Laser-Powered Drones: Researchers Develop In-Flight Charging System
Scientists have engineered a lightweight receiver for drones that converts laser light into electricity, potentially enabling continuous flight without landings for battery replacement.
Researchers are developing a novel system to wirelessly charge drones while they are in the air, using a laser beam directed at a receiver integrated into the drone's wings. This technology aims to overcome the significant limitation of battery life that restricts the duration of drone missions.
The core of the system is a perovskite laser cell-thermoelectric (PLC-TE) tandem device, a specialized type of solar cell optimized to capture energy from lasers. This device converts the laser energy into electrical power. To manage the heat generated by high-power lasers, which can degrade efficiency, the researchers incorporated heat-blocking nanocrystals into the device. These nanocrystals act as a thermal barrier, slowing heat transfer and helping the receiver maintain performance.
Initial tests under a green laser demonstrated a promising energy conversion efficiency of 38.49%. To further enhance cooling, the device was strategically placed on a drone's wing, and air channels were incorporated into the wing design. These channels facilitated airflow, cooling the thermoelectric layer and improving overall performance. A stationary drone model equipped with this system successfully powered its propeller when illuminated by a laser, proving the concept's viability.
While the technology has shown significant potential, it is still in its early stages. The next step involves testing the system on a lightweight drone in outdoor conditions to assess its reliability. Future engineering challenges include accurately tracking moving drones with laser beams and ensuring the overall safety of the technology. The researchers envision a future where drones for tasks like forest inspection, disaster monitoring, or package delivery can operate continuously without frequent battery changes.
This development addresses a critical bottleneck in drone operations: battery life. By enabling in-flight recharging via lasers, it moves towards perpetual drone flight. The integration of specialized materials like perovskites and thermoelectric elements, coupled with thermal management strategies, showcases advanced additive manufacturing and materials science principles. This has implications for long-endurance missions in various sectors, including potential future applications in remote sensing and logistics, mirroring broader additive manufacturing goals for enhanced operational capability.
Edited by the news editor with AI from the original report — please refer to the original source.