After demonstrating the first acoustically driven tractor beam platform, researchers develop a simpler, cheaper version using 3-D printable parts and open-source electronic components for the maker community
Last year Asier Marzo, then a doctoral student at the Public University of Navarre, helped develop the first single-sided acoustic tractor beam — that is, the first realization of trapping and pulling an object using sound waves from only one direction. Now a research assistant at the University of Bristol, Marzo has lead a team that adapted the technology to be, for all intents and purposes, 3-D printable by anyone (with some assembly required, of course).
In addition to a fully detailed how-to video that the group produced for the public, the results of the work developing this do-it-yourself, handheld acoustic tractor beam will appear this week as an open access paper in Applied Physics Letters, from AIP Publishing.
Sonic levitation is not new, and the use of sound waves to push around macroscopic objects, or create patterns in resting sand and flowing water, is scattered throughout YouTube and has been for years. This technology, however, is not simply sonic levitation, using sound to push objects around.
Based on similar fundamental physics used for decades to create optical traps, these tractor beams are true to their name in that they pull objects, trapping small beads — and even insects — at their foci.
“The most important thing is that it can attract the particle towards the source,” said Marzo. “It’s very easy to push particles from the source, but what’s hard is to pull them toward the source; to attract the particles. When you move the tractor beam, the particle moves, but otherwise the trap is static. It can levitate small plastics; it can also levitate a fly and small biological samples. It’s quite handy.”
The first versions of the device that proved the concept possible were not much larger than these new, 3-D printable versions. However, their underlying technology was more complex and required expensive electronics.
Much of the expense arose from the array of active components that electronically shaped sound waves, manipulating how and where they interfere to create the resulting object-trapping environment just above the array.
“Previously we developed a tractor beam, but it was very complicated and pricey because it required a phase array, which is a complex electronic system,” Marzo said. “In this paper, we made a simple, static tractor beam that only requires a static piece of matter.”
The simplicity (and affordability) of this passive, static-matter approach comes from the special architecture of that matter, designed to replace the phase array components and to shape sound waves structurally instead of electronically. As the sound, which now can be generated from a single source, passes through these carefully designed elements, the waves are shaped by the internal structure of the 3-D printed material.
“We can modulate a simple wave using what’s called a metamaterial which is basically a piece of matter with lots of tubes of different lengths. The sound passes through these tubes and when it exits the metamaterial, it has the correct phases to create a tractor beam,” said Marzo.
With an effect that is primarily determined by the shape of the tubes, the research team focused on optimizing the design to allow fabrication with common 3-D printers, ensuring it could be constructed even by at-home hobbyists.
According to Marzo, this was primarily a challenge in resolution, requiring a design that would not suffer from the limited precision of lower-end 3-D printer nozzles. “We needed to engineer the tubes very well to allow them to be 3-D printed with a normal 3-D printer. A normal 3-D printer has a lot of limitations,” he said.
With those limitations overcome, the group developed the rest of the tractor beam system using easily accessible components, such as from the popular open-source electronics supplier, Arduino. They even produced a detailed how-to video for its construction, a link to which is included below. “There will be a set of instructions with a list of the needed components and a step-by-step video. The components are very simple, like an Arduino and a motor driver, and everything can be bought on Amazon for less than £50 (about $70),” Marzo said.
Besides seriously impressing dinner guests, these DIY tractor beams have many potential uses and may even become a new tool for studying low-gravity effects on biological samples. Marzo pointed out this type of “micro-gravity” research is already of interest and encouraged biologists to find their own applications for the device.
“Recently there have been several papers about what happens if we levitate an embryo, how does it develop? Or what happens if we levitate bacteria?” he said. “For instance, they discovered salmonella is three times more [virulent] when it’s levitated. Certain microorganisms react differently to microgravity.”
There are three designs of the device, each with trapping profiles suitable for different object sizes relative to the wavelength of sound used. However, even for the full lab implementation where the group traps heavier objects and even liquids, trapping objects larger than half the wavelength of sound still poses a challenge. For practical frequencies, just above what humans can hear, this limits the size of trappable objects to a few millimeters.
As Marzo and his group work to overcome this challenge and continue to improve the capabilities of their tractor beams, the democratization of their technology paves the way for untold uses and tweaks from the maker community. So, the question really is — what would you do with your own tractor beam?
Learn more: How to 3-D Print Your Own Sonic Tractor Beam
[osd_subscribe categories=’tractor-beam-2′ placeholder=’Email Address’ button_text=’Subscribe Now for any new posts on the topic “TRACTOR BEAM”‘]
Receive an email update when we add a new TRACTOR BEAM article.
The Latest on: Tractor beam
[google_news title=”” keyword=”tractor beam” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
via Google News
The Latest on: Tractor beam
- Space tractor beams may not be the stuff of sci-fi for longon June 1, 2023 at 12:59 pm
On Feb. 10, 2009, disaster struck hundreds of miles above the Siberian Peninsula. That evening, a defunct Russian satellite orbiting Earth crashed into a communications satellite called Iridium 33 ...
- The college baseball team shattering HBP records is playing for the D-III World Serieson June 1, 2023 at 7:10 am
A college baseball team you’ve never watched is outsmarting the competition with a painfully simple concept: If a pitch is coming at you, do not move.
- 10 Greatest Ship Entrances In Star Trekon May 25, 2023 at 11:51 pm
Star Trek: Picard's third season is going to become one of the most talked-about seasons of Trek for years to come, and moments like this are a clear example as to why. There are simply so many ...
- Star Trek-inspired tractor beam could enable contact-free, targeted drug deliveryon May 10, 2023 at 5:00 pm
The so-called tractor beam uses surround sound to create a force field that keeps the object in place. By adjusting the output of the loudspeaker, the object also can be moved or rotated. The research ...
- Even If I Could Take Off, I Could Never Get Past The Tractor Beam!on May 6, 2023 at 5:00 pm
Finally our childhood dreams of a working tractor beam are coming to fruition! It’s called acoustic levitation and it actually uses highly concentrated sound waves to float small objects by ...
- tractor beamon April 12, 2023 at 5:00 pm
Don’t blame us for the click-baity titles in the source articles about this handheld “acoustic tractor beam”. You can see why the popular press tarted this one up a bit, even at the risk of ...
- Scientists Build Working Tractor Beam, Although It's Comically Tinyon January 28, 2023 at 7:39 am
Scientists have built a real-life tractor beam that can pull actual objects using nothing but light. But it has one big drawback: it's absolutely tiny. Despite its still tiny size, the new tractor ...
- Scientists Actually Did It: They Built a Real Working Tractor Beamon January 26, 2023 at 1:04 pm
Tractor beams have long been a staple of sci-fi, but you might not know that they’ve also existed in the real world for some time, albeit at a very small scale. Microscopic tractor beams ...
- Could We Levitate Humans With the World’s Most Powerful Acoustic Tractor Beam?on November 15, 2022 at 4:36 pm
In a sci-fi feeling first, engineers at the University of Bristol used the world's most powerful acoustic tractor beam to demonstrate that it's possible to stably contain objects larger than the ...
via Bing News