Journal of Applied Optics, Volume. 46, Issue 3, 496(2025)
Detection and recognition of multiple types of small rotary-wing drones based on optical fiber EFPI acoustic sensor
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Fig. 1. Structure diagram and physical image of optical fiber EFPI acoustic sensor
Fig. 2. Time-domain response of optical fiber EFPI acoustic sensor and electrical microphone at different frequencies
Fig. 4. DJI Spark and DJI Matrice100 drone acoustic signals and characteristic spectra
Fig. 6. Performance of CNN-LSTM on test dataset with STFT as feature extraction method
Fig. 7. Performance of CNN-LSTM on test dataset with Mel Spectrogram as feature extraction method
Fig. 8. Performance effect of CNN-LSTM network model on test set with electrical microphone as acquisition device
Fig. 9. Performance of CNN-LSTM network model in five-class classification experiment
Table 1. Comparison of experimental metrics under different feature extraction methods
% View tableView in ArticleTable 1. Comparison of experimental metrics under different feature extraction methods
% 评估指标 二分类实验 三分类实验 MFCC STFT MEL MFCC STFT MEL Acc 99.50[ 16 ]95.29 96.03 97.52[ 16 ]95.29 95.04 Pre 99.51[ 16 ]95.54 96.25 97.52[ 16 ]95.34 95.03 Recall 99.50[ 16 ]95.29 96.03 97.52[ 16 ]95.29 95.04 F1score 99.50[ 16 ]95.28 96.03 97.52[ 16 ]95.28 95.02
Table 2. Experimental indicators of electro-acoustic microphone as acquisition device
View tableView in ArticleTable 2. Experimental indicators of electro-acoustic microphone as acquisition device
实验 Acc Pre Recall F1score 二分类 0.975 2 0.975 4 0.975 2 0.975 2 三分类 0.955 3 0.955 2 0.955 3 0.955 2
Table 3. Evaluation indicators of five categorical experiment
View tableView in ArticleTable 3. Evaluation indicators of five categorical experiment
Acc Pre Recall F1score 0.953 3 0.954 3 0.953 3 0.953 3
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Rou DING, Qichao ZHAO, Haoqi WANG, Lin YANG, Hongzhao REN, Shuang XIAO, Bin LIU. Detection and recognition of multiple types of small rotary-wing drones based on optical fiber EFPI acoustic sensor[J]. Journal of Applied Optics, 2025, 46(3): 496
Paper Information
Category: SPECIAL COLUMN ON UNMANNED INTELLIGENT SENSING TECHNOLOGY
Received: Jan. 13, 2025
Accepted: --
Published Online: May. 28, 2025
The Author Email: Bin LIU (刘彬)
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