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:
Jan. 26, 2016
Filed:
Mar. 13, 2013
Koninklijke Philips N.v., Eindhoven, NL;
David Ricardo Caicedo Fernández, Eindhoven, NL;
Willem Franke Pasveer, Dordrecht, NL;
Jelena Matovina, Eindhoven, NL;
Michel Albertus Theodorus Klein Swormink, Eindhoven, NL;
Jurgen Mario Vangeel, Beerse, BE;
Roger Peter Anna Delnoij, Lommel, BE;
Wijnand Johannes Rietman, Eindhoven, NL;
Ashish Vijay Pandharipande, Eindhoven, NL;
Biju Kumar Sreedharan Nair, Veldhoven, NL;
Geert Bart Neuttiens, Hillegem, BE;
KONINKLIJKE PHILIPS N.V., Eindhoven, NL;
Abstract
A network of active sensors in a control system is considered. The active sensors, which may be fixed-infrastructure sensors, provide presence detection information to a distributed lighting system. The active sensors communicate by transmitting probe signals. The communication of probe signals may result in cross-interference which may vary in time. Cross-interference is detected, and can later be avoided, by determining a difference between signals received in a first part of a timeslot and signals received in a second part of the timeslot. In order to do so probe signals comprising two non-zero pulses are transmitted in respective parts of the timeslot. Applications are, for example, active presence sensors in lighting control applications in indoor as well as outdoor environments.