How does a palm-sized levitator glide at 10 mph?

Researchers at Yokohama National University have unveiled a palm-sized levitation device that can travel at speeds exceeding 3 meters per second, roughly equivalent to 10 miles per hour. The breakthrough eliminates physical contact with surfaces, reducing friction to near zero.

The prototype operates without the cumbersome power and data cables that have long hampered acoustic levitation systems, using a wireless drive circuit to control both movement and levitation height with high stability.

How the levitation system works

The device uses acoustic levitation, creating a stable air cushion that supports its weight above the surface. A piezoelectric actuator generates a thin “squeeze film” of air, acting as a microscopic lubricant that removes almost all contact resistance.

This allows the platform to glide freely in any direction, with precise positioning and control. The wireless design makes it truly untethered, enabling use in tight spaces without cable interference.

Did you know?
Acoustic levitation is powerful enough to suspend tiny objects, and even small animals, by using sound waves tuned to precise frequencies.

Performance on different surfaces

Tests indicated that the levitator can move uphill on surfaces inclined up to 10 degrees while maintaining speed and stability. Without the levitation system active, the device was unable to overcome the same incline, illustrating the value of lift.

It can carry payloads up to 43 grams while maintaining performance, on top of its own 150-gram weight, making it suitable for transporting delicate or small-scale components.

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Potential applications

The technology could benefit sectors where speed, precision, and cleanliness are essential. In microelectronics manufacturing, it could replace traditional conveyor belts, avoiding vibration and contamination. In biomedical labs, it can transport cells or samples without mechanical damage.

By removing friction and physical contact, the system also reduces wear and maintenance needs, potentially extending equipment lifespan in industrial settings.

Future development plans

The research team aims to enhance stability on irregular surfaces and under variable loads. They are exploring designs where multiple levitation units operate together as mobile robotic platforms, handling complex movements and tasks.

Funding came from the Nakanishi Scholarship Foundation, the NSK Foundation for the Advancement of Mechatronics, and the Takahashi Industrial and Economic Research Foundation. The work points toward a new generation of contactless, high-speed transport tools for advanced manufacturing.