Development of an Advanced System for Identifying Low-Altitude Outdoor Mobile Objects Based on Acoustic Signatures
Yiyang Luo, Oleksandr Soboliak, В. И. Луценко, Ирина Владиславовна Луценко, Vadym Yehorov, Serhii Yehorov, Trifanov Vitalii · IntechOpen eBooks · 2024
This chapter introduces an acoustic-based detection system for low-altitude moving objects, including unmanned aerial vehicles, helicopters, and ground vehicles. The system analyzes acoustic spectra, revealing discrete harmonics from engine rotations and a continuous spectrum from engine operations, with energy primarily below 2 kHz. Harmonic spacing helps estimate rotor speeds for helicopters, while high engine revolutions per minute enhance the continuous spectrum component. Key challenges addressed include target differentiation, bearing estimation accuracy, environmental noise impact, and the need for meteorological adjustments. Experimental results show that high-pass filters with a 500–700 Hz rejection band improve target detection contrast and reduce noise interference. Future work will focus on advanced noise suppression, meteorological data integration, and multisensor fusion to enhance system performance and scalability.