FI20040165A - System for condition monitoring - Google Patents

System for condition monitoring Download PDF

Info

Publication number
FI20040165A
FI20040165A FI20040165A FI20040165A FI20040165A FI 20040165 A FI20040165 A FI 20040165A FI 20040165 A FI20040165 A FI 20040165A FI 20040165 A FI20040165 A FI 20040165A FI 20040165 A FI20040165 A FI 20040165A
Authority
FI
Finland
Prior art keywords
condition monitoring
monitoring
condition
Prior art date
Application number
FI20040165A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI116356B (en
FI20040165A0 (en
Inventor
Jari Tabell
Markku Kauko
Original Assignee
Teknoware Oy
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 Teknoware Oy filed Critical Teknoware Oy
Priority to FI20040165A priority Critical patent/FI116356B/en
Publication of FI20040165A0 publication Critical patent/FI20040165A0/en
Priority to DE602005005095T priority patent/DE602005005095T8/en
Priority to EP05100565A priority patent/EP1562406B1/en
Publication of FI20040165A publication Critical patent/FI20040165A/en
Application granted granted Critical
Publication of FI116356B publication Critical patent/FI116356B/en

Links

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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/58—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving end of life detection of LEDs
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/12—Controlling the intensity of the light using optical feedback
FI20040165A 2004-02-03 2004-02-03 Condition monitoring system FI116356B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FI20040165A FI116356B (en) 2004-02-03 2004-02-03 Condition monitoring system
DE602005005095T DE602005005095T8 (en) 2004-02-03 2005-01-28 Method and device for condition monitoring of LEDs
EP05100565A EP1562406B1 (en) 2004-02-03 2005-01-28 Method and apparatus for monitoring the condition of LEDs

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20040165 2004-02-03
FI20040165A FI116356B (en) 2004-02-03 2004-02-03 Condition monitoring system

Publications (3)

Publication Number Publication Date
FI20040165A0 FI20040165A0 (en) 2004-02-03
FI20040165A true FI20040165A (en) 2005-08-04
FI116356B FI116356B (en) 2005-10-31

Family

ID=31725649

Family Applications (1)

Application Number Title Priority Date Filing Date
FI20040165A FI116356B (en) 2004-02-03 2004-02-03 Condition monitoring system

Country Status (3)

Country Link
EP (1) EP1562406B1 (en)
DE (1) DE602005005095T8 (en)
FI (1) FI116356B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007036509A1 (en) * 2005-09-27 2007-04-05 Siemens Aktiengesellschaft Method and device for monitoring the light signal from an electrooptical light element, in particular a high-current led, which is used for railway purposes, of a safe railway signal
DE102005051212A1 (en) * 2005-10-26 2007-05-03 Bayerische Motoren Werke Ag Illuminant function monitoring method for use in motor vehicle, involves modulating luminance of illuminant by measuring operating parameter of illuminant, where time of measurement is synchronized with control of illuminant
DE102007043416B4 (en) * 2007-09-12 2009-09-17 P.E.R. Flucht- Und Rettungsleitsysteme Gmbh Emergency lighting method and system
DE102007045259A1 (en) 2007-09-21 2009-04-02 Continental Automotive Gmbh Method and device for detecting the light output emitted by an LED light source
DE102007049618A1 (en) 2007-10-17 2009-04-23 Audi Ag Device and method for determining an operating parameter of at least one light source of a light source of a motor vehicle
DE102008034524B4 (en) * 2008-07-24 2019-12-05 Tridonic Gmbh & Co Kg emergency pack
JP2013528313A (en) * 2010-06-08 2013-07-08 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Fail-safe lighting system
DE102016205529A1 (en) * 2016-04-04 2017-10-05 Osram Gmbh Method for measuring light
US9648697B1 (en) * 2016-04-19 2017-05-09 Leviton Manufacturing Co., Inc. Brightness monitoring for LED failures and daylighting target adjusting

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5783909A (en) * 1997-01-10 1998-07-21 Relume Corporation Maintaining LED luminous intensity
GB9708861D0 (en) * 1997-04-30 1997-06-25 Signal House Limited Traffic signals
ATE285103T1 (en) * 1998-07-23 2005-01-15 Siemens Ag LIGHT SIGNAL SYSTEM AND METHOD FOR MONITORING THE LIGHT SIGNAL SYSTEM
US20030015973A1 (en) * 2001-07-18 2003-01-23 Kevin Ovens Solid state traffic light with predictive failure analysis
US6836260B2 (en) * 2001-07-31 2004-12-28 Eastman Kodak Company Light emitting flat-panel display

Also Published As

Publication number Publication date
DE602005005095T8 (en) 2009-05-20
EP1562406B1 (en) 2008-03-05
FI116356B (en) 2005-10-31
DE602005005095D1 (en) 2008-04-17
FI20040165A0 (en) 2004-02-03
EP1562406A1 (en) 2005-08-10
DE602005005095T2 (en) 2009-01-29

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