AD7715在多通道热电阻精密测量中的应用  

The Application of AD7715 in the Multi-channel Thermal Resistance Measurement

作　　者：许卓[1,2] 杨雷[2] 何志伟[1] 

机构地区：[1]东莞理工学院,广东东莞523808 [2]华南理工大学,广州510641

出　　处：《电测与仪表》2010年第12期16-19,共4页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(100890095)

摘　　要：介绍了一种基于"四线制电阻信号传输和自校正电阻测量法"的测量方法,该方法可以很好的抵消测量电路中的漂移影响,从而保证能取得较高精度的测量结果。在此基础上介绍了AD7715的相关特性,并给出了它与微控制器P89LPC935的应用接口电路以及AD7715相关应用程序。文中给出了实际测试数据。该方法已在实际应用中得到验证是有效的。This paper introduces a measurement method based on the ＂four-wire resistance and self-correction signal transmission resistance measurement＂,the method can well offset the impact of the drift of the measuring circuit,thus ensure high accuracy of measurement results.On the basis of it,the relevant characteristics of AD7715 have been described,and its application of P89LPC935 microcontroller interface circuit and the AD7715-related applications programmers also have been given.This paper presents actual test data.This method has been tested validly in practical application.

关 键 词：AD7715 小信号 P89LPC935 温度测量 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置]