光学学报, 2019, 39 (6): 0606001, 网络出版: 2019-06-17
短腔长复合式光纤法布里-珀罗压力传感器椭圆拟合腔长解调算法 下载: 1036次
Elliptical-Fitting Cavity Length Demodulation Algorithm for Compound Fiber-Optic Fabry-Perot Pressure Sensor with Short Cavity
光纤光学 光纤传感器 复合腔 反射光谱 6个参数的椭圆拟合算法 双参数椭圆拟合算法 fiber optics fiber-optic sensors compound cavity reflection spectrum six-parameter ellipse fitting algorithm two-parameter ellipse fitting
摘要
建立了一种短腔长复合式光纤法布里-珀罗压力传感器反射光谱的模型,提出了一种双参数椭圆拟合腔长解调算法,并对腔长为26~30 μm的复合式法布里-珀罗腔的解调进行了仿真。结果表明,采用双参数椭圆拟合算法进行腔长解调的最大误差仅为0.05 μm。搭建了光纤法布里-珀罗传感器解调系统,在加压条件下对复合式光纤法布里-珀罗压力传感器进行了解调实验,实现了20 kHz的解调速率,验证了所提算法在解调短腔长复合式光纤法布里-珀罗压力传感器方面的可行性与实时性。
Abstract
A reflection spectrum model of a compound fiber-optic Fabry-Perot (FP) pressure sensor with short length is established, a two-parameter ellipse-fitting cavity length demodulation algorithm is proposed, and the demodulation for FP-cavity lengths in the range of 26-30 μm is simulated. The results show that the maximum error for the demodulated two-parameter ellipse-fitting cavity length is only 0.05 μm. A demodulation system for the fiber-optic FP sensor is established, and the experiments under different pressures are conducted. A 20-kHz demodulation rate is achieved. Thus, the feasibility and real-time performance of the proposed algorithm for demodulating a compound fiber-optic FP pressure sensor with a short cavity are verified.
王伟, 唐瑛, 张雄星, 陈海滨, 郭子龙, 王可宁. 短腔长复合式光纤法布里-珀罗压力传感器椭圆拟合腔长解调算法[J]. 光学学报, 2019, 39(6): 0606001. Wei Wang, Ying Tang, Xiongxing Zhang, Haibin Chen, Zilong Guo, Kening Wang. Elliptical-Fitting Cavity Length Demodulation Algorithm for Compound Fiber-Optic Fabry-Perot Pressure Sensor with Short Cavity[J]. Acta Optica Sinica, 2019, 39(6): 0606001.