Research on Underwater Acoustic Detection Algorithm of Aerial Targets Based on Harmonic Set Detection

doi:10.3969/j.issn.1000-1093.2019.05.018

Abstract

Abstract: The line spectrum in noise spectrum has obvious harmonic relation when a propeller-driven aircraft flies over the water surface at a certain height. With the cross-border propagation of noise from air to water and the change of underwater propagation environment, the harmonic relation tends to weaken. To solve this problem, an underwater acoustic detection algorithm based on the combination of harmonic set detection and strongest line detection is proposed, and the detection threshold is adaptively adjusted by using the threshold adjustment factor α, which improves the target detection performance under the condition of the low signal-to-noise ratio at a long distance and can effectively detect the propeller-driven aircrafts in underwater environment. The detection results of the measured signals received by the single hydrophone in water show that the detection distance can reach 2.48 km for a propeller-driven aircraft with a cruise speed of 36 m/s. Key

Key words: propeller-drivenaircraft, underwateracousticdetection, harmonicset, thresholdadjustmentfactor

CLC Number:

TB566

MU Sen， LI Jinghua， ZHANG Heng， CHEN Guo. Research on Underwater Acoustic Detection Algorithm of Aerial Targets Based on Harmonic Set Detection[J]. Acta Armamentarii, 2019, 40(5): 1050-1057.

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第40卷第5期
2019 年5月兵工学报ACTA
ARMAMENTARIIVol.40No.5May2019

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