概括
本研究介绍了一种使用多核光纤 (MCF) 抑制连贯色的新型分布式声学传感 (DAS) 系统. 空间旋转向量平均 (SRVA) 方法有效地减少噪声,并改善光纤传感中的信号质量.
科学领域:
- 光电学是指光电子产品.
- 光纤光学是指光纤的使用.
- 传感技术 传感技术
背景情况:
- 多核光纤 (MCF) 在多个空间通道中提供独立的光传输,使其对分布式光纤传感具有吸引力.
- 连贯色是分布式声学传感 (DAS) 系统的一个重大挑战,限制了性能和可靠性.
- 通过MCF平行核心实现的空间分割多重复合 (SDM) 技术,为克服传感限制提供了一条途径.
研究的目的:
- 开发和验证与多核光纤 (MCF) 集成的分布式声学传感 (DAS) 系统,以有效地抑制连贯色.
- 引入和理论分析空间旋转向量平均 (SRVA) 方法,用于基于MCF的DAS中抑制色.
- 为了证明SRVA方法的性能改进与传统技术相比.
主要方法:
- 将多核光纤 (MCF) 集成到分布式声学传感 (DAS) 系统中.
- 空间旋转向量平均 (SRVA) 方法用于合并空间信号以减少色的理论分析.
- 使用2.58公里的基于MCF的DAS系统进行实验调查.
主要成果:
- 该SRVA方法有效地将雷利反散信号的色率降低了三倍.
- 与频谱提取和复杂化方法 (SERM) 相比,振幅波动范围减少了21.9dB,噪声水平减少了9.5dB.
- 该系统证明了局部化虚假报警的缓解,并实现了无扭曲的相位恢复,具有出色的低频信号恢复.
结论:
- 拟议的SRVA方法与基于MCF的DAS集成,有效抑制连贯色,显著提高传感性能.
- 这种方法克服了DAS系统的关键局限性,使得远距离光纤传感更可靠,更准确.
- 这些发现支持基于SDM的MCF在先进的综合传感和通信系统中的应用.
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