METHOD FOR DETECTING OPEN FLAME (EMBODIMENTS) AND DEVICE THEREFOR

摘要

Open flame detection method (embodiments) and device therefor relates to measuring technology, in particular, to flame detectors, when burning in the control area with recognition of solar radiation and welding radiation.The engineering problem involves creation of the open flame detection methods and device allowing to reduce the risk of false alarm on account of difference in radiation of close and remote flame of solar radiation, electric-arc and gas welding and artificial light sources and enhancement of optical interference protection and improvement of the capability to detect real flame in the control area without reference to distance.The proposed invention is based on the first time proposed capability to detect open flame additionally by the signal analysis received after deduction of the compensating channel signal amplitude from the main channel signal amplitude and respectively entering into the flame detection device of the subtracting channel. Besides, with reference to the second embodiment separation of pulses typical of flame and interference by means of controllable band pass filters by the second frequency band is unobvious in terms of the common knowledge with reference to the third embodiment-elimination of interference by means of the envelope.So, the technical result achieved by said invention is not determined by known influence of distinguished features and cannot be predicted using the information comprised in the prior art.