双干扰信号的混合增强合成和多重结构优化,用于推拉直线干扰计FBG加速度计的推拉直线干扰计
Optics express
|February 20, 2026
概括
这项研究引入了一种新的方法,通过补偿道不匹配和优化复杂化来改进纤维布拉格格加速仪. 开发的波长分割多重复合系统实现了更高的灵敏度和更低的噪声,用于准确的加速度测量.
科学领域:
- 光学工程是指光学工程.
- 传感器技术 传感器技术
- 计量学 计量学 计量学
背景情况:
- 在线干扰度纤维布拉格格网 (FBG) 加速度计面临的挑战是道间响应不匹配和噪声底部限制.
- 推拉配置的灵敏度是双倍的,但由于独立的干扰通道,需要信号合成,这些干扰通道容易产生不对称感应的错误.
- 结构不对称性降低了合成准确度,降低了灵敏度,并增加了FBG加速度计的噪声底部.
研究的目的:
- 为FBG加速度计开发一个不对称性补偿的双干扰通道合成方案.
- 研究和比较波长分割多重复合 (WDM),时间分割多重复合 (TDM) 和空间分割多重复合 (SDM) 系统中的噪声合机制.
- 为高性能传感器复合结构建立关键设计标准.
主要方法:
- 建立了一个定量相关模型来分析不对称性对双通道振幅的影响.
- 建议使用动态缩放因子进行非对称补偿合成方案,以实现精确的通道匹配.
- 噪声合机制在WDM,TDM和SDM复杂化系统中被系统地研究.
主要成果:
- 发现微小的1毫米不对称性在双通道振幅中诱导了显著的7rad响应偏差.
- 波长分割复杂化 (WDM) 显示出卓越的性能,与TDM和SDM相比,噪声地板高度分别低2.6dB和5.6dB.
- 一个基于WDM的推拉干涉计FBG加速仪实现了53.18dB (re:rad/g) 的灵敏度和6.43×10−8 g/Hz的最小可检测加速.
结论:
- 拟议的不对称性补偿方案为FBG加速度计的不匹配提供了通用的解决方案,无论其来源如何.
- 在双通道FBG加速度计系统中,WDM是最大限度地减少噪声地板升高的最佳多重复合方法.
- 基于WDM的优化FBG加速度计提供了高灵敏度和低可检测的加速度与简化的光学结构.
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