The liquid level measurement of ultra low temperature cylinder based on the relative capacity method

DOI

10.2991/nceece-15.2016.189How to use a DOI?

Keywords

Liquid Nature Gas (LNG); capacitance signal; liquid level measurement; processing circuit .

Abstract

The probe and measurement circuit for the liquid level measurement of ultra low temperature cylinder was designed. Liquid Nature Gas( LNG) sensor is a coaxial capacitance sensor which was used with the material of 304 stainless steel. Teflon was used as an insulating material to isolate the stainless steel sleeve and to realize the coaxial positioning. The circuit was designed based on 7555 timer and STM32 chip, combining the embedded technology to convert the capacitance of the sensor to the pulse signal output. the height and fuel allowance were calculated based on relative capacity method. The experimental results shows that the measuring circuit can converted the capacitance signal of the sensor to pulse signals reliably and stably, the expected measurement accuracy is less than 0.6 % .

Copyright

© 2016, 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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TY  - CONF
AU  - Dangjuan Li
AU  - Tang Liu
AU  - Shenjiang Wu
AU  - Huan Xu
AU  - Bin Wu
PY  - 2015/12
DA  - 2015/12
TI  - The liquid level measurement of ultra low temperature cylinder based on the relative capacity method
BT  - Proceedings of the 2015 4th National Conference on Electrical, Electronics and Computer Engineering
PB  - Atlantis Press
SP  - 1061
EP  - 1066
SN  - 2352-5401
UR  - https://doi.org/10.2991/nceece-15.2016.189
DO  - 10.2991/nceece-15.2016.189
ID  - Li2015/12
ER  -