| 摘要 |
PROBLEM TO BE SOLVED: To provide an illumination control system capable of giving no sense of incompatibility, and saving energy, although illumination is controlled by a detected output of a human body sensor. SOLUTION: The frequency of receiving a detected signal is counted at each prescribed observation time, and a human detection counter corresponding to the human body sensor is incremented to detect whether a counted value of the human detection counter is not smaller than a specified value (S12). When a flow is branched to YES in the step S12, whether a delay time reaches its upper limit value is detected (S16), and when it has not reached the upper limit value, the delay time is increased by three minutes to make it difficult to promptly lower the quantity of an illumination output to a specified value in an unmanned state. When the flow is branched to NO in the step S12, whether the delay time reaches its lower limit value is detected (S13), and when it has not reached the lower limit value, the delay time is reduced by thirty seconds to control the system so that energy is saved by shortening a time used until the quantity of illumination output is lowered to the specified value in an unmanned state. COPYRIGHT: (C)2009,JPO&INPIT |
