Navegando por Assunto "IoT (Internet das coisas)"

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Acesso aberto (Open Access)
Desenvolvimento de softwares e algoritmo baseado em redes neurais artificiais para suporte à gestão da mobilidade urbana em smart campus com característica multimodal
(Universidade Federal do Pará, 2022-07-20) SÁ, Joiner dos Santos; ARAÚJO, Jasmine Priscyla Leite de; http://lattes.cnpq.br/4001747699670004
This work presents the development of two software solutions and an algorithm based on artificial neural networks to support the management of urban mobility in a smart campus. The first software, called Norte Rotas, is a web solution whose objective is to support the planning of pedestrian routes, providing relevant information about the physical conditions of the routes of a smart campus. The second solution is an Android mobile software that aims to manage transport modes present in a smart campus. Tests in simulated and real environments were carried out and the results indicate that the proposed tools are good solutions for the planning and management of modal routes in an intelligent university campus. In addition to the software, a computational intelligence algorithm is proposed to determine the best travel route considering the options on foot, by bus and by boat in an IoT system of a smart campus. Data were collected from UFPA's Circular bus routes, and tests with different parameters of an ANN were performed. The results show that the solution based on ANN is promising to be implanted in urban mobility aid systems in a smart campus.
Acesso aberto (Open Access)
Modelo de propagação usando dois raios com modificação de fase para mobilidade aplicado a receptor LoRa sobre rio.
(Universidade Federal do Pará, 2024-09-19) RIBEIRO, Lucian Morais; BARROS, Fabrício José Brito; http://lattes.cnpq.br/9758585938727609
As predicted by experts, there has been exponential growth in the number of IoT devices used by the general population. Among these devices, one of the most notable groups is the Long Range (LoRa) devices. The most relevant feature of LoRa technology is its low energy consumption, while simultaneously providing a wide coverage area. If applied in the Amazon region – a densely forested, humid area with populations far from urban centers and with very little infrastructure – this technology could offer a new range of services to the region’s inhabitants, including services involving communication on the move. Starting from the principle that the most well-known propagation models are not adjusted to the specificities of the Amazon region, nor do they consider the phase variations caused by receiver movement – which makes radio links difficult to predict – we aim to present solutions to this problem through this work, which presents adjustments to the Two-Ray propagation loss model to accommodate LoRa communications over the Amazon rivers when the receiving devices are in motion. The proposed model is compared to the standard Two-Ray Model, which serves as the baseline, and achieves better results. Additionally, the study evaluates the impact of tides on the propagation loss of LoRa signals in river environments.
Acesso aberto (Open Access)
. Sistema de monitoramento de vazão de água utilizando tecnologia LoRA
(Universidade Federal do Pará, 2024-12-17) CASTRO, Jucicleber Francisco da Silva; BORGES, Gilvan Soares; http://lattes.cnpq.br/7696860178450119; COSTA, João Crisóstomo Weyl Albuquerque; http://lattes.cnpq.br/9622051867672434
The discussion on the rational use of water has gained worldwide momentum in recent years. The United Nations (UN) treats the issue with due priority, including it in its Sustainable Development Goals (SDG 6). Brazil, in turn, is striving to adhere to this context with the implementation of the new regulatory framework for the sanitation sector, enacted in 2020. Despite the well-deserved importance given to sanitation in recent years, there is a need to invest resources in the area in order to achieve the adequate social reach of water for all, where the absence of these policies in isolated and socially excluded regions is latent. Technologically, within this scenario, it is possible to envision the Internet of Things (IoT) as an important differentiator to be used as a social inclusion technology through the application of low power wide area networks (LPWAN), with LoRa technology standing out as one of the most promising for building communication networks aimed at IoT applications. This work aims to meet this demand through a proposal for water flow sensing using LoRa networks, as a subsequent case study in isolated communities in future work. This proposal for a water flow monitoring system is based on an architecture involving the installation of a digital ultrasonic hydrometer at a water collection point for data collection and real-time monitoring. The bench tests involving the installation of the hydrometer were carried out with the initial aim of communicating with the LoRa-ESP32-Wi-Fi v2 module. With the data collected, it was possible to transmit it to a broker server using MQTT protocol that is consumer for a dashboard that was build using a Node-RED for water consumption monitoring analysis, making it easier to identify leaks and develop strategies to reduce losses when implementing the prototype.