J4 ›› 2012, Vol. 25 ›› Issue (2): 72-75.doi: 10.3976/j.issn.1002-4026.2012.02.015

• 目录 • 上一篇    下一篇

高精度温度测量电路设计

刘孟德1,2,贺海靖2,杜立彬2   

  1. 1.哈尔滨工业大学,黑龙江 哈尔滨 150001; 2.山东省科学院海洋仪器仪表研究所,山东 青岛 266001
  • 收稿日期:2011-11-23 出版日期:2012-04-20 发布日期:2012-04-20
  • 作者简介:刘孟德(1964-),男,博士,研究员,研究方向为精密仪器。

Design of a high precision temperature measurement circuit

 LIU Meng-De1,2, HE Hai-Jing2, DU Li-Bing2   

  1. 1.Harbin Institute of Technology, Harbin 150001, China; 2.Institute of Oceanographic Instrumentation, Shandong Academy of Sciences, Qingdao 266001, China
  • Received:2011-11-23 Online:2012-04-20 Published:2012-04-20

摘要:

      针对海洋环境监测中广泛应用的铂电阻和热敏电阻温度传感器,设计了一种以恒流源激励的温度测量电路,解决了因传感器自加热和恒流源波动产生的测量误差。经现场测试,温度测量的精度、一致性都达到设计要求,满足海洋环境监测的实际应用需要。

关键词: 铂电阻, 热敏电阻, AD7793

Abstract:

       We design a high precision temperature measurement circuit excited by a constant current source with RTD and thermistor commonly employed in ocean environment detection. We also reduce the measurement error caused by current variation and self heating. Scene test shows that the circuit satisfies the requirement of ocean environment  detection.

Key words: RTD, NTC thermistor, AD7793

中图分类号: 

  • TP216