Browsing by Author "Guevara Baculima, Remigio Clemente"

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Diseño e implementación de un digitalizador sísmico de 4 canales con acceso IP
(2015) Chaca Benavides, Kevin Santiago; Torres Espinoza, Felipe Andrés; Guevara Baculima, Remigio Clemente
This document describes the theoretical basis and detailsthe design procedure for implementing a seismic digitizer with 3+1 channels. The equipment is able to connect to the Internet using TCP/IP communication through an RJ-45 connector. The Internet connection allows to sharing the resulting seismic acquired data with a resolution of 24 bits from a geophone or anotherseismic sensor, and to inform userabout operating conditions of the equipment. The digitizer has atouch screen programmed to work asinterfacefor user interaction. In the menu that the screen displays is possibleto choose the sampling frequency among ten different ranging from 1 Hz to 2 kHz. It also allows to choice the method, simple threshold level or STA / LTA, and desired trigger level for automatic detection of events of interest. The display also shows a monitoring of environmental conditions at the place of operation. This thesis also explains the development of a Web application that serves as a remote interface between the digitizer and the user, by which can monitor data acquired in the three channels that collect data from each axial axis and a fourth auxiliary channel; also environmental conditions at the site of operation and GPS information. Through the website the user can download the processed and stored information on MINISEED format, standard format that facilitates the worldwide distribution of seismic data, either in long time series, only the detected seismic events or last second of acquired data. The digitizer is implemented in the Raspberry Pi platform taking advantage of running on a Linux operating system. A microcontroller and integrated circuits of analog-digital conversion madeby the same manufacturer are also used. As a result, a fully functional product is obtained with similar capabilities to a commercial digitizer as distributed by Kinemetrics Basalt; able to connect to the Internet to share information of seismic activity and seismic events recognized at the sensor site; with remote access for monitoring by the user, lower price and acceptableenergy consumption.
Diseño e implementación de un dispositivo para la adquisición de datos meteorológicos y conectividad IP que se integre con la red de datos de Senagua en la cuenca del río Santa Bárbara
(2016) Mejía Garcés, Rubén Danilo; Guevara Baculima, Remigio Clemente
In the Santa Barbara river basin, SENAGUA has in place a set of automatic weather stations for the climate study, which largely have a telemetry system. These are imported equipments, so installation is expensive, since the need of updates and to search the compatibility of sensors with the data acquisition system. For this reason, the aim of this project is to design and implement a system of automatic meteorological data acquisition, based on international standards such as WMO, ASTM and others, which operates similar to current operating stations. For the development of the prototype system, it has been used reverse engineering, instrumentation of the sensors and tropicalisation criteria for exposure to adverse environments, using three different platforms: PIC microcontroller, Arduino and Raspberry PI. The different architectures already submitted have been chosen according to three parameters of analysis for embedded systems. First, the cost analysis allows you to compare the costs that would be made by placing a Campbell Scientific weather station, currently operating in network SENAGUA with respect to each of the platforms on which the equipment has developed. Secondly, energy consumption analysis determines the number of solar panels required to power the system. In third place, the computational complexity establishes the difficulty (and therefore the manhours quantity) to implement algorithms required of each platform used. As a result the comparison of three different architectures is obtained, establishing a weather station with lower cost, lower energy consumption and lower computational complexity. The PIC microcontroller platform is the one that presents better performance based on the analysis parameters.
Diseño e implementación de un sistema de monitoreo de la condición de alimentación de las estaciones de la red sísmica del Austro
(2016) Toledo Ortiz, Diego Armando; Placencia León, José Sebastián; Guevara Baculima, Remigio Clemente
In thisdocument, a BatteryChargeControllerisdesigned and performed, based in theintegratedcircuit BQ24650, byNational Instruments, to improvethesupplysystem of the "Red Sísmica del Austro" seismicstations. Additionally, a monitoringsystem of batteryand solar panel voltagelevelsisperformed. Thisinformationistransmittedthroughanexistinganalog radio link in the RSA usingthebandwidthnotoccupied of thetransmissionanalogsystem of seismicinformation, withoutmodify, perturboraddnoise to thesystem. Later, thisinformationisvisualized and stored in a database in the RSA offices.
