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JP-7854865-B2 - Ship monitoring equipment, ship monitoring method

JP7854865B2JP 7854865 B2JP7854865 B2JP 7854865B2JP-7854865-B2

Inventors

  • 鹿志村 亮介
  • 渡来 保奈美
  • 佐藤 茉莉

Assignees

  • 日本無線株式会社

Dates

Publication Date
20260507
Application Date
20220614

Claims (7)

  1. An acquisition unit that obtains an estimated position, which is an estimate of the future position of a ship that is anchored, An area calculation unit that determines a prohibited area based on objects present around the aforementioned vessel, A risk calculation unit that determines the degree of risk based on the positional relationship between the estimated position and the prohibited area, A ship monitoring device having an output unit that outputs the degree of the aforementioned risk.
  2. A distance calculation unit that determines the maximum distance a ship can travel from the anchoring point where it drops anchor, based on the length of the anchor chain, A determination unit that determines whether the estimated position exceeds the maximum movement range based on the maximum movement distance, It has, The output unit is, The ship monitoring device according to claim 1, wherein when the estimated position exceeds the maximum movement range, the display unit displays the position in a display manner corresponding to the degree of risk.
  3. The aforementioned object is a structure, The area calculation unit determines the prohibited area based on the distance from the structure, The ship monitoring device according to claim 1, wherein the risk calculation unit determines the degree of risk based on the positional relationship between the estimated position and the prohibited area.
  4. The aforementioned object is the other ship, The ship monitoring device according to claim 1, wherein the risk calculation unit determines the degree of risk based on the prohibited area determined based on the position of the other ship and the course of the other ship.
  5. The aforementioned object is located in an area shallower than the depth determined according to the underwater topography, The ship monitoring device according to claim 1, wherein the risk calculation unit determines the degree of risk based on the positional relationship between the estimated position and the prohibited area determined based on the shallow area.
  6. The ship monitoring device according to any one of claims 1 to 5, wherein the output unit displays the degree of risk for each target factor calculated by the risk calculation unit in different display areas on the display unit.
  7. The acquisition unit acquires the estimated position, which is the estimated future position of the anchored vessel. The area calculation unit determines the prohibited area based on objects present around the vessel, The risk calculation unit determines the degree of risk based on the positional relationship between the estimated location and the prohibited area. A ship monitoring method in which an output unit outputs the degree of the aforementioned risk.

Description

This invention relates to a ship monitoring device and a ship monitoring method. Ships may anchor in harbors or on the high seas. In such cases, depending on conditions such as rough weather, wind direction, and swells, there is a risk of anchor dragging. To understand this risk, there are monitoring devices that detect whether or not anchor is dragging (for example, Patent Document 1). Japanese Patent Application Publication No. 07-159530 This is a schematic block diagram showing the configuration of a ship monitoring system S using a ship monitoring device according to one embodiment of this invention.This figure shows an example of the content displayed on the display screen of the terminal device 50.This figure shows an example of a screen displayed in the display area R20.This is a flowchart explaining the operation of the ship monitoring system S0.This diagram illustrates the maximum travel distance and barriers.This diagram illustrates the process of determining restricted areas.This is a diagram explaining the safety zone.This diagram illustrates the motion of a ship while it is at anchor.This figure shows the relationship between the anchoring point AC and the trajectory of the ship's motion S0, based on the estimated latitude and longitude.This is a flowchart explaining the operation of the ship monitoring system S0. The following describes a ship monitoring device according to one embodiment of the present invention with reference to the drawings. Figure 1 is a schematic block diagram showing the configuration of a ship monitoring system S using a ship monitoring device according to one embodiment of the present invention. The ship monitoring system S includes a ship information collection device 10, an environmental information collection device 20, a ship monitoring device 30, an intermediate server 40, and a terminal device 50. The ship monitoring system S can be used to monitor multiple vessels navigating in ports and other areas from a monitoring station located on land. Furthermore, the ship monitoring system S can be installed on a vessel and used by the vessel to manage its own vessel. In this embodiment, a terminal device 50 is installed on the vessel to be monitored, and the crew of that vessel monitors its own vessel, as an example. Here, the vessels to be monitored may be vessels operated by a crew, or they may be vessels that can be operated without direct operation by a crew, such as autonomous vessels or self-driving vessels. When monitoring autonomous vessels, if there is a crew on board, the terminal device 50 may be installed on the autonomous vessel so that the crew can check the displayed content. If there is no crew on board, the terminal device 50 may be installed at a monitoring station so that a monitor can check the displayed content. The ship information collection device 10 collects information about the vessel being monitored. For example, the ship information collection device 10 collects information such as the position information (latitude, longitude, heading), ship speed, wind conditions (wind direction, wind speed), and hull size (overall length) of the vessel being monitored. Position information, ship speed, and hull size can be obtained from the AIS (Automatic Identification System) installed on the vessel being monitored. Wind conditions can be obtained from measurement results obtained from wind speed sensors, wind direction sensors, etc., installed on the vessel being monitored. The ship information collection device 10 is connected to the ship monitoring device 30 via wireless or wired communication and transmits various collected information to the ship monitoring device 30. The environmental information collection device 20 collects various types of information related to the sea area in which the ship is navigating. For example, the environmental information collection device 20 communicates with an external server device and receives various types of information from the server device. The information received includes weather and oceanographic information, water depth information, structural information, etc. Weather and oceanographic information includes information on weather and ocean conditions, such as weather, wave conditions (wave height, wave direction, period, etc.), and tidal levels. Depth information represents the water depth according to the seabed topography. Depth information is obtained from sensors installed on the vessel (e.g., depth measuring instruments, sonar). In addition to using sensors, the depth at the vessel's current position may also be obtained from data on electronic nautical charts. The data on electronic nautical charts may be stored in advance in the environmental information acquisition device or obtained from an external source. Structural information refers to information that describes the location and shape of structures such as quays and bridge piers. Structural information can be obtained from data on nautical