热电偶冷端温度硬件补偿方法

Hardware Compensation Ways of Cold-junction Temperature in Thermocouple

测温过程中,要使热电势和所测温度是单值函数关系,必须进行冷端温度补偿.文中介绍了几种硬件冷端补偿方法及其原理.实际应用表明此方法具有电路简单、可靠性高等特点.

In the process of measuring temperature, the cold-junction temperature must be compensated so that the thermoelectric potential is a single function of temperature measured. In this paper, some hardware compensation ways and its principles are introduced in details. And in practice, these ways are noted for their simple circuit and high reliability.