| 基于PN结的热电偶补偿电路设计 |
| |
| 引用本文： | 包晔峰,单明东,杨可,蒋永锋. 基于PN结的热电偶补偿电路设计[J]. 电子测量技术, 2010, 33(11): 10-13 |
| |
| 作者姓名： | 包晔峰 单明东 杨可 蒋永锋 |
| |
| 作者单位： | 河海大学,机电工程学院,常州,213022 |
| |
| 摘 要： | 热电偶在温控系统中得到了广泛应用,但在实际测温过程中对热电偶的冷端补偿是必不可少的。分析了几种常用的热电偶冷端补偿方法的优缺点,根据1N4148在恒流条件下其管压降与温度的线性关系设计了一种基于PN结的热电偶冷端补偿电路,该补偿方法具有成本低、精度高、通用性强等优点,该电路可以对不同型号的热电偶进行冷端补偿,同时具有断偶检测功能。对E型热电偶进行了冷端补偿试验,结果表明,该补偿电路对热电偶冷端补偿后使得温度偏差≤1℃。
|
| 关 键 词： | 热电偶 冷端补偿 PN结 恒流源 断偶检测 |
Design of thermocouple compensation circuit based on PN junction |
| |
| Bao Ye-feng,Shan Ming-dong,Yang Ke,Jiang Yong-feng. Design of thermocouple compensation circuit based on PN junction[J]. Electronic Measurement Technology, 2010, 33(11): 10-13 |
| |
| Authors: | Bao Ye-feng Shan Ming-dong Yang Ke Jiang Yong-feng |
| |
| Affiliation: | Bao Yefeng Shan Mingdong Yang Ke Jiang Yongfeng(College of Electronic and Mechanical,Hohai University,Changzhou 213022) |
| |
| Abstract: | The thermocouple had been widely used in the temperature control system,but the cold junction compensation circuit must be used in actual application.The advantages and disadvantages of the several thermocouple cold junction compensation methods were described in this article,the relationship between the 1N4148's Forward Voltage and Junction Temperature is linear when the constant current flows the diode,according to the relationship,a thermocouple cold junction compensation circuit based on the PN junction... |
| |
| Keywords: | thermocouple cold junction compensation PN junction constant current source thermocouple's rupture detection |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
