Accuracy Improvement of Target Ship Position Estimation by a Shore Set-up Stereo Vision System
Başlık çevirisi mevcut değil.
- Tez No: 712048
- Danışmanlar: PROF. DR. SHIGEHIRO YAMAMOTO
- Tez Türü: Yüksek Lisans
- Konular: Deniz Bilimleri, Denizcilik, Marine Science, Marine
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2009
- Dil: İngilizce
- Üniversite: Kobe University
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Deniz Ulaştırma İşletme Mühendisliği Ana Bilim Dalı
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 86
Özet
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Özet (Çeviri)
Recently, safety ship navigation has become more important by the increment in the ship sizes and number of ships worldwide. Marine accidents and collisions are forming a great risk for environment and maritime sector, and this risk is gradually increasing by the increment in the number and size of the ships. The maritime authorities of countries want to have better control opportunity of ship traffic especially in strict areas as territorial waters and straights due to the risk of accidents and environmental pollution. For this reason the VTS's (Vessel Traffic Services) are developed and many people employed at VTS Centers to be able to control the traffic flow. Even more, worldwide maritime authority IMO (International Maritime Organization) constitutes new laws to achieve safer ship navigation and safer sea areas. However there is not enough preventive action taken and the frequency of maritime accidents is increasing. For safer navigation and prevention of marine accidents, especially collision, ship detection has a great importance. There are already some detection devices as RADAR/ARPA (Automatic Radar Plotting Aid) and AIS (Automatic Identification System) on board ships. AIS is mandatory only for the vessels which are greater than 500GT. These equipments are capable of detecting ships which are greater than 500 GT in the range of 20 nautical miles. However, the ships smaller than 500 GT and which are not carrying AIS device induce a high risk of collision. Even more in case of small ships, the radar cannot distinguish the ship and sea clutter and may cause false detection. Therefore, these devices may not be enough for collision-free navigation especially in domestic waters where small vessels like fishing boats exist. The accident inquiry reports show that the collisions are mostly caused by cargo ships and fishing vessels which are in the category we mentioned above. Therefore, this study has importance to detect ships in the range of about 3 nautical miles (about 5 km) -which is important to avoid from collision- which are small in size and not carrying AIS. The best way to do this is considered to be an artificial vision system that actually is carried out by human now. The inquiries show that most of the collisions take place in the range of 3 nautical miles from shore. One of the reasons for this is the fatigue of navigation officers. After a hectic work in port (loading and discharging), the navigation officer is already tired and has to carry out a navigation watch. Besides, near the port area the marine traffic is expected to be dense. In this case, the collision risk is increasing. By the application of such an assistant look-out system, the workload of seafarers will be reduced and safer navigation environment will be constituted.
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