WO2024053524A1 - Dispositif d'aide à la navigation et procédé d'aide à la navigation - Google Patents

Dispositif d'aide à la navigation et procédé d'aide à la navigation Download PDF

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Publication number
WO2024053524A1
WO2024053524A1 PCT/JP2023/031640 JP2023031640W WO2024053524A1 WO 2024053524 A1 WO2024053524 A1 WO 2024053524A1 JP 2023031640 W JP2023031640 W JP 2023031640W WO 2024053524 A1 WO2024053524 A1 WO 2024053524A1
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WIPO (PCT)
Prior art keywords
quay
bow
ship
predicted
stern
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PCT/JP2023/031640
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English (en)
Japanese (ja)
Inventor
一喜 辻本
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古野電気株式会社
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Publication of WO2024053524A1 publication Critical patent/WO2024053524A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B43/00—Improving safety of vessels, e.g. damage control, not otherwise provided for
    • B63B43/18—Improving safety of vessels, e.g. damage control, not otherwise provided for preventing collision or grounding; reducing collision damage
    • B63B43/20—Feelers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B49/00—Arrangements of nautical instruments or navigational aids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B79/00—Monitoring properties or operating parameters of vessels in operation
    • B63B79/10—Monitoring properties or operating parameters of vessels in operation using sensors, e.g. pressure sensors, strain gauges or accelerometers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B79/00—Monitoring properties or operating parameters of vessels in operation
    • B63B79/40—Monitoring properties or operating parameters of vessels in operation for controlling the operation of vessels, e.g. monitoring their speed, routing or maintenance schedules

Definitions

  • the present invention relates to navigation support technology for ships, particularly to navigation support technology during docking and departure.
  • Patent Document 1 describes a method and system for supporting the arrival and departure of a ship from a berth.
  • Patent Document 1 a target berthing state of a ship is shown in a simulated manner.
  • Patent Document 1 With the conventional technology as shown in Patent Document 1, it is difficult to provide highly accurate information on the state of the ship until it docks.
  • an object of the present invention is to provide highly accurate information indicating the state of a ship until it berths.
  • the navigation support device of the present invention includes an own ship state detection sensor and a predicted track calculation unit.
  • the own ship state detection sensor detects own ship position and own ship acceleration.
  • the predicted track calculation unit calculates a predicted track based on the own ship position and own ship acceleration.
  • the predicted track is calculated based on the speed and acceleration of the own ship. This improves the accuracy of calculating the predicted track and provides highly accurate information indicating the state of the ship until it docks.
  • FIG. 1 is a diagram showing an example of functional blocks of a navigation support device according to an embodiment of the present invention.
  • FIG. 2(A) and FIG. 2(B) are diagrams showing an example of the shape of a ship in which a navigation support device is mounted.
  • FIG. 3(A), FIG. 3(B), and FIG. 3(C) are diagrams showing an example of a schematic process flow executed by the calculation unit.
  • FIG. 4 is a diagram showing an example of a display screen.
  • FIG. 5(A) shows an example of the bow side video window
  • FIG. 5(B) shows an example of the stern side video window.
  • FIG. 6 is a diagram showing an example of a bird's eye view window.
  • FIG. 7 is a diagram showing an example of a numerical data display window.
  • FIG. 1 is a diagram showing an example of functional blocks of a navigation support device according to an embodiment of the present invention.
  • FIG. 2(A) and FIG. 2(B) are diagrams showing an example of the
  • FIG. 8 is a diagram showing an example of a ship speed display window.
  • FIG. 9 is a diagram showing an example of the arrival prediction information display window.
  • FIG. 10 is a diagram showing an example of a quay arrival prediction display window.
  • FIG. 11 is a diagram showing another example of the bow side video window.
  • FIG. 12 is a diagram showing another example of the bird's-eye view window.
  • FIG. 13 is a diagram showing another example of the ship speed display window.
  • 14(A) and 14(B) are flowcharts illustrating an example of a method for displaying a predicted position in the navigation support method according to the present embodiment.
  • FIG. 15 is a functional block diagram of the calculation unit of the navigation support device according to the embodiment of the present invention.
  • FIG. 15 is a functional block diagram of the calculation unit of the navigation support device according to the embodiment of the present invention.
  • FIG. 16 is a functional block diagram of the calculation unit of the navigation support device according to the embodiment of the present invention.
  • FIGS. 17(A) and 17(B) are functional block diagrams of the calculation unit of the navigation support device according to the embodiment of the present invention.
  • FIG. 18 is a functional block diagram of the calculation unit of the navigation support device according to the embodiment of the present invention.
  • FIGS. 19(A) and 19(B) are functional block diagrams of the calculation unit of the navigation support device according to the embodiment of the present invention.
  • FIG. 20 is a diagram for explaining the definition and calculation concept of the quay direction velocity and quay direction distance.
  • FIGS. 21(A) and 21(B) are diagrams for explaining the definition of the declination angle and the concept of calculating the speed in the direction of the quay.
