An intelligent lighting system to provide individual lighting using the estimation of daylight

個別照度環境を実現する照明システムを実際のオフィスに導入したところ,机上面に照度センサを置くことが容易ではない状況が存在した.本研究では机上面に照度センサを置かずに個別照度環境を実現する照明システムの新たな制御手法を提案する.照度センサをパーティションの上など容易に設置できる場所に設置し,外光照度を測定する.照明による照度シミュレーションと照度センサから得られた外光照度を基にユーザの指定した位置に要求照度を実現する.実オフィスを模擬した15台の蛍光灯と9台の照度センサを用いて,要求照度設定位置の要求照度を収束させる実験を行った.その結果,外光の変化にも対応し,ユーザが要求する照度を省エネルギーな点灯状況で実現できることを示した.When we introduced a lighting system to realize individual lighting environments into real office environments, difficulties arose in placing illuminance sensors on users\u27 workplaces. This study hence proposes a new approach to control a lighting system intended to realize individual lighting environments without placing illuminance sensors on users\u27 workplaces. This system uses illuminance sensors for measuring not the illuminance on workplaces but that of daylight: it optimizes lighting based on simulations for different luminous intensities of lighting and patterns of daylight illuminance distribution which are estimated from measurements by daylight illuminance sensors. An experiment to converge illuminance at target positions into target illuminance levels was conducted in a setting with 15 fluorescent lights and 9 illuminance sensors, which was intended to simulate a real office environment. The result indicated that such a system can realize illuminance levels required by individual users with minimum power consumption responding to changing daylight conditions