Busca avançada
Ano de início
Entree


Automated Low-Cost Soil Moisture Sensors: Trade-Off between Cost and Accuracy

Texto completo
Autor(es):
Schwamback, Dimaghi ; Persson, Magnus ; Berndtsson, Ronny ; Bertotto, Luis Eduardo ; Kobayashi, Alex Naoki Asato ; Wendland, Edson Cezar
Número total de Autores: 6
Tipo de documento: Artigo Científico
Fonte: SENSORS; v. 23, n. 5, p. 18-pg., 2023-03-01.
Resumo

Automated soil moisture systems are commonly used in precision agriculture. Using low-cost sensors, the spatial extension can be maximized, but the accuracy might be reduced. In this paper, we address the trade-off between cost and accuracy comparing low-cost and commercial soil moisture sensors. The analysis is based on the capacitive sensor SKU:SEN0193 tested under lab and field conditions. In addition to individual calibration, two simplified calibration techniques are proposed: universal calibration, based on all 63 sensors, and a single-point calibration using the sensor response in dry soil. During the second stage of testing, the sensors were coupled to a low-cost monitoring station and installed in the field. The sensors were capable of measuring daily and seasonal oscillations in soil moisture resulting from solar radiation and precipitation. The low-cost sensor performance was compared to commercial sensors based on five variables: (1) cost, (2) accuracy, (3) qualified labor demand, (4) sample volume, and (5) life expectancy. Commercial sensors provide single-point information with high reliability but at a high acquisition cost, while low-cost sensors can be acquired in larger numbers at a lower cost, allowing for more detailed spatial and temporal observations, but with medium accuracy. The use of SKU sensors is then indicated for short-term and limited-budget projects in which high accuracy of the collected data is not required. (AU)

Processo FAPESP: 19/24292-7 - Dinâmica da infiltração e escoamento superficial em vertentes com diferentes usos do solo e mudanças climáticas em área de Cerrado
Beneficiário:Dimaghi Schwamback
Modalidade de apoio: Bolsas no Brasil - Doutorado
Processo FAPESP: 15/03806-1 - Disponibilidade hídrica e riscos de contaminação em áreas de afloramento do Sistema Aquífero Guarani
Beneficiário:Edson Cezar Wendland
Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Temático
Processo FAPESP: 21/14016-2 - Modelo Hydrus para a representação teórica do escoamento vertical sob diferentes usos do solo comumente encontrados no bioma Cerrado brasileiro
Beneficiário:Dimaghi Schwamback
Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado