Analysis of Mechanism of Dew Point Measurement Using a Colpitts Oscillation Circuit

DOI

10.2991/iccmcee-15.2015.162How to use a DOI?

Keywords

Colpitts circuit; Dew point; Quartz crystal model.

Abstract

In this paper, based on the phenomenon that Colpitts oscillation circuit is hard to work when condensation occurs on the surface of the quartz crystal, a new dew point measurement device is developed, and it is mainly composed of a quartz crystal and a Peltier module. This measurement way is both rapid and reversible compared to the traditional methods. Wet sensitive characteristics of the quartz crystal, which is regarded as the humidity sensing element in Colpitts oscillator, is analyzed. The electrical parameters of the quartz crystal are changed due to proactive condensation, then vibration of oscillator will stop if the magnitude of the reactance of the quartz crystal is lower than the reactance threshold of the Colpitts circuit. Combining the theoretical analysis with experiment data, it indicates that the Colpitts circuit is feasible to measure dew point.

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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TY  - CONF
AU  - Qiang Wang
AU  - Xiaofeng Meng
AU  - Yi Yang
PY  - 2015/11
DA  - 2015/11
TI  - Analysis of Mechanism of Dew Point Measurement Using a Colpitts Oscillation Circuit
BT  - Proceedings of the 2015 4th International Conference on Computer, Mechatronics, Control and Electronic Engineering
PB  - Atlantis Press
SP  - 877
EP  - 882
SN  - 2352-5401
UR  - https://doi.org/10.2991/iccmcee-15.2015.162
DO  - 10.2991/iccmcee-15.2015.162
ID  - Wang2015/11
ER  -