用AD5933实现电导率测量的研究  

Study on Using AD5933 to Realize Impedance Measurement

作　　者：崔传金[1] 郭志强[1] 赵楠[1] 左月明[1] 

机构地区：[1]山西农业大学工程技术学院,山西太谷030801

出　　处：《机电工程技术》2008年第4期44-47,共4页Mechanical & Electrical Engineering Technology

基　　金：山西省出国留学基金项目(编号:98064)

摘　　要：本文应用美国Analog Devices公司最新推出的阻抗测试芯片AD5933实现了电导率的测量。通过设计测试电路,选择适当的标定数据(已知阻抗),计算出增益因子,完成了测试芯片的标定。并通过测试被测物的电阻对溶液电导率的测量进行了模拟研究,结果表明在一定的范围内测量相对误差较小。应用AD5933来实现电导率的测量,不仅可降低测量成本,而且能使测量操作较为简便,从而提高测量的精度和效率。其试验结果和方法可用于新型的低成本、高精度电导率仪器的设计与制造。AD5933 is a new chip for impedance testing which is produced by the American company Analog Devices.By designing test circuit,choosing suitable calibration values(known impedance),the author has calculated the gain factor and finished the calibration of AD5933.This paper simulates the liquor conductivity measurement through testing the resistance.The results shows that the test relative error is small in a suitable impedance range,it is not only saving cost,but also very easy to operate to use AD5933 for conductivity testing,it can improve the test accuracy and efficiency.The results and method can be used in designing and producing low cost,high accuracy conductivity meters.

关 键 词：AD5933 电导率 测量 

分 类 号：TH832[机械工程—仪器科学与技术]