海底钴结壳采矿车微地形导向声纳探测的圆形阵设计-中南大学学报.PDF

41 3 () Vol.41 No.3 2010 6 Journal of Central South University (Science and Technology) Jun. 2010 12 (1. 310018 2. 410082) Fourier 5.5 dB (14 ) (0˚, −36˚, −54˚, 72˚)11 ; TB565+ .2; TP391.4 A 1672−7207(2010)03−0953−07 Ocean cobalt crusts mining vehicle tiny terrain direction sonar based on circular ultrasonic array WANG Qiang1, E Jia-qiang2 (1. Department of Quality and Safety Engineering, China Jiliang University, Hangzhou 310018, China; 2. College of Mechanical and Automotive Engineering, Hunan University, Changsha 410082, China) Abstract: Based on the fact that deep ocean mining vehicle uses linear array transducers to survey terrain, it gains deep sea cobalt crusts terrain, however, it can not discriminate multi-direction echoes, and uncertainties associated with the estimation of scatters depths are not completely explained, a 14-element uniform circular array was presented to gain cobalt crust terrain. For real-time processing, a fast beamforming algorithm within Fourier framework was proposed to improve computational efficiency. The results show that the planar circular array owns horizontal and vertical discrimination ability. In simulation, it gains high direction of arrival (DOA) discrimination ability, and main lobe is 5.5 dB higher than sidelobes power. To estimate the system’s performance, the multi-cobalt crust convex objects localization test at elevation angle (0˚, −36˚, −54˚, 72˚) can be carried out in shallow water. Key words: ocean tiny-terrain; cobalt crust; sonar signal; circular array; beam