用于速率测量的光纤谐振陀螺数字光谱信号处理
Digital Spectrometry Signal Treatment Applied to a Fiber Optic Resonant Gyroscope for Rate Measurements
摘要：
FORG（光纤谐振陀螺仪）的工作原理是使用一个循环环形谐振腔来获得旋转诱导的Sagnac效应增强（由Ezekiel和Balsamo引用）。它赋予FORG与I-FOG（干涉式光纤陀螺仪）相当的灵敏度，I-FOG的光纤长度等于精细度因子的一半。其他优点是尽管热漂移，因为FORG使用比I-FOG更少的光纤，使第一个比最后一个更少的热漂移灵敏度。这项工作的建议是显示一个应用到一个FORG技术，简化了信号处理，采用全数字设置，导致最大限度地平坦的比例因子。在这项调查中提出的模拟结果，采用改进的数字FM光谱技术的抽取和插值技术在一个环形谐振器，追求10米长的SM-PM光纤线圈和10厘米的直径，与1550纳米的激光源。这些技术的优点是简化了电子电路，提供了升级设施，仅使用一个DSP（数字信号处理器），实现所有需要的功能。这种方法的研究是基于光场开关方案和数字频域光谱法。
英文摘要：
The FORG (Fibre Optic Resonant Gyroscope) opeeration principle uses a recirculating ring resonant cavity to get a rotation-induced Sagnac effect enhancement (cited by Ezekiel and Balsamo). It grants to a FORG a comparable sensitivity in relation an I-FOG (Interferometric Fibre Optic Gyroscope)that has the fiber lenght equal a half of finesse factor times longer. Other advantages is despite of thermal drift because the FORG uses less quantity of fibre than the I-FOG, giving to the first less thermal drift sensitivity than the last. The proposal of this work is to show a applied to a FORG technique that simplifies the signal treatment, employing all digital setup, resulting in a maximally flat scale factor. In this investigation are presented over the simulations results, employing the modified digital FM spectrometry techniques by decimation and interpolation techniques over a ring resonator that pursuit a 10 meters SM-PM lenght fiber coil and 10 centimeters of diameter, with a 1550 nanometers laser source. The advantages of these techniques are to simplify the electronic circuitry, offering an upgrade facility, using only one DSP (Digital Signal Processor), realizing all needed functions. The investigation of this method is based in a optical field switching scheme and digital frequency domain spectrometry.
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