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Publication
Interação com sistema de infotainment de um veículo, implementação e avaliação de gestos e técnicas hápticas
| Name: | Description: | Size: | Format: | |
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| 3.96 MB | Adobe PDF |
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Advisor(s)
Abstract(s)
Atualmente, a maioria dos fabricantes automóveis incorpora um ecrã táctil no
sistema de infotainment dos seus veículos. Ao contrário de interfaces tradicionais,
compostas por controlos físicos e tangíveis, como botões, os ecrãs tácteis não permitem
receber feedback táctil sobre o posicionamento, forma, ou outras caraterísticas dos
controlos. Isto leva a que a interação com estes dispositivos requeira a atenção visual do
utilizador. Sendo a condução uma tarefa principalmente visual, constata-se que o uso
destes sistemas modernos leva a um aumento da distração do condutor e,
consequentemente, do risco de acidente ou quase-acidente.
Para resolver estas desvantagens, este trabalho teve como objetivo a criação de um
sistema inovador que permita interagir com o ecrã táctil de um sistema de infotainment
moderno de uma forma mais intuitiva e com menos dependência da atenção visual do
utilizador. Para tal, foi idealizado e desenvolvido um sistema composto por dois módulos
– um módulo responsável pela interação com o ecrã táctil, e um módulo responsável por
proporcionar feedback háptico ao utilizador. O primeiro módulo consiste num sistema de
rastreio da mão que permite traduzir o gesto de apontar para o ecrã em uma posição
discreta, permitindo fornecer feedback ao utilizador antes de realizar o toque. O segundo
módulo consiste num conjunto de atuadores hápticos montados no volante, onde o
condutor assenta a sua mão esquerda. Este módulo permite transmitir informação
pertinente na forma de padrões de vibração. Os módulos foram desenvolvidos
independentemente e integrados no sistema final após as iterações necessárias. O sistema foi avaliado através de um conjunto de tarefas comuns realizadas nos
sistemas de infotainment, e foi comparado com a interação tradicional com estes sistemas,
sem qualquer tipo de feedback háptico ou método de interação invulgar. Foram registadas
métricas relevantes, tais como número de desvios visuais para fora da estrada, duração
total desses desvios, desvio na condução, e carga de trabalho subjetiva.
O sistema alcançou as expetativas, levando a uma melhoria em várias das métricas
registadas, e não piorou a qualidade da condução nem a carga subjetiva de trabalho,
apesar de introduzir feedback e uma nova técnica de interação.
Nowadays, most carmakers incorporate touchscreens in their vehicles’ infotainment system. Unlike traditional interfaces, with tangible, physical controls, like buttons, touchscreens aren’t capable of transmitting tactile feedback about the controls’ positioning, shape, or other physical characteristics. This means that interacting with these devices requires the user’s visual attention. As driving is a mainly visual task, using these systems leads to increased driver distraction and, consequently, increased risk of accident or near-accident. To solve these disadvantages, this body of work’s main focus was creating an innovative system that allows interacting with a modern infotainment system’s touchscreen in a more intuitive fashion that requires less visual attention by the user. To accomplish this goal, a system was idealized, composed by two modules – a module responsible for the interaction with the touchscreen, and a module responsible for providing the user with haptic feedback. The first module consists of a system that tracks the user’s hand and translates the pointing gesture to a discrete position on the screen, allowing the system to provide feedback before the user touches the screen. The second module consists of a set of haptic actuators mounted on the steering wheel, where the driver rests his/her left hand. This module allows the transmission of relevant information in the form of vibration patterns. The modules were developed independently and integrated in the final system after the necessary iterations. The system was evaluated through a set of tasks commonly performed in infotainment systems, and was compared against traditional interaction with these systems, without any type of feedback or unusual interaction method. Relevant metrics, such as number of glances outside the road, the total duration of those glances, driving deviation, and subjective workload, were recorded. The system met expectations, leading to improvements across several of the recorded metrics, and did not negatively affect driving performance or the subjective workload, despite introducing feedback and a new interaction technique.
Nowadays, most carmakers incorporate touchscreens in their vehicles’ infotainment system. Unlike traditional interfaces, with tangible, physical controls, like buttons, touchscreens aren’t capable of transmitting tactile feedback about the controls’ positioning, shape, or other physical characteristics. This means that interacting with these devices requires the user’s visual attention. As driving is a mainly visual task, using these systems leads to increased driver distraction and, consequently, increased risk of accident or near-accident. To solve these disadvantages, this body of work’s main focus was creating an innovative system that allows interacting with a modern infotainment system’s touchscreen in a more intuitive fashion that requires less visual attention by the user. To accomplish this goal, a system was idealized, composed by two modules – a module responsible for the interaction with the touchscreen, and a module responsible for providing the user with haptic feedback. The first module consists of a system that tracks the user’s hand and translates the pointing gesture to a discrete position on the screen, allowing the system to provide feedback before the user touches the screen. The second module consists of a set of haptic actuators mounted on the steering wheel, where the driver rests his/her left hand. This module allows the transmission of relevant information in the form of vibration patterns. The modules were developed independently and integrated in the final system after the necessary iterations. The system was evaluated through a set of tasks commonly performed in infotainment systems, and was compared against traditional interaction with these systems, without any type of feedback or unusual interaction method. Relevant metrics, such as number of glances outside the road, the total duration of those glances, driving deviation, and subjective workload, were recorded. The system met expectations, leading to improvements across several of the recorded metrics, and did not negatively affect driving performance or the subjective workload, despite introducing feedback and a new interaction technique.
Description
Keywords
Interação com sistemas Técnicas hápticas Implementação e avaliação infotainment Engenharia Informática . Faculdade de Ciências Exatas e da Engenharia