemplary embodiment of the arrangement according to the invention is shown in the drawing using a block diagram in FIG. 1 and an associated diagram in FIG.
  • an incandescent lamp 1 is fed by an energy source 2, the line resistance of the two lines 3 and 4 of the circuit running between the energy source 2 and the incandescent lamp 1 being represented by the resistors 3a and 4a. These resistors 3a and 4a thus depend on the line length and the line cross-section.
  • a current meter 5 is arranged in line 3; a voltmeter 6 is connected between the two lines 3 and 4.
  • the measurement results of both measuring devices 5 and 6 are sent to an evaluation circuit 7, preferably an electronic computer.
  • the cold resistance of the bulb 1 including the resistors 3a and 4a are calculated in the evaluation circuit 7 in that current and voltage are measured by the ammeter 5 and the voltmeter 6 with a low energy supply.
  • the energy supplied here is so low that the filament of the incandescent lamp 1 does not heat up and consequently the incandescent lamp 1 does not light up visibly for the human eye.
  • the incandescent lamp 1 is then illuminated and the warm resistance is now calculated by measuring the current and voltage in the evaluation circuit 7. The ratio of the cold resistance to the warm resistance is formed and stored in the evaluation circuit 7.
  • Corresponding measurements and calculations are carried out at regular intervals during the operation of the incandescent lamp 1, preferably each time the incandescent lamp 1 is switched on. A comparison of this regularly calculated resistance ratio with the stored target value ratio determines whether the incandescent lamp 1 is functional or whether the determined continuity of the Circuit goes back to a short or shunt. Only if the cold-warm resistance of the respective calculations corresponds to the setpoint ratio, which was determined and saved including the system-specific line resistances, do the measurements result in a positive function message.
  • a characteristic resistance curve of an incandescent lamp 1 is shown in the diagram in FIG.
  • an impending failure of the incandescent lamp 1 can additionally be recognized by comparing the currently measured warm resistance with the warm resistance measured after the first start-up, so that tendency changes can be recognized.
  • the evaporation process which preferably consists of one Tungsten filament existing filament will namely increase the heat resistance of the filament by increasing the operating time by reducing the filament cross-section and thus give an evaluable statement about the remaining life of the filament lamp.
  • the warm resistance of the incandescent lamp 1 measured when the incandescent lamp 1 was put into operation for the first time is stored. The warm resistances measured during operation are compared with this stored value.
  • a message is issued which contains, for example, a request to replace the incandescent lamp 1. This makes it possible not to wait for the total failure of the incandescent lamp 1, but to replace it in good time, which is particularly important in traffic signal systems for traffic control.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Road Signs Or Road Markings (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
EP89123950A 1989-12-27 1989-12-27 Dispositif de surveillance du bon fonctionnement d'une lampe à incandescence Expired - Lifetime EP0434859B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP89123950A EP0434859B1 (fr) 1989-12-27 1989-12-27 Dispositif de surveillance du bon fonctionnement d'une lampe à incandescence
DE8989123950T DE58904882D1 (de) 1989-12-27 1989-12-27 Anordnung zur ueberwachung der funktionsfaehigkeit einer gluehlampe.
ES89123950T ES2042959T3 (es) 1989-12-27 1989-12-27 Dispositivo para la vigilancia de la funcionalidad de una lampara incandescente.
AT89123950T ATE91376T1 (de) 1989-12-27 1989-12-27 Anordnung zur ueberwachung der funktionsfaehigkeit einer gluehlampe.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89123950A EP0434859B1 (fr) 1989-12-27 1989-12-27 Dispositif de surveillance du bon fonctionnement d'une lampe à incandescence

Publications (2)

Publication Number Publication Date
EP0434859A1 true EP0434859A1 (fr) 1991-07-03
EP0434859B1 EP0434859B1 (fr) 1993-07-07

Family

ID=8202282

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89123950A Expired - Lifetime EP0434859B1 (fr) 1989-12-27 1989-12-27 Dispositif de surveillance du bon fonctionnement d'une lampe à incandescence

Country Status (4)

