Optimum wavelength selection for a POF-based soil moisture sensor with a gypsum substrate

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F25%3A00386242" target="_blank" >RIV/68407700:21230/25:00386242 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1088/1361-6501/ae1f31" target="_blank" >https://doi.org/10.1088/1361-6501/ae1f31</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1361-6501/ae1f31" target="_blank" >10.1088/1361-6501/ae1f31</a>

Result language
angličtina
Original language name
Optimum wavelength selection for a POF-based soil moisture sensor with a gypsum substrate
Original language description
Measuring soil moisture is important in many fields. Knowing the water content of soil is particularly crucial in agriculture, plant cultivation, gardening, irrigation management, climatology and weather forecasting. However, accurately determining soil moisture levels can be challenging, and several methods are commonly employed. This paper presents a sensor based on the Fresnel total internal reflection method. It uses multimode plastic optical fibre (POF) with a stripped cladding and exposed core, which is sealed within a gypsum substrate. The presence of moisture affects its transmittance. The performance of this detection method also depends on the wavelength of the test light. The paper describes the construction of the sensor. The mechanical, optical, and electronic designs are described in detail. It presents transmittance as a function of moisture and for different wavelengths in the visible and near-infrared spectra for various soil moisture values. The results demonstrate the effectiveness of the proposed sensing method. The sensor has low power consumption and does not interact directly with the soil. This ensures minimal interaction with other sensors and electronics, as well as minimising the influence of soil mineralisation on the measurement results.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20201 - Electrical and electronic engineering

Project
<a href="/en/project/TN02000067" target="_blank" >TN02000067: Future Electronics for Industry 4.0 and Medical 4.0</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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