Utilizing Vibration To Make Stuff Stick Contact-Free To Ceilings

Generally making stuff keep on with one thing like a ceiling requires resorting to suction cups, glue or one thing way more everlasting, however [Steve Mould] begins his video that includes a playing card that is clearly defying gravity with no such measures. All that it appears to take is the small vibration motor positioned on stated taking part in card, with its vibrations making the cardboard stick like a form of magic trick.

Although the simple rationalization can be that it creates a form of Bernoulli grip – a typical pneumatic, contactless gripping system – [Steve] explains the way it’s extra advanced than that. This vibration adhesion impact doesn’t depend on the identical fixed stress drop {that a} Bernoulli grip experiences inside the small hole between the floor and the article. Although a niche is current, it’s a lot smaller on this case.

Of observe is that this impact solely happens when the article is product of a versatile sufficient materials that may vibrate together with the vibration supply, within the type of a motor or transducer. As demonstrated within the video, this creates standing waves that have an effect on the encircling air. When pushed towards a inflexible floor, these standing waves turn into travelling waves, which end result within the air that enters this small hole continually being pushed out and thus reducing the air stress.

The air stress between the inflexible and versatile surfaces thus turns into decrease than that of the encircling air, creating the ensuing suction impact with out touching the floor as one thing like a suction cup would.

One can think about sensible makes use of for this impact very like with Bernoulli grips. These are particularly frequent within the semiconductor business for dealing with delicate gadgets like silicon wafers with zero threat of contamination. In the video it’s proven how you should use the impact to even maintain the burden of an individual, although they did not get previous a couple of dozen kilograms with the used setup involving a 400 Watt transducer, probably attributable to their ‘ceiling’ not being inflexible sufficient, resulting in power loss.

There are additionally papers comparable to this 2025 one by [Siquan Li] et al. who recommend a ‘Micro-Vibration Adhesion’  (VBA) system to assist small robots climb up partitions to be used in repairs and inspection. In their experimental setup they discovered an adhesion-to-weight ratio exceeding 51 instances, making it an fascinating strategy to have small robots defy gravitational pull with no sophisticated mechanism.