FFT在激光测距系统中的应用

FFT in Laser Distance Measuring System Application

文章从激光的特点和原理出发,简要介绍了相位法激光测距的基本原理,着重突出了FFT(快速傅里叶变换)在高精度中短距离测量上的应用以及在本系统中的优势,从理论上论证了FFT的原理,提出了在DSP上实现FFT的方法。在文中的末尾给出了该方法的误差,并且分析了误差来源,提出了减小误差的方法,提高了系统的测量精度和稳定性。

This article embarks from the laser characteristic and the principle.Introduced briefly the phase method laser ranging basic principle, has highlighted FFT emphatically（the fast Fournier transformation） in the high accuracy mid-and short distance survey application as well as in this system superiority, theoretically has proven the FFT principle, proposed realizes the FFT method on DSP.Has given this method error in article end, and has analyzed the error source, proposed reduced erroneous the method to increase the system measuring accuracy and the stability.