Look Ahead: Point-and-click robot control

Author Michael C. Anderson
Published
June 21,2017 - 03:45pm

It takes knowledge and skill to get a robot to do exactly what a manufacturer wants it to—and those are hard to come by in this skills-gap era. Even the most competently programmed and automated robot will sometimes need a human operator to take control. 

A new interface designed by Georgia Institute of Technology researchers is reportedly simpler and more efficient than most control interfaces and doesn’t require significant training. The user simply points and clicks on an item, then chooses a grasping method. The robot does the rest of the work.

With a traditional interface, an operator independently controls six degrees of freedom with a computer, turning three virtual rings and adjusting arrows to get the robot into position to grab items or perform a specific task.



Point-and-click control makes robot operation literally easier to grasp. Image courtesy of Georgia Institute of Technology.


With the Georgia Tech interface, “instead of a series of rotations, lowering and raising arrows, adjusting the grip and guessing the correct depth of field, we’ve shortened the process to just two clicks,” stated Sonia Chernova, assistant professor at the university’s School of Interactive Computing who advised the research effort.

The traditional ring-and-arrow system is a split-screen method. The first screen shows the robot and the scene. The second screen provides a 3D, interactive view, where the user adjusts the virtual gripper and tells the robot exactly where to go and what to grab. The point-and-click format provides only the camera view, resulting in a simpler user interface. After a person clicks on an object, the robot’s perception algorithm analyzes the object’s 3D surface geometry to determine where the gripper should be placed. It’s similar to people putting their fingers in the correct locations to grab something. The computer then suggests a few grasps. The user selects one, putting the robot to work.

 “The robot can analyze the geometry of shapes, including making assumptions about small regions where the camera can’t see,” Chernova stated. “Our brains do this on their own. We correctly predict that the back of a bottle cap is as round as what we can see in the front.”

The point-and-click interface was designed to improve ease-of-use of operations for home-assistance robots, space exploration and search-and-rescue operations. It looks like the interface could also be a time-saver for operating or even programming robots for repetitive manufacturing tasks.

For more information about the Georgia Institute of Technology, Atlanta, visit www.gatech.edu or call (404) 894-2000.

Related Glossary Terms

  • degrees of freedom

    degrees of freedom

    Number of axes along which a robot, and thus the object it is holding, can be manipulated. Most robots are capable of maneuvering along the three basic Cartesian axes (X, Y, Z). More sophisticated models may move in six or more axes. See axis.

  • turning

    turning

    Workpiece is held in a chuck, mounted on a face plate or secured between centers and rotated while a cutting tool, normally a single-point tool, is fed into it along its periphery or across its end or face. Takes the form of straight turning (cutting along the periphery of the workpiece); taper turning (creating a taper); step turning (turning different-size diameters on the same work); chamfering (beveling an edge or shoulder); facing (cutting on an end); turning threads (usually external but can be internal); roughing (high-volume metal removal); and finishing (final light cuts). Performed on lathes, turning centers, chucking machines, automatic screw machines and similar machines.

Author

Former Senior Editor
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Michael Anderson, former senior editor at Cutting Tool Engineering magazine, holds a master's degree in written communication from Eastern Michigan University. He has been professionally writing about manufacturing technology since 1998, including more than 10 years at the Society of Manufacturing Engineers.