Normalization method of ultrasonic testing signal, the advantages and disadvantages of time domain, frequency domain were discussed.

探讨了超声波检测信号归一化处理的方法，以及时域信号归一化和频域信号归一化的优缺点。

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Secondly, the de-nosing problem and the normalization processing problem of the OFSMI signal are studied, according to the specific requirement for the signal at moderate optical feedback level.

其次，针对适度光反馈水平下参数测量对信号特征点的要求，研究了信号的去噪问题及归一化处理问题。

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Secondly, the de-nosing problem and the normalization processing problem of the OFSMI signal are studied, according to the specific requirement for the signal at moderate optical feedback level.

其次，针对适度光反馈水平下参数测量对信号特征点的要求，研究了信号的去噪问题及归一化处理问题。

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