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Keywords = fiber optic thermo-hygrometer

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16 pages, 3746 KiB  
Article
Fiber Optic Thermo-Hygrometers for Soil Moisture Monitoring
by Marco Leone, Sofia Principe, Marco Consales, Roberto Parente, Armando Laudati, Stefano Caliro, Antonello Cutolo and Andrea Cusano
Sensors 2017, 17(6), 1451; https://doi.org/10.3390/s17061451 - 20 Jun 2017
Cited by 30 | Viewed by 10312
Abstract
This work deals with the fabrication, prototyping, and experimental validation of a fiber optic thermo-hygrometer-based soil moisture sensor, useful for rainfall-induced landslide prevention applications. In particular, we recently proposed a new generation of fiber Bragg grating (FBGs)-based soil moisture sensors for irrigation purposes. [...] Read more.
This work deals with the fabrication, prototyping, and experimental validation of a fiber optic thermo-hygrometer-based soil moisture sensor, useful for rainfall-induced landslide prevention applications. In particular, we recently proposed a new generation of fiber Bragg grating (FBGs)-based soil moisture sensors for irrigation purposes. This device was realized by integrating, inside a customized aluminum protection package, a FBG thermo-hygrometer with a polymer micro-porous membrane. Here, we first verify the limitations, in terms of the volumetric water content (VWC) measuring range, of this first version of the soil moisture sensor for its exploitation in landslide prevention applications. Successively, we present the development, prototyping, and experimental validation of a novel, optimized version of a soil VWC sensor, still based on a FBG thermo-hygrometer, but able to reliably monitor, continuously and in real-time, VWC values up to 37% when buried in the soil. Full article
(This article belongs to the Special Issue Humidity Sensors)
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