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publicado em 02/10/2012 às 14h07:00
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Robot developed at USP recognizes gestures and mimics human

The new functions allow the humanoid robot Nao has more interaction with people around you

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Foto: Davi Marques Pastrelo/ICMC
Robô tem a capacidade de reconhecer e imitar movimentos de seres humanos
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Robô tem a capacidade de reconhecer e imitar movimentos de seres humanos

Robot developed by the Institute of Mathematical Sciences and Computer Science (ICMC), USP has the ability to recognize and imitate movements of humans. The humanoid robot Nao, used in robotics research came with basic functions such as walking, and body movements, arms and legs, and speech reproduction enabled by keyboard. The new functions allow Nao has greater interaction with people.

At the moment, the robot walks in six different ways, forward and backward, sideways and rotating the body. He imitates the movements of the human body, through inflections of legs, knees, arms, elbows, trunk and neck, says researcher Fernando Zuher.

Another function that is humanoid has played interpret orders through gesture commands. Now the Nao robot follows orders that can be given from a gesture. If we point to the right side, it will in this direction, says Roseli Aparecida Francelin Romero, Department of Computer Science of the ICMC. The increased interaction between the robot and the human being is being developed through the use of Kinect, a motion sensor developed for the Xbox 360 video game, made by Microsoft. The Kinect has created a new technology to allow players to interact with video games without the need to use controls (joysticks), innovating the field of gameplay.

Zuher clarifies that the Kinect motion calculates and generates data on the position of each member of the body in 3D through the joints, such as elbows and knees. Each junction is represented in 3D, the axes X, Y and Z. As the rotation matrix was not as stable when the tests were done, he had to transform the data matrix to Euler angles. By means of the apparatus, we transfer the rotation matrix for the Euler angle. Through this, a calculation is made where the robot rotates the joints, such as knees, arms, elbows and neck, describes Zuher.

<b> Movements </ b>

Professor Roseli notes that the robot's movements are still limited, mainly due to its size. He is about 60 inches tall, which makes simple tasks such as climbing stairs. In the case of movement of the neck, the neck Zuher said human has three different movements, whereas only two robot, sideways and up and down.

Among the future projects for the Nao, Roseli account you want to make him go to understand human speech, and that can interpret them and respond to them through a database. This will make the robot more human, which will cause it to interact more with people, answering questions and formulating answers, Roseli said. The researcher explained that there are plans for the robot to assist elementary students in learning mathematics.

Another future plan is the creation of a football team of humanoid robots to participate in the RoboCup, a competition that brings together the best teams in the world and will be held in Brazil in July 2014, in João Pessoa (Paraíba), in parallel to the World Cup Football World. The current equipment was purchased by the ICMC by the French company Aldebaran Robotics with funding from Foundation for Research Support of the State of São Paulo (FAPESP).

The Computing Group Bioinspirada ICMC own tradition in robot soccer. The Warthog Robotics team, a partnership with the ICMC Engineering School of São Carlos (EESC) has participated in the RoboCup 2011 and has won national tournaments in the category Very Small Size. Roseli said the group has conducted several studies with robots in this category, such as recognition of teammates, calculating the trajectory of movement of the robots and ball control. Now the goal is to improve the algorithms of trajectory of the ball and apply the robots Naos, and also acquire new robots of this kind, concludes.

<i> With the information USP </ i>

   Palavras-chave:   Robot    Nao    Institute of Mathematical Sciences and Computer    ICMC    USP    Universidade de São Paulo    São Carlos   
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