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主要介绍使用机器视觉非接触测量外螺纹尺寸系统,测量矿山钻孔所用的钻杆接头外螺纹加工尺寸,以及如何通过定制化的工装夹具来实现接头的定位旋转拍照采图,从而实现对矿山钻孔所用钻杆接头加工完后自动检验接头尺寸的技术。本视觉检测系统主要是由工业相机,高倍远心镜头,平面光源及机器视觉软件平台组成。具体原理是通过工业相机采集钻杆接头各个位置的照片,测量整个接头螺纹的尺寸。再由机器视觉软件平台,用C++语言定制开发的视觉灰度值算法进行计算,进而实现非接触自动测量螺纹加工后的尺寸,实现外螺纹加工后尺寸是否合格的无人化检验作业。 相似文献
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Comprehensive analysis of safe mining to heavy and steep coal seam under complex geophysics environment 总被引:1,自引:1,他引:0
In virtue of effect of N-S intensive ground stress and mining disturbance to +579E2EB1+2 mining site at Weihuliang Mine, the dip angle and section height is 65° and 52 m, respectively, the collapses happed frequently
during mining. Firstly, mining conditions, spatial structure and parameters were investigated. Then physical simulation and
dynamic numerical tracing and elaborate simulation relating roof and top-coal were applied based on 2D-Block Program and quantitative
regularity of stress at variable depths had been estimated. Furthermore, it was manifested that effective measures, i.e.,
fast mining, control symmetrical top-coal-caving at dip and strike directions, optimizing ventilation system, active-stereo
preventing gas were performed successfully in mining practice. Ultimately, the derived dynamic hazard were prevented so as
to safety mining.
Supported by the National Natural Science Foundation of China(10402033, 10772144) 相似文献
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近年来,高速包装业的迅猛发展使得印刷品对耐磨性能的需求越来越高,尤其是烟包,由于高速运行的包装机械对烟盒外表面的摩擦力很大,因此很容易造成油墨脱色的问题产生.虽然国内外曾通过添加耐摩擦剂和上光油等方式在一定程度上缓解了油墨掉色问题,但由于成本高、工序繁杂等缺点,使得该问题一直作为印刷行业的重点研究对象. 相似文献
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针对钢筋混凝土结构在服役过程中钢筋锈蚀以及承受往复荷载工况下引起的钢筋混凝土材料耐久性能劣化会对钢筋混凝土间的粘结性能产生影响,设计并制作了48根粘结区带裂缝的钢筋混凝土梁式试件,以研究在承受不同往复荷载工况(往复荷载幅度分别为极限荷载的0%、10%、20%及30%)、四种钢筋锈蚀率(0%、3%、5%及7%)以及往复荷载与钢筋锈蚀耦合工况下钢筋与混凝土粘结性能的变化情况。结果表明:钢筋锈蚀会影响试件破坏状态;施加往复荷载过程中残余滑移的增长主要发生在前六个循环,且残余滑移随着钢筋锈蚀率以及往复荷载幅度的增加而增大;耦合工况会进一步促进粘结性能的劣化,且粘结强度损失率随着钢筋锈蚀率和往复荷载幅度的增加而增大。该研究可为对应工况下钢筋混凝土构件的现状评估提供理论参考依据。 相似文献