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Development of a Low-cost Sensor to Optimise the Use of Fertilisers in Irrigation Systems

Authors:
Francisco Javier Diaz
Ali Ahmad
Sandra Viciano-Tudela
Lorena Parra
Sandra Sendra
Jaime Lloret

Keywords: Two-Coil System, copper coil, optical sensor, electromagnetic sensor, agriculture, artificial neural network

Abstract:
Fertilizers are widely used in agriculture to ensure the availability of nutrients for crops. Sensors are being used to determine fertilizers concentration in precision agriculture systems. In this paper, we present a low-cost sensor for determining fertilizer concentration based on optical and electromagnetic sensors. The combination of sensors prevents the overestimation of fertilizers. Four Two-Coil Systems (TCSs) were compared to determine which offered the most suitable data for determining the fertilizer in the water. The number of spires of powered and induced coils of TCSs ranged from 20 to 80 spires. A single configuration using a light source and light receptor is proposed for the optical sensor. Six calibration samples were prepared to calibrate both the TCSs and the optical-based sensor. The calibration samples vary from 0 to 10 mL/L of fertilizer. Results indicate that TCS 2 b is the one that offers the most accurate results among the tested TCSs. The single regression model obtained with data from TCS 2 b was characterized by a correlation coefficient of 0.988. Finally, the data for both sensors are used in an ANN model to predict the fertilizer concentration of samples. The correctly classified cases were 100 %.

Pages: 34 to 39

Copyright: Copyright (c) IARIA, 2023

Publication date: March 13, 2023

Published in: conference

ISSN: 2308-4006

ISBN: 978-1-68558-052-0

Location: Barcelona, Spain

Dates: from March 13, 2023 to March 17, 2023