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Sobre
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Sobre

Doutorado pela Faculdade de Engenharia da Universidade do Porto em Fevereiro de 2004, após apresentação e discussão do trabalho da tese “Teste Dinâmico de Conversores Analógico/Digitais – Novos Métodos de Cálculo de Parâmetros de Caracterização Funcional”.

Professor Auxiliar do Departamento de Engenharia Eletrotécnica e de Computadores da Faculdade de Engenharia da Universidade do Porto (DEEC-FEUP) onde leciona unidades curriculares nas áreas da Eletrónica e Microprocessadores.

Investigador integrado do INESC TEC sendo Coordenador no CRIIS (Centro de Robótica Industrial e Sistema Inteligentes) onde participa em vários projetos científicos.

As suas competências e interesses incluem a Robótica industrial, Sistemas de automação e controlo, Redes industriais, Sistemas Embebidos, Industry 4.0 e Internet of Things.

Tópicos
de interesse
Detalhes

Detalhes

010
Publicações

2021

Pneuma: entrepreneurial science in the fight against the COVID-19 pandemic - a tale of industrialisation and international cooperation

Autores
Mendonça, JM; Cruz, N; Vasconcelos, D; Sá-Couto, C; Moreira, AP; Costa, P; Mendonça, H; Pereira, A; Naimi, Z; Miranda, V;

Publicação
Journal of Innovation Management

Abstract
When the COVID-19 pandemic hits Portugal in early March 2020, medical doctors, engineers and researchers, with the encouragement of the Northern Region Health Administration, teamed up to develop and build, locally and in a short time, a ventilator that might eventually be used in extreme emergency situations in the hospitals of northern Portugal. This letter tells you the story of Pneuma, a low-cost emergency ventilator designed and built under harsh isolation constraints, that gave birth to derivative designs in Brazil and Morocco, has been industrialized with 200 units being produced and is now looking forward to the certification as a medical device that will possibly support a go-to-market launch. Open intellectual property (IP), multidisciplinarity teamwork, fast prototyping and product engineering have shortened to a few months an otherwise quite longer idea-to-product route, clearly demonstrating that when scientific and engineering knowledge hold hands great challenges can be successfully faced.

2019

Parallelization of a Vine Trunk Detection Algorithm for a Real Time Robot Localization System

Autores
Azevedo, F; Shinde, P; Santos, L; Mendes, J; Santos, FN; Mendonca, H;

Publicação
19th IEEE International Conference on Autonomous Robot Systems and Competitions, ICARSC 2019

Abstract
Developing ground robots for crop monitoring and harvesting in steep slope vineyards is a complex challenge due to two main reasons: harsh condition of the terrain and unstable localization accuracy obtained with Global Navigation Satellite System (GNSS). In this context, a reliable localization system requires an accurate detector for high density of natural/artificial features. In previous works, we presented a novel visual detector for Vineyards Trunks and Masts (ViTruDe) with high levels of detection accuracy. However, its implementation on the most common processing units - central processing units (CPU), using a standard programming language (C/C++), is unable to reach the processing efficiency requirements for real time operation. In this work, we explored parallelization capabilities of processing units, such as graphics processing units (GPU), in order to accelerate the processing time of ViTruDe. This work gives a general perspective on how to parallelize a generic problem in a GPU based solution, while exploring its efficiency when applied to the problem at hands. The ViTruDe detector for GPU was developed considering the constraints of a cost-effective robot to carry-out crop monitoring tasks in steep slope vineyard environments. We compared the proposed ViTruDe implementation on GPU using Compute Unified Compute Unified Device Architecture(CUDA) and CPU, and the achieved solution is over eighty times faster than its CPU counterpart. The training and test data are made public for future research work. This approach is a contribution for an accurate and reliable localization system that is GNSS-free. © 2019 IEEE.

