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一、概述围绕热电偶参考端补偿问题,相继出现了各类补偿器。常用的桥路铜补偿电阻、集成电路补偿块等多属于模拟热电势的方法。本文所介绍的“参考端热偶式补偿器”则直接利用热电偶的热电特性,对相同型号热电偶的参考端进行补偿。二、设计思想从热电偶的热电势公式 E[T_1,T]=E[T_1,0]-E[T,0] (1) 可以得到: E[T,0]:E[T_1,0]-E[T_1,T] (2)式中,T_1—工作端温度,T—参考端温度。从式(2)可知,热电偶参考端热电势(需补偿之电势)等于T_1相应的热电势与热电偶输出热电势之差。假设在恒定的T_1下,有一稳定的电势E[T_1,0],则热电偶参考端电势可以通
First, an overview Around the thermocouple reference side of compensation, have appeared in various types of compensator. Common bridge copper compensation resistors, integrated circuit compensation blocks and more belong to the analog thermoelectric power method. The “reference junction thermocouple” described in this article directly utilizes the thermoelectric properties of the thermocouple to compensate for the reference junction of the same type of thermocouple. Second, the design idea From the thermocouple thermoelectric power equation E [T_1, T] = E [T_1,0] -E [T, 0] (1) can be obtained: E [T, 0]: E [T_1,0] -E [T_1, T] (2) Where, T_1-working end temperature, T-reference end temperature. From equation (2), the thermocouple thermocouple reference potential (the potential to be compensated) is equal to the difference between the thermocouple corresponding to T_1 and the thermocouple output thermoelectric potential. Assuming constant T_1, there is a stable potential E [T_1,0], then the potential of the thermocouple reference terminal can pass