激光干涉测速中的小波快速算法研究  

Research of wavelet fast algorithm in laser velocity interferometry

作　　者：赵新才[1,2] 吴云峰[2] 方亮[2] 刘宁文[1] 

机构地区：[1]中国工程物理研究院流体物理研究所,绵阳621900 [2]电子科技大学光电信息学院,成都610054

出　　处：《激光技术》2012年第5期649-652,共4页Laser Technology

摘　　要：为了提高小波变换在激光干涉测速中的计算速度,分析了小波变换的计算过程,提出了两种快速算法,通过分析对比,选择了一种适合于全光纤位移干涉信号的算法,在相同条件下,对同一信号分别采用常规小波变换和使用快速傅里叶变换的快速方法进行处理。结果表明,采用快速算法的小波变换对信号的处理能力并没有下降,且提高了小波变换的运算效率。这种快速算法用于瞬态位移干涉仪信号处理是行之有效的,可以提高数据处理的速度,有利于小波变换在工程中的应用。In order to improve the efficiency of wavelet transform in laser velocity interferometers, computing course of wavelet transform was analyzed, two kinds of fast wavelet algorithms were put forward. After comparing both the different methods, one was chosen to analyze the all fiber displacement interferometer system for any reflector signals. Signals were processed by means of general wavelet transform and fast wavelet algorithm based on fast Fourier transforamation under the same conditions. Simulation results show that signal processed with the fast wavelet algorithm was not degraded with much faster computation efficiency. It is effective that the fast method can be used to process the all fiber displacement interferometer system for any reflector signals and it can increase the soeed of signal orocessing, which is available in engineering field.

关 键 词：激光技术 快速算法 小波变换 信号处理 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]