2019

System-level study on impulse-radio integration-and-fire (IRIF) transceiver

Autores
Kianpour, I; Hussain, B; Mendonca, HS; Tavares, VG;

Publicação
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS

Abstract
Integrate-and-fire (IFN) model of a biological neuron is an amplitude-to-time conversion technique that encodes information in the time-spacing between action potentials (spikes). In principle, this encoding scheme can be used to modulate signals in an impulse radio ultra wide-band (IR-UWB) transmitter, making it suitable for low-power applications, such as in wireless sensor networks (WSN) and biomedical monitoring. This paper then proposes an architecture based on IFN encoding method applied to a UWB transceiver scenario, referred to herein as impulse-radio integrate-and-fire (IRIF) transceiver, followed by a system-level study to attest its effectiveness. The transmitter is composed of an integrate-and-fire modulator, a digital controller and memory block, followed by a UWB pulse generator and filter. At the receiver side, a low-noise amplifier, a squarer, a low-pass filter and a comparator form an energy-detection receiver. A processor reconstructs the original signal at the receiver, and the quality of the synthesized signal is then verified in terms of effective number of bits (ENOB). Finally, a link budget is performed. (C) 2019 Published by Elsevier GmbH.

2019

Multi-Protocol LoRaWAN/Wi-Fi Sensor Node Performance Assessment for Industry 4.0 Energy Monitoring

Autores
Ferreira, P; Miranda, RN; Cruz, PM; Mendonca, HS;

Publicação
Proceedings of the 2019 9th IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications, APWC 2019

Abstract
This paper describes the implementation of an end-to-end Internet of Things (IoT) solution, focusing specifically in the multi-protocol sensor node with LoRaWAN and Wi-Fi connectivity options (Pycom's FiPy). A performance assessment will be presented, addressing a comparison between the different protocols (LoRaWAN vs. Wi-Fi) in terms radio coverage, timing issues, among others. Further, it will be investigated the integration onto the sensor node of sensor/actuator circuit blocks for energy metering, supported on Microchip's ATM90E26 single-phase meter. This will provide a practical use case in the field of Industry 4.0, leading to preliminary insights for power quality monitoring. © 2019 IEEE.

2015

A Low-Power Multi-Tanh OTA with Very Low Harmonic Distortion

Autores
Kianpour, I; Hussain, B; Tavares, VG; Mendonca, HS;

Publicação
2015 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS)

Abstract
This paper presents a wide input range, low-power operational transconductance amplifier (OTA) in weak inversion. The OTA is implemented with tanh-triplets differential pairs, degenerated by a composite configuration to augment the input linear range, thus reducing further the harmonic distortion. Using MATLAB, the mismatch factor (A) of a typical multi-tanh triplet has been optimised for minimum harmonic distortion. The OTA is designed in UMC 0.13um CMOS technology with 1.2V supply. Simulations show that the input range can be extended to 300 mV, while keeping the HD3 below -80 dB. The average power consumption is 13nW, with an open loop-gain of 76 dB and a unity gain frequency of 250 Hz. The low harmonic distortion OTA can find potential applications in low-power and long time constant filters.

Teses
supervisionadas

2019

Multi-Protocol Sensor Node for Internet of Things (IoT) Applications

Autor
Pedro Miguel Pinheiro Fonseca Ferreira

Instituição
UP-FEUP

2019

Design of a low power transmitter for UWB applications

Autor
Iman Kianpour

Instituição
UP-FEUP

2019

Sistemas de Tracking e Ground Truth para robôs móveis

Autor
Francisco de Castro e Costa

Instituição
UP-FEUP

2019

Development of a Low Cost Test Bench with Interface for Ethernet BASE-T1 and CAN FD

Autor
Gabriel Pereira Pinheiro

Instituição
UP-FEUP

2018

Detecção Inteligente de Falha de Iluminação Parcial

Autor
Orlanda Alice Moreira Neto Mendes de Sousa

Instituição
UP-FEUP