The Research Of Digital Image Processing Technology To Measure The Weight Of Bulk Material On Conveyor Belt

Engineering field and actual life, often have some irregular or shape for the arbitrary formative large material requires measuring its volume. For example, in the process of mining coal pile on the conveyor. Generally the conveyor belt coal in great volume, measuring the volume, difficult to measure accurately, sometimes even difficult to realize. In the past the traditional measuring method, slow, to work hard, time-consuming, and on the analysis of the existing process of certain difficulties. Therefore, a quick, effective and simple, low labor strength measurement instrument, the method of volume to enhance work efficiency and reduce the measurement work strength has important significance.This paper proposes a by cameras, computer, conveyor etc system, this system is based on digital image processing technology to measure the volume of the coal conveyor belt.This paper firstly established the camera calibration, after the geometric model camera by Tsai altogether pastry linear calibration method identified the camera external parameters and internal parameters. After camera calibration image collection, will the space objects 3d information conversion digital image processing 2d information.In the process of image processing, image enhancement and binary processing. Image enhancement USES the noise smooth processing and edge detection method, through median filtering method is smooth image, overcome blurring, eliminate noise. The stage in edge detection, we used Sobel operator better retained the edge, and smooth noise, reducing the noise sensitivity, achieve good edge detection effect. By Otsu binary is simple algorithm quickly the binary image processing.Finally, the calculation of the spontaneous conveyor belt, establish the coal when volume mathematical model based on improved, first the Freeman chain code section of vector method to get the coal area, in this process, we need in calculating the chain code for image before border re-sampling lest chain code is too long and reducing the noise of chain code, then the, the starting point of the normalized processing. So after that section area in coal, according to the double integral volume calculation formula of the spontaneous volume on solving the conveyor belt.This paper is the use of video cameras to establish a model of the spontaneous, test of a conveyor belt volume. Simulation shows that in the process of the test existing error are small, anti-jamming performance is better, and the experiment of real-time better, can real-time to each image measurement. According to the volume of the coal belt, we offer measurement based on digital image processing techniques on the conveyor belt coal measure scheme for the volume of the other big bulk material area or volume measurement puts forward the means of measurement.