What problem does it solve?

On any drone mission in cold or icing conditions, a critical dilemma exists: protect against ice with continuous heating that drains the battery margin needed for flight time, or fly unprotected and risk losing lift and control when ice forms undetected. Existing solutions force that choice: passive coatings only delay ice formation without detecting it, and active heating systems run continuously regardless of whether ice is present, wasting power that electric UAVs cannot spare.

How does it work?

Our solution is a triboelectric nanogenerator (TENG) sensor embedded directly in the propeller blade that generates its own electrical signal due to charge transfer in the physical events of icing, raindrop impact, the water-to-ice phase transition, and ice detachment, with zero external power required. A compact data acquisition module reads this signal and triggers thermal de-icing only where and when ice is detected. The same electrodes that sense ice also function as heaters, making the system fully integrated with no additional hardware footprint on the blade.

How is it novel and what are the benefits?

No existing ice sensor generates its own detection signal from the icing event itself. Ours does, delivering three decisive benefits:

• Benefit 1: It detects what no other ice sensor can. Existing optical, capacitive, and magnetostrictive sensors infer ice indirectly and all require continuous power. Our sensor responds directly to the ice-formation event itself, producing its own detection signal with zero external power draw.

• Benefit 2: It confirms the ice is actually gone. Most systems assume de-icing succeeded once a fixed heating cycle ends. They have no way to verify it. Our sensor responds to ice detachment, closing a control loop no incumbent system can close.

• Benefit 3: It protects without touching the battery. Heating activates only at the location and moment ice is detected. Drones in icing conditions no longer face a trade-off between protection and flight time.

Where would it be applied and what is the market potential?

The primary market is defense UAV operators and manufacturers in North America and NATO-allied countries, with direct applications in ISR, infrastructure inspection, and logistics. The global military drone market is projected to grow from $35 billion to $109 billion by 2031. Any drone platform can be retrofitted without redesign. The same sensing principle extends to wind turbine blades and fixed-wing aircraft, and the broader ice protection market is expected to reach $189.3 billion by 2030, positioning this technology at the intersection of two rapidly expanding industries.

How would it be manufactured and what would it cost?

The system consists of a bilayer sensor coating sprayed directly onto existing propeller blade surfaces and a compact data acquisition module using commercially available electronics, no new manufacturing lines, structural modifications, or airframe redesign required. Unlike optical and microwave ice detection systems, which require dedicated hardware, custom mounting structures, and significant installation work, our approach eliminates all of that, reducing unit cost and retrofit complexity to a fraction of what incumbents demand.