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Research on Underwater Hull Surface Imaging Method Based on Ultrasonic Phased Array |
YE Xiao-tong,ZHAO Peng,ZHENG Ke,WANG Yue-bing,ZHENG Hui-feng |
School of Measurement and Testing Engineering, China Jiliang University, Hangzhou, Zhejiang 310018, China |
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Abstract To solve the problem of lack of equipment, high cost and large errors on underwater hull surface imaging, a method based on ultrasonic phased array technology is proposed. The underwater hull surface is scanned by the focused sound beam emitted by a 1-D linear ultrasonic phased array transducer. Acoustic scattering occurs on the hull surface and echo signal is received by the transducer. The 3-D model of the underwater hull surface is reconstructed using the point cloud data of these scattering points calculated by hyperbolic intersection method. Experiment of underwater hull-model surface imaging is implemented. The result shows that the method has high imaging resolution and can accurately reconstruct the 3-D model of the underwater hull surface with a reconstruction error no more than 5mm.
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Received: 11 March 2019
Published: 19 December 2019
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