Research of Impedance Measurement System based on Adaptive Feedback Calibration Method

被引：0
|
作者：
Chen, Xiaoyan [1 ]
Li, Shudong [1 ]
Han, Fengze [1 ]
Du, Meng [1 ]
机构：
[1] Tianjin Univ Sci & Technol, Coll Elect Informat & Automat, Tianjin, Peoples R China
来源：
PROCEEDINGS OF 2019 IEEE 3RD INFORMATION TECHNOLOGY, NETWORKING, ELECTRONIC AND AUTOMATION CONTROL CONFERENCE (ITNEC 2019) | 2019年
基金：
中国国家自然科学基金;
关键词：
portable measuring instrument; AD5933; switch array; adaptive feedback calibration; complex circuit;
D O I：
10.1109/itnec.2019.8729016
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
A portable measuring instrument based on micro-controller is designed in this paper. An impedance conversion chip AD5933 featured as high precision is considered to be the measuring sensor. A switch array consisting of micro-relays and high-precision resistors is devised to carry out system calibrating and range switching automatically by proposed adaptive feedback calibration approach. The test results show that the system presents satisfied accuracy and good stability with SNR 72.8dB within 1 similar to 100kHz and lower relative measurement error to 0.54%. within 0.02 similar to 200k Omega. The measuring results of a complex circuit is verified to be coincide with the ideal curve. This paper provides an innovative method for fast and stable impedance measurement.
引用
收藏
页码：1521 / 1525
页数：5
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