Patent ID: 7991187

Claim:
An intelligent image smoke/flame sensor, comprised of an image sensor, a DSP processor, an input/output circuit, an infrared lamp and filter assembly, a casing, a window glass, a front cover, and a rear cover, said DSP processor providing an operation algorithm of statistics of t time serial image characteristics matching and probability fusion calculation, which includes the steps of: (i) the system picks up a length L of serial images for at t time; (ii) the system makes sure of fixed background characteristics by means of self-learning, in which the cycle for long cycle background to be T L and the cycle for short cycle background to be T S ; (iii) the system analyzes the serial images of length m obtained at t time, obtaining the differences and variation between each two images, the differences and variation between each image and the short cycle background image, and the differences and variation between each image and the long cycle background image; (iv) the system calculates every characteristic parameter and matches the calculated characteristic parameters with flame/smoke characteristics, so as to set FCi and SCj to be 1 if the radio of successful matching images reaches a predetermined value or to be −1 if the radio of successful matching images is below the predetermined value; (v) the system starts a first stage data fusion subject to different characteristic weights, thereby obtaining flame probability incremental amount and smoke probability incremental amount to be ΔP F (t) and ΔP S (t) respectively; and (vi) the system starts a second stage data fusion to obtain a fire probability P(t) at t time.