Robot to Human Object Handover using Vision and Joint Torque Sensor Modalities
This addresses the challenge of seamless and implicit handover in human-robot interaction, though it is incremental as it builds on existing sensor-based methods.
The paper tackles the problem of autonomous robot-to-human object handover by developing an algorithm that uses joint torque and vision sensors with deep neural networks to detect human intention and grip, achieving 98% accuracy in real experiments.
We present a robot-to-human object handover algorithm and implement it on a 7-DOF arm equipped with a 3-finger mechanical hand. The system performs a fully autonomous and robust object handover to a human receiver in real-time. Our algorithm relies on two complementary sensor modalities: joint torque sensors on the arm and an eye-in-hand RGB-D camera for sensor feedback. Our approach is entirely implicit, i.e., there is no explicit communication between the robot and the human receiver. Information obtained via the aforementioned sensor modalities is used as inputs to their related deep neural networks. While the torque sensor network detects the human receiver's "intention" such as: pull, hold, or bump, the vision sensor network detects if the receiver's fingers have wrapped around the object. Networks' outputs are then fused, based on which a decision is made to either release the object or not. Despite substantive challenges in sensor feedback synchronization, object, and human hand detection, our system achieves robust robot-to-human handover with 98\% accuracy in our preliminary real experiments using human receivers.