An Arc Tangent Function Demodulation Method of Fiber-Optic Fabry-Perot High-Temperature Pressure Sensor  

作　　者：Qianyu REN Junhong LI Yingping HONG Pinggang JIA Jijun XIONG 

机构地区：[1]Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan, 030051, China [2]Key Laboratory Instrumentation Science & Dynamic Measurement, Ministry of Education, North University of China, Taiyuan, 030051, China [3]Department of Automation, Shanxi University, 030006, China

出　　处：《Photonic Sensors》2017年第3期211-216,共6页光子传感器（英文版）

基　　金：Acknowledgment This work was supported by the National Science Fund for Distinguished Young Scholars （No 51425505） and the National Natural Science Foundation of China （No. 51405454）.

摘　　要：A new demodulation algorithm of the fiber-optic Fabry-Perot cavity length based on the phase generated carrier （PGC） is proposed in this paper, which can be applied in the high-temperature pressure sensor. This new algorithm based on arc tangent function outputs two orthogonal signals by utilizing an optical system, which is designed based on the field-programmable gate array （FPGA） to overcome the range limit of the original PGC arc tangent function demodulation algorithm. The simulation and analysis are also carried on. According to the analysis of demodulation speed and precision, the simulation of different numbers of sampling points, and measurement results of the pressure sensor, the arc tangent function demodulation method has good demodulation results： 1 MHz processing speed of single data and less than 1% error showing practical feasibility in the fiber-optic Fabry-Perot cavity length demodulation of the Fabry-Perot high-temperature pressure sensor.A new demodulation algorithm of the fiber-optic Fabry-Perot cavity length based on the phase generated carrier （PGC） is proposed in this paper, which can be applied in the high-temperature pressure sensor. This new algorithm based on arc tangent function outputs two orthogonal signals by utilizing an optical system, which is designed based on the field-programmable gate array （FPGA） to overcome the range limit of the original PGC arc tangent function demodulation algorithm. The simulation and analysis are also carried on. According to the analysis of demodulation speed and precision, the simulation of different numbers of sampling points, and measurement results of the pressure sensor, the arc tangent function demodulation method has good demodulation results： 1 MHz processing speed of single data and less than 1% error showing practical feasibility in the fiber-optic Fabry-Perot cavity length demodulation of the Fabry-Perot high-temperature pressure sensor.

关 键 词：Arc tangent FABRY-PEROT DEMODULATION pressure sensor 

分 类 号：TN924[电子电信—通信与信息系统] TP212[电子电信—信息与通信工程]