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Optical Engineering

Dual-wavelength moisture meter for clay
Author(s): Michele Norgia; Alessandro Pesatori
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Paper Abstract

An optical sensor for measuring the moisture level of clay has been realized by a couple of telecommunications lasers at 1300 and 1550 nm. The sensor can operate directly during building material production. The measurement principle is based on the measurement of the optical reflection at different wavelengths in the infrared region. Custom low-noise electronics allows rejecting disturbances of ambient light, and a digital processing makes the system independent on the clay distance. By means of a proper calibration, the sensor can monitor the moisture level during brick production, without moving parts or optical filters.

Paper Details

Date Published: 10 October 2012
PDF: 4 pages
Opt. Eng. 51(10) 104402 doi: 10.1117/1.OE.51.10.104402
Published in: Optical Engineering Volume 51, Issue 10
Show Author Affiliations
Michele Norgia, Politecnico di Milano (Italy)
Alessandro Pesatori, Politecnico di Milano (Italy)


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