Sarmiento Ortiz, Fabián
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Preferred name
Sarmiento Ortiz, Fabián
Main Affiliation
Quito
Email
fabiansarmiento@uti.edu.ec
ORCID
Scopus Author ID
57279194800

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Accurate Automation in Nutrient Solution Dosage for Pressurized Irrigation Systems

2025 , Sarmiento Ortiz, Fabián , Topon Visarrea, Blanca , Iza Llumigusin, Christian

pressurized irrigation systems, especially concerning electroconductivity (EC) and pH. In this context, data from field samples of a rose crop located in Tabacundo, Ecuador, and agronomic tables were compared to identify deviations in variables. It was observed that electroconductivity fluctuates irregularly between values of 1.3 mS and 2.7 mS, with the target value being 1.8 mS. In contrast, the pH exhibited values higher than the ideal 5.5. In response to this issue, an automated system with a graphical interface was developed to facilitate control of EC and pH values. This was achieved through PID control and automation using PLC+HMI, flow transmitter, flow sensor, and hydraulic elements comprising the pumping system. As a result, greater control was achieved through PID, reducing pH and EC errors to 3% compared to the desired values. Additionally, irrigation time was reduced by 50%. The implementation of the HMI-PLC interface facilitated agronomists’ human-computer interaction, emphasizing the importance of automatic control in agriculture, showcasing significant improvements in precision, efficiency, and ease of operation. The implemented system stands as an effective solution for optimizing nutrient management in irrigation systems, contributing to the healthy growth of crops, promising to simplify agricultural operations by providing farmers with more precise control and improved supervision in pressurized irrigation systems.

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Optimization of the Solvent Based Paint Manufacturing Process Through Automation and Quality Control to Meet Industry Standards

2025 , David Naranjo-Pullupaxi , Topon Visarrea, Blanca , Iza Llumigusin, Christian , Sarmiento Ortiz, Fabián , Pozo Espin, Israel

The paint manufacturing process requires compliance with the processes of filler preparation, dispersion, grinding, homogenization, packaging, and storage. According to NTE INEN 2094 “Paints - Synthetic alkyd enamels for domestic use” the viscosity of the paint should be between (75–80 KU) during the dispersion process, but in the company of our study 67% of the products did not meet this specification. Therefore, the main objective of this project is to improve the efficiency of the dispersion process through automation and agitation time control. A human-machine interface (HMI) was developed and an S7–1200 PLC and a KTP900 HMI screen were programmed using TIA Portal software. This system allowed precise control of agitation times during paint dispersion. The method focused on ensuring that the viscosity remained within the required limits, avoiding rework and production delays. The implementation of automation in the dispersion process led to a significant reduction of 29.03% of nonconforming product, resulting in a substantial decrease in process time, from 6.502 min to 3.719 min in total for the 18 dispersions evaluated. This improvement is mainly attributed to the decrease in the time required for reprocessing. This contributed to improving the efficiency and quality of the final product, meeting the required standards.

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