半导体光电, 2011, 32 (2): 276, 网络出版: 2012-01-04
全光纤多普勒测速系统的研究
Study on All Fiberoptic Laser Doppler Velocimeter
激光测速 光纤 多普勒效应 迈克尔逊干涉仪 傅里叶变换 laser velocimeter optical fiber Doppler effect michelson interferometer fast fourier transform
摘要
为了验证全光纤多普勒测速系统的低速响应能力,采用窄带光纤激光器、准直透镜等器件搭建了一套迈克尔逊干涉仪结构的全光纤多普勒测速系统,分析了其测速的基本原理,并对喇叭振动进行了测试。采用快速傅里叶变换对信号进行处理,解调结果表明,该系统对低速响应灵敏,能够有效地测量出喇叭膜片振动速度,最低可测速度在1mm/s以下,速度分辨率可达0.1mm/s。
Abstract
A fiberoptic laser Doppler velocimeter based on Michelson interferometer was described and constructed with fiber laser and fiber collimator. In the experiment of measuring the weak vibration of loudspeaker, good agreement was observed between the fibervelocimeter and the driving signal. The experiment data dealt with FFT method shows that this system is capable of resolving the velocity less than 1mm/s,and the resolution is about 0.1mm/s.
谭朝勇, 叶欣, 胡永明. 全光纤多普勒测速系统的研究[J]. 半导体光电, 2011, 32(2): 276. TAN Chaoyong, YE Xin, HU Yongming. Study on All Fiberoptic Laser Doppler Velocimeter[J]. Semiconductor Optoelectronics, 2011, 32(2): 276.