Koninklijke Philips Corporation N.v.

Geert Bart Neuttiens

Ashish Vijay Pandharipande

Willem Franke Pasveer

Jurgen Mario Vangeel

Roger Peter Anna Delnoij

Biju Kumar Sreedharan Nair

Wijnand Johannes Rietman

David Ricardo Caicedo Fernández

Michel Albertus Theodorus Klein Swormink

Jelena Matovina

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.

Control of lighting devices

Growing community of inventors

Hillegem, Belgium

Geert Bart Neuttiens