Chinese Journal of Ship Research, Volume. 20, Issue 2, 140(2025)
Operation standardization evaluation method based on improved YOLOv8n for ship equipment disassembly and assembly
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Table 1. Evaluation of membership grade table
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评价 评估隶属度 20分 40分 60分 80分 100分 非常熟练 0 0 0 0.2 0.8 熟练 0 0 0.2 0.8 0 一般 0 0.2 0.6 0.2 0 差 0 0.8 0.2 0 0 较差 0.8 0.2 0 0 0
Table 2. Pseudo-code for the overall algorithm of this paper
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Algorithm 1: 拆装流程规范性评估算法Input : 拆装视频DoperationOutput : 零件拆装流程评分G'1: Initialization 2: (1) 确定拆装流程评估的关键因素集及评价集B 3: (2) 初始化目标检测模型 4: Procedure 5: (1)设备拆装流程识别 6: for i = 1 to n do 7: Obji←Detect(Improved YOLOv8n, Doperation(i))//识别零件i 8: Ooperation(i)←Determine{Obji, Objpump}//辨识拆装顺序 9: end 10: (2)拆装流程评估 11: W ←AHP&EWM//确定拆装关键因素权重集12: for i = 1 to n do 13: R ←Estimate{ Ooperation(i), Bi}//根据评价集得到隶属度矩阵14: end 15: G'←
U ×[20 40 60 80 100]T←W ×R //根据式（11）与式（12）得到评价结果并转化为百分制16: Return G'
Table 3. Comparative experiments of different attentional mechanisms
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模型 评价指标 Pr Re Map @0.5 Pa×106 Gf×109 YOLOv8n[ 24 ]0.740 0.76 0.80 3.01 8.1 v8n-CBAM[ 31 ]0.890 0.79 0.88 3.12 8.2 v8n-CoTA[ 32 ]0.890 0.60 0.81 4.00 10.1 v8n-CA[ 33 ]0.900 0.79 0.85 3.02 8.1 v8n-MHSA[ 34 ]0.801 0.77 0.82 3.01 8.1 本文SA注意力 0.910 0.63 0.93 3.04 8.3
Table 4. Ablation experiment
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模型 评价指标 Pr Re Map @0.5 Pa×106 Gf×109 v8n[ 24 ]0.74 0.76 0.80 3.01 8.1 v8n-S 0.91 0.63 0.93 3.05 8.3 v8n-W 0.71 0.82 0.78 3.01 8.1 v8n-G 0.83 0.77 0.80 2.98 8.1 v8n-SW 0.82 0.81 0.94 3.05 8.3 v8n-SG 0.78 0.79 0.94 3.03 8.3 v8n-GW 0.92 0.78 0.88 2.98 8.1 本文方法 0.92 0.81 0.95 3.03 8.3
Table 5. Comparative experiment
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模型 评价指标 Pr Re Map @0.5 Pa×106 Gf×109 YOLOv5n[ 35 ]0.84 0.81 0.79 1.77 4.2 YOLOv5s[ 35 ]0.91 0.77 0.78 7.03 15.8 YOLOv7[ 36 ]0.93 0.78 0.79 36.5 104.7 YOLOv8n[ 24 ]0.74 0.76 0.80 3.01 8.1 YOLOv8s[ 24 ]0.71 0.81 0.80 11.2 28.6 YOLOv8x[ 24 ]0.83 0.76 0.78 68.2 257.8 本文方法 0.92 0.81 0.95 3.03 8.3
Table 6. Disassembly and assembly process identification experiment
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正确流程 视频动作 动作时间帧 序号 实时检测 视频动作 动作时间帧 序号 拆卸端盖 3 676 拆卸端盖 3 730 拆卸1个轴承套 3 898 拆卸1个轴承套 4 013 拆卸主动轴 4 045 拆卸主动轴 4 172 拆卸从动轴 4 298 拆卸从动轴 4 196 拆卸2个轴承套 4 366 拆卸2个轴承套 4 426 安装1个轴承套 4 415 安装1个轴承套 4 679 安装主动轴 4 572 安装从动轴 4 789 安装从动轴 4 662 安装主动轴 4 803 安装2个轴承套 4 848 安装2个轴承套 4 931 安装端盖 5 002 安装端盖 5 103
Table 7. Historical disassembly data
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样本编号 对应指标 A1 A2 A3 A4 A5 1 3679 163 1 1 647 2 3730 126 1 0 307 3 3582 151 1 1 453 4 3665 148 0 1 525
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Zhendong ZHANG, Cong GUAN, Zehui ZHANG, Chao WU, Xuewen DING. Operation standardization evaluation method based on improved YOLOv8n for ship equipment disassembly and assembly[J]. Chinese Journal of Ship Research, 2025, 20(2): 140
Paper Information
Category: Ship Intelligent O&M, and Fault Diagnosis
Received: Apr. 28, 2024
Accepted: --
Published Online: May. 15, 2025
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