Dew Point and Relative-Humidity Smart Measuring System
- 20 November 2006
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Instrumentation and Measurement
- Vol. 55 (6), 2259-2264
- https://doi.org/10.1109/tim.2006.884132
Abstract
In this paper, a new design and implementation of an air dew-point smart measuring system are presented. The system also implements a relative-humidity sensing structure, based on dew point (DP) and ambient-temperature measuring channels acquired data, and its design suits particularly laboratory applications. The DP is detected on the surface of a chilled mirror using an optical system. The main elements of the measuring system are a bifurcated-fiber bundle, a laser diode, and a narrowband optical detector. Mirror cooling is made using a current-mode-powered Peltier heat pump. The current control is performed using a digital controller implemented using a data-acquisition board programmed with LabVIEW softwareKeywords
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