基于实验室全波形激光雷达系统的目标反射率估计

In this study, a full waveform LiDAR system was built to obtain the returned waveforms of complex characteristics, thus the reflectivity of the objects can be deduced from the full waveforms of the returned signal. The full waveform LiDAR system was lab-built including the laser with 1064nm, photodetector, focusing mirror and data acquisition system. The data acquisition system contains a high-speed digitizer and a control unit which were programmed and controlled under the LabView environment. The experiments using the full waveform LiDAR system were implemented on three objects which were the rough paper, the glossy paper and a piece of fabric. A method of direct measurement was used to calculate the reflectivity of these three targets. The energy of the transmitted pulse and the returned pulse collected from the three kinds of objects were estimated from the waveforms filtered by Gaussian filter. The reflectivity of three kinds of objects can be calculated based on the formula of direct measurement method. The results show that the reflectivity calculated were coincidence with the physical facts.