Acoustic levitation device handles delicate items without contact

Researchers at Yokohama National University have developed a compact, untethered acoustic levitation device capable of moving delicate components with high precision and without physical contact. Unlike traditional mechanical transport systems that introduce friction and risk damaging sensitive parts, this device uses sound waves to levitate objects, eliminating surface contact and associated vibrations. Its wireless drive circuit overcomes the limitations of conventional acoustic levitation platforms that rely on cables, enabling stable levitation height and high-speed, omnidirectional movement on various flat surfaces, including inclined planes. The device, driven by a piezoelectric actuator generating a squeeze film for frictionless motion, can transport payloads up to approximately 43 grams smoothly within a total supported weight of 150 grams. Its compact, centimeter-scale design suits confined, clean environments such as electronics assembly, chemical handling, and biomedical applications where contamination risks must be minimized. Experimental results confirmed the system’s agility, speed exceeding three meters per second, and alignment with theoretical models. Future plans include linking multiple units