EP0774884A2 - Detektor zur Erkennung einer defekten Lampe - Google Patents

Detektor zur Erkennung einer defekten Lampe Download PDF

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Publication number
EP0774884A2
EP0774884A2 EP96308257A EP96308257A EP0774884A2 EP 0774884 A2 EP0774884 A2 EP 0774884A2 EP 96308257 A EP96308257 A EP 96308257A EP 96308257 A EP96308257 A EP 96308257A EP 0774884 A2 EP0774884 A2 EP 0774884A2
Authority
EP
European Patent Office
Prior art keywords
lamp
voltage
control
failed
dimmer 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.)
Withdrawn
Application number
EP96308257A
Other languages
English (en)
French (fr)
Other versions
EP0774884A3 (de
Inventor
John Woodnutt
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.)
Delmatic Ltd
Original Assignee
Delmatic Ltd
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 Delmatic Ltd filed Critical Delmatic Ltd
Publication of EP0774884A2 publication Critical patent/EP0774884A2/de
Publication of EP0774884A3 publication Critical patent/EP0774884A3/de
Withdrawn legal-status Critical Current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

  • This invention relates to a failed light detector and in particular to a failed light detector of the type which can be used in a remotely controlled lighting system of the type proposed in our British patent application No. GB-A-2278473 and with a dimmable digital electronic ballast for lamp control such as the Trilux DD58.1-23031 electronic ballast.
  • dimmable lights in such a control system.
  • These, and conventional remotely controlled lights are usually operated by some form of digital electronic ballast such as are manufactured by Trilux Lighting Limited.
  • the Trilux DD58.1-23031 is a dimmable digital electronic lamp ballast.
  • Many digital electronic ballasts such as these provide a positive voltage level on their control input. The lamp is them dimmed by pulling the positive voltage line to a lower voltage. Alternatively the lamp may be dimmed by the application of a pulse waveform for example the Manchester code depending on the type of dimmer unit used.
  • a pulse waveform for example the Manchester code depending on the type of dimmer unit used.
  • the light that that digital electronic ballast is controlling fails the 10 volt output drops to zero. We have appreciated that this can be used to detect remotely whether or not a lamp has failed.
  • the figure shows an addressable control module 2 of the type which would be used in a remotely controlled lighting system such as described in our British patent application No. GB-A-2278473.
  • This receives input control signals from a central controller and sends these signals back to the central controller with the response to any status enquiry.
  • This addressable control module is capable of responding to status enquiries and of switching and dimming a lamp.
  • the addressable control is coupled to an analogue control unit 14 to control dimming of the light.
  • the addressable control module sends signals 16 which are used to dim the light.
  • the analogue control unit 16 is also used to check periodically whether or not the lamp has failed.
  • a 0 to 10V control unit 18 which has 0 and 10 volt outputs.
  • the 10 volt output is coupled via a reverse biased diode 20 to the positive voltage (in this case 10 volt) output of the dimmer control on a digital electronic lamp ballast 22.
  • the 0 volt output of the control unit 18 is coupled to the 0 volt output of the lamp ballast. The lamp is dimmed by reducing the voltage level of the 10 volt output on the control unit 18.
  • a comparator Also included in the analogue control unit 14 is a comparator.
  • the two inputs to this are coupled across the reverse biased diode 20.
  • the difference in the comparator inputs will be the diode voltage drop which may be, for example, 0.7V. This is taken as effectively zero difference and the comparator does not generate any output in response to this. In this situation the dimmer unit output is pulled to a voltage level less than 10V by the analogue control unit to dim the light.
  • the comparator is used, whilst the lamp is in operation, to determine whether or not there has been a failure of the lamp. In order to do this the 10 volt output of the control unit 18 must be at a positive voltage and the lamp must be switched on. The comparator determines the difference in voltage across the diode. If the lamp is working the voltage measured will be the standard 0.7V drop across the diode. However, if the lamp has failed the voltage level between the diode 20 and the lamp ballast 22 will have dropped to zero. The comparator will therefore detect a voltage of opposite polarity to this 0.7V diode drop and equivalent to the output level of the analogue control unit. This is detected by the addressable control module and a lamp failure signal is output back to the central controller.
  • the comparator can be operated continuously or at intervals to determine whether or not the lamp has failed. In the event that a failure is detected and transmitted to the central controller, an engineer can be sent to replace the lamp in question.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
EP96308257A 1995-11-15 1996-11-15 Detektor zur Erkennung einer defekten Lampe Withdrawn EP0774884A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9523433A GB2307321A (en) 1995-11-15 1995-11-15 Failed light detector
GB9523433 1995-11-15

Publications (2)

Publication Number Publication Date
EP0774884A2 true EP0774884A2 (de) 1997-05-21
EP0774884A3 EP0774884A3 (de) 1997-12-10

Family

ID=10783975

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96308257A Withdrawn EP0774884A3 (de) 1995-11-15 1996-11-15 Detektor zur Erkennung einer defekten Lampe

Country Status (2)

Country Link
EP (1) EP0774884A3 (de)
GB (1) GB2307321A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6963170B2 (en) 2002-03-01 2005-11-08 Tapeswitch Ltd. Lamp monitor and lamp

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9520742B2 (en) 2014-07-03 2016-12-13 Hubbell Incorporated Monitoring system and method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2278473A (en) 1993-05-26 1994-11-30 Delmatic Ltd Remote control systems

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3544803A (en) * 1968-04-01 1970-12-01 Motorola Inc Vehicular electrical systems
DE2433025A1 (de) * 1974-07-10 1976-01-22 Bosch Gmbh Robert Verfahren und vorrichtung zum steuern und kontrollieren von elektrischen schaltvorgaengen, insbesondere in kraftfahrzeugen
JPH0629116Y2 (ja) * 1985-04-12 1994-08-10 株式会社東海理化電機製作所 ランプの断線検出装置
GB2174852B (en) * 1985-05-02 1988-12-07 Tann Electronics Ltd Airfield lighting installations
DE4039161C2 (de) * 1990-12-07 2001-05-31 Zumtobel Ag Dornbirn System zur Steuerung der Helligkeit und des Betriebsverhaltens von Leuchtstofflampen
FI95420C (fi) * 1991-11-13 1997-05-14 Heikki Korkala Älykäs lamppu tai lampun älykäs liitäntäkanta
JP2600004Y2 (ja) * 1992-09-16 1999-09-27 株式会社小糸製作所 車輌用放電灯の点灯回路
GB2286891B (en) * 1994-02-24 1997-12-17 Strand Lighting Ltd Dimmer fault reporting

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2278473A (en) 1993-05-26 1994-11-30 Delmatic Ltd Remote control systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6963170B2 (en) 2002-03-01 2005-11-08 Tapeswitch Ltd. Lamp monitor and lamp

Also Published As

Publication number Publication date
GB9523433D0 (en) 1996-01-17
EP0774884A3 (de) 1997-12-10
GB2307321A (en) 1997-05-21

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