The invention discloses a railway wagon derailment automatic brake valve cock handle closing fault detection method, and belongs to the technical field of railway wagon part detection. The problems that an existing method for detecting closing of a cock handle of an automatic brake valve is low in accuracy and template matching cannot achieve detection are solved. The method comprises steps: aftera handle image is obtained, calculating a direction code image for a template and a search area image according to a direction code; obtaining a direction code histogram by calculating the occurrencefrequency of each direction code; determining the matching similarity according to the maximum overlapping ratio between the histogram of the search area image and the histogram of the template; whenthe similarity is greater than a similarity threshold, taking a pixel point as a candidate matching point, selecting a point with the maximum similarity from all the candidate matching points as a final matching point; then calculating a rotation angle of the search area image relative to the template, and comparing the rotation angle with a threshold to realize detection of a closing fault. Themethod is mainly used for handle closing fault detection.
一种铁路货车脱轨自动制动阀塞门手把关闭故障检测方法,属于铁路货车部件检测技术领域。为了解决现有的检测自动制动阀塞门手把关闭的方法存在准确率较低的问题以及模板匹配不能实现检测的问题。本发明获取对手把图像后,按照方向码对模板和搜索区域图像计算方向码图像,通过统计每个方向码出现的频率得到方向码直方图,根据搜索区域图像的直方图和模板的直方图之间的最大重叠比率,确定匹配的相似度,当其大于相似度阈值时,将此像素点作为候选匹配点,再在所有候选匹配点中选择具有最大相似度的点作为最终匹配点,然后计算搜索区域图像相对于模板的旋转角度,并与阈值进行比较实现关闭故障的检测。主要用于手把关闭故障检测。
Railway wagon derailment automatic brake valve cock handle closing fault detection method
一种铁路货车脱轨自动制动阀塞门手把关闭故障检测方法
04.12.2020
Patent
Elektronische Ressource
Chinesisch
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