A method for damage positioning is developed on the basis of testing the variation ratio of squared frequency.

介绍了基于频率变化平方比的损伤定位方法。

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Compared with other frequency measurements, the method based on the ASIC makes use of simple periphery circuit around MPU and can self-adapts the variation of input signal frequency.

基于ASIC的方法与其他频率测量方法相比，MPU外围电路简单，能自适应输入信号频率的变化。

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Generalized into local frequency from integral frequency, the method of joint time-frequency distribution effectively analyzes the signal based on the variation of frequency with time.

联合时频分布方法把整体频谱推广到局部频率，根据频率随着时间的变化情况，对信号进行有效的分析。

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