Detection method based on improved faster R-CNN for pin defect in transmission linesJun Wu, Sheng Cheng, Shangzhi Pan, Wei Xin, Liangjun Bai, Liang Fan and Xiaohu DongE3S Web Conf., 300 (2021) 01011DOI: https://doi.org/10.1051/e3sconf/202130001011