Revista elektron

40-51

Authors: Hernán Emilio Tacca

A method for high power pulse transformer design is presented based on analytical assumptions that lead to sizing equations allowing one step design which may then be improved by iteration. An example of a transformer design procedure used in a pulse generator for electroporation is included.

58-63

Authors: Martín Alejandro Heredia, Facundo Santiago Larosa, Ramiro Adrián Ghignone, Federico Alejandro Vázquez Saraullo, Hernán Pablo Mendes Gouveia

In embedded systems a wide variety of applications can be solved or approached using different technologies, such as microcontrollers, FPGA, Systems on Chip (SoC), among others. Even though the volume of information and solutions available that focus on low cost based microcontrollers is quite vast, FPGA and SoC do not have as many resources readily available despite being essential for critical applications and also those in which higher speeds for data processing are required. Not only that, but the high cost of development boards, discontinuity between contents taught in higher education and knowledge required in practical fields, and overall lack of learning resources all add difficulty to any professional looking to specialize themselves in this field of knowledge. It is for this reason that this work proposes an Open Platform for Digital Design Learning on FPGA-based Systems, which looks to facilitate the learning process for any student or professional that wants to get started in this field. For this purpose this work proposes the following: a low-cost development board alongside a set of learning tools and examples which can fit both self-taught students and lecture-based learning environments, and the creation of a national collaboration network to give support to students and teachers who want to join and participate in the project.

69-73

Authors: Roberto M. Insabella, Martín Germán González, Ligia Ciocci Brazzano, David Barbieri

In this work we present the study, development and characterization of a cylindrical focused ultrasonic sensor based on a piezoelectric polymeric material. For the design and implementation of the transducer, we carried out simulations using the commercial tool k-Wave and we used a construction method with great repeatability and low cost. For the characterization of the detection system (sensor + amplifier), we made electrical and acoustic measurements that allowed to determine its sensitivity and equivalent pressure noise. The results of this work show that the implemented sensor is suitable for optoacoustic tomography.

81-86

Authors: Tomás Medina, Lucas Leiva, Martín Vázquez

The use of image processing systems is becoming frequent and is appropriate in edge computing. However, the demands on power consumption and high performance prevent the use of standard processing platforms. Thus, FPGAs are a good option for the development of computer vision systems because they are capable of exploiting parallelism. On the other hand, the design flow of current FPGA synthesis tools supports high-level languages as input descriptions, in contrast to hardware description languages. High-level synthesis (HLS) automates the design process by transforming an algorithmic description into digital hardware meeting design limitations. However, image processing experts may find challenging the hardware integration with the rest of the system components, e.g. capture and display interfaces. This work presents a basic design for the construction of image processing applications based on Zynq and a guide for its use, which solves this problem, allowing the agile generation of embedded image processing solutions. Additionally, a methodology is provided, which facilitates the efficient development of image processing embedded solutions in an agile way.

93-99

Authors: Natalia Iglesias, Pilar Bulacio, Elizabeth Tapia

A communication architecture is presented to enable cloud services around agricultural machinery in rural areas with limited connectivity infrastructure. This architecture is made up of three modules named: on-board unit, gateway and cloud service. Which together allow extending the scope of communication coverage, enabling the exchange of data from agricultural machinery to the cloud. The architecture is developed using low-cost hardware and open-source libraries that allow its rapid implementation. The results obtained, in terms of communication latency, indicate that the solution is suitable for monitoring applications in agricultural machinery using ISOBUS.

107-113

Authors: Juan Pablo Valeo, Sebastian Gregoracci, Leticia María Seijas, Juan Alberto Etcheverry

There is a technological gap between Argentina and other countries. This work presents the Automated LPR Parking System for Argentinian Plates SAE (in Spanish, Sistema Automatizado de Estacionamiento) designed and developed in its prototype version for a private company, to control and manage the entry, stay and exit of vehicles in parking lots. The system is composed by two main modules: the automatic license plate recognition system and the Principal System Board. This board allows the connection of the central unit with peripherals such as magnetic field sensors, access barriers and infrared barriers. In addition, the system manages a database that stores the necessary information for the parking management. Registered users that pay monthly and ocasinal users are considered. Furthermore, the system implements a mechanism for vehicle size detection to determine the value of the parking fees. SAE handles both hardware and system failures and exceptional situations. In addition, the entry and exit of vehicles are handled simultaneously.

1-7

Authors: Juan Carlos Agotegaray, Andrea Pinzón, Emanuel Lera

This paper presents the development of an automated electric generators test bench for low power wind energy in urban applications. The bench allows testing electric generator under similar operating conditions to real, electric generator coupled to a wind turbine in urban environments, which allows to determine specific parameters: electric current, voltage, power.

14-20

Authors: Rosa Marina Corti, Javier Belmonte, Néstor Marcón, Marcelo Pistarelli, Roberto Martínez, Juan Pablo Vecchio

Traditional wireless sensor networks work with scalar data like temperature o humidity because they have strong restrictions on bandwidth and energy consumption. Nevertheless, in recent years, technological advances have permitted a significant growth in the use of these networks for processing and transmitting complex signals like audio, video or vibrations. This work reports the development of an adaptable platform for sensor nodes, which are able to measure, process, store and wirelessly transmit diverse physical variables. The design of these nodes allows the adaptation of them for the use in applications that require to measure and process signals of varied complexity. In addition, the nodes permit the wireless transmission of the information obtained from the local processing of the signals mentioned above. Finally, the adaptation of the platform to measure vibration in road bridges is described as a case study.

27-34

Authors: Federico Luna, Silvina Boggi, Walter Gustavo Fano

Metamaterials in microwave frequency bands have been widely explored in the development and design of antenna structures and arrays. In this paper, the so-called Yang cell have been studied. When these cells are periodically arranged on a plane, the resulting metamaterial structure shows lower band-gap frequencies than structures composed of other unit cells of the same size. The electric and magnetic fields in the first two modes of electromagnetic propagation in the unit cell have been studied. Four equivalent circuit models of the unit cell have been developed in order to easily and quickly obtain the frequency response of the metamaterial structure. These models are explained in this paper, and were validated using full-wave computational electromagnetic methods.