Distributed dynamic strain measurement using a correlation-based brillouin sensing system
Distributed dynamic strain measurement using a correlation-based brillouin sensing system
复制标题
DOI：
10.1109/lpt.2002.806107
复制
发表时间：
2003-02-01
影响因子：
2.6
通讯作者：
Ong, SSL
中科院分区：
文献类型：
--
作者：
Hotate, K;Ong, SSL
传统的基于光纤布里渊的应变传感器能够进行分布式传感，使其在结构监测应用中优于基于光纤布拉格光栅的传感器。然而，布里渊传感器具有低的空间分辨率，并且不适合动态应变测量，因为它们具有几分钟的大测量时间。我们提出了一种基于相关的连续波技术，用于高空间分辨率和分布式动态应变测量，使用受激布里渊散射。使用我们的技术，我们已经成功地测量了动态应变从一个5厘米的振动部分，在8.8赫兹的采样率与应变精度约+/-38 μ m。
Conventional fiber Brillouin-based strain sensors are capable of distributed sensing, making them advantageous over fiber Bragg grating-based sensors for structural monitoring applications. However, Brillouin sensors have low spatial resolution and are inappropriate for dynamic strain measurements as they have large measurement times of several minutes. We present a correlation-based continuous-wave technique for high spatial resolution and distributed dynamic strain measurements using stimulated Brillouin scattering. Using our technique, we have successfully measured dynamic strain from a 5-cm vibrating section, at a sampling rate of 8.8 Hz with a strain accuracy of about +/-38 muepsilon.