一种基于函数型的热电偶非线性校正方法  

A method of nonlinear correction of thermocouple based on function

作　　者：何晓文[1] 周雪纯[1] 

机构地区：[1]中国飞行试验研究院,陕西西安710089

出　　处：《电子设计工程》2016年第4期59-61,共3页Electronic Design Engineering

摘　　要：由于热电偶的输出信号只有几十毫伏,并且存在较大的非线性,因此测温时需要进行非线性校正。热电偶的非线性校正方法多种多样,以K型热电偶为例,介绍一种基于函数型的热电偶非线性校正方法,可将热电偶1%左右的非线性误差降至0.2%以内,具有校准精度高、实时性好等特点,该方法可广泛应用于各种类型热电偶的非线性校正电路中。The output signal of the thermocouple was only a few tens of millivolts, due to its large nonlinear, so the result must be corrected. There are various corrected methods of thermocouple, K type as an example, the method based on the function is introduced, the nonlinearity error from 1% down to 0.2% or less, it has high precision, good real-time, and it is also applicable to correction method of other types of thermocouples nonlinear. The method can be widely used in various types of the thermocouple non-linear correction circuit.

关 键 词：函数 热电偶 非线性特性 校正电路 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]