ANORDNING FOR REGLERING AV BELYSNINGSARMATURER, I SYNNERHET VID BELYSNINGSSYSTEM INOMHUS

摘要

A device for control of lighting fixtures, especially in indoor lighting systems intended for installation over the area to be illuminated. A light detector (16) is connected to an electronic circuit (27-29) for control of this. A shield (17) is designed to limit incoming light on the detector so that it comes from an eligible area of measurement. An optical filter (18) placed in front of the detector (16) is found, which primarily transmits light in an area of the spectrum where the relationship between the inherent optical signal and the main optical signal is at a minimum. The detector (16) is preferably constructed of a material with high spectral sensitivity in the area where the relationship between the inherent optical signal and the main optical signal is at a minimum. Moreover, the electronic circuit (29) is designed to calculate a main signal that corresponds to the main optical signal on the basis of the variation in the illumination that is registered during a period of alternating current. This main signal is used as the basis for control of the fixture.