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Sensors 2018, 18(4), 1182; doi:10.3390/s18041182

A Three-Dimensional Target Depth-Resolution Method with a Single-Vector Sensor

1,2,3,4
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,
1,2,3,* , 1,2,3
and
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1
Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
2
Key Laboratory of Marine Information Acquisition and Security, Harbin Engineering University, Ministry of Industry and Information Technology, Harbin 150001, China
3
College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China
4
National Key Laboratory of Science and Technology on Underwater Acoustic Antagonizing, China State Shipbuilding Corporation Systems Engineering Research Institute, Beijing 100036, China
*
Author to whom correspondence should be addressed.
Received: 17 March 2018 / Revised: 9 April 2018 / Accepted: 10 April 2018 / Published: 12 April 2018
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [17357 KB, uploaded 12 April 2018]   |  

Abstract

This paper mainly studies and verifies the target number category-resolution method in multi-target cases and the target depth-resolution method of aerial targets. Firstly, target depth resolution is performed by using the sign distribution of the reactive component of the vertical complex acoustic intensity; the target category and the number resolution in multi-target cases is realized with a combination of the bearing-time recording information; and the corresponding simulation verification is carried out. The algorithm proposed in this paper can distinguish between the single-target multi-line spectrum case and the multi-target multi-line spectrum case. This paper presents an improved azimuth-estimation method for multi-target cases, which makes the estimation results more accurate. Using the Monte Carlo simulation, the feasibility of the proposed target number and category-resolution algorithm in multi-target cases is verified. In addition, by studying the field characteristics of the aerial and surface targets, the simulation results verify that there is only amplitude difference between the aerial target field and the surface target field under the same environmental parameters, and an aerial target can be treated as a special case of a surface target; the aerial target category resolution can then be realized based on the sign distribution of the reactive component of the vertical acoustic intensity so as to realize three-dimensional target depth resolution. By processing data from a sea experiment, the feasibility of the proposed aerial target three-dimensional depth-resolution algorithm is verified. View Full-Text
Keywords: aerial target; depth resolution; three-dimensional; multi-target; Monte Carlo aerial target; depth resolution; three-dimensional; multi-target; Monte Carlo
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Zhao, A.; Bi, X.; Hui, J.; Zeng, C.; Ma, L. A Three-Dimensional Target Depth-Resolution Method with a Single-Vector Sensor. Sensors 2018, 18, 1182.

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