  • 22(A) and 22(B) are flowcharts illustrating an example of a method for calculating the quay direction distance and quay direction acceleration in the navigation support method according to the present embodiment.
  • 23(A) and 23(B) are flowcharts illustrating an example of a method for calculating a predicted speed and a predicted declination upon arrival at a quay in the navigation support method according to the present embodiment.
  • FIG. 1 is a diagram showing an example of functional blocks of a navigation support device according to an embodiment of the present invention.
  • 2(A) and 2(B) are diagrams showing an example of the shape of a ship in which a navigational support device is installed, with FIG. 2(A) being a plan view and FIG. 2(B) being a side view. This is a diagram.
  • the navigation support technology of this embodiment is a navigation support technology when a ship docks or leaves the berth, and is particularly used when docking.
  • the berthed state refers to the state in which a ship enters a port, decelerates, etc. until the bow or stern approaches the quay to a certain distance, and then the ship's berthing side reaches the quay. .
  • the navigation support device 10 includes a display 20, a ship state detection sensor 31, a quay detection sensor 32, a camera 41, a camera 42, a calculation section 50, and an image composition section 60. Note that the number of cameras is not limited to two.
  • the calculation unit 50 is composed of a navigation support program that executes various navigation support processes to be described later, a storage medium that stores this navigation support program, and a calculation processing device that executes the navigation support program.
  • the image synthesis section 60 is configured by an electronic circuit.
  • the display device 20 is realized by, for example, a liquid crystal panel.
  • the own ship state detection sensor 31 and the quay detection sensor 32 are connected to the calculation unit 50.
  • the camera 41, camera 42, and calculation section 50 are connected to an image composition section 60.
  • the image synthesis section 60 is connected to the display 20.
  • the ship 90 includes a bow 91, a stern 92, a starboard side 93, a port side 94, and a bridge 99.
  • the ship 90 is, for example, a large ship such as a ferry or a tanker, and has a total length of 100 meters, a width of several tens of meters, and a height of 10 meters or more. Although the ship 90 may be a smaller ship, the configuration of this embodiment works effectively as long as it is a large ship.
  • the own ship state detection sensor 31, the quay detection sensor 32, the camera 41, and the camera 42 are installed near the bridge 99, for example.
  • the installation position of the camera 42 is not limited to this as long as it satisfies each condition described below.
  • the calculation section 50, the image composition section 60, and the display device 20 are installed, for example, in the wheelhouse of the bridge 99.
  • the display device 20 may be one that projects an image onto a window of the wheelhouse.
  • the own ship state detection sensor 31 detects own ship motion state data including own ship position, own ship speed, own ship acceleration, turning angular velocity, heading, and own ship attitude angle. Own ship state detection sensor 31 outputs own ship motion state data to calculation unit 50 .
  • the own ship state detection sensor 31 is configured by, for example, a positioning sensor using a positioning signal such as GPS, an inertial sensor, and an integrated sensor that integrates the positioning sensor and the inertial sensor. Note that the specific method for detecting the motion state of the own ship using the own ship state detection sensor 31 is the same as the known method for detecting the motion state of the own ship using the positioning sensor, inertial sensor, and integrated sensor, and the explanation will be omitted. do.
  • the own ship state detection sensor 31 detects the own ship position, own ship speed (ship speed relative to the ground), own ship acceleration, and own ship attitude angle at the installation position. Own ship position is detected in an absolute coordinate system (for example, GNSS coordinate system, geocentric three-dimensional orthogonal coordinate system), and own ship speed, own ship acceleration, and own ship attitude angle are detected in an absolute coordinate system or ship body coordinate system. be done.
  • an absolute coordinate system for example, GNSS coordinate system, geocentric three-dimensional orthogonal coordinate system
  • own ship speed, own ship acceleration, and own ship attitude angle are detected in an absolute coordinate system or ship body coordinate system. be done.
  • the own ship state detection sensor 31 detects the turning angular velocity and heading of the ship 90.
  • the turning angular velocity is detected in the hull coordinate system, and the heading is detected in the absolute coordinate system.
  • the own ship state detection sensor 31 outputs the motion state of the own ship (own ship position, own ship speed, own ship acceleration, turning angular velocity, heading, and own ship attitude angle) to the calculation unit 50. Note that the own ship state detection sensor 31 does not necessarily need to output all the data indicating the motion state of the own ship to the calculation unit 50, and only needs to output the minimum amount of data necessary for the information calculated by the calculation unit 50. .
  • the quay detection sensor 32 is configured by, for example, an optical ranging device, specifically, a LiDAR (Light Detection and Ranging).
  • the berth detection sensor 32 is arranged on the ship 90 so that the distance measurement range is a scene outside the ship 90 on the side of the ship 90 that takes off from and arrives at the berth. At this time, it is preferable that the quay detection sensor 32 also include the external scene on the bow 91 side and the stern 92 side of the ship 90 in its ranging range.
  • the quay detection sensor 32 generates quay detection data including a plurality of feature points (for example, a point group detected by LiDAR) obtained from the ranging results and their positions (coordinate system of the quay detection sensor), and sends the quay detection data to the calculation unit 50. Output.
