土密实度瞬态振动测试信号的降噪方法研究

On Noise Reduction of Testing Signal for Soil Compactness Using Instant Vibration Method

对土密实度瞬态振动测试信号进行分析之前,首先要对信号进行降噪处理,提高信号分析的准确性.该文通过对常用的两种信号降噪方法的分析对比研究,指出了采用非线性小波阈值法对测试信号进行降噪的效果最佳,并提出了确定小波阈值的方法.

Prior to the analysis of the soil compactness testing signal which is acquired by instant vibration method, the noise level needs to be reduced in order to improve the accuracy and reliability of the signal analysis. This paper examines two types of commonly used noise reduction methods. The analyzed results show that the non-linear wavelet threshold method is the best for soil compactness test signal. The threshold of wavelet noise reduction is also proposed in the paper.