【摘要】 谐振式微型光学陀螺(R-MOG)是利用光学Sagnac效应实现对转动检测的一种高精度的惯性传感器件。在R-MOG系统中,信号处理具有非常重要的地位。根据R-MOG系统中,集成光学环形谐振腔的谱线宽度高达几十MHz以及R-MOG输出信号具有弱信号、大噪声特点,设计了一种用于提取被噪声淹没的微弱信号的高频锁相放大器。在对高频锁相放大器各部分电路进行具体设计和分析的基础上,完成了对整体电路的性能测试。测试结果表明,研制的锁相放大器在载波频率为30MHz时的等效输入噪声为11nV/Hz。将整个电路应用于R-MOG系统中,解调出的信号效果良好。更多还原

【Abstract】 Resonator micro optical gyro(R-MOG) is an inertial rotation sensor with high accuracy,which is based on the Sagnac effect.In R-MOG system,the signal process is of great importance.The spectral linewidth of the integrated optical resonator is high as several ten MHz and the output signal from the R-MOG is very small however the noise is large.A high frequency lock-in amplifier(LIA) has been designed to detect and measure the small signal obscured by the large noise.All element circuits used in the high frequency LIA are designed and analyzed.Then performance testing on the overall circuit has been completed.Testing show that the high frequency LIA has an equivalent input noise of 11 nV/Hz working at the carrier frequency of 30 MHz.When applied in R-MOG,the demodulated signal is perfect.更多还原