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http://dx.doi.org/10.5369/JSST.2017.26.3.199

The Underwater UUV Docking with 3D RF Signal Attenuation based Localization  

Kwak, Kyungmin (Department of Mechanical and Automotive Engineering, SEOULTECH)
Park, Daegil (Department of Mechanical Engineering, POSTECH)
Chung, Wan Kyun (Department of Mechanical Engineering, POSTECH)
Kim, Jinhyun (Department of Mechanical and Automotive Engineering, SEOULTECH)
Publication Information
Journal of Sensor Science and Technology / v.26, no.3, 2017 , pp. 199-203 More about this Journal
Abstract
In this paper, we developed an underwater localization system for underwater robot docking using the electromagnetic wave attenuation model. Electromagnetic waves are generally known to be impossible to use in water environment. However, according to the conclusions of the previous studies on the attenuation characteristics in underwater, the attenuation pattern is uniform and its model was accurately proposed and verified in 3-dimensional space via the omnidirectional antenna. In this paper, a docking structure and localization sensor system are developed for a widely used cone type docking mechanism. First, we fabricated electromagnetic wave range sensor transmit modules. And a mobile sensor node is equipped with unmanned underwater vehicle(UUV)s. The mobile node senses the four different signal strength (RSS: Received Signal Strength) from fixed nodes, and the obtained RSS data are transformed to each distance information using the 3-Dimensional EM wave attenuation model. Then, the relative localization between the docking area and underwater robot can be achieved according to optimization algorithm. Finally, experimental results show the feasibility of the proposed localization system for the docking induction by comparing the errors in the actual position of the mobile node and the theoretical position through the model.
Keywords
EM waves attenuation pattern; RSS; Underwater robot; Localization; Sensor network;
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