Journal of Dalian Maritime University >
2018 , Vol. 44 >Issue 4: 8 - 14
DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2018.04.002
Anchor monitoring and alarming method for single anchored ship based on AIS information
Received date: 2018-03-22
Revised date: 2018-07-01
Online published: 2018-07-01
According to the motion law of single anchored ship under different wind and current conditions, the corresponding monitoring and early warning method for single anchored ship was proposed based on AIS information. For ships with low wind and current, firstly, an improved density based spatial clustering of applications with noise method (DBSCAN) based on similarity curve with adjustable Eps neighborhood threshold was used to denoise the original mooring ship position information; then, the circular curve fitting of de-noised AIS data was conducted to find out the center of the trajectory as anchor point; finally, the changes of position and ship speed were taken as the judgment criterions of anchoring to judge whether the ship is anchoring and alarm. For ships with large wind and current, the position of the two limit points of the “infinity” motion of the anchored ship was determined firstly; then, anchor points were determined based on the above two limit points; finally, anchor analysis and judgement were made according to the distance change between ship position and anchor position, as well as the ship speed variation. Examples and simulation analysis prove the effectiveness of proposed method.
XIAO Jin-li , FU Yao-fang , CHENG Tao . Anchor monitoring and alarming method for single anchored ship based on AIS information[J]. Journal of Dalian Maritime University, 2018 , 44(4) : 8 -14 . DOI: 10.16411/j.cnki.issn1006-7736.2018.04.002
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