Control of lighting devices

摘要

Presence adaptive lighting control strategies are known to be very effective in reducing energy consumption in buildings. Ultrasonic array sensors have been proposed for reliable presence sensing. Systems and methods are disclosed by which additional sensing functionalities may be enabled for providing new control functions, with the array sensor as basic sensing platform. In particular, hybrid sensing that combines portable sensors (possibly, user enabled) and fixed-infrastructure sensors is considered. Applications are, for example, active presence sensors in lighting control applications.

主权项

1. A control system, comprising:
a light source; a first active sensor comprising a transmitter arranged to transmit a first probe signal, wherein the first active sensor is a portable sensor; a second active sensor comprising a transmitter arranged to transmit a second probe signal, wherein the second active sensor is a fixed sensor, and further comprising a receiver sensor array arranged to receive said first probe signal and an echo of said second probe signal; and a processing unit configured to predictively estimate a location of said first active sensor within the receiver sensor array based on said received first probe signal, and further configured to control a lighting function of said light source in accordance with said predictively estimated location of said first active sensor; wherein said first probe signal is different from said second probe signal such that interference at said receiving sensor array between said first probe signal and said second probe signal is avoided, the waveform of the first probe signal being chosen to be uncorrelated to the waveform of the second probe signal.