基于同步挤压改进短时傅立叶变换的分频蚂蚁追踪在断裂识别中的应用

黄苇, 周捷, 高利君, 王胜利, 严海滔

The application of frequency division ant tracking based on synchronous extrusion improvement of short time Fourier transform in crack detection

HUANG Wei, ZHOU Jie, GAO Li-Jun, WANG Sheng-Li, YAN Hai-Tao

图3 加噪信号及利用不同分析方法得到的时频谱 a—原始加噪信号;b—短时傅立叶变换的时频谱;c—改进短时傅立叶变换的时频谱;d—同步挤压改进短时傅立叶变换的时频谱

Fig.3 Noise-added signal and time spectrum obtained by different analysis methods a—original noise signal;b—time frequency spectrum of short time Fourier transform;c—improved time frequency spectrum of short time Fourier transform;d—synchronous to improve time frequency spectrum of short time Fourier transform