光学技术, 2007, 33 (2): 0281, 网络出版: 2010-06-03
时频分析在激光多普勒信号处理中的应用
Application of time-frequency analysis in laser Doppler signal processing
摘要
建立了用来检测微机电系统谐振器面内运动的激光差动多普勒系统,测量了谐振器的振动速度。在信号处理过程中,首先使用电路系统去除高频载波成分,然后基于Matlab平台,选取时频分析中的Wigner-Ville分布对采集进入计算机的多普勒信号进行分析。提取了其中的速度信息,并与用计数法处理的结果进行了比较。结果表明具有较好的效果。
Abstract
A differential laser Doppler system is built to measure the in-plane movement of micro-electro-mechanical systems (MEMS),and the vibration of a MEMS resonator has been measured. In the signal processing,removed by using a circuit,the high frequency carrier is first the Wigner-Ville distribution of time-frequency analysis is used to analyze the Doppler signal and extract the velocity. Compared with the result of the counting method,the time-frequency is more effective.
钟莹, 张国雄, 张涛, 冷长林. 时频分析在激光多普勒信号处理中的应用[J]. 光学技术, 2007, 33(2): 0281. ZHONG Ying, ZHANG Guo-xiong, ZHANG Tao, LENG Chang-lin. Application of time-frequency analysis in laser Doppler signal processing[J]. Optical Technique, 2007, 33(2): 0281.