二维PSD非线性修正技术研究  

Study on 2-dimensional PSD non-linear correction techniques

作　　者：管炳良[1] 李星[1] 王俊[1] 

机构地区：[1]中国船舶工业集团公司第六三五四研究所,九江332000

出　　处：《仪器仪表学报》2007年第7期1295-1299,共5页Chinese Journal of Scientific Instrument

基　　金：船舶工业科技预研基金(04J4.4.10)资助项目

摘　　要：本文在总结前人研究成果的基础上,提出适用于非均匀网格的二维PSD离散标定误差修正方法,即改进型双二次插值算法。该算法对双二次插值的系数函数做了修正来适应实际的非均匀网格。测试结果表明经补偿后在PSD中心1 mm范围内示值误差小于2μm。同时,该算法具有和MATLAB内置的双调和样条插值相同的补偿精度甚至更高,但是相对更简单。In this paper, based on the research results of former researchers, the author puts forward 2-dimensional PSD discrete calibration error correction method （i. e. enhanced dual-quadratic interpolation algorithm） , which is suitable for non-uniform grid. To adapt actual non-uniform grid, this algorithm modifies the coefficient function of dual-quadratic interpolation, Test results show that the errors of the displayed values within a radius of I mm from the PSD central point are less than 2 μm. Meanwhile, this algorithm has the same compensation precision as the biharmonic spline interpolation method included in MATLAB software, but is simpler than the latter.

关 键 词：二维PSD 非线性修正 改进型双二次插值 

分 类 号：TN15[电子电信—物理电子学]