摘要
脉冲群重复频率是电磁导波缺陷检测系统的一个重要参数。文章分析了电磁导波激励脉冲群的产生及调节方式,采用小波包系数区域相关法对不同重复频率的检测信号进行分析,得出了激励脉冲群的最佳重复频率范围,并从功率谱峰值与脉冲群重复频率间的关系加以验证。
Repetition frequency of magnetostrictive guided wave inspiriting pulses is an important parameter. The generation and adjustment method of magnetostrictive guided wave was analyzed. Signal with different repetition frequen- cy was discussed through the region correlation method of wavelet packet coefficient, and the best repetition frequency range of magnetostrictive guided wave inspiriting pulses was obtained. The result was tested by the relation of power spectral peak density and pulses repetition frequency.
出处
《仪表技术》
2012年第12期44-46,50,共4页
Instrumentation Technology
关键词
电磁导波
激励脉冲群
小波包系数区域相关法
重复频率
magnetostrictive guided wave
inspiriting pulses
region correlation method of wavelet packet coeffi-cient
repetition frequency
