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Object detection of artifact threaded hole based on Faster R-CNN 被引量:2
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作者 ZHANG Zhengkai QI Lang 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2021年第1期107-114,共8页
In order to improve the accuracy of threaded hole object detection,combining a dual camera vision system with the Hough transform circle detection,we propose an object detection method of artifact threaded hole based ... In order to improve the accuracy of threaded hole object detection,combining a dual camera vision system with the Hough transform circle detection,we propose an object detection method of artifact threaded hole based on Faster region-ased convolutional neural network(Faster R-CNN).First,a dual camera image acquisition system is established.One industrial camera placed at a high position is responsible for collecting the whole image of the workpiece,and the suspected screw hole position on the workpiece can be preliminarily selected by Hough transform detection algorithm.Then,the other industrial camera is responsible for collecting the local images of the suspected screw holes that have been detected by Hough transform one by one.After that,ResNet50-based Faster R-CNN object detection model is trained on the self-built screw hole data set.Finally,the local image of the threaded hole is input into the trained Faster R-CNN object detection model for further identification and location.The experimental results show that the proposed method can effectively avoid small object detection of threaded holes,and compared with the method that only uses Hough transform or Faster RCNN object detection alone,it has high recognition and positioning accuracy. 展开更多
关键词 object detection threaded hole deep learning region-based convolutional neural network(Faster R-CNN) Hough transform
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Exploration and determination of the principles of rotary-percussive underground slimhole drilling 被引量:1
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作者 Shadrina Anastasija Saruev Lev 《International Journal of Mining Science and Technology》 SCIE EI 2014年第2期245-249,共5页
A possibility of the efficient use of rotary percussive drilling to provide drilling smaller diameter holes(40–70 mm) both in mining and prospecting is disclosed herein. A new construction designed for the nipple thr... A possibility of the efficient use of rotary percussive drilling to provide drilling smaller diameter holes(40–70 mm) both in mining and prospecting is disclosed herein. A new construction designed for the nipple thread connection is described. The relative amplitude variation, change of power pulse time and energy in their propagation throughout the drilling tool are determined. A possibility of the efficient power pulse transfer along the drill string to the rock destruction tools with new nipple connections which allow automating the make-up and breakout system of drill pipe was supported by experiments. 展开更多
关键词 Rotary-percussive drilling Smaller diameter holes Drill string Nipple thread connection Power pulse Percussive energy
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