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Propeller blade width measurement has been extensively studied in the past using direct and indirect methods, and it plays a great role in determining the quality of the finished products. It has surveyed that previous techniques are usually time-consuming and erroneous due to a large number of points to be processed in blade width measurement. This paper proposes a new method of measuring blade width using two images acquired from different viewpoints of the same blade. And a new feature points matching approach for propeller blade image is proposed in stereo vision measurement. Based on these, pixel coordinates of contour points of the blade in two images are extracted and converted to real world coordinates by image algorithm and binocular stereo machine vision theory. Then, from the real world coordinates, the blade width at any position can be determined by simple geometrical method. 相似文献
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多岛遗传算法在螺旋桨优化设计中的应用 总被引:1,自引:0,他引:1
文章将优化算法应用在螺旋桨的设计中。通过建立数学模型对螺旋桨推进效率进行寻优。以影响螺旋桨推进效率的主要因素(桨叶数、直径大小、螺距比、盘面比)作为变量,进行数学建模,用多岛遗传算法(MIGA)对螺旋桨的推进效率进行优化。这样改变螺旋桨的一部分参数就能直接得到最佳效率下的其他参数,而不需要进行繁琐的螺旋桨敞水性能图谱设计,对现代螺旋桨的设计有实用价值。 相似文献
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