Study on wet sensitive characteristics of Colpitts oscillation circuit

DOI

10.2991/emeit.2012.426How to use a DOI?

Keywords

dew point measurement, Colpitts circuit, quartz crystal

Abstract

Based on the phenomenon that Colpitts circuit cannot drive quartz crystal in liquid phase environment, this paper studies the wet sensitive characteristics of Colpitts oscillation circuit. And we designed a device used as humidity sensor. Peltier element was used to cool quartz crystal until dew occurred and quartz crystal worked in the liquid environment. Colpitts circuit stopped oscillation when dew occurred. At the same time the tem-perature of crystal surface was measured and the temperature was approximately regarded as the dew point. Through the theoretical analysis of Colpitts circuit characteristic and the humidity sensing properties of quartz crystal admittance, then combined with experimental data comparison, the wet sensitive characteristics of Colpitts circuit was proved to be feasible and accurate for dew point recognition from the qualitative point. The result is of practical importance for further quantitative analysis and developing sensitive circuit type dew point instrument.

Copyright

© 2012, 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  - Shuo Wang
AU  - Xiaofeng Meng
AU  - Guohua Wang
AU  - Rui Zheng
AU  - Yang Lv
PY  - 2012/09
DA  - 2012/09
TI  - Study on wet sensitive characteristics of Colpitts oscillation circuit
BT  - Proceedings of the 2nd International Conference on Electronic & Mechanical Engineering and Information Technology (EMEIT 2012)
PB  - Atlantis Press
SP  - 1927
EP  - 1931
SN  - 1951-6851
UR  - https://doi.org/10.2991/emeit.2012.426
DO  - 10.2991/emeit.2012.426
ID  - Wang2012/09
ER  -