Leone Marco, Principe Sofia, Consales Marco, Parente Roberto, Laudati Armando, Caliro Stefano, Cutolo Antonello, Cusano Andrea
Optoelectronic Division, Department of Engineering, University of Sannio, 82100 Benevento, Italy.
Optosmart s.r.l., 80055 Portici (NA), Italy.
Sensors (Basel). 2017 Jun 20;17(6):1451. doi: 10.3390/s17061451.
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.
这项工作涉及一种基于光纤温湿度计的土壤湿度传感器的制造、原型制作和实验验证，该传感器对降雨引发的山体滑坡预防应用很有用。特别是，我们最近提出了新一代用于灌溉目的的基于光纤布拉格光栅（FBG）的土壤湿度传感器。该装置是通过在定制的铝制保护封装内集成一个带有聚合物微孔膜的FBG温湿度计实现的。在此，我们首先验证了这种土壤湿度传感器第一版在体积含水量（VWC）测量范围方面的局限性，以便将其用于山体滑坡预防应用。随后，我们展示了一种新型、优化版土壤VWC传感器的开发、原型制作和实验验证，该传感器仍基于FBG温湿度计，但埋入土壤时能够可靠地连续实时监测高达37%的VWC值。
