物理学报Issue(12)：1-9,9.DOI:10.7498/aps.64.120601
机载多脉冲激光测距特性及其不确定度研究∗
Ranging characteristic and uncertainty of airb orne multi-pulse laser
摘要
Abstract
Under the special environment of airborne platform, the theoretical model is built based on probability characteristic of laser ranging, and the probability density distribution functions of pulse-echo signal envelope under different signal-to-noise ratios (SNRs) are obtained. The theoretical results show that the decrease of SNR causes different distributions of ranging data through echo wave characteristic. The experimental data present Gauss distribution with larger SNR, or Rayleigh distribution with poor SNR, or Rice distribution with general condition. According to the constant-ratio timing method, experimental results verify the rationality of theoretical model under a number of ranging data. When the ranging accuracy defined by variance is not applicable, the concept of uncertainty of measurement is introduced. Combined with the theory of uncertainty, a new method of evaluating airborne laser ranging performance is put forward. This method could overcome the unity and irrationality of traditional evaluating method, and meanwhile, it could provide an important reference for evaluating and testing airborne optoelectronic system performance.关键词
多脉冲激光/恒比定时法/信噪比/不确定度Key words
multi-pulse laser/constant-ratio timing method/signal-noise ratio/uncertainty引用本文复制引用
寇添,王海晏,王芳,吴学铭,王领,徐强..机载多脉冲激光测距特性及其不确定度研究∗[J].物理学报,2015,(12):1-9,9.基金项目
国家自然科学基金(批准号:61172083)资助的课题.* Project supported by the National Natural Science Foundation of China (Grant No.61172083) （批准号:61172083）