Diseño e implementación de un sistema para la adquisición, análisis y almacenamiento de información eléctrica en cargas residenciales y compensación automática del factor de potencia
(2015) Alonso Aguilar, Francisco Javier; Pesántez Palacios, Aurelio Antonio; Guevara Baculima, Remigio Clemente
A prototype based on dsPIC digital signal controllers has been designed and implemented in order to log,in function of time, the electrical data: RMS voltage, RMS current, power factor, and total harmonic distortion of voltage and current, of a residential electrical load. The electrical data are saved in a flash type microSD memory card with 2GB of capacity that allows a continuous log of the electrical parameters for a maximum period of six months. The data saving format on the microSD memory card is a text type format (files .txt) in order to allow a data analysis in any computer program that supports this format. To handle the data in an easier way, an additional data file is generated every new day (past 00H00) in the data log process. A control circuit for a capacitor bank has also been designed and implemented based on the real time measurements of the power factor in order to maintain this power factor in an optimum level. Finally, two printed circuit boards have been designed namely: the main board circuit which is the responsible of acquiring and saving the electrical data, and the drive circuit board for the capacitor bank which is the responsible of connecting or disconnecting every capacitor.
Diseño e implementación de un sistema por telemetría medición de la resistividad del suelo
(2016) Palacios Serrano, Iván Santiago; Guevara Baculima, Remigio Clemente
Apparent ground resistivity is useful to know the geophysical characteristics of the ground for grounding systems and even for mineral exploration. Geoelectric survey methods allow to obtain the value of ground resistivity at different points of the field by injecting electric current on the ground using electrodes. The procedure to obtain different resistivity measurements at various points and continuously is a complicated and time consuming process. For these reasons, the objective of this project is to design and implement a telemetric system for ground resistivity measurement, which performs automatic switching of electrodes for sensing at different points and it transmits the data to a fixed station using radio frequency modules. The fixed station has a minicomputer Raspberry PI for receiving data, it displays in real time on an LCD screen and stores data in a text file. Besides, it has an FTP server witch helps to download files. For measurements, two methods of geoelectric prospecting were used: a vertical electrical sounding and constant separation traversing through electrode configurations, Wenner and Schlumberger. The resistivity data obtained with these methods allow to get resistivity variation graphs with respect to depth and distance. In addition, the resistivity data are compared with respect to rainfall occurred in a given time range and an inversely proportional relationship is obtained.
Diseño e implementación de un sistema prototipo de gestión de acceso a las aulas de la facultad de ingeniería mediante llaves electrónicas
(2015) Arias Ordóñez, Christian Xavier; Guevara Baculima, Remigio Clemente
The main objective of this thesis is to design an electronic prototype with wireless Internet access, allowing automatically manage access to classrooms and laboratories of the Engineering Faculty of the University of Cuenca. To achieve this, a device was designed so that together with an RFID reader, magnetic cards can be used like electronic keys. On the other hand an application designed for smartphones with Android operating system, will also function as electronic key, allowing the user to choose the option that prefers to use in case that in the future the prototype is implemented in the faculty. The device management as well as the database of professors, can be managed through a web application designed specifically for this thesis and that resides on a HTTP server. Finally communication between the server and the electronic prototype is possible through a set of functions or API developed in PHP.
Diseño e implementación de una red de sensores inalámbricos para el monitoreo del estado estructural de un puente
(Universidad de Cuenca, 2020-10-15) Molina León, José Luis; Zhagñay Lazo, Darwin Patricio; González Martínez, Santiago Renán; Guevara Baculima, Remigio Clemente; García Alvear, Jaime Enrique
One of the axes of development of a country is its road infrastructure; and within this, bridges represent an important component. The latter are susceptible to damage caused by vehicles, environmental impacts and the aging process; therefore, we must think of a cheap and efficient methodology to identify their status. This project proposes the use of Structural Health Monitoring (SHM) for bridges, this system consists of the implementation of a strategy to identify damage to civil engineering infrastructure through the integration of systems: sensors, data acquisition, data processing and archiving, communication, damage detection and modeling. Therefore it is possible to acquire knowledge about the integrity and load capacity of service structures temporarily or continuously. Following this purpose, the use of microelectromechanical sensors used in Microelectromecha- nical Systems (MEMS) are proposed to deploy micro seismicity monitoring systems; which in practical terms have the same components as SHM system, as well as the use of a Wireless Sensor Networks (WSN) topology in mesh with a central point of acquisition of signals. This is in terms of instrumentation, electronics and communications, with basic treatment, oriented to baseline co- rrections, filtering and calculation of Fast Fourier Transform (FFT). The proposed system consists of a base station that will be responsible for radio frequency communication and synchronization based on a Real Time Clock (RTC), and 10 seismic monitoring nodes based on accelerometers; each with a radio frequency link and a RTC.
