The objective was to design an articulated arm with control of trajectory and speed by voice commands, to rehabilitate people with motor disabilities of the upper limb. The systemic method was used; voice commands were considered inputs to the system; movements of the arm link joints were considered outputs. From the tests carried out with the design, it was determined that the controller activated by voice commands allows to keep controlled the speeds of the different motors that make up the wrist, elbow and shoulder joints; With respect to the speeds, these are closely correlated, whose coefficients are greater than 0.99, which indicates that the difference between the desired speeds and those obtained have very little difference. In conclusion, an arm with articulations of three degrees of freedom was implemented, commanded by voice using pre-established codes, allowing the trajectori...

Water quality is essential for a healthy life, so it is necessary to look for technologies to measure its parameters in real time and automatically. The purpose of this study was to implement and determine the reliability of an automated system to evaluate the Organoleptic Water Quality intended for human consumption, in the urban distribution network of the district of Daniel Hernandez - Peru, using a Programmable Logic Controller (PLC) and Simulink. The study was carried out from January to March 2024, corresponding to the rainfall season. In the process of the research, a data acquisition and processing algorithm was implemented in a Simatic S7 1500 PLC with analog input module; using the National Sanitation Foundation Water Quality Index (NSF-WQI) methodology. The work focused on five key water parameters: potential hydrogen (pH), electrical conductivity (EC), turbidity, free chlorin...

The research sought to evaluate the normalized difference vegetation index (NDVI) of the study area located in the province of Tayacaja, which includes the districts of Acraquia, Ahuaycha, Pampas and Daniel Hernández, which is part of the central Andes of Peru. The data were collected in low water seasons with a longitudinal cut of 30 years with one sample per year, starting in 1993 until 2022; these samples corresponded to the month of August of each year. The images were extracted from maps from Landsat satellite databases, which were filtered for low cloud cover to avoid interference with the images. Maps from 1993 to 2012 were obtained from Landsat 5 satellite, while from 2013 to 2022 data were obtained from Landsat 8 satellite. The normalized difference vegetation index was determined using Quantum GIS based on the red and near infrared maps; being the minimum NDVI value obtained -...

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 ...

El trabajo tuvo como objetivo determinar los efectos de la configuración del modelo de sistema fotocatalítico solar con nanopartículas de TiO2 y periodo de exposición moderado durante días soleados en la recuperación de aguas grises para el empleo en riego de cultivos. Se empleó un fotorreactor solar programable basado en PLC S7 1500 y sensores de medición en tiempo real. Se empleó el método inductivo para analizar las muestras de aguas grises y el deductivo para determinar la calidad del agua. Se empleó en la investigación el diseño experimental basado en la metodología de superficie de respuesta (MSR) con experimento inicial tipo DCC de 20 observaciones, optimizado por escalamiento ascendente y un experimento final tipo DCC de 13 observaciones, estos experimentos se llevaron a cabo en días soleados del mes de enero a mayo del año 2020 en el departamento de Huancavelica....

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 conc...