概括
一个新的算法,BOCD-VT,改善了相位敏感光学时域反射计 (Φ-OTDR) 系统的相位解封. 它减少了错误,并提高了实时振动检测的信号质量.
科学领域:
- 光电学是指光电子产品.
- 信号处理 信号处理
- 光纤传感传感器是指光纤传感器.
背景情况:
- 对于 Φ-OTDR 系统来说,阶段解封至关重要.
- 解封错误引入相位错误,降低信号质量.
- 现有的方法在实时处理和准确性方面扎.
研究的目的:
- 为 Φ-OTDR 开发一种新的可变值相解封算法 (BOCD-VT).
- 为了提高 Φ-OTDR 中相解封的精度和效率.
- 为了实现实时,无跳跃的振动检测.
主要方法:
- 该BOCD-VT算法利用贝叶斯理论进行在线变化点检测.
- 使用局部信号差异化实现了一个动态解封值.
- 实验使用压电变频器 (PZT) 和16公里的城市暗光纤进行.
主要成果:
- BOCD-VT有效地最大限度地减少了由于解封错误引起的相变点.
- 与后处理方法相比,该算法实现了超过5dB的信号噪声比率 (SNR) 改进.
- 实时,无跳跃阶段解封成功演示.
结论:
- BOCD-VT在 Φ-OTDR 阶段解封方面提供了显著的进步.
- 该算法提供了高质量的振动信号,并改进了SNR.
- 这种方法可以在部署的光纤网络中实现高效和准确的实时振动监控.
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