节点文献
激光自混合变速测量的离散Chirp-Fourier变换方法
Discrete Chirp-Fourier Transform method for time-varying velocity measurement by self-mixing laser diode
【Author】 ZHANG Zhao-yun 1,2,GAO Yang 1,3,ZHAO Xing-hai 1,ZHAO Xiang 1,2 (1 Institute of Electronic Engineering,China Academy of Engineering Physics,Mianyang 621900,China;2 Department of Graduate Student,China Academy of Engineering Physics,Beijing 100088,China;3 Key Laboratory of Optoelectronic Technology and System,Chongqqing University,Chongqing 400044,China)
【机构】 中国工程物理研究院电子工程研究所; 重庆大学光电技术及系统教育部重点实验室;
【摘要】 对激光自混合用于变速运动物体的速度测量进行了探索。建立了激光自混合用于变速测量的数学模型;提出了基于该模型的特征参量提取方法,该方法基于离散Chirp-Fourier变换理论。对激光自混合输出信号进行离散Chirp-Fourier变换,变换结果的主瓣坐标反映了物体运动的速度及加速度信息。仿真试验证明:该方法在较低信噪比的情况下仍能有效提取物体的速度及加速度信息。
【Abstract】 Time-varying velocity measurement by self-mixing laser diode is explored.A mathematics model was proposed for the time-varying velocity measurement by self-mixing laser diode.Based on this model,a Discrete Chirp-Fourier Transform(DCFT) method was applied.The coordinates of the main lobe show the target’s velocity and acceleration information.The simulation results prove the validity of the algorithm even in the situation of low SNR.
【Key words】 Time-varying velocity measurement; Discrete Chirp-Fourier Transform; Fast Fourier transform; Self-mixing interference; Laser measurement;
- 【会议录名称】 中国光学学会2010年光学大会论文集
- 【会议名称】中国光学学会2010年光学大会
- 【会议时间】2010-08-23
- 【会议地点】中国天津
- 【分类号】TN248
- 【主办单位】中国光学学会