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高精度调节和稳定光纤干扰仪用于位移测量
Alexander von Schmidsfeld1, Knarik Khachatryan1, Michael Reichling1
1Institut für Physik, Universität Osnabrück, Barbarastr. 7, 49076 Osnabrück, Germany.
The Review of scientific instruments
|September 3, 2025
概括
本研究使用比例/整合控制循环对光纤干扰仪进行自动调整. 这种方法有效地减少了由热漂移引起的错位,提高了测量准确度.
科学领域:
- 光学和光学
- 测量学
- 控制系统工程
背景情况:
- 干扰仪需要在边缘中心精确对齐以获得最佳的灵敏度和线性.
- 热漂移和机械振动通常会导致干扰仪的错位,降低测量性能.
- 现有的调整方法往往是手动的或缺乏长期稳定性.
研究的目的:
- 开发和演示光纤干扰仪的自动调整机制.
- 解决环境因素造成的长期漂移和错位问题,如热量变化.
- 提高干涉测量位移测量的稳定性和准确性.
主要方法:
- 实现比例/整体 (PI) 控制循环进行自动对齐.
- 引入使用微杆生成可检测错误信号的波位移.
- 使用锁定探测器处理的干扰信号的第二波进行反.
- 采用压缩元件来积极调整光学元件以实现实时对齐校正.
主要成果:
- 开发的PI控制循环成功纠正了干扰仪的错位.
- 该系统表现出高精度的稳定性,将误差限制在干扰仪边缘的2%以下.
- 由于控制循环的时间常数很大,该方法证明对缓慢的过程如热漂移有效.
结论:
- 使用PI控制循环进行自动调整是维持干扰仪稳定的可行解决方案.
- 拟议的方法显著提高了纤维干扰仪的位移测量的可靠性和精度.
- 这种技术提供了一种强大的方法来抵消影响光学计量系统的环境干扰.
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