Project and Development of Fiber Optic Sensor Prototypes for Soil Nutrient and pH Detection for Precision Agriculture Applications.

• Grant number: 23/06990-4
• Support Opportunities: Research Grants - Innovative Research in Small Business - PIPE
• Start date: November 01, 2024
• End date: April 30, 2026
• Field of knowledge: Engineering - Electrical Engineering - Electrical, Magnetic and Electronic Measurements, Instrumentation
• Principal Investigator: Jonas Fontes Garcia
• Grantee: Jonas Fontes Garcia
• CNAE: Cultivo de plantas de lavoura permanente não especificadas anteriormente ; Atividades de apoio à agricultura
• Associated research grant: 19/22968-3 - Design and development of prototypes of fiber optic sensors for soil nutrients detection and ph for application in precision agriculture, AP.PIPE

Abstract

This project aims to develop prototypes of optical sensors for the detection of soil macronutrients and pH levels, integrated into a GPS system for real-time monitoring and management. The goal is to provide a more affordable and user-friendly solution for farmers and environmental experts, enabling precise soil assessment for decision-making regarding cultivation and resource use.Currently, there are other sensors on the market that perform this type of measurement, but many require advanced theoretical knowledge in physics, chemistry, and biology to be used correctly. However, the project in question was designed to be simple and easy to handle, without the need for prior knowledge. This makes the solution accessible to farmers and other professionals who want to analyze the soil more accurately. In addition, it offers a more affordable and portable alternative for soil analysis, allowing the process to be carried out directly in the cultivation area.The operating principle involves emitting light with a broad spectrum of white light wavelength emission, which is directed towards the soil sample. The light reflected/absorbed by the sample is then captured by an optical sensor and converted into an electrical signal that is processed by a microcontroller.The application developed alongside the project allows the integration of data generated by the optical sensor with the GPS system of the paired mobile device, enabling real-time data collection. This allows the creation of soil nutrient and pH maps, which can be used to guide fertilization and other cultivation treatments based on the specific needs of the cultivation area. The GPS system also allows farmers to monitor changes in soil conditions over time and helps optimize agricultural production.Another advantage of the project is the simplicity in building the sensor prototypes. They can be easily manufactured with low-cost components and assembled in a portable format. The simplicity of construction makes the project scalable and accessible for large-scale implementation. (AU)