Multi-Resolution Fusion Convolutional Neural Network for Screw Locking Series

doi:10.7652/xjtuxb202003020

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Multi-Resolution Fusion Convolutional Neural Network for Screw Locking Series

更新时间：2025-07-09

- Multi-Resolution Fusion Convolutional Neural Network for Screw Locking Series
- Vol. 54, Issue 3, Pages: 161-168+178(2020)
- 作者机构：
  
  太原理工大学大数据学院,太原,030024
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202003020
  CLC： TP183
- Online First：10 March 2020，
  
  Published：2020
- 稿件说明：
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Multi-Resolution Fusion Convolutional Neural Network for Screw Locking Series[J]. 2020, 54(3): 161-168+178.
DOI：

Multi-Resolution Fusion Convolutional Neural Network for Screw Locking Series[J]. 2020, 54(3): 161-168+178. DOI： 10.7652/xjtuxb202003020.

摘要

为了准确识别螺丝锁附是否发生故障和具体故障类型

提出了一种多分辨率融合卷积神经网络。使用原始序列数据作为输入以提高识别速度和精度; 为了提取多尺度特征

分别在分辨率(数据长度)为4 000、2 000和1 000的特征向量上进行一维卷积运算; 在Fusion层通过上采样、下采样和1×1卷积等策略

将各分辨率特征向量融合得到3组新特征向量

使得该网络能够获得锁附序列的整体和局部特征信息; 在输出层使用类别加权交叉熵(CWCE)损失

通过为损失函数设置惩罚系数来加大对样本较少类别的惩罚力度

缓解了各类别数据不平衡的问题。收集了3 149条螺丝锁附序列

并在该数据集上进行了实验

结果表明:在6分类实验中

所提方法的准确率为96.00%

宏F1为93.93%

均高于其他方法; 在2分类实验中

所提方法的准确率为99.36%

CWCE损失的有效性得到了验证; 所提方法能够有效地判别锁附故障

并具有较好的实时性。

Abstract

For identifying whether a screw locking fault occurs and its type accurately

a multi-resolution fusion convolutional neural network is proposed. To improve recognition rate and accuracy

the network uses original series data as the input. To extract multi-scale features

1-D convolutional operation is performed on the feature maps with resolutions(data length)of 4 000

2 000 and 1 000

respectively. In the Fusion layer

the resolution feature maps are fused by upsample

downsample and 1-1 convolution to obtain three sets of new feature maps

so that the network can obtain the global and local information of locking series. In output layer

class weighted cross entropy(CWCE)loss is used to alleviate the issue of unbalanced data in different classes by setting a penalty coefficient for loss function to strengthen the punishment for small sample categories. 3 149 screw locking series datasets are collected

and experiments are performed on this dataset. In the experiments of six categor

关键词

Keywords

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