3D Vision Guided Robotic Charging Station for Electric and Plug-in Hybrid Vehicles
This addresses the problem of manual charging inconvenience for EV and PHEV users, but it is incremental as it applies existing vision and robotic methods to a specific application.
The paper tackles the inconvenient charging process for electric and plug-in hybrid vehicles by presenting an automatic robot-based charging station with 3D vision guidance, demonstrating successful plugging and unplugging in experiments.
Electric vehicles (EVs) and plug-in hybrid vehicles (PHEVs) are rapidly gaining popularity on our roads. Besides a comparatively high purchasing price, the main two problems limiting their use are the short driving range and inconvenient charging process. In this paper we address the following by presenting an automatic robot-based charging station with 3D vision guidance for plugging and unplugging the charger. First of all, the whole system concept consisting of a 3D vision system, an UR10 robot and a charging station is presented. Then we show the shape-based matching methods used to successfully identify and get the exact pose of the charging port. The same approach is used to calibrate the camera-robot system by using just known structure of the connector plug and no additional markers. Finally, a three-step robot motion planning procedure for plug-in is presented and functionality is demonstrated in a series of successful experiments.