LIGHT-EMITTING SECTION, PHOTO-ELECTRIC SMOKE SENSOR AND SUCTION-TYPE SYSTEM FOR SMOKE DETECTION Russian patent published in 2015 - IPC G08B17/103 

FIELD: measurement equipment.

SUBSTANCE: invention relates to a light-emitting section with increased light-emission intensity, to a photo-electric smoke sensor with such light-emitting section and to a smoke detection system with such photo-electric smoke sensor. The light-emitting section according to the present invention is fitted with: a light-emitting element generating a high brightness checkup light, the brightness distribution of which is adjustable; a reflecting section collecting a checkup light from the light-emitting element to the detection area; a orifice passing a checkup light, travelling to the detection area, and removing the light scattered to areas, other than the detection area; and the light screening section screening a light, scattered to areas, other than the detection area. The light-emitting element is fitted with a light source emitting a high brightness checkup light, and parabolic reflecting mirror the cambered surface of which is installed so that the light from light source is reflected and became a checkup light sent to the detection area. The cambered surface of the parabolical reflecting mirror is installed so that it reflects the checkup light, generally, of the round shape, and to reflect a light of the toroidal form, in which the circle centre is relatively dark, and the rim is bright.

EFFECT: invention allows to detect a smoke with high precision.

9 cl, 12 dwg