图学学报 ›› 2023, Vol. 44 ›› Issue (1): 88-94.DOI: 10.11996/JG.j.2095-302X.2023010088
收稿日期:
2022-04-27
修回日期:
2022-07-05
出版日期:
2023-10-31
发布日期:
2023-02-16
通讯作者:
赵军
作者简介:
谷雨(1996-),男,硕士研究生。主要研究方向为计算机视觉、深度学习。E-mail:2378209338@qq.com
基金资助:
Received:
2022-04-27
Revised:
2022-07-05
Online:
2023-10-31
Published:
2023-02-16
Contact:
ZHAO Jun
About author:
GU Yu (1996-), master student. His main research interests cover computer vision and deep learning. E-mail:2378209338@qq.com
Supported by:
摘要:
列车闸瓦钎及闸瓦状态正常与否对于货运列车安全运行极其重要,为此提出了一种改进的SSD目标检测算法,对货运列车闸瓦钎及闸瓦的缺失进行检测。首先将深度可分离卷积模块引入ResNet50网络模型,使其参数数量减少约50%,以提高检测效率。其次,将改进后的ResNet50网络模型替换SSD中的VGG16网络,以改善SSD网络模型的特征提取能力。然后利用高、低层特征融合的方法,将网络中Conv5_3和Conv7_2分别与Conv4_6和Conv6_2进行特征融合,提高检测精度。最后通过自建的货运列车制动部件缺失数据集对网络进行训练获取比较准确的网络权重。实验结果表明,改进后的SSD算法在闸瓦钎丢失检测中准确率达到96.85%,召回率达到89.50%;在闸瓦丢失检测中准确率达到97.01%,召回率达到97.01%,可以满足列车闸瓦钎及闸瓦缺失检测需求。
中图分类号:
谷雨, 赵军. 列车闸瓦钎及闸瓦故障图像检测算法研究[J]. 图学学报, 2023, 44(1): 88-94.
GU Yu, ZHAO Jun. Research on image detection algorithm of freight train brake shoe bolt and brake shoe fault[J]. Journal of Graphics, 2023, 44(1): 88-94.
层数 | 输出尺寸 | 结构、类型 |
---|---|---|
Conv 1 | 150×150 | 7×7, 64, s2 |
Pool 1 | 75×75 | 3×3, max, s2 |
Conv 2 | 75×75 | |
Conv 3 | 38×38 | |
Conv 4 | 38×38 | |
Conv 5 | 19×19 |
表1 特征提取网络结构
Table 1 Diagram of residual block
层数 | 输出尺寸 | 结构、类型 |
---|---|---|
Conv 1 | 150×150 | 7×7, 64, s2 |
Pool 1 | 75×75 | 3×3, max, s2 |
Conv 2 | 75×75 | |
Conv 3 | 38×38 | |
Conv 4 | 38×38 | |
Conv 5 | 19×19 |
数据集 | 闸瓦钎 丢失 | 闸瓦钎 正常 | 闸瓦 丢失 | 闸瓦钎 正常 |
---|---|---|---|---|
训练集 | 981 | 1359 | 479 | 1917 |
测试集 | 109 | 155 | 51 | 213 |
总计 | 1090 | 1514 | 530 | 2130 |
表2 实验数据集种类及数量
Table 2 Category and quantity of experimental data sets
数据集 | 闸瓦钎 丢失 | 闸瓦钎 正常 | 闸瓦 丢失 | 闸瓦钎 正常 |
---|---|---|---|---|
训练集 | 981 | 1359 | 479 | 1917 |
测试集 | 109 | 155 | 51 | 213 |
总计 | 1090 | 1514 | 530 | 2130 |
特征提取网络 | 分类准确度(%) | |
---|---|---|
闸瓦钎丢失 | 闸瓦丢失 | |
MobileNet | 88.00 | 94.25 |
ResNet50 | 88.17 | 96.18 |
ResNet50dw | 88.33 | 96.91 |
表3 基础网络分类准确率对比实验结果
Table 3 Comparative experimental results of backbone
特征提取网络 | 分类准确度(%) | |
---|---|---|
闸瓦钎丢失 | 闸瓦丢失 | |
MobileNet | 88.00 | 94.25 |
ResNet50 | 88.17 | 96.18 |
ResNet50dw | 88.33 | 96.91 |
算法模型 | 闸瓦丢失(%) | 闸瓦钎丢失(%) | 单幅图像 平均检测用时(ms) | ||
---|---|---|---|---|---|
精确度 | 召回率 | 精确度 | 召回率 | ||
Faster-RCNN | 91.49 | 98.47 | 80.95 | 85.04 | 85.26 |
YOLOv3 | 93.64 | 78.63 | 96.66 | 85.76 | 27.09 |
VGG16-SSD | 86.79 | 95.83 | 91.67 | 84.62 | 16.67 |
ResNet50-SSD | 94.19 | 95.29 | 94.40 | 87.62 | 20.08 |
ResNet50-SSD+feature fusion | 96.57 | 97.76 | 96.48 | 90.09 | 28.06 |
改进后SSD | 97.01 | 97.01 | 96.85 | 89.50 | 19.13 |
表4 6种检测网络效果对比
Table 4 Comparison of six detection network
算法模型 | 闸瓦丢失(%) | 闸瓦钎丢失(%) | 单幅图像 平均检测用时(ms) | ||
---|---|---|---|---|---|
精确度 | 召回率 | 精确度 | 召回率 | ||
Faster-RCNN | 91.49 | 98.47 | 80.95 | 85.04 | 85.26 |
YOLOv3 | 93.64 | 78.63 | 96.66 | 85.76 | 27.09 |
VGG16-SSD | 86.79 | 95.83 | 91.67 | 84.62 | 16.67 |
ResNet50-SSD | 94.19 | 95.29 | 94.40 | 87.62 | 20.08 |
ResNet50-SSD+feature fusion | 96.57 | 97.76 | 96.48 | 90.09 | 28.06 |
改进后SSD | 97.01 | 97.01 | 96.85 | 89.50 | 19.13 |
图8 原SSD算法与改进后SSD算法在数据集上检测对比((a)闸瓦钎故障捡漏SSD算法;(b)本文算法准确检出)
Fig. 8 Comparison of detection effect of original SSD and improved SSD ((a) The original SSD algorithm for brake shoe bolt fault detection; (b) Algorithm of this paper for accurate detection)
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