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图学学报 ›› 2024, Vol. 45 ›› Issue (5): 979-986.DOI: 10.11996/JG.j.2095-302X.2024050979

• 图像处理与计算机视觉 • 上一篇    下一篇

基于改进YOLOv8与语义知识融合的金具缺陷检测方法研究

李刚1,2(), 蔡泽浩1, 孙华勋3, 赵振兵2   

  1. 1.华北电力大学计算机系,河北 保定 071003
    2.复杂能源系统智能计算教育部工程研究中心,河北 保定 071003
    3.中国华电集团有限公司,北京 100031
  • 收稿日期:2024-06-10 修回日期:2024-09-05 出版日期:2024-10-31 发布日期:2024-10-31
  • 第一作者:李刚(1980-),男,副教授,博士。主要研究方向为电力人工智能、电力视觉。E-mail:ququ_er2003@126.com
  • 基金资助:
    国家自然科学基金项目(61871182);国家自然科学基金项目(U21A20486)

Research on defect detection of transmission line fittings based on improved YOLOv8 and semantic knowledge fusion

LI Gang1,2(), CAI Zehao1, SUN Huaxun3, ZHAO Zhenbing2   

  1. 1. Department of Computer, North China Electric Power University, Baoding Hebei 071003, China
    2. Engineering Research Center of Intelligent Computing for Complex Energy Systems, Ministry of Education, Baoding Hebei 071003, China
    3. China Huadian Group Co., Ltd., Beijing 100031, China
  • Received:2024-06-10 Revised:2024-09-05 Published:2024-10-31 Online:2024-10-31
  • First author:LI Gang (1980-), associate professor, Ph.D. His main research interests cover AI for power system and electric power vision. E-mail:ququ_er2003@126.com
  • Supported by:
    National Natural Science Foundation of China(61871182);National Natural Science Foundation of China(U21A20486)

摘要:

针对输电线路螺栓金具缺陷检测任务中存在的缺陷样本类间分布不均、缺陷微小特征提取困难等问题,提出基于改进YOLOv8和语义知识融合的输电线路螺栓缺陷检测方法。首先,通过深入分析数据样本中螺栓金具缺陷种类与该螺栓承载金具种类之间的关系,完成语义关联构建工作;之后,在YOLOv8模型Neck部分引入BiFusion和RepBlock模块,增强模型的特征提取能力;其次,使用改进的融合语义知识校正权重的Loss函数,进一步提高训练模型的准确性,减少误检的发生;最后,分别完成基线选取实验、消融实验、超参数调整实验以及对比实验。实验结果表明,相较于Baseline模型,改进YOLOv8方法在平均精确率(mAP)上提升了4.0%,在关键少样本类精确率上提升了24.6%,可有效提高输电线路螺栓金具缺陷检测的效果,该语义关联构建及语义知识融合方法具有一定的泛用性,为输电线路无人机智能巡检领域提供了新的方法支持。

关键词: 无人机巡检, 输电线路金具, 螺栓缺陷检测, 语义信息融合, YOLOv8

Abstract:

To address issues such as the uneven distribution of defect samples among classes and the difficulty in extracting tiny features of defects in the task of detecting defects of transmission line bolts and fixtures, a defect detection method for transmission line bolts and fixtures was proposed based on the improvement of YOLOv8 and semantic knowledge fusion. First, the semantic correlation was established by analyzing the relationship between the defective types of bolt fittings in the data samples and the types of fittings carried by that bolt. Then, the BiFusion and RepBlock modules were introduced into the Neck part of the YOLOv8 model to enhance its feature extraction capability. Second, the Loss function of the weights was corrected using an improved fusion of semantic knowledge, further improving the accuracy of the training model and reducing the occurrence of misdetection. Finally, baseline selection experiments, ablation experiments, hyper-parameter experiments, and comparative experiments were conducted, respectively. The experimental results showed that compared with the Baseline model, the improved YOLOv8 method increased the mean average precision (mAP) by 4.0% and improved the accuracy of the key less sample classes by 24.6%, effectively enhancing the defect detection performance for transmission line bolted fittings. The proposed semantic correlation establishment and semantic knowledge fusion method also demonstrated a certain degree of generalizability, providing new methodological support for UAV-based intelligent inspection of transmission lines.

Key words: UAV inspection, transmission line fittings, bolt defect detection, semantic information fusion, YOLOv8

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