Visual Sensors
Mostrando 1-12 de 25 artigos, teses e dissertações.
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1. Hydrothermal Synthesis to Water-stable Luminescent Carbon Dots from Acerola Fruit for Photoluminescent Composites Preparation and its Application as Sensors
Carbon dots (C-dots) possess the attractive properties of high stability, low toxicity, good water solubility, simple synthetic routes as well as size and excitation-dependent photoluminescence (PL).The aim of this work was to synthesize photoluminescent C-dots by hydrothermal method using acerola fruit (Malpighiaemarginata) as a row material, since this fru
Mat. Res.. Publicado em: 06/06/2019
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2. MONITORING FLEXIBLE RISERS WITH OPTICAL FIBER SENSORS / MONITORAMENTO DE RISERS FLEXÍVEIS COM SENSORES A FIBRA ÓPTICA
The interest in structural health monitoring of flexible risers has grown significantly in recent years. For ducts that are already reaching their design life, monitoring systems can provide early warnings of potential failures and also assist the operator in scheduling downtime. Different techniques are being tested by operators of flexible pipes such as au
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/04/2011
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3. On-line SLAM using clustered landmarks with omnidirectional vision
The problem of SLAM (simultaneous localization and mapping) is a fundamental problem in autonomous robotics. It arises when a robot must create a map of the regions it has navigated while localizing itself on it, using results from one step to increase precision in another by eliminating errors inherent to the sensors. One common solution consists of establi
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-12
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4. A conceptual image-based data glove for computer-human interaction
Data gloves are devices equipped with sensors that capture the movements of the hand of the user in order to select or manipulate objects in a virtual world. Data gloves were introduced three decades ago and since then have been used in many 3D interaction techniques. However, good data gloves are too expensive and only a few of them can perceive the full se
Publicado em: 2010
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5. Arquitetura como interface para a informação: sobre a espacialização das tecnologias da informação rumo a práticas colaborativas
This study examines an intersection between the spatialization of information and CSCW - Computer Supported Collaborative Work. More specifically it is argued the possibility of influence of the spatial distribution of ICT (information and communication technologies) on the interactions between members of two remotely connected laboratories. Spatialization (
Publicado em: 2010
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6. COMPARAÇÃO ENTRE CONTROLES LOOK-AND-MOVE E SERVO-VISUAL UTILIZANDO TRANSFORMADAS SIFT EM MANIPULADORES DO TIPO EYE-IN-HAND / COMPARISON BETWEEN LOOK-AND-MOVE AND VISUAL SERVO CONTROL USING SIFT TRANSFORMS IN EYE-IN-HAND MANIPULATOR SYSTEMS
Computer vision can be used to calibrate and self-localize robots. There are many applications in self-localization and control applied to industrial manipulators and mobile robots. In particular, visual control can be useful in submarine interventions, where a robotic manipulator is mounted on a Remote Operated Vehicle (ROV) to execute tasks at high depths,
Publicado em: 2009
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7. Os efeitos do nível de estabilização do desempenho na adaptação a perturbaçoes perceptivas imprevisíveis
The purpose this study was to investigate the effects of the levels of performance stabilization in the adaptation to unpredictable perceptive perturbations. Fifty one volunteers were randomly distributed in three groups: Control group (GC), Stabilization Group (GE) and Super Stabilization Group (GS). The experiment was conducted in two phases, named pre-exp
Publicado em: 2009
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8. Optical sensors and instrumentations for determination of contaminants in water / Sensores opticos e instrumentação para determinação de contaminantes em aguas
This work describes the development of optical sensors for determination of benzene, toluene, ethylbenzene and xylenes (BTEX) and metal ions in water. For the determination of BTEX, monoliths of polydimethylsiloxane (PDMS) were inserted into a bottle filled with aqueous solutions of BTEX compounds for a pre-defined period of time. Afterwards the sensing phas
Publicado em: 2009
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9. Análise por vetor de mudanças para a avaliação multitemporal e multissensores da cobertura das terras do cerrado / Change vector analysis for multitemporal and multisensor assessment of Cerrado land cover
The main objective was to study the multitemporal expansion of agriculture for 33 years using there different satellites/sensors, by applying Principal Components Analysis techniques in order to generate the components of brightness and greenness for each dataset. The use of these components for the Change Vector Analysis can thus provide information on the
Publicado em: 2009
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10. Análise por vetor de mudanças para a avaliação multitemporal e multissensores da cobertura das terras do cerrado / Change vector analysis for multitemporal and multisensor assessment of Cerrado land cover
The main objective was to study the multitemporal expansion of agriculture for 33 years using there different satellites/sensors, by applying Principal Components Analysis techniques in order to generate the components of brightness and greenness for each dataset. The use of these components for the Change Vector Analysis can thus provide information on the
Publicado em: 2009
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11. Evaluation of the broiler locomotors problems using different methodologies of the gait score / Avaliação de problemas locomotores em frangos de corte utilizando diferentes metodologias de gait score
Brazil is today one of the largest poultry meat producer and exporter of the world; however, in order to continue in this production level and quality it is needed to apply animal welfare principles maintaining the same production costs. Locomotors problems keep away the bird from moving freely and to access the needed equipments for its survival: feeder and
Publicado em: 2009
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12. Localização e mapeamento simultâneos com auxílio visual omnidirecional. / Simultaneous localization and mapping with omnidirectional vision.
The problem of simultaneous localization and mapping, known as the problem of SLAM, is one of the greatest obstacles that the field of autonomous robotics faces nowadays. This problem is related to a robots ability to navigate through an unknown environment, constructing a map of the regions it has already visited at the same time as localizing itself on thi
Publicado em: 2008