Based on the statics theory, a novel and feasible twice-suspended-mass method(TSMM) was proposed to deal with the seldom-studied issue of fault diagnosis for damping springs of large vibrating screen(LVS). With the st...Based on the statics theory, a novel and feasible twice-suspended-mass method(TSMM) was proposed to deal with the seldom-studied issue of fault diagnosis for damping springs of large vibrating screen(LVS). With the static balance characteristic of the screen body/surface as well as the deformation compatibility relation of springs considered, static model of the screen surface under a certain load was established to calculate compression deformation of each spring. Accuracy of the model was validated by both an experiment based on the suspended mass method and the properties of the 3D deformation space in a numerical simulation. Furthermore, by adopting the Taylor formula and the control variate method, quantitative relationship between the change of damping spring deformation and the change of spring stiffness, defined as the deformation sensitive coefficient(DSC), was derived mathematically, from which principle of the TSMM for spring fault diagnosis is clarified. In the end, an experiment was carried out and results show that the TSMM is applicable for diagnosing the fault of single spring in a LVS.展开更多
提出基于图像识别的地铁车厢显示屏故障检测方法,利用YOLO(You Only Look Once)v5s对地铁车厢显示屏故障进行检测。在YOLOv5s中引入注意力机制,分别增加Shuffle Attention模块和SimAM模块,以提升地铁车厢显示屏故障检测性能。采用图像...提出基于图像识别的地铁车厢显示屏故障检测方法,利用YOLO(You Only Look Once)v5s对地铁车厢显示屏故障进行检测。在YOLOv5s中引入注意力机制,分别增加Shuffle Attention模块和SimAM模块,以提升地铁车厢显示屏故障检测性能。采用图像识别与目标检测技术,所提出的地铁车厢显示屏故障检测方法可以有效代替传统人工巡检,在试验中表现良好。展开更多
基金Project(20120095110001)supported by the PhD Programs Foundation of Ministry of Education of ChinaProject(51134022,51221462)supported by the National Natural Science Foundation of China+1 种基金Project(CXZZ13_0927)supported by Research and Innovation Program for College Graduates of Jiangsu Province,ChinaProject(2013DXS03)supported by the Fundamental Research Funds for Central Universities of China
文摘Based on the statics theory, a novel and feasible twice-suspended-mass method(TSMM) was proposed to deal with the seldom-studied issue of fault diagnosis for damping springs of large vibrating screen(LVS). With the static balance characteristic of the screen body/surface as well as the deformation compatibility relation of springs considered, static model of the screen surface under a certain load was established to calculate compression deformation of each spring. Accuracy of the model was validated by both an experiment based on the suspended mass method and the properties of the 3D deformation space in a numerical simulation. Furthermore, by adopting the Taylor formula and the control variate method, quantitative relationship between the change of damping spring deformation and the change of spring stiffness, defined as the deformation sensitive coefficient(DSC), was derived mathematically, from which principle of the TSMM for spring fault diagnosis is clarified. In the end, an experiment was carried out and results show that the TSMM is applicable for diagnosing the fault of single spring in a LVS.
基金Acknowledgements： This work is supported by National Natural Science Foundation of China （No. 60673084） and Hunan Provincial Natural Science Foundation of China （No. 06JJ4075）.
文摘提出基于图像识别的地铁车厢显示屏故障检测方法,利用YOLO(You Only Look Once)v5s对地铁车厢显示屏故障进行检测。在YOLOv5s中引入注意力机制,分别增加Shuffle Attention模块和SimAM模块,以提升地铁车厢显示屏故障检测性能。采用图像识别与目标检测技术,所提出的地铁车厢显示屏故障检测方法可以有效代替传统人工巡检,在试验中表现良好。
