University of Minnesota engineers have developed a new way to move objects without making physical contact. The technique uses ultrasonic waves acting on specialized metasurfaces to move objects in different directions. Touchless manipulation is a growing area of research (I tell you about it also in this post), and could transform different aspects of our lives, starting with logistics.
How does this new metasurface technology work?
In research published in the journal Nature Communications (I link it to you here) describes in detail the technique, used until yesterday mainly to move very small and light objects, which limited its usefulness. The new study shows that even large objects can now be moved. The "contraindication" is that the objects to be moved must be equipped with a special surface, based on a metamaterial that reflects the ultrasonic waves in order to move the object in different directions. An "obstacle" that would not prevent its use for specific repetitive movements (as in production lines) or for objects of other kinds.
Take a look at the video below to get an idea.
Move objects without touching them? Sounds good
"What sets our research apart is that we can manipulate and trap much larger objects if we transform their surfaces into metasurfaces," says the study's senior author. Ognjen Ilic. “When we place these tiny patterns on the surface of objects, we can basically reflect sound in any direction we want. And by doing so, we can control the acoustic force that is exerted on an object."
Now that I know how to move objects without touching them, the sky's the limit! In theory, if covered with this material even a sofa can be moved at will with ultrasound. I can't wait to direct a contraption in the direction of the wardrobe and have it move itself to clean in otherwise inaccessible places. I know, I don't have big expectations. At least until we can move the objects directly in thought, I say.
