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针对干涉型光纤传感信号的特点,采用数字滤波和小波去噪两种方法对干涉信号进行了消噪处理,并对去噪效果进行了比较和分析。结果表明,截止频率为4 kHz,阶次为3的Butterworth低通滤波器和Birge-Massart阈值小波去噪算法在干涉型光纤传感系统中有较好的使用价值。
According to the characteristics of the interferometric optical fiber sensing signal, two methods of digital filtering and wavelet denoising are used to denoise the interference signal, and the denoising effects are compared and analyzed. The results show that the Butterworth low - pass filter and Birge - Massart threshold wavelet denoising algorithm with cutoff frequency of 4 kHz and order of 3 have good value in interferometric fiber optic sensing system.