The Linearity Compensation Circuit Design Of Accurate Temperature Measurement
The larger and heavier of a device ,the bigger the thermal inertia after heating through industrial control ,which results in the generated temperature after heating lagging behind the desired one so as to affect its accuracy.This is an important factor that the heating accuracy of a large-sized device cannot be improved,and also a difficult problem that puzzles designers all the time.As to some thermocouple,software has been developed to compensate and modify it artificially.But it is difficult for this kind of software compensation to be suitable for all thermocouples since they vary in parameters.To find a better way of compensation,the author finally found the existing relationships among thermoeouple,thermoelectric potential and temperature by studying thermocouple carefully.The real-time,linear and optimal design is realized by using operational amplifiers to compute high-order power series functions,and in this way the above mentioned problem has been solved and the accuracy of measurement has been improved extensively.The design totally meets the wide-ranged and accurate temperature control through the application to the injection molding machine and the result is satisfying.
Thermocouple Linearity Compensation Circuit Thermoelectric Potential
Anan Fang Xiaoli Ye Qingwu Lai An Zhao
Electronic Department,Nanchang University,Nanchang,Jiangxi 330031,China
国际会议
大连
英文
1450-1453
2008-07-27（万方平台首次上网日期，不代表论文的发表时间）