CAJ | 학술논문

首次提出用时域互相关法处理 Sagnac/Mach-Zehnder 分布式光纤传感系统的干涉输出信号，对扰动进行检测和定位。首先对 Sagnac/Mach-Zehnder 分布式光纤传感系统进行了扰动检测和定位的理论分析，推导出扰动引起的干涉输出信号的表达式，利用Bessel函数展开，确定了该系统的两路干涉输出满足时域互相关的特性。在此基础上进一步分析了两路干涉信号的表达式，提出基频定位法和微分定位法两种时域互相关方法处理干涉信号，确定扰动位置。对两种扰动定位方法进行了Matlab仿真，并通过实验在多个扰动位置多次验证了两种方法的正确性。
수차제출용시역호상관법처리 Sagnac/Mach-Zehnder 분포식광섬전감계통적간섭수출신호，대우동진행검측화정위。수선대 Sagnac/Mach-Zehnder 분포식광섬전감계통진행료우동검측화정위적이론분석，추도출우동인기적간섭수출신호적표체식，이용Bessel함수전개，학정료해계통적량로간섭수출만족시역호상관적특성。재차기출상진일보분석료량로간섭신호적표체식，제출기빈정위법화미분정위법량충시역호상관방법처리간섭신호，학정우동위치。대량충우동정위방법진행료Matlab방진，병통과실험재다개우동위치다차험증료량충방법적정학성。
This paper proposes to process the interference outputs of the Sagnac/Mach-Zehnder interferometer by using time-domain cross-correlation method, which is a distributed optical fiber sensing system, to detect and locate the disturbance. Firstly, it gives the theoretical analysis of Sagnac/Mach-Zehnder interferometer, derives the expression for the interference outputs and uses Bessel function to expanse the expression, demonstrates the two interference outputs of the system meet the time-domain cross-correlation properties. Based on further analysis of the expression of two interference signals, it proposes two time-domain cross-correlation method by the baseband positioning method and differential positioning method to approach the interference signal to determine the disturbance location.