Research of the Equipment Self-Calibration Methods for Different Shape Fertilizers Particles Distribution by Size Using Image Processing Measurement Method

Abstract

The fourth digital revolution of industry makes substantive changes to the rate and methodology of work performance. Machines and robots do the majority of work in robotized and automated factories, while people only supervise them. After an increase of production efficiency, quality control became a critical point. Therefore, quality control systems of computer visions are increasingly installed. The branch of chemical industry requires measurements of quality at as great a frequency as possible. Consequently, indirect measurements are effectively used at this point. This research presents the method of indirect particle measurement. Particles are measured using digital image processing. The algorithm is used for particle measurement to automatically adjust the measurement results. Numerical intelligence is added to the algorithm to increase the accuracy of correction results. The research deals with the problem of matching the results of indirect measurements and the results of the control equipment. For data analysis, fertilizer diameter, mean diameter, aspect ratio, symmetry, sphericity, convexity and some other parameters are used. The mismatch of the artificial neural network results with the control equipment results is slightly higher than 1%.

Research of the Operator’s Advisory System Based on Fuzzy Logic for Pelletizing Equipment

“…Indirect measurement shortens the duration of analysis from a few hours to several minutes [45]. The duration of analysis also depends on the number of pellets in the sample.…”

“…Measurements were made under the real production conditions. Special equipment was used for pellet measurements (more info about measurement was submitted in the previous paper [45]; the measuring system is shown in Figure 2). Ammonia gas and nitric acid, resulting in ammonium nitrate solution, are used for the production of ammonium nitrate.…”

“…The statistical parameters of granules size and vibrations of the melt feeding system was used to create the advisory system. It should be noted that pellet measurement calibration and mathematical models were used in the previous publication [45]. The model for indirect particle measurements was based on the evaluation of particle roundness.…”

Method for Volume of Irregular Shape Pellets Estimation Using 2D Imaging Measurement

“…Such methods of pellet shape evaluation are used with silhouette contour approximation using ellipses [34], because this geometric shape allows for better evaluation of roundness of the pellet, when compared to a circle shape. The ellipse contour provides information about longitudinal and transverse dimensions.…”

Introduction to Special Issue on Symmetry in Mechanical Engineering

“…In the paper [4], the authors presented an approach for the active control of structural vibration. The authors of the paper [5] presented an approach to the correction of optical measurement results of fertilizer particles. Fault diagnosis of the rolling bearing using vibration signals was presented in [6].…”