Ultrasonic Recognition of Component Crack Defect

摘要：

Design and realization methods of frequency tracking system of Ultrasonic therapeutic equipment based on DDS are introduced in this paper. This methods of frequency tracking with AD9833 can provide exact and double-quick frequency tracking of Ultrasonic therapeutic equipment with the scope of the frequency of 998kHz-1002kHz. Punch advance is 1Hz.

关键词： multi-resolution analysis of wavelet packet energy of wavelet packet characteristic vector energy spectrum

作者: SHI Xiao-hong Dun Yi XU Zhang-sui

作者单位: Ordnance Engineering College, Shijiazhuang 050003

会议类型: 国际会议

会议名称: 第七届国际测试技术研讨会

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-05（万方平台首次上网日期，不代表论文的发表时间）