Preliminary evaluation of the Intelligent Lighting System with distributed control modules

In our laboratory, Intelligent Lighting System is proposed as lighting control system targeting office environment. Currently, a verification experiments of Intelligent Lighting System is conducted in an actual office. In the verification experiments conducted in large scale offices, an issue of complex wiring was clarified. Intelligent Lighting System uses analog communication for the information acquisition from the illuminance sensors. Therefore, the wiring becomes complex when the system becomes large. On the other hand, Intelligent Lighting System has been studied as a distributed control system equipped with an individual lighting control device, but the systems that used in the verification experiments are centralized control systems that controls all lighting fixtures with one centralized control device. Because of the high development cost of the control device which can be equipped in a lighting fixture. However, these system configurations have the different features, respectively. Therefore, appropriate system configuration is different by the office which introduces Intelligent Lighting System. In this study, we develop illuminance sensors with digital communication technology in order to solve the complexity of wiring. Additionally, distributed control Intelligent Lighting System is constructed by using the proposed control devices which can be equipped in a lighting fixture, and its illuminance convergence is verified.