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Dew Point and Relative-Humidity Smart Measuring System

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4 Author(s)

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 software

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Instrumentation and Measurement, IEEE Transactions on  (Volume:55 ,  Issue: 6 )