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实现高噪声背景下超声回波信号的可靠识别在工程实际中非常重要。本文对高噪声背景下的超声测距信号进行了傅里叶频谱分析和成分分析 ,在此基础上确定了频率滤波的滤波范围 ,并进行了滤波处理。提出了用自相关技术实现高噪声背景下超声回波信号识别的方法 ,建立了相应的数学模型 ,给出了理论分析和实验结果
In the context of high-noise ultrasound echo signal reliable identification in engineering practice is very important. In this paper, Fourier spectrum analysis and composition analysis are carried out on the ultrasonic ranging signal in the background of high noise. On this basis, the filtering range of the frequency filtering is determined and the filtering process is carried out. The method of autocorrelation technique for ultrasonic echo signal recognition in high noise background is put forward. The corresponding mathematical model is established and the theoretical analysis and experimental results are given