Power plant coal conveying belt deviation monitoring and early warning device and method

The invention discloses a power plant coal conveying belt deviation monitoring and early warning device and method. The device comprises a visual camera fixedly installed right above the middle of a belt and used for photographing and collecting a position image of the belt during operation in real time, laser range finders evenly distributed and fixedly installed on the two sides of the belt andused for monitoring the distance between the edges of the belt and the laser range finders in real time, an early warning device installed on a belt conveying line production site and used for sendingout early warning information when the belt deviates, and a main controller connected with the visual camera, the laser range finders and the early warning device, wherein the main controller is usedfor presetting reference position lines of the edges of the two sides of the belt in the image, carrying out noise reduction and enhancement on edge position images, detecting and positioning the actual edge positions of the b