单变量递推法莫尔条纹信号误差分离算法.pdfVIP

学兔兔 第33卷 第8期 仪 器 仪 表 学 报 V01．33 No．8 2012年8月 Chinese Journal of Scientific Instrument Aug．2012 单变量递推 法莫尔 条纹信号误差分离算法 徐从裕 (合肥工业大学仪器科学与光电工程学院 合肥 230009) 摘 要：提出一种莫尔条纹信号误差分离算法。该算法假定相邻几个莫尔条纹信号周期内的信号幅值和误差项为恒定值，构 建一组单变量误差分离算式，其中每一个分离算式仅包含有一个莫尔条纹信号误差项，之后将每一个分离算式求解出的独立误 差分离值组合在一起，统一对莫尔条纹信号进行递推修正，当递推修正的误差分离值偏差小于设定值时，递推修正结束，而递推 过程中的所有中间误差分离值之积或之和就是莫尔条纹信号误差的完全分离值。实验表明，上述分离算法简单，分离精度高， 可以同时分离出≥10％不等幅误差值、≥10％直流误差值以及I35。正交误差值等。 关键词：莫尔条纹信号；误差分离；单变量递推算法 中图分类号：TP212．14 文献标识码：A 国家标准学科分类代码：510．20 Separation algorithm for Moir6 fringe signal errors based on single-variable recursive method Xu Congyu (School of Instrument Science and@to—electronic Engineering，Hefei University of Technology，Oefei 230009，China) Abstract：A separation algorithm for Moir6 fringe signal errors is presented．The algorithm assumes that the ampli— tudes and errors of Moir6 fringe signal keeps constant in adjacent several signal cycles，and establishes a group of single—variable error separation formulas，each formula contains only one error term of the Moir6 fringe signa1．Then the error separation values of all separation formulas are combined and the recursive correction to the Moir6 fringe signal is carried out．When the recursively corrected error separation deviations are less than the set values，the re— cursive correction procedure finishes．The precise separation values of Moir6 fringe signal errors are the product or sum of all the intermediate error separation values．Experiments show that the proposed separation algorithm is simple