Sensor fusion of two sonar devices for underwater 3D mapping with an AUV

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We present herein a three-dimensional (3D) mapping method in one-way rectilinear scanning with an autonomous underwater vehicle (AUV) equipped with a forward looking sonar (FLS) and a profiling sonar (PS). Three-dimensional reconstruction using sonar with a finite beam width is an ill-posed problem, and additional constraints also need to be considered. Our approach involves an additional sonar and fuse acoustic measurements provided by the two sonar sensors. The FLS has a high resolution in the horizontal scan but has a uncertainty in the vertical scan. Meanwhile, the PS provides a reliable vertical profile, but its beam width is extremely narrow. An initial map is generated by the FLS and refined by combining the PS vertical scan data. To demonstrate the validity and effectiveness of the proposed method, we conducted tests in a water tank and also at sea. Finally, we presented the results of the proposed method gathered by an AUV in the tests.
Publisher
SPRINGER
Issue Date
2021-05
Language
English
Article Type
Article
Citation

AUTONOMOUS ROBOTS, v.45, no.4, pp.543 - 560

ISSN
0929-5593
DOI
10.1007/s10514-021-09986-5
URI
http://hdl.handle.net/10203/286532
Appears in Collection
ME-Journal Papers(저널논문)
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