A 3D laser scanning strategy based on cascaded deep neural network is proposed for the scanning system converted from 2D Lidar with a pitching motion device.The strategy is aimed at moving target detection and monitoring.Combining the device characteristics,the strategy first proposes a cascaded deep neural network,which inputs 2D point cloud,color image and pitching angle.The outputs are target distance and speed classification.And the cross-entropy loss function of network is modified by using focal loss and uniform distribution to improve the recognition accuracy.Then a pitching range and speed model are proposed to determine pitching motion parameters.Finally,the adaptive scanning is realized by integral separate speed PID.The experimental results show that the accuracies of the improved network target detection box,distance and speed classification are 90.17％,96.87％and 96.97％,respectively.The average speed error of the improved PID is 0.4239°/s,and the average strategy execution time is 0.1521 s.The range and speed model can effectively reduce the collection of useless information and the defor-mation of the target point cloud.Conclusively,the experimental of overall scanning strategy show that it can improve target point cloud integrity and density while ensuring the capture of target.

Xiao-bin Xu;Ming-hui Zhao;Jian Yang;Yi-yang Xiong;Feng-lin Pang;Zhi-ying Tan;Min-zhou Luo

College of Mechanical&Electrical Engineering,Hohai University,Changzhou,213022,China;Jiangsu Key Laboratory of Special Robot Technology,Hohai University,Changzhou,213022,China;College of Mechanical Engineering,Yangzhou University,Yangzhou,225127,China

防务技术

[1]Xiao-bin Xu;Ming-hui Zhao;Jian Yang;Yi-yang Xiong;Feng-lin Pang;Zhi-ying Tan;Min-zhou Luo-.3D laser scanning strategy based on cascaded deep neural network)[J].防务技术,2022(09):1727-1739

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