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报道了三分量全保偏光纤加速度传感器的实验研究结果。传感器由6个弹性柱体共同支撑1个质量块构成三分量结构,由3个迈克尔逊全保偏光纤干涉仪共用一个光源组成。光学部分采用全保偏光纤干涉仪结构,消除了干涉光束偏振态随机变化引起的信号衰落,采用光频调制相位载波解调信号处理技术,消除了相位随机漂移引起的信号衰落,从而实现了对加速度信号的稳定检测。传感器的工作频带为5~500 Hz,加速度灵敏度达到660 rad/g,系统最小可测相位差为10-5rad,最小可测加速度达1.5×10-7m/s2,工作频带内加速度灵敏度变化小于2 dB。三轴加速度灵敏度和频率响应曲线与理论分析的结果基本一致。
The experimental results of the three-component fully-charged fiber acceleration sensor are reported. The sensor consists of 6 elastic cylinders supporting a mass to form a three-component structure, which is composed of three light sources shared by three Michelson full polarization maintaining fiber-optic interferometers. The optical part adopts the fully-preserved fiber-optic interferometer structure to eliminate the signal fading caused by the random variation of the polarization state of the interfering light beam. The optical frequency modulated phase carrier demodulation signal processing technique is adopted to eliminate the signal fading caused by the phase random drift, Acceleration signal stability detection. The working frequency band of the sensor is 5 ~ 500 Hz, the acceleration sensitivity is 660 rad / g, the minimum measurable phase difference of the system is 10-5rad, the minimum measurable acceleration is 1.5 × 10-7m / s2, the sensitivity of acceleration in the working band is less than 2 dB. Triaxial acceleration sensitivity and frequency response curve and the theoretical analysis of the results are basically the same.