光通信技术2025，Vol.49Issue(5)：78-83,6.DOI:10.13921/j.cnki.issn1002-5561.2025.05.014
基于多时频图和注意力机制的Φ-OTDR相似事件识别方法
Recognition method for similar events in Φ-OTDR based on multi-time-frequency diagram and attention mechanism
摘要
Abstract
To enhance the recognition capability of phase-sensitive optical time-domain reflectometer(Φ-OTDR))systems for identifying the radial distance of vibration events,especially under low signal-to-noise ratio(SNR)conditions,a recognition method based on multi-time-frequency maps and an attention mechanism is proposed.This approach employs Mel-spectro-gram transformation and discrete-continuous wavelet transform(CWT)to enhance the time-frequency features of the signal,and constructs a multi-channel SE-ResNet50 network incorporating a channel attention mechanism to adaptively fuse multi-source features.Experimental results demonstrate that the proposed method achieves a recognition accuracy of 98.66%within a radial distance range of 0～9 m for identical events,representing improvements of 5.35%and 3.61%compared to using only Mel-spectrograms or CWT maps,respectively.The method effectively enhances the feature representation and recognition per-formance of Φ-OTDR in complex environments.关键词
相位敏感型光时域反射仪/时频分析/注意力机制/事件识别Key words
phase-sensitive optical time-domain reflectometer/time-frequency analysis/attention mechanism/event recognition分类
信息技术与安全科学引用本文复制引用
施羿,梁立功,封皓..基于多时频图和注意力机制的Φ-OTDR相似事件识别方法[J].光通信技术,2025,49(5):78-83,6.基金项目
国家重点研发计划项目(2022YFC3203802)资助. （2022YFC3203802）
