高分辨率的OFDR与所有格子纤维结合相变调和交叉相关性方法
Yanlin Liu1,2, Yang Luo1, Xiangpeng Xiao3
1Key Laboratory of Intelligent Optical Sensing and Manipulation (MoE), Nanjing University, Nanjing 210023, China.
Sensors (Basel, Switzerland)
|February 13, 2026
概括
这项研究引入了一种新的光频域反射计 (OFDR) 方法,用于精确的应变传感. 它实现了0.27毫米的张力边界的空间分辨率,大大提高了光纤传感应用中的精度.
科学领域:
- 光纤传感传感器是指光纤传感器.
- 光学计量学 在光学计量学
- 材料科学 材料科学 材料科学
背景情况:
- 空间分辨率对于光学频域反射计 (OFDR) 是至关重要的.
- 阶段敏感的OFDR (Φ-OFDR) 为空间分辨率提供了很高的潜力,但易受噪声的影响.
- 一致的色和系统噪声会导致 Φ-OFDR 结果的波动.
研究的目的:
- 开发一种基于OFDR的高空间分辨率的应变传感方法.
- 为了克服相位敏感的OFDR中的噪声限制.
- 为了实现准确和完整的应变分布测量.
主要方法:
- 组合相位解调 (使用频率转移平均和旋转向量总和算法) 与自适应窗口交叉相关性分析.
- FSAV和RVS算法抑制了连贯的色噪声,以准确地定位菌株.
- 适应性交叉相关窗口根据相调解结果调整到连续和均的应变区域.
主要成果:
- 实现了0.27mm的空间分辨率,用于在100-700μm的应变范围内的应变边界.
- 对于应变测量来说,证明了近0.94%的平方根平均误差.
- 处理时间大约为0.035秒,用于1.6米的解调长度.
结论:
- 拟议的方法提供了精确的空间定位的菌株边界和稳定的菌株测量.
- 它有效地抑制噪声,提高了基于OFDR的应变传感器的可靠性.
- 对于需要精确的应变分布分析的高分辨率OFDR应用具有显著的潜力.
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