摘要
根据激光多普勒效应设计了一套可判断流体方向的双激光束流速测量装置。该装置由核心处理器STC89C52、LF356放大器、He-Ne激光器以及光电探测器等构成,通过光电探测器探测到的信号经A/D转换后传给单片机,单片机利用快速傅里叶变换找到信号峰值处所对应的拍频fd,根据频移公式算出速度值,再由液晶显示器将速度值显示出来。
This paper designs a fluid velocity measuring device of double lasers which fluid direction can be distinguished based on laser Doppler effect. The device is made up of core processor STC89C52, LF356 amplifier, He - Ne laser and photoelectric detector etc, The signal received by photoelectric detector is passed to MCU through the A/D conveaor. The MCU find the beat fd corresponding to the signal peak location by Fast Fourier Transform. According to the frequency shift formula the speed value is calculated. At last the value is shown on the liquid crystal display.
出处
《山西电子技术》
2014年第1期6-7,共2页
Shanxi Electronic Technology
基金
基于3G无线网络的可吸入颗粒物检测仪研制(TZ201316)
大气湍流模拟装置的压强与温度实时监测(xj2012050)
基于单片机的激光多普勒效应测速研究(xj2012052)
关键词
激光多普勒效应
快速傅里叶变换
双激光束
光电探测器
the laser Doppler effect
Fast Fourier Transform
double laser beam
photoelectric detector
