Design and verification of intelligent bamboo fragmentation system based on machine vision
[Objective]The process of bamboo splitting is a crucial step that affects the yield rate of bamboo materials.To address the individual characteristics of bamboo segments,such as varying diameters,uneven wall thickness,and inconsistent roundness,we propose an intelligent splitting method based on machine vision to improve the yield rate of bamboo materials.[Method]Based on the natural characteristics of bamboo segments and the requirements of bamboo breaking technology,the calculation model of wood yield was established on the basis of the real cross-section outline of bamboo segments and the number of cutter segments as constraints.By using an industrial camera to capture cross-sectional images of bamboo sections,a multi-scale detail enhancement algorithm was introduced based on the Canny operator to eliminate interference information between the inner and outer diameters of the bamboo image.The dual thresholds were adaptively obtained by integrating iterative thresholds and gradient histogram analysis to improve the robustness of bamboo section contour extraction.Using boundary sorting growth algorithm to quickly calculate the maximum inscribed rectangle of sliced bamboo.Conduct production testing and verification on intelligent bamboo breaking machine.[Result]The improved contour extraction algorithm effectively removed pseudo-edge features from bamboo material images and obtains complete edge contour features with an average error between calculated inner/outer diameters and actual sizes at 0.9%.Under random initial splitting angles,our method showed an average deviation from maximum yield rate at 1.3%,which was lower than 6.3%for circular model or 1.6%for elliptical model.Through production experiments,it is verified that the average yield of the intelligent segmentation system based on machine vision can reach about 73%,which is higher than the yield of traditional breaking machines.[Conclusion]The intelligent segmentation system based on machine vision designed can quickly obtain the true cross-sectional profile of bamboo segments,accurately determine the number of segmentation parts,and effectively improve the utilization rate of bamboo.
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