Pedro Ribeiro

INESC Microsistemas e Nanotecnologias | INESC-MN

The detection of small forces is of great interest in any robotic application that involves interaction with the environment (e.g. objects manipulation, physical human-robot interaction, minimally invasive surgery), since it allows the robot to detect the contacts early on and to act accordingly. In this work, we present a sensor design inspired by...

Tactile sensing is crucial for robots to manipulate objects successfully. However, integrating tactile sensors into robotic hands is still challenging, mainly due to the need to cover small multi-curved surfaces with several components that must be miniaturized. In this paper, we report the design of a novel magnetic-based tactile sensor to be inte...

Automated technologies for quality inspection of fruits have attracted great interest in the food industry. The development of nondestructive mechanisms to assess the quality of individual fruit prior to sale may lead to an increase in overall product quality, value, and consequently, producer competitiveness. However, the existing methods have lim...

Automated technologies for quality inspection of fruits have attracted great interest in the food industry. The development of nondestructive mechanisms to assess the quality of individual fruit prior to sale may lead to an increase in overall product quality, value, and consequently, producer competitiveness. However, the existing methods have lim...

Back and spine-related issues are frequent maladies that most people have or will experience during their lifetime. A common and sensible observation that can be made is regarding the posture of an individual. We present a new approach that combines accelerometer, gyroscope, and magnetometer sensor data in combination with permanent magnets assembl...

We present the fabrication process and characterization of a tunnel magnetoresistance sensor based monolithic device assembled in a Wheatstone bridge architecture, capable of measuring magnetic field in both planar sensitive directions simultaneously. This process is simplified in comparison with other fabrication strategies, as it does not require...

[AWARD] 1st Place - 2019 IEEE International Sensors and Measurements Student Contest The Spine Cop is a wearable posture monitoring system based on the SensorTile compact sensor, located between the shoulder blades, combined with permanent magnets, that will provide the ability of distinguishing if its user maintains a correct posture independentl...

In this paper, we present a strategy employing four coplanar magnetic sensors with a single sensitive direction to detect the position of a magnet in a 2-D plane parallel and above the sensors' plane. By positioning the magnet in such a way that its magnetic moment vector lies on the direction orthogonal to the sensing elements' sensitive direction...

The detection of force with higher resolution than observed in humans (~1 mN) is of great interest for emerging technologies, especially surgical robots, since this level of resolution could allow these devices to operate in extremely sensitive environments without harming these. In this work, we present a force sensor fabricated with a miniaturize...

We report on the first running of the Markov Matrices course (within the MOOC Técnico platform) making emphasis on the use of exercises with random parameters for both formative assessment and graded weekly tests.

We describe an assessment strategy that helped to ensure high participation levels together with a relevant certification in a MOOC Mathematics course. We report on the first running of the Markov Matrices course making emphasis on the preparation of exercises with random parameters for graded weekly tests. A brief description is given of forum int...

Neste trabalho implementa-se um método de medição, em tempo real, da posição de uma esfera metálica suspensa com dois graus de liberdade no interior de uma caixa de paredes condutoras. A geometria da montagem proporciona acoplamentos capacitivos variáveis, que dependem da distância da esfera a cada um dos planos. Com o circuito dimensionado para me...