| 热电偶冷端补偿改进研究 |
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| 引用本文： | 张海涛,罗珊,郭涛.热电偶冷端补偿改进研究[J].仪表技术与传感器,2011(7). |
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| 作者姓名： | 张海涛 罗珊 郭涛 |
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| 作者单位： | 解放军理工大学工程兵工程学院,江苏南京,210007 |
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| 摘 要： | 在对现有热电偶测温冷端补偿电路进行分析的基础上,提出基于内置高精度温度传感器的模数转换芯片ADS1224的解决方案.为了提高精度和简化电路,将冷端测温电路与热电偶回路分离,冷端温度和热电偶电动势被独立进行测量,然后利用软件计算获得精确的热电偶工作端温度.同时文章也讨论了提高冷端温度测量精度的设计.实际应用说明该方案使得电路结构得到进一步优化,具有结构简单、成本低、精度高、稳定性高和抗干扰能力强等优点,具有推广价值.
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| 关 键 词： | 热电偶 冷端补偿 ADS1224 |
Improvement of Cold-conjunction Compensation of Thermocouple |
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| ZHANG Hai-tao,LUO Shan,GUO Tao.Improvement of Cold-conjunction Compensation of Thermocouple[J].Instrument Technique and Sensor,2011(7). |
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| Authors: | ZHANG Hai-tao LUO Shan GUO Tao |
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| Affiliation: | ZHANG Hai-tao,LUO Shan,GUO Tao(Engineering Institute of Corps of Engineers,PLA University of Science and Technology,Nanjing 210007,China) |
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| Abstract: | On the basis of discussing cold-conjunction compensation of thermocouple measurement circuit,an improving solution was provided which was based on the A/D converter ADS1224 with internal high accuracy temperature sensor.The absolute cold-conjunction temperature was measured separately.At last the temperature of heating-conjunction of thermocouple was calculated through software.The circuit,suiting to any types of thermocouple,is more optimized and the temperature is measured more accurately.The solution has... |
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| Keywords: | thermocouple cold-conjunction compensation ADS1224 |
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