电光与控制, 2009, 16 (7): 17, 网络出版: 2010-04-01
光纤陀螺本征频率和半波电压测量方法研究
Measurement Method for FOG Loop Eigenfrequency and Half-Wave Voltage
光纤陀螺 本征频率 半波电压 直接数字合成技术 fiber optic gyro loop eigenfrequency half-wave voltage direct digital synthesis
摘要
针对光纤陀螺工程化过程中本征频率和半波电压测试精度低、速度慢等问题,提出了一种新的解决方法。从互易性偏置调制的机理出发,将对本征频率的测量转化为对无效调制光功率响应的尖峰脉冲的测量;根据光功率响应机理,将对半波电压的测量转化为求有效调制光功率最小值。此方法利用直接数字合成技术完成对方波的频率和振幅的调整。方案首先通过 Matlab 进行仿真,并在实际电路中实现。与传统人工使用肉眼的测量方式相比,此方法的测试精度高、速度快,为光纤陀螺的工程化提供了方便。
Abstract
A novel approach is presented to solve the problems of low precision and slow speed in Fiber Optic Gyro (FOG) loop eigenfrequency and half-wave voltage measuring. The method comes from the mechanism of reciprocal shift modulation,which transforms the measuring of eigenfrequency into measuring the spike pulse responding to ineffective-modulation optic power. And half-wave voltage measurement is transformed in searching the minimum optic power of effective-modulation according to optic power responding mechanism. Direct digital synthesis is used for modulating the frequency and amplitude of the square wave. The scheme was tested by Matlab simulation,and was implemented in circuit. Compared with traditional measurement mode with naked eye,this method has higher precision and speed for eigenfrequency and half-wave voltage measurement.
张金保, 宋凝芳, 马东营, 金靖. 光纤陀螺本征频率和半波电压测量方法研究[J]. 电光与控制, 2009, 16(7): 17. ZHANG Jinbao, SONG Ningfang, MA Dongying, JIN Jing. Measurement Method for FOG Loop Eigenfrequency and Half-Wave Voltage[J]. Electronics Optics & Control, 2009, 16(7): 17.