Artículos Científicos - 2024

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https://hdl.handle.net/20.500.14597/9157

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Examinando Artículos Científicos - 2024 por Autor "Márquez Camarena, Javier Francisco"

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    Ítem
    Characterization of Metallic Gold Nanoparticles in a Colloidal State by Artificial Vision
    (Polskie Towarzystwo Inżynierii Ekologicznej, 2024-01-26) Márquez Camarena, Javier Francisco; Carbajal Morán, Hipólito; Galván Maldonado, Carlos Abel
    Gold nanoparticles in their colloidal state have different colors, and the equipment for their characterization, such as UV-Vis spectrophotometers, scanning electron microscopy (SEM), and transmission electron microscopy (TEM), has high costs. The research aimed to characterize metallic gold nanoparticles by artificial vision based on the color of the samples in the colloidal state. The sensor used for the sampling was a 50 MP triple-lens camera with the optical image stabilization (OIS) of a smartphone. The Vision Acquisition and Vision Assistant blocks in the NI LabVIEW platform were used to implement an artificial vision device. The camera interface was used to identify the color of each of the 10 samples of colloidal gold nanoparticles produced by the YAG laser and chemical reduction in 15 ml of deionized water. The characterization consisted of the determination of the size and concentration of the gold nanoparticles based on their color, which ranged from pink to red wine. As a result, the artificial vision device adequately identified the color of the metallic gold nanoparticles in a colloidal state with a certainty of more than 95%, allowing the nanoparticles to be adequately characterized. Therefore, it is concluded that artificial vision adequately characterized gold nanoparticles' wavelength, absorbance, diameter, and concentration.
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    Ítem
    Tunable PID Controller from the WinCC Unified Interface via OPC UA
    (Engineering and Technology Publishing, 2024-09-01) Carbajal Morán, Hipólito; Galván Maldonado, Carlos Abel; Ramos Lapa, Everth Manuel; Márquez Camarena, Javier Francisco
    Abstract—In this study, it was sought to implement a Proportional-Integral-Derivative (PID) controller in SIMATIC S7-1500 Programmer Logic Controller (PLC) with Open Platform Communications United Architecture (OPC UA) communication and tunable control from WinCC unified, in order to reduce the settling time of the temperature variable in the plant SO 3536-8T. Using the Ziegler-Nichols PID rule, adjustments were made to the Kp,Ti and Td coefficients of the PID controller. Initially set with values of Kp = 1.0, Ti = 20.00 s, Td = 0.1 s, and ess ≤ 2%. Without tuning, a maximum settling time of 193 s was achieved for a setpoint of 50 °C. After tuning from the WinCC unified interface, improved parameters (Kp = 6.05, Ti= 0.75 s, Td = 0.15 s) were obtained for ess ≤ 2%, presenting an underdamped response and a maximum settling time of 54 s. The tests present a reduction of the settling time of the variable higher than 60.25%, evidencing the effectiveness of the tunable PID controller in improving the system performance. Overall, the successful implementation of this tunable PID controller not only optimized the efficiency of the control system, but also provided a considerable reduction in the settling time of the temperature variable in the plant, representing a significant advance for the operation and overall efficiency of the process.