基于单片机分段线性插值算法实现摘要：分段线性插值算法是一种技术比较成熟、实现比较简单的低次多项式插值算法，其曲线逼近程度即插值函数与原函数误差基本满足一般的工业控制场合需要。该算法占用系统资源少，在数据采集和数据处理等工业控制领域，往往使用单片机或嵌入式系统等资源受限处理器，通过分段线性插值算法简化原函数，减少计算量，对于提高系统整体性能具有显著的现实意义。关键词：分段线性插值；曲线逼近；函数；工业控制；单片机中图分类号：TP301文献标识码：A文章编号:1009-3044(2012)21-5236-02TheImplementationofPiecewiseLinearInterpolationAlgorithmBasedonMCSLIANGXiao-lei(UNIT69046,Urumqi830001,China)Abstract:Piecewiselinearinterpolationalgorithmisarela-tivelymaturetechnologyandarelativelysimplelow-orderpoly-nomialinterpola?tionalgorithm,thecurveapproximationde-greeoftheinterpolationfunctionandtheoriginalfunctionbasi-callymeetgeneralindustrialcon?trolapplicationsneed・Thealgorithmoccupieslesssystemresourcesinindustrialcontrolfieldsuchasdataacquisitionanddataprocessing,es?peciallyinthesystembasedonamicrocontrollerorembeddedsystemandsoon.Usingpiecewiselinearinterpolationalgorithmtosimplifytheoriginalfunctionandtoreducethecomputation,ithassignificantpracticalsignificanceforimprovingtheoverallperformanceofthesys?tern・Keywords:piecewiselinearinterpolation;curveapproxi-mation;function;industrialcontrol;MCS程序主要部分包括两部分：单区间线性计算和全程线性插值计算。部分代码如下所示。单区间线性计算：CharIiner_seg_x8_y8(charxn,charx1,charx2,chary1,chary2){intyn;Chartmp;If(xnx2){yn=y2}Else{if(yi