激光回波信号采集技术

由于激光脉冲信号具有方向性好、抗干扰能力强等优点，激光脉冲成像在高精度测量地表三维信息领域得到广泛应用。激光回波信号采集和处理技术是激光脉冲成像的关键技术。通过对激光回波信号的采集和处理，可以得到地表粗糙度、倾斜度、反射率等信息。本文对已经投入使用的激光雷达的设计思想及实验结果进行分析，对已经采用的激光回波信号采集技术进行了简要回顾，对此技术的发展进行了初步展望。

Research on Laser Echo Acquiring Technique

Because a laser pulse has the features of good direction and anti-jamming, the laser pulse imaging technique is widely used to measure the three-dimensional information of the ground. The laser echo acquiring and processing technique is a key technique in laser pulse imaging. Through the analysis of laser echoes, the information on roughness, gradient and reflection of the ground can be acquired. In this paper, various lidar systems are analysed. The laser echo acquiring techniques which have been used are reviewed. The prospective development of the technique is described to some extent.