光学仪器, 2018, 40 (1): 19, 网络出版: 2018-04-09
基于LabVIEW的PGC零差检测技术研究
Research on PGC homodyne detection technology based on LabVIEW
摘要
相位生成载波(PGC)调制和解调技术是干涉型光纤传感器领域非常重要的信号处理技术。简要说明了相位生成载波的调制和解调原理,结合具体的公式推导过程对PGC-DCM解调算法和PGC-Arctan解调算法进行了详细的理论分析。利用LabVIEW软件编写了两种PGC解调过程的仿真程序,实现了对被测信号的解调。对比分析了两种解调结果,对PGC解调中的一些关键参数进行了讨论。该研究结果对于光纤干涉传感器的相位解调技术的改进具有参考价值。
Abstract
Phase generated carrier(PGC) modulation and demodulation technology is a very important signal processing technology in the field of interferometric fiber-optic sensors.The principle of modulation and demodulation of PGC is briefly described.The PGC-DCM(differentical cross multiplying) demodulation algorithm and the PGC-Arctan demodulation algorithm are two classic PGC demodulation algorithms.The detailed theoretical analysis of the two demodulation algorithms is carried out in combination with the specific formula deduction process.The simulation program of the two PGC demodulation processes is given by LabVIEW software,and the demodulation of the measured signal is realized.Two kinds of demodulation results are compared and analyzed,and some key parameters in PGC demodulation are discussed.The conclusions provide reference value for the improvement of the phase demodulation technology of the fiber-optic interferometer.
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叶有祥, 周盛华. 基于LabVIEW的PGC零差检测技术研究[J]. 光学仪器, 2018, 40(1): 19. YE Youxiang, ZHOU Shenghua. Research on PGC homodyne detection technology based on LabVIEW[J]. Optical Instruments, 2018, 40(1): 19.
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