数字采集系统非线性在线补偿的样条插值法

NONLINEAR COMPENSATION ON LINE BY MEANS OF SPLINES INTERPOLATION FOR DATA ACQUISITION SYSTEM

本文介绍了在微机检测通道中采用的一种非线性补偿样条插值法。该方法采用了样条插值函数,从而使插值性能同时具有高次插值光滑性好与低次分段插值计算简单,稳定逼近性好,无Range现象的优点。文中介绍的基点整定方法可以对从一次仪表开始,包括变送仪表,模入通道等所有环节在内的非线性进行统一的补偿。经实践证明,该方法简明,效果优良。

This paper introduces a nonlinear compensating splines interpolating method used in microcomputer detecting devices. The method, adopting a splines interpolating function, not only provides a greater smoothness of high order interpolation, but also has the advantage of calculating simplicity, better stable approach property and no Range phenomenon of low order section interpolation. The base fix method presented in this paper can compensate all unlinear links from the first device to the transformer and analog passage. The experiments have proved that this method is simple, practical and highly effective.