| 摘要 |
PROBLEM TO BE SOLVED: To control a dimming space in a lighting control system so as to keep it at a certain target illuminance on the basis of a prescribed dimming control algorithm, while dispensing with preliminary illuminance setting work.SOLUTION: A control unit 83 incorporated in a luminaire 8 comprises: a storage part 13 which stores therein a preset target illuminance and a measured illuminance measured by a sensor part 81; a determination part 15 which detects a difference between the target illuminance and the measured illuminance to determine whether the difference is within a permissible range; and a microcomputer part 12 which, when the difference is determined not to be within a permissible range, first exerts dimming control with a dimming change amount of a small value as a control algorithm and calculates a control relation value from the relation between the dimming change amount and a luminance value change amount measured by the sensor part 81, and then calculates a dimming control amount on the basis of the control relation value. This composition makes it possible to control a dimming space in a lighting control system so as to keep it at a certain target illuminance on the basis of the control algorithm, while dispensing with preliminary illuminance setting work. |
