The sense of touch is a defining characteristic for human beings. Contrary to other senses like seeing and hearing, the sense of touch is not easily as quantifiable. The development of a tactile sensor for the restitution of physical contact is a challenging enterprise for the field of robotics. Tactile detection is crucial for interaction between robots, objects, and humans. As a result, the voluntary and involuntary action of touching generates important information concerning the control of forces. This document will present the development of a new multimodal tactile sensor for a robotic grasper. This study synthesizes the prototype and optimization of the sensor. The capacitative technology is used to measure forces at the surface of the sensor. Due to the high-spatial resolution, the sensor is able to recognize the forms and the details of specific objects that it manipulates. Besides static detection, the sensor is able to find and detect dynamic events, like the sensation of slippage or vibrations, with the same principle of transduction. Finally, the addition of an inertial measurement unit inside the sensor permits it to estimate its position in its environment and also detect dynamic events. All of these capabilities come together to create a complete sensor which enables a robotic grasper to interact with its surroundings.
Keywords:
tactile sensor; capacitive sensor;static tactile sensing;dynamic tactile sensing; inertial measurement unit