Diseño y construcción de un sistema de radiocomunicación entre una computadora y un sistema microcontrolado
(1998) Maldonado López, José Eduardo; Guevara Baculima, Remigio Clemente; Doutreloigne, Jan
Implementación de un calibrador para estaciones sísmicas analógicas y digitales
(2011) Loja Barbecho, Manuel Edgar; Matute Matute, Geovanny Armando; Andrade Rodas, Juan; Guevara Baculima, Remigio Clemente
Implementación de un instrumento para prospección geoeléctrica mediante el método wenner-offset
(2011) Arpi Déleg, Fausto Rubén; Marca Chuva, Juan Fernando; Andrade Rodas, Juan; Guevara Baculima, Remigio Clemente
Implementación de un sistema domótico a nivel de manzana
(2012) Soliz Sinchi, Carlos Xavier; Reino Asmal, Bernardo Esteban; Andrade Rodas, Juan; Guevara Baculima, Remigio Clemente
IoT-based microseismic monitoring system for the evaluation of structural health in smart cities
(ICSC-CITIES, 2018) González Martínez, Santiago Renán; Jiménez Pacheco, Juan Carlos; Guevara Baculima, Remigio Clemente; Palacios Serrano, Iván Santiago; Palacios Serrano, Iván Santiago
This paper presents the design and implementation of a prototype station, which aim to monitor microseismic events. The data collected by the sensors are used for detecting events on a specific zone, as well as for applications of structural health. The prototype was implemented using IoT devices (Internet of Things), such as MEMS accelerometers (Microelectromechanical Systems) and a single board computer with embedded Linux. The station can be accessed remotely by means of a web application based on Node.js, which provides users with real time data. Moreover, the prototype has the capacity of getting information of geolocation as well as platform status (e.g. CPU load, temperature and energy consumption). The main advantage of this proposal consists in the design of a solution based on open hardware architecture, open source, portability and low cost. Regarding the prototype evaluation, results show an appropriate operation, which represents the contribution of this work to the design of monitoring applications in the context of smart cities.
IoT-based sensor nodes for structural health monitoring of bridges
(Springer, Cham, 2020) Molina León, José Luis; Zhagñay Lazo, Darwin Patricio; Muñoz Calle, Milton Rodrigo; Guevara Baculima, Remigio Clemente; González Martínez, Santiago Renán; García Alvear, Jaime Enrique; Molina León, José Luis
The road infrastructure represents a strategic area for the planifica-tion and development of urban and rural environments. In this context, essential facilities such as bridges are subject to damages mainly due to the daily load that represents the vehicular traffic, the environmental conditions and also due to the natural degradation of the structural elements. Therefore, it is fundamen-tal performs a continuous evaluation about the state of an infrastructure. Fol-lowing, this purpose, this paper presents an architecture for the Structural Health Monitoring (SHM) focused on bridges. The proposal solution involves the application of emerging technologies such as MEMS accelerometers, IoT devices and the deployment of a Wireless Sensor Network topology. Particular-ly, the architecture implemented consists of a set of ten sensor nodes which are management and synchronized by means of a central station. Furthermore, an additional node with capacity of capture and video recording was implemented Therefore, this last node provides to the system with a visual option for identi-fying the connection between the accelerations values and the vehicular traffic. In order to evaluate the system, the architecture was deployed along a bridge characterized by a heavy traffic load. Results on the scenario reveals the system allows for determining the main parameters related to state of the structure (i.e., acceleration values, load distribution and the fundamental frequencies of vibra-tion). Consequently, the proposal architecture contributes significantly in the development of solutions focused in the analysis and early detection of damages on essentials structures or facilities.
Performance analysis of a battery charger with BQ24650
(INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS INC., 2016-11-09) Ortiz, D.A.T; Gonzalez Morales, Luis Gerardo; Guevara Baculima, Remigio Clemente
This paper analyzes the smart charger performance for solar photovoltaic energy applications on isolated generating systems with a synchronous buck converter topology using a BQ24650 charger controller from Texas Instruments. The solar battery charger includes different operating modes, which may be voltage or constant current, both help to increase the battery life, also uses a maximum power tracking algorithm with the voltage tracking method, thus, optimizing the energy captured by the solar panel. This analysis shows in detail a theoretical study of the main conduction and switching losses. The battery charger works up to 50 watts at rated power, its performance is greater than 94%. The main losses are the transistor conduction losses, which represent 42% of the total losses. The experimental results are compared with the theoretical analysis, obtaining similar results which support the study.
