摘要
针对谐振式陀螺输出频率差信号微弱的特点,设计了一种应用于谐振式光纤陀螺的数字化双相位的锁相放大器,用于检测谐振式光纤陀螺Sagnac效应引起的角速度信号。该锁相放大器无需对参考信号进行相位调整即可实现对待测信号的鉴幅功能,改善系统检测系统的信噪比,实现微弱信号检测。采用数字电路实现该锁相放大器,并将其集成到FPGA上,有利于陀螺小型化和集成化。
According to the feature of the weak difference frequency signal of the output of resonator fiber optic gyro,a digital dual-phase lock-in amplifier（ LIA） is proposed to detect the angular velocity signal caused by the Sagnac effect,which needn＇t do a phase adjustment for the reference signal,improve the system signal-to-noise ratio and realize the weak signal detection. The LIA is realized by using digital circuit method and integrated into the Field-Programmable Gate Array（ FPGA）,which is beneficial to the miniaturization of the gyro system.
作者
张焱
唐杰
赵宁
张彤
ZHANG Yan;TANG Jie;ZHAO Ning;ZHANG Tong(School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China;School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China;Suzhou Key Laboratory of Metal Nano-Optoelectronic Technology, Suzhou Research Institute of Southeast University, Suzhou Jiangsu 215123, China)
出处
《传感技术学报》
CAS
CSCD
北大核心
2018年第1期1-5,共5页
Chinese Journal of Sensors and Actuators
