基于红外被动测距的基线拟合算法研究  

Study on baseline fitting method based on passive infrared range measurement

作　　者：宗鹏飞[1,2] 王志斌[1,2] 张记龙[1,2] 陈媛媛[1,2] 

机构地区：[1]中北大学山西省光电信息与仪器工程技术研究中心,太原030051 [2]中北大学仪器科学与动态测试教育部重点实验室,太原030051

出　　处：《激光技术》2013年第2期174-177,共4页Laser Technology

基　　金：国家自然科学基金资助项目(61040062;61127015);国家国际科技合作资助项目(2012DFA10680)

摘　　要：为了实现红外光谱被动测距技术的准确测距以及透过率的精确计算,采用插值法进行了基线拟合算法研究。以氧气A带为例,利用逐线积分计算出A吸收带两边的带外数据,采用多种插值拟合方法来拟合,进行了详细的理论分析和仿真验证。通过几种拟合结果的对比,多项式插值拟合取得了比较好的结果,拟合精度最高。结果表明,多项式插值拟合基线算法为建立透过率和距离等条件的数据库提供了方法,为被动测距的实时测量提供了坚实的基础。In order to measure the range accurately and calculate the transmittance precisely with infrared spectrum passive ranging technology, baseline was fitted with interpolation method. Taking oxygen A band as an example, baseline fitting was completed through a variety of interpolation fitting methods making use of both sides of the absorption data from line-by-fine radiative transfer model. Meanwhile, detail theoretical analysis and simulation verification were carried out, after comparing several algorithms, the accuracy of polynomial interpolation fitting is the best. The implementation of baseline fitting algorithm provides method for establishing a database of transmittance, distance and other conditions and provides a solid foundation for realization of passive ranging.

关 键 词：光谱学 氧气A带 基线拟合 逐线积分 

分 类 号：O433.4[机械工程—光学工程]