Prototipo de un dispositivo de adquisición, almacenamiento y transmisión de datos meteorológicos usando los transductores de la estación DAVIS 6162 Wireless Vantage Pro2 Plu
(2017) Gutama Morocho, Marco Paúl; Vázquez Patiño, Joel José; Guevara Baculima, Remigio Clemente; Astudillo Salinas, Darwin Fabián
Studying climate and weather is important for science and planification, therefore, reliable meteorological data is required. Data should be collected in places of interest often difficult to access and dispersed in a wide geographical area. Meteorological stations are used to collect data, but they often lack long range transmition systems, therefore, staff goes to the stations to download the data. This implies spending resources in an activity that can be done automatically. These facts show the need for devices able to reduce the collection cost, to avoid the data lost and to increasy the reliability of the observations. In this work, a prototype device is designed and implemented to adquire and transmit automaticaly the observations of the stations. The prototype uses the transducers of a Davis 6162 Wireless Vantage Pro2 Plus station. A microcontroller with a Real Time Operative System was used to manage the adquisition, storage and transmission of the data. Data is saved in a SD memory and transmitted by an XBee module. Time and date references are provided by a Real Time Clock sincronized to a GPS. Also, the prototype allows to configure sampling and transmition periods and to test the correct performance. The carried out tests showed that the prototype adquires, stores and transmits the data correctly.
Redes inalámbricas ad hoc aplicadas a la monitorización de salud estructural en edificios
(Íñigo Cuiñas Gómez, 2021) Guevara Baculima, Remigio Clemente; Placencia León, José Sebastián; Samaniego Galindo, Víctor Hugo; González Martínez, Santiago Renán; Palacios Serrano, Iván Santiago; Palacios Serrano, Iván Santiago
This paper presents an architecture based on wireless ad hoc networks for the structural health monitoring of buildings. The solution consists of a set of ten sensor nodes (accelerograph stations) as well as a main node or gateway. The communication among the devices was configured through a multi-hop topology. Furthermore, the gateway node incorporates an automatic event detection system where the sensor nodes upload the information of the seismic events to the cloud (Google Drive). This proposal contributes in the design and implementation of resilient communications systems on real scenarios. Regarding the network performance, several experiments were carried out in order to evaluate the throughput, RTT, and the time to transmit the data of events. Finally, results of a seismic event detected are presented which evidence the proper operation of the architecture proposed.
Reliable data acquisition system for a low-cost accelerograph applied to structural health monitoring
(2021) Muñoz Calle, Milton Rodrigo; Guevara Baculima, Remigio Clemente; González Martínez, Santiago Renán; Jiménez Pacheco, Juan Carlos
This paper presents and evaluates a continuous recording system designed for a low-cost seismic station. The architecture has three main blocks. An accelerometer sensor based on MEMS technology (Microelectromechanical Systems), an SBC platform (Single Board Computer) with embedded Linux and a microcontroller device. In particular, the microcontroller represents the central component which operates as an intermediate agent to manage the communication between the accelerometer and the SBC block. This strategy allows the system for data acquisition in real time. On the other hand, the SBC platform is used for storing and processing data as well as in order to configure the remote communication with the station. This proposal is intended as a robust solution for structural health monitoring (i.e. in order to characterize the response of an infrastructure before, during and after a seismic event). The paper details the communication scheme between the system components, which has been minutely designed to ensure the samples are collected without information loss. Furthermore, for the experimental evaluation the station was located in the facilities on a relevant infrastructure, specifically a hydroelectric dam. The system operation was compared and verified with respect to a certified accelerograph station. Results prove that the continuous recording system operates successfully and allows for detecting seismic events according to requirements of structural health applications (i.e. detects events with a frequency of vibration less than 100 Hz). Specifically, through the system implemented it was possible to characterize the effect of a seismic event of 4 MD reported by the regional seismology network and with epicenter located about 30 Km of the hydroelectric dam. Particularly, the vibration frequencies detected on the infrastructure are in the range of 13 Hz and 29 Hz. Regarding the station performance, results from experiments reveals an average CPU load of 51%, consequently the processes configured on the SBC platform do not involve an overload. Finally, the average energy consumption of the station is close to 2.4 W, therefore autonomy provided by the backup system is aroud of 10 hours.
Seismic noise analysis with low-cost variable gain recorder
(2021) Placencia Leon, Jose Sebastian
This paper presents the design and implementation of a seismic noise analysis recorder. Specifically, the system has three main blocks. A configurable gain amplifier, a microcontroller for data acquisition and storage, and finally, both a GPS module and a real-time clock in order to ensure the time synchronization. With regard to the device management, a mobile application was implemented which provides users with tools to analyze data in real time as well to configure operational parameters (i.e., the sampling frequency, the gain of the amplifier and the recording start time). Regarding the architecture evaluation a set of experiments were designed in order to determine the intrinsic noise of the equipment and for verifying the proper operation on the continuous recording system. Finally, results were thoroughly analyzed in both temporal and the frequency domain with respect to data captured with a certified commercial equipment. The comparison carried out reveals a percentage error with a maximum of 7.68% and 3.40% for the time and frequency analysis, respectively. Consequently, the proposed system represents a reliable solution and low-cost alternative which contributes for the acquisition and analysis of seismic data