物理学报Issue(9)：242-248,7.DOI:10.7498/aps.62.094215
米散射激光雷达重叠因子及全程回波信号标定技术研究*
Investigation on the correction of the Mie scattering lidar’s overlapping factor and echo signals over the total detection range∗
摘要
Abstract
There has been great difference between the theoretical signals of the lidar’s echo and its actual signals, due to the angles between the laser beam and its receiving optical axis, and the laser intensity distribution being asymmetrical. So the correction of the echo signal is necessary. According to the mathematical derivation and the software simulation, the mathematical expression of the lidar’s overlap factor is given, and the overlap factor curves with detection range are drawn which express the characters over the total detection range, then the best angle between lidar’s emitting axis and the receiving axis is obtained. The overlap factors are analyzed when the laser is Gaussian with a uniform intensity distribution. The lidar distance correction signal and Klett formula are corrected by the overlap factor, and the instrument parameters of the lidor are measured. In the range where the overlap factor is not zero, its correction echo signals and extinction coefficients can be obtained by using the corrected Klett formula. While in the range of the lidar’s blind zone, the signals can be derived by a slope method. Finally, the total correction curve of the extinction coefficients is gained, and it is in accordance with the actual one correction cuive.关键词
激光雷达/标定/重叠因子/消光系数Key words
lidar/correction/overlap factor/extinction coeffients引用本文复制引用
狄慧鸽,华灯鑫,王玉峰,闫庆..米散射激光雷达重叠因子及全程回波信号标定技术研究*[J].物理学报,2013,(9):242-248,7.基金项目
国家自然科学基金(批准号:41027004,61275185)、教育部高等学校博士学科点基金(批准号:20106118120005)和陕西省自然科学基金(批准号:2012JQ5002)资助的课题.*Project supported by the National Natural Science Foundation of China (Grant Nos.41027004,61275185), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No.20106118120005), and the Natural Science Foundation of Shanxi Province, China (Grant No.2012JQ5002) （批准号:41027004,61275185）
