东南大学学报（英文版）2022，Vol.38Issue(1)：27-35,9.DOI:10.3969/j.issn.1003-7985.2022.01.005
基于有限新息率的二进制频率编码超声信号稀疏采样
Finite rate of innovation sparse sampling for a binary frequency-coded ultrasonic signal
摘要
Abstract
To achieve sparse sampling on a coded ultrasonic signal,the finite rate of innovation(FRI)sparse sampling technique is proposed on a binary frequency-coded(BFC)ultrasonic signal.A framework of FRI-based sparse sampling for an ultrasonic signal pulse is presented.Differences between the pulse and the coded ultrasonic signal are analyzed,and a response mathematical model of the coded ultrasonic signal is established.A time-domain transform algorithm,called the high-order moment method,is applied to obtain a pulse stream signal to assist BFC ultrasonic signal sparse sampling.A sampling of the output signal with a uniform interval is then performed after modulating the pulse stream signal by a sampling kernel.FRI-based sparse sampling is performed using a self-made circuit on an aluminum alloy sample.Experimental results show that the sampling rate reduces to 0.5 MHz,which is at least 12.8 MHz in the Nyquist sampling mode.The echo peak amplitude and the time of flight are estimated from the sparse sampling data with maximum errors of 9.324％and 0.031％,respectively.This research can provide a theoretical basis and practical application reference for reducing the sampling rate and data volume in coded ultrasonic testing.关键词
编码超声信号/有限新息率/高阶矩/稀疏采样/电路实现Key words
coded ultrasonic signal/finite rate of innovation/high-order moment/sparse sampling/circuit implementation分类
通用工业技术引用本文复制引用
宋寿鹏,陈仪倩,胥保文,邱越..基于有限新息率的二进制频率编码超声信号稀疏采样[J].东南大学学报（英文版）,2022,38(1):27-35,9.基金项目
The National Natural Science Foundation of China(No.51375217). （No.51375217）
