Dew point and relative humidity smart measuring system
Octavian Adrian Postolache, Pedro Silva Girão, J. M. Dias Pereira, C. Banha, Helena G. Ramos · 2004
In the present article, the design and implementation of a dew point (T/sub 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.