Method and System for Illumination Management

摘要

A luminaire can comprise a system that automatically adjusts light output from the luminaire to control light level in an illuminated area. The system can increase light output if the light level in the area falls below a target light level or decrease light output if the light level in the area rises above the target. For example, when the area is illuminated by a combination of sunlight and luminaire light, the light level can be maintained at the target level by gradually decreasing light output as the sunlight contribution increases in the morning and by gradually increasing light output as the sunlight contribution decreases in the evening. The system adjustments can take into consideration whether the light level is offset from the target due to a change in the target or a short-term fluctuation that may be due to a cloud temporarily blocking the sun.

主权项

1. A system comprising:
a sensor comprising a first output configured to emit a first signal indicative of light level in an area; a processor that comprises:
an input connected to the first output of the light sensor;a second output configured to emit a second signal that controls light produced by a light source; andmemory; and processor executable instructions stored in the memory for performing the steps of:
determining whether a difference between the light level and a target is due to a change in the target or due to a change in the light level;setting the second signal to adjust the produced light according to the determination;if the difference is due to a change in the light level, determining whether the difference continues for a period of time;if the difference is determined to continue for the period of time, then setting the second signal to adjust the produced light; andif the difference is determined to cease during the period of time, then not setting the second signal to adjust the produced light.