Proceedings of the 3rd International Conference on Material, Mechanical and Manufacturing Engineering

High precision capacitance displacement measurement circuit design

Authors
Xuefeng Xing, Jianqiang Li, Shixue Lv, Linlin Xu, Xiaopu Zhang
Corresponding Author
Xuefeng Xing
Available Online August 2015.
DOI
10.2991/ic3me-15.2015.206How to use a DOI?
Keywords
high precision displacement measurement, analog circuit, micro controller
Abstract

A high resolution digital integrated chip capacitor measurement system was designed.The major components of the system mainly includedmain control chip, capacitance transducer, data storage and communication interface.ARM7-based mcro controllerSTM32F207was used as the main control chip, capacitance measurement chip AD7747produced by AD Company with sensitivity can be up to 20 af was used as capacitance transducer. The capacitance measurement range ofAD7747 is -8 pf to +8pf, the maximum common-mode immutable capacitance can reach17 pf anddata update rate range is between 5 Hz to 45 Hz. The absolute error of test circuit was calculated by the fixed capacity test and error analysis. The final results were obtained after subtracting the absolute error, and the final test error is less than 3%.

Copyright
© 2015, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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Volume Title
Proceedings of the 3rd International Conference on Material, Mechanical and Manufacturing Engineering
Series
Advances in Engineering Research
Publication Date
August 2015
ISBN
978-94-6252-100-1
ISSN
2352-5401
DOI
10.2991/ic3me-15.2015.206How to use a DOI?
Copyright
© 2015, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

TY  - CONF
AU  - Xuefeng Xing
AU  - Jianqiang Li
AU  - Shixue Lv
AU  - Linlin Xu
AU  - Xiaopu Zhang
PY  - 2015/08
DA  - 2015/08
TI  - High precision capacitance displacement measurement circuit design
BT  - Proceedings of the 3rd International Conference on Material, Mechanical and Manufacturing Engineering
PB  - Atlantis Press
SP  - 1066
EP  - 1069
SN  - 2352-5401
UR  - https://doi.org/10.2991/ic3me-15.2015.206
DO  - 10.2991/ic3me-15.2015.206
ID  - Xing2015/08
ER  -