密集型光纤应变测量方法研究进展
Research Progress of the Dense Optical Fiber Strain Measurement Methods
范俊成1
作者信息
- 1. 浙江纺织服装职业技术学院机电与轨道交通学院,浙江宁波 315000;中车株洲电力机车研究所有限公司,湖南株洲 412000
- 折叠
摘要
高密集应变信息的获取在航空航天领域具有重要意义,应变可直接反映结构力学状态并可据此推断出结构健康状态.基于光纤的应变测量技术可以密集获取光纤上的分布式应变,将光纤布设在被测结构表面可以得到结构上的应变场分布.近年来各种分布式光纤传感技术可以实现单根光纤上大规模传感器的复用,提高单根光纤上的空间测量分辨力是该领域始终关注的问题.首先对空间密集型应变测量场景及其需求进行介绍,然后对具有毫米级空间分辨力的典型分布式光纤应变传感技术进行综述,最后讨论了密集型光纤应变传感方法的发展方向.
Abstract
The acquisition of the high-density strain information is of great significance in the aeronautics and astronautics field.Strain can directly reflect the mechanical state of the structure and the structural health state can be inferred from the strain.The optical fiber-based strain measurement technology can densely obtain the distributed strain on the optical fiber,and the strain field distribution on the structure can be obtained by laying the optical fiber on the surface of the measured structure.In recent years,various distributed optical fiber sensing technologies can realize the multiplexing of large-scale sensors on a single optical fiber.Improving the spatial measurement resolution on a single optical fiber has always been a concern in this field.The paper begins by introducing space-intensive strain measurement scenarios and their requirements.It then examines typical dis-tributed fiber-optic strain sensing technologies with millimeter-level spatial resolution,and finally explores the future develop-ment direction of dense fiber-optic strain sensing methods.
关键词
应变测量/光纤/布里渊散射/光频域反射/激光频率调制Key words
strain measurement/fiber/Brillouin scattering/optical frequency domain reflectometry/laser frequency modulation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据