立井提升系统刚性罐道故障诊断方法

Fault diagnosis method for rigid guides in vertical shaft hoisting systems

  • 摘要: 刚性罐道是立井提升系统的关键部件,由于井筒形变、钢材锈蚀等原因易发生故障,影响罐笼正常运行。目前罐道故障诊断多采用振动检测法,诊断精度易受罐笼载荷、运行速度等工况影响。针对该问题,采用涡流传感器采集罐道故障信号,可使信号特征不受罐笼运行环境影响。为提高罐道故障识别准确率,提出一种基于残差学习和注意力机制的一维卷积神经网络(RA1DCNN)。该网络通过多尺寸卷积并行运算提取多尺度特征,增强了对不同尺度信号特征的感知能力;引入通道注意力模块和空间注意力模块,并融合残差学习机制,设计了残差注意力模块,可同时获取通道和空间信息特征,提取到更具判别性的特征。搭建罐道故障实验平台模拟不同类别及不同严重程度的罐道故障,对RA1DCNN进行消融实验和对比实验,结果表明:RA1DCNN对罐道故障类别的识别准确率达100%,对间隙故障严重程度的平均识别准确率为99.7%,对错位故障严重程度的平均识别准确率为97.68%,验证了多尺度卷积层和残差注意力模块的有效性;整体故障识别准确率为98.05%,优于一维卷积神经网络等对比模型。

     

    Abstract: Rigid guide is a key component of vertical shaft hoisting systems. Due to shaft deformation and steel corrosion, faults are likely to occur, affecting the normal operation of the cage. At present, vibration detection methods are mostly used for rigid guide fault diagnosis, but the diagnostic accuracy is easily affected by operating conditions such as cage load and running speed. To address this problem, eddy current sensors are used to collect fault signals of the rigid guides, ensuring that the signal features are not affected by the cage's operating environment. To improve the accuracy of rigid guide fault identification, Residual Attention One-Dimensional Convolutional Neural Network (RA1DCNN) was proposed. The network extracted multi-scale features through parallel multi-scale convolutions, enhancing its ability to perceive signal features at different scales. Channel attention and spatial attention modules were introduced and combined with the residual learning mechanism to design a residual attention module, which simultaneously captured channel and spatial feature information, extracting more discriminative features. An experimental platform for rigid guide faults was established to simulate different types and severities of rigid guide faults. Ablation experiments and comparative experiments were conducted on RA1DCNN. The results showed that the RA1DCNN achieved 100% accuracy in identifying rigid guide fault categories, an average accuracy of 99.7% in identifying the severity of clearance faults, and an average accuracy of 97.68% in identifying the severity of misalignment faults, verifying the effectiveness of the multi-scale convolution layers and residual attention module. The overall fault identification accuracy reached 98.05%, outperforming comparative models including one-dimensional convolutional neural networks.

     

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