摘要
】在采用热电偶测温时，为了实现准确测量，必须采取措施使冷端温度保持不变或补偿冷端温度的变化。在工业应用中，热电偶冷端处于环境温度中，常采用几种补偿电路对冷端温度进行补偿。本文提出了一种新型的冷端温补桥路，使用该桥路时无需使用补偿导线。实验结果表明，该桥路可以较高的准确度实现冷端温补。
To make accurate temperature measurements with thermocouples, the cold junction temperature must remain constant, or, if it varies, suitable compensation for these varitions must be provided. With the cold junctions at ambient temperature, there are several kinds of circuit used for cold junction compensation in industrial applications. In this paper, a new bridge circuit for cold junction compensation, in which extension wire is not needed, is proposed. The results of experiments show that cold junction compensation can be achieved with relatively high accuracy.
出处
《仪表技术与传感器》
CSCD
北大核心
1999年第3期33-35,共3页
Instrument Technique and Sensor
关键词
温度测量
热电偶
冷端温度补偿
Temperature Measurement, Thermocouple, Cold Junction Compensation
