Stabilized.interrogation and multiplexing techniques for fibre Bragg grating vibration sensors
Stabilized.interrogation and multiplexing techniques for fibre Bragg grating vibration sensors
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DOI：
10.1088/0957-0233/16/3/024
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发表时间：
2005-03-01
影响因子：
2.4
通讯作者：
Kim, CG
中科院分区：
文献类型：
--
作者：
Bang, HJ;Jun, SM;Kim, CG
我们展示了一种简单的高频范围内复用光纤布拉格光栅 (FBG) 传感器询问系统。使用具有窄自由光谱范围 (FSR) 的可调谐光纤法布里-珀罗 (FFP) 滤波器来简化 FBG 振动传感器的多路复用解调器。还开发了稳定控制单元来维持传感器的最大灵敏度。为了验证稳定控制单元的性能，我们通过改变环境温度来测量FBG传感器的灵敏度，在稳定控制的情况下，系统的平均灵敏度为2.5 n epsilon(RMS) Hz(-1/2)。最后，使用在线 FBG 传感器进行多点振动测试，以验证 FBG 系统的多路复用性能。
We demonstrated a simple interrogation system for multiplexed fibre Bragg grating (FBG) sensors in a high-frequency range. A tunable fibre Fabry-Perot (FFP) filter with narrow free spectral range (FSR) was used to simplify the multiplexing demodulator for FBG vibration sensors. A stabilization-controlling unit was also developed for the maintenance of maximum sensitivity of the sensors. In order to verify the performance of the stabilization control unit, we measured the sensitivity of the FBG sensor by changing environmental temperature, and the system showed an average sensitivity of 2.5 n epsilon(RMS) Hz(-1/2) for a stabilization-controlled case. Finally, multi-point vibration tests using in-line FBG sensors were conducted to validate the multiplexing performance of the FBG system.