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引用次数: 0
摘要
本文采用时域Higuchi算法计算了分形维数(FD)，目的是识别超声信号中包含的回波，以区分回波和由电噪声引起的振荡。一旦回声参考(信号)被设置，选择小波尺度(Morlet, Mexican Hat y Daubechies 5);其中，小波Morlet的性能最好，因此用它来估计水中超声信号的时间延迟。
Delay Time Estimation in Water Using Fractal Dimension and Wavelets
In this work the fractal dimension was calculated (FD) using the Higuchi´s algorithm in time domain, with the objective of identified the echoes contained in ultrasonic signals, in order to differentiate echoes from oscillations due to electric noise.Once the echo reference (signal) was set, the wavelets scales were chosen (Morlet, Mexican Hat y Daubechies 5); from all these, the Wavelet Morlet has the best performance, therefore this was used to estimate time delays in the ultrasonic signals acquired in water.
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