Abstract: A location tracking system includes a plurality of markers disposed on a fixture in an area having an absolute coordinate in the factory, an image collecting device fixedly attached to a tracking target for management, configured to recognize an absolute location of a reference marker detected by a visual odometry (VO) method in an image captured by a camera, and estimate a relative location based on the absolute location of the reference marker; and a server configured to track a location of the target based on the relative location received through a wireless communication from the image collecting device.

Abstract: A charge feeding system includes: a frame extending in a direction parallel to a direction of gravity; a plurality of grippers which are attached to the frame, spaced apart from one another in the extension direction of the frame, and independently open and close to grip charges loaded in a charge loading unit; a tray configured to pass through locations where the grippers are disposed along the extension direction of the frame, and transfer the charges between the grippers; and a controller configured to control opening and closing of the grippers and movement of the tray.

Abstract: A charge feeding system includes: a frame extending in a direction parallel to a direction of gravity; a plurality of grippers which are attached to the frame, spaced apart from one another in the extension direction of the frame, and independently open and close to grip charges loaded in a charge loading unit; a tray configured to pass through locations where the grippers are disposed along the extension direction of the frame, and transfer the charges between the grippers; and a controller configured to control opening and closing of the grippers and movement of the tray.