基于PID神经网络的热电偶数学模型研究

摘要

为提高热电偶的测温精度,首先介绍了热电偶测温数据处理的一般情况,在总结对比现有方法的优缺点基础上,对如何选取热电偶标定点的问题进行研究。设计了实际多路电偶数据采集电路,并对采集的数据进行了分析处理,运用PID神经网络建立热电偶的数学模型。通过实验验证,这种方法的测温精度较高,能满足实际对宽范围高精度的温度测量需要。%In order to improve the measurement precision of thermocouple,at first the general temperature data processing procedure which stems from the thermocouple is introduced.On the base of summing up exsiting methods,the problem is studied on how to select the special points of thermocouple.And a system is designed to collecting multichannel temperature data.By means of analysing the data,the mathematical model of thermocouple is founded.Proved by experiments,this method increases the temperature measurement precision and fits to actual request,which is wide rang with high pricise.