Electric Power ›› 2020, Vol. 53 ›› Issue (6): 27-33.DOI: 10.11930/j.issn.1004-9649.201910011

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Foreign Body Detection Method for Transmission Equipment Based on Edge Computing and Deep Learning

LU Yanqiao1, SUN Cuiying1, CAO Hongwei2, YAN Hongwei2   

  1. 1. State Grid Hebei Electric Power Research Institute, Shijiazhuang 050021, China;
    2. Shijiazhuang Power Supply Branch of State Grid Hebei Electric Power Co., Ltd., Shijiazhuang 050000, China
  • Received:2019-10-10 Revised:2020-02-10 Published:2020-06-05
  • Supported by:
    This work is supported by State Grid Hebei Electric Power Research Institute Project (Research on Power Grid Equipment Image Recognition and Fault Detection Technology Based on Deep Learning Technology, No.KJKF-20)

Abstract: Various foreign bodies, such as bird's nests and plastic bags, often appear on transmission equipment. Failure to detect and clean them up in time will cause great potential safety hazards to the transmission system. Therefore, it is necessary to timely detect the presence of foreign bodies on transmission equipment. To solve this problem, a foreign body detection method is proposed based on edge computing and deep learning. Different from the existing method that sends UAV pictures back to the cloud server for processing, this method, by sinking the detection calculation to the edge device, uses the target detection method of Mobilenet and optimized SSD to directly make process calculation in the edge device, and sends the pictures of detected foreign bodies back to the cloud server. The proposed method is about 5 times faster than the VGG-based SSD method and 58 times faster than the Faster-RCNN method in CPU running speed, and 2/9 times of the VGG-based SSD method and 2/29 times of the Faster-RCNN method in model size, with an accuracy of 89%. Compared with the method that sends original data back to the cloud server for processing, the proposed method can reduce the data transmission amount by about 90%. It is concluded that the proposed method can reliably detect foreign bodies on transmission equipment in real time. The detecting system based on this method has been deployed in practice.

Key words: foreign body detection, edge computing, convolutional neural network, Mobilenet, single shot multibox detector(SSD)