谐振式光学陀螺检测电路的噪声分析  

Analysis on the noise of the resonator optical gyroscope detection circuit

作　　者：姜楠[1] 马迎建[1] 洪灵菲[1] 

机构地区：[1]北京航空航天大学仪器科学与光电工程学院,北京100191

出　　处：《电子测量技术》2008年第12期4-6,10,共4页Electronic Measurement Technology

摘　　要：噪声是限制陀螺精度的重要原因,因此为提高陀螺精度,首先要分析噪声的水平和来源。本文介绍了一种应用于谐振式光学陀螺数字检测电路的噪声逐级检测方法,并分析了检测电路中各部分的噪声源。通过对现有某陀螺检测电路进行实验数据的分析,找到了对该谐振陀螺噪声贡献最大的部分。又从信噪比角度给出确定该陀螺输入光功率的方法,计算出了它的灵敏度。实验表明此方法可以分析出陀螺检测电路中各部分的噪声源,与理论分析一致。为抑制检测电路噪声,提高陀螺精度提供依据。Noise plays an important part in restricting the precision of gyro, so the noise＇s level and source must be analyzed to improve gyro＇s precision. This paper introduced a method to detect the noise of digital detection circuit in the resonator optical gyroscope step-by-step. The source of the noise that produced in each part is analyzed. Through the data of the experiment using a gyro in existence, the noise which contributes most to the circuit is found. For the best Signal-to-Noise Ratio （SNR） of the circuit, the optical power of this gyro＇s input is fixed. And its sensitivity is calculated. The experiment indicates that this method can he used to analyze the noise source of gyro detection circuit in each part, according to the theory analysis. It can offer evidence to restrain the detection of circuit＇s noise and improve the precision of gyros.

关 键 词：谐振陀螺 检测电路 噪声 灵敏度 

分 类 号：TP2[自动化与计算机技术—检测技术与自动化装置]