The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 2016
Filed:
Apr. 12, 2013
Koninklijke Philips N.v., Eindhoven, NL;
Theodorus Jacobus Johannes Denteneer, Eindhoven, NL;
Oscar Garcia Morchon, Aachen, DE;
Ashish Vijay Pandharipande, Eindhoven, NL;
David Ricardo Caicedo Fernández, Eindhoven, NL;
KONINKLIJKE PHILIPS N.V., Eindhoven, NL;
Abstract
The present invention relates to a method of detecting a failed luminaire and/or light sensor in a lighting system comprising M luminaires and N light sensors. The elements Dof an N×M transfer matrix D expresses how each luminaire l affect a light sensor s with respect to sensed light intensity, wherein s=1, 2, . . . N, and l=1, 2, . . . , M. The method comprises the steps of: setting the intensity of light emitted by the respective luminaires in the lighting system to a first intensity setting according to the respective elements of a first intensity vector I(), determining a first sensor intensity vector E(), setting the intensity of light emitted by the respective luminaires to at least a second intensity setting according to the respective elements of a second intensity vector I(), wherein at least one element of Idiffers from a corresponding element or elements in determining a second sensor intensity vector E(), determining fault detection vectors from a difference between Eand D·I) and between Eand D·I, respectively (), and identifying a failed luminaire and/or light sensor on basis of a difference between corresponding elements of the respective fault detection vectors (). The present invention further relates to a failure detection system for detecting a failed luminaire and/or light sensor.