摘要
为了提高超声探测系统的信噪比和探测深度,根据编码激励超声探测原理,对m序列的编码发射方式和激励超声探测过程进行了仿真研究.结果表明,m序列编码激励超声探测方式能够在噪声淹没信号的情况下提取出有效的回波信号;m序列码长越长,抗干扰性能越强,编码激励超声探测方式可提高超声探测的深度和精度.
In order to improve the signal to noise ratio(SNR) and detecting depth of ultrasound detecting system,according to the principle of coded excitation ultrasound detecting,the coded mode and the process of m-sequence coded excitation ultrasound detecting are simulated.The result shows that the serial of m-sequence coded excitation ultrasound detecting can extract effective echo signal in the case of signal is submerged in noise.The longer the length of m-sequence,the stronger the anti-noise ability.The method of coded excitation ultrasound detecting increases the detecting depth and precision.
出处
《河南师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第3期51-54,共4页
Journal of Henan Normal University(Natural Science Edition)
基金
河南省教育厅科技攻关项目(2010A510006
2009B510011)
关键词
编码激励
超声探测
M序列
脉冲压缩
coded excitation
ultrasound detecting
m-Sequence
pulse compression
