Dew point and relative humidity smart measuring system

Author

Postolache, O. ; Girão, P. ; Pereira, M. ; Banha, C. ; Ramos, Helena

Author_Institution

Instituto de Telecomunicacoes, Lisboa, Portugal

Volume

1

fYear

2004

Firstpage

82

Abstract

In the present article, the design and implementation of a dew point (T_DP) smart measuring system characterized by high accuracy and repeatability is presented. The system implements also a relative humidity sensing structure based on the acquired data associated to dew point and ambient temperature measuring channels. The main elements of the measuring system include an optical system based on a bifurcated fiber bundle, a mirror, a laser diode and a narrow band optical detector. Mirror cooling is made using a current mode powered Peltier heat pump. The current control is performed using a data acquisition board programmed with LabVIEW software.

Keywords

electric current control; heat pumps; humidity measurement; humidity sensors; mirrors; semiconductor lasers; virtual instrumentation; LabVIEW software; ambient temperature measuring channels; bifurcated fiber bundle; current mode powered Peltier heat pump; data acquisition board; dew point measurement; laser diode; mirror cooling; narrow band optical detector; optical system; relative humidity sensing structure; smart measuring system; virtual instrumentation; Bifurcation; Diode lasers; Humidity measurement; Mirrors; Narrowband; Optical detectors; Optical pumping; Optical sensors; Temperature measurement; Temperature sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2004. IMTC 04. Proceedings of the 21st IEEE

ISSN

1091-5281

Print_ISBN

0-7803-8248-X

Type

conf

DOI

10.1109/IMTC.2004.1351000

Filename

1351000