【摘要】 提出了用法布里-珀罗(F-P)型光纤加速度计构成同振式矢量水听器的方案,并进行了结构设计。通过对水听器光学输出解调算法的理论分析,采取双探头接收光强差值的倒数输出设计,从而实现了针对法F-P型多光束干涉的相位产生载波(PGC)解调方案。推导了F-P型光纤加速度计的加速度相移灵敏度的表达式,用计算机仿真了F-P干涉的PGC解调过程,并对系统输入输出信号的进行对比,验证了解调方法的可行性,拓宽了PGC解调的应用范围。分析了光强及C值选择对解调的影响,并采用模拟输入F-P信号的方式,进行DSP模拟解调验证,证明了F-P同振式光纤矢量水听器PGC解调算法的可行性。更多还原

【Abstract】 The principles of Fabry-Perot(F-P) optical fiber accelerometer were presented.The dynamic model of second-order single degree of freedom system for F-P optical fiber accelerometers was analyzed and the frequency response was given.A corresponding scheme of vector hydrophone array with F-P optical fiber accelerometers was demonstrated and its structure was designed.Based on the analysis of demodulation algorithm for hydrophone optical output,the design using double probes to receive the reciprocal output of intensity difference was taken,and then the design of phase generated carrier(PGC) demodulation algorithm for F-P multi-beam interference was given.Math formulas of acceleration sensitivity of phase shift for F-P optical fiber accelerometers were given.The PGC demodulation algorithm for F-P interference was simulated.Comparing the input signal with the output signal,it shows that this demodulation algorithm is feasible,and the range of PGC demodulation algorithm is extended.The influence of the C value and the intensity of light source on PGC demodulation was analyzed.By simulating the input signal,the demodulation of DSP was validated,which proves that the PGC demodulation algorithm for F-P optical fiber vector hydrophone array is possible.更多还原