铂电阻测温仪表的简化设计与非线性补偿

The Simplified Design of Pt Resistance Temperature Instrument and Non-linear Compensation

从目前常规数显仪表普遍采用的模式中,逆向思维提出一种测量温度的新颖方案;使基准电压按照铂热电阻的非线性规律变化,而使输出的数字量准确反映引起铂热电阻阻值变化的温度值.具体介绍了这一设计思想的实施和计算,并提出了几点注意事项以及多年现场应用结果.

According to the common used modes in conventional digital display instruments a novel strategy of temperature measurement is stated by the reversal thinking, i. e. to make the reference voltage to be changed based on the nonlinear regulation of the Pt resistance, thus the output digital quantities reflect exactly the temperature which caused the change of the Pt resistance. The implementation and calculation of the design concept are introduced concretely and some cautions are presented. The results of on-site application are also given.