Method suitable for collision early-warning detection of inland river overwater vessels

Abstract

The invention provides a method suitable for collision early-warning detection of inland river overwater vessels. The method comprises the following steps: 1, receiving vessel automatic identificationsystem (AIS) information, and acquiring vessel positions, an AIS equipment mounting position and vessel size data, wherein vessel sizes include lengths and widths; 2, acquiring rectangles of vessel collision detection; 3, projecting the collision detection rectangle coordinates of two vessels onto a separation axis by using the separation axis theorem; 4, calculating whether two vessel collisiondetection rectangles are overlapped or not; and 5, further judging whether the vessels have potential collision hazards or not in combination with the heading of the vessels. Compared with a vessel collision early-warning detection method in a traditional vessel traffic system (VTS), the method disclosed by the invention has the advantages that collision detection is performed on the basis of thereal contours of the vessels, so that the possible collision situation of the overwater vessels can be pre-judged more accurately, and the accuracy of vessel collision early warning in inland river maritime supervision is improved.

Description

technical field [0001] The invention relates to a method suitable for early warning and detection of ship collision on inland river water. Background technique [0002] Vessel Traffic System (VTS) is a system set up by the competent authority to implement traffic control on ships and provide consulting services to ensure ship traffic safety, improve ship traffic efficiency, and protect water environment. With the continuous development of the water transportation industry, the status and role of inland waterway shipping has gradually increased. According to statistics, my country's inland waterway transportation accounts for 48% of my country's waterway transportation, followed by coastal transportation, and ocean transportation is in the last place. It is imperative to strengthen the research on inland water traffic safety supervision and promote inland water traffic safety supervision. At present, most of the inland water traffic accidents are collision accidents, especia...

AI Technical Summary

Problems solved by technology

[0003] At present, most VTS systems are mainly applicable to the supervision of port areas. Due to the wide waters of coastal ports, ships entering and leaving ports follow the entry and exit channels designated by the maritime department, and the width of the channels is very wide, and the navigation distance between ships is relatively long. The collision detection of the ship is mainly based on the position, course and speed of the ship, and the early warning of the collision of the ship is carried out by calculating the CPA (closest intersection distance) and TCPA (the closest intersection time). In the calculation, the size of the ship itself is ignored in the wide waters of the port. Strictly speaking, the detection accuracy is not enough, and there is a certain error, which can be ignored in the wide waters of the port.

However, in inland waters, due to the characteristics of the navigable environment, it is impossible to divide the wide channel, which leads to the limited range of navigation of the ship, and the distance between the ships in the narrow channel is relatively short. First, when the set collision threshold is too large, a large number of false alarms will be generated due to the close distance between ships, resulting in false alarms; second, when the set collision threshold is too small, due to no Considering the size of the ship itself, some ships are already in a collision danger situation, but the system does not alarm, resulting in missed alarms

Therefore, collision detection based on CPA / TCPA cannot provide auxiliary support for maritime users to supervise the safety of ships on inland waters

Images