Country Link
EP (1) EP0434859B1 (fr)
AT (1) ATE91376T1 (fr)
DE (1) DE58904882D1 (fr)
ES (1) ES2042959T3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4233664A1 (de) * 1992-10-07 1994-04-14 Elektrofachgeschaeft Hans Jahn Halogen-Scheinwerfer für eine Alarmanlage
WO1994008438A1 (fr) * 1992-09-25 1994-04-14 Siemens Aktiengesellschaft Procede et dispositif pour le controle d'une lampe a incandescence, en particulier en situation d'obscurite
WO2003017728A1 (fr) * 2001-08-16 2003-02-27 Siemens Aktiengesellschaft Signal lumineux destine a la commande du trafic et procede de controle du fonctionnement d'un tel signal
DE10256894A1 (de) * 2002-11-29 2004-06-09 Volkswagen Ag Verfahren und Vorrichtung zur Diagnose von Glühlampen
DE10332515A1 (de) * 2003-07-17 2005-02-10 Robert Bosch Gmbh Lampenansteuerung für spektroskopische Sensoren
DE102007003575A1 (de) * 2006-01-24 2007-08-02 Koito Manufacturing Co., Ltd. Beleuchtungssteuergerät für eine Fahrzeugbeleuchtungsvorrichtung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0204836D0 (en) 2002-03-01 2002-04-17 Tapeswitch Ltd Lamp monitor and lamp
DE102005032637A1 (de) * 2005-07-13 2007-01-25 Dr.Ing.H.C. F. Porsche Ag Diebstahlwarnanlage für ein Kraftfahrzeug

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3121311A1 (de) * 1981-05-29 1983-01-27 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zur ermittlung der ausfallkennlinie eines lampenkreises und schaltungsanordnung zur durchfuehrung des verfahrens
GB2168211A (en) * 1984-11-19 1986-06-11 Nissan Motor Electrical load condition determining apparatus
DE3601665A1 (de) * 1986-01-21 1987-07-23 Gerda Schmidt Verfahren zur ermittlung der optimalen betriebsdauer wenigstens einer stromverbrauchenden lichtquelle, insbesondere einer leuchtstoffroehre
EP0246614A2 (fr) * 1986-05-22 1987-11-25 ZELTRON - Istituto Zanussi per la Ricerca S.p.A. Appareil et méthode pour tester des lampes à incandescence ayant un bulbe de verre

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3121311A1 (de) * 1981-05-29 1983-01-27 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zur ermittlung der ausfallkennlinie eines lampenkreises und schaltungsanordnung zur durchfuehrung des verfahrens
GB2168211A (en) * 1984-11-19 1986-06-11 Nissan Motor Electrical load condition determining apparatus
DE3601665A1 (de) * 1986-01-21 1987-07-23 Gerda Schmidt Verfahren zur ermittlung der optimalen betriebsdauer wenigstens einer stromverbrauchenden lichtquelle, insbesondere einer leuchtstoffroehre
EP0246614A2 (fr) * 1986-05-22 1987-11-25 ZELTRON - Istituto Zanussi per la Ricerca S.p.A. Appareil et méthode pour tester des lampes à incandescence ayant un bulbe de verre

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994008438A1 (fr) * 1992-09-25 1994-04-14 Siemens Aktiengesellschaft Procede et dispositif pour le controle d'une lampe a incandescence, en particulier en situation d'obscurite
DE4233664A1 (de) * 1992-10-07 1994-04-14 Elektrofachgeschaeft Hans Jahn Halogen-Scheinwerfer für eine Alarmanlage
WO2003017728A1 (fr) * 2001-08-16 2003-02-27 Siemens Aktiengesellschaft Signal lumineux destine a la commande du trafic et procede de controle du fonctionnement d'un tel signal
US7129856B2 (en) 2001-08-16 2006-10-31 Siemens Aktiengesellschaft Illuminated sign for traffic control and method for functional monitoring of such a sign
DE10256894A1 (de) * 2002-11-29 2004-06-09 Volkswagen Ag Verfahren und Vorrichtung zur Diagnose von Glühlampen
DE10332515A1 (de) * 2003-07-17 2005-02-10 Robert Bosch Gmbh Lampenansteuerung für spektroskopische Sensoren
DE102007003575A1 (de) * 2006-01-24 2007-08-02 Koito Manufacturing Co., Ltd. Beleuchtungssteuergerät für eine Fahrzeugbeleuchtungsvorrichtung
DE102007003575B4 (de) * 2006-01-24 2009-01-29 Koito Manufacturing Co., Ltd. Beleuchtungssteuergerät für eine Fahrzeugbeleuchtungsvorrichtung
US7528553B2 (en) 2006-01-24 2009-05-05 Koito Manufacturing Co., Ltd. Lighting control apparatus for vehicle lighting device

Also Published As

Publication number Publication date
ATE91376T1 (de) 1993-07-15
ES2042959T3 (es) 1993-12-16
DE58904882D1 (de) 1993-08-12
EP0434859B1 (fr) 1993-07-07

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