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漂移错误补偿算法用于异质光学海水折射率指数不稳定信号监测的光学
Shiwen Zhang1,2, Liyan Li1,2, Yuliang Liu1,2
1Optoelectronics System Laboratory, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China.
Sensors (Basel, Switzerland)
|October 28, 2023
概括
本研究引入了一个波纹分解算法,以弥补海水长期折射率测量中的漂移误差,使用光学异构干扰计. 该方法显著提高了不稳定的信号的准确性,减少了36%以上的测量误差.
科学领域:
- 海洋学 海洋学 海洋学
- 光学物理学的光学物理学
- 信号处理 信号处理
背景情况:
- 海水的折射率测量对海洋学至关重要.
- 光学异质干扰仪提供高精度,但在长期监测期间容易产生漂移错误.
- 漂移误差,主要来自声光变频器 (AOFS) 的不稳定性,显著影响测量可靠性.
研究的目的:
- 开发和验证海水折射率测量的漂移误差补偿算法.
- 在长期海洋监测中提高光学异体干扰度的准确性和可靠性.
- 为了应对不稳定的信号和现实应用中的显著漂移所带来的挑战.
主要方法:
- 提出了一个基于波形分解的新型漂移错误补偿算法.
- 该算法通过自适应的方式将背景噪声与信号分开,以计算频率差异.
- 实验验证包括模拟,实验室液体折射率测量和现场海水监测.
主要成果:
- 该算法有效地弥补了由AOFS频率不稳定性 (测量在~0.1Hz) 引起的漂移错误.
- 模拟实验实现了10-8米的光学长度标准偏差.
- 实验室测量显示,错误率从36.942%降至0.592%.
- 实地实验表明,处理的结果与目标车辆的运动保持一致,优于现有的算法.
结论:
- 拟议的波形分解算法为海水折射率监测中的漂移误差补偿提供了强大的解决方案.
- 该方法增强了光学异体干扰测量的准确性和可靠性,用于长期,不稳定的信号测量.
- 这种技术适用于实际的海洋应用,需要精确和连续的折射率数据.
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