摘要
使用基于chirplet时频原子的匹配追踪方法,对超声导波管道检测信号进行分析处理,并与基于Gabor时频原子的处理结果进行了比较。研究结果表明,chirplet时频原子能反映出的超声导波检测信号的频率变化特征,得到的时频分布与频散曲线能很好的吻合,基于chirplet原子的匹配追踪方法更适合于超声导波检测信号处理。
Maching pursuit based on chirplet time-frequency atoms was utilized to process ultrasonic guided-wave pipeline detection signals,and the results were compared with that using Gabor functions.The study shows that,chirplet atoms can reveal the time-frequecny varying characteristic of ultrasonic guided-wave detection signals,the achieved time-frequency representation match the dispersion curves,and matching pursuit based on chirplet can be better applied to ultrasonic guided-wave detection signal process.
出处
《舰船电子工程》
2010年第12期174-177,共4页
Ship Electronic Engineering
基金
中国博士后科学基金项目(编号:200801489)
湖北省自然科学基金项目(编号:2007ABA224)资助
关键词
匹配追踪
chirplet原子
超声导波
时频分布
matching pursuit
chirplet atom
ultrasonic guided-wave
time-frequency representation