  • a plurality of feature points for example, a point group detected by LiDAR
  • LiDAR LiDAR
  • the camera 41 is installed on the ship 90 so as to image the scene on the bow 91 side of the ship 90 when the ship 90 takes off from the berth. That is, the camera 41 is a bow side imaging camera. The camera 41 outputs image data (image data of the bow side on the port side and the bow side) to the image composition unit 60.
  • the camera 42 is installed on the ship 90 so as to image the scene on the stern 92 side on the side where the ship 90 takes off from and docks. That is, the camera 42 is a stern side imaging camera.
  • the camera 42 outputs imaging data (imaging data on the port side and the stern side) to the image composition unit 60.
  • the calculation unit 50 generates navigation support data based on the motion state data of the own ship from the own ship state detection sensor 31 and the quay detection data from the quay detection sensor 32 .
  • FIG. 3(A), FIG. 3(B), and FIG. 3(C) are diagrams showing an example of a schematic process flow executed by the calculation unit.
  • FIG. 3(A), FIG. 3(B), and FIG. 3(C) a schematic process of the calculation unit 50 will be described.
  • the calculation unit 50 stores in advance the relationship among the absolute coordinate system, the hull coordinate system, and the coordinate system of the optical ranging device, and stores a coordinate transformation matrix between each. When coordinate transformation is necessary in calculating each piece of information to be described later, the calculation unit 50 performs the calculation using this coordinate transformation.
  • the calculation unit 50 detects a quay line from the quay detection data, and detects the position coordinates of the quay line and the quay line orientation.
  • the calculation unit 50 calculates bow speed, bow acceleration, stern speed, and stern acceleration based on own ship speed, own ship acceleration, and turning angular velocity in the own ship's motion state data.
  • the calculation unit 50 stores in advance the positional relationship between the installation position of the own ship state detection sensor 31 and the bow position P91 or the bow position P93h on the berth side and the stern position P93t on the berth side.
  • the calculation unit 50 calculates bow speed, bow acceleration, stern speed, and stern acceleration based on this positional relationship.
  • the calculation unit 50 calculates the declination angle between the ship 90 and the quay line based on the ship's heading and the quay line orientation.
  • the declination angle is the angle formed by the quay line and an axis extending in the direction connecting the bow 91 and stern 92 of the vessel 90 (in the bow-stern direction).
  • the calculation unit 50 calculates the bow berth direction velocity and the bow berth direction acceleration based on the bow speed, bow acceleration, and yaw angle.
  • the bow berth direction speed is the speed (horizontal speed) in the direction of a perpendicular line descending from the bow position P91 toward the berth line (berth line on the berth side).
  • the bow berth direction speed is the speed toward the shortest distance from the bow position P91 to the bow position P91 on the berth line.
  • the bow berth direction acceleration is the acceleration (horizontal acceleration) in the direction of a perpendicular line extending from the bow position P91 toward the berth line.
  • the bow berth direction acceleration is the acceleration directed from the bow position P91 to the point on the quay line that is the shortest distance from the bow position P91.
  • the calculation unit 50 calculates the stern quay direction speed and the stern quay direction acceleration based on the stern speed, the stern acceleration, and the yaw angle.
  • the stern quay direction speed is the velocity (horizontal velocity) in the direction of a perpendicular line drawn from the stern position P93t toward the quay line (the quay line on the side of the berth).
  • the stern quay direction speed is the velocity toward the shortest distance from the stern position P93t to the stern position P93t on the quay line.
  • the stern quay direction acceleration is the acceleration (horizontal acceleration) in the direction of a perpendicular line extending from the stern position P93t toward the quay line.
  • the acceleration toward the stern quay is the acceleration directed toward the shortest distance from the stern position P93t to the stern position P93t on the quay line.
  • the calculation unit 50 calculates the bow speed, the stern position, based on the own ship speed and own ship acceleration, and the relationship between the sensor position, the bow position, and the stern position. The speed is calculated, and based on the bow speed, stern speed, and yaw angle, the bow berth direction speed, bow berth acceleration, stern berth direction speed, and stern berth direction acceleration are calculated.
  • the calculation unit 50 calculates the speed in the direction of the quay and the acceleration in the direction of the quay at the position of the own ship state detection sensor 31 based on the own ship speed, the own ship acceleration, and the yaw angle. Based on the quay direction speed and quay direction acceleration, and the relationship between the sensor position, bow position, and stern position, the bow quay direction velocity, bow quay acceleration, stern quay direction velocity, and stern quay direction acceleration are calculated. You can also do that.
  • the calculation unit 50 calculates the bow position P91 (position coordinates) based on the own ship position, and calculates the bow side quay distance based on the bow position P91 and the position coordinates of the quay line.
  • the bow side berth distance is the distance between the bow position P91 and the foot of a perpendicular line drawn down from the bow position P91 toward the pier line (the berth line on the berth side).
  • the bow side quay distance is the distance between the bow position P91 and the point on the quay line that is the shortest distance from the bow position P91.
  • the calculation unit 50 calculates the stern position P93t (position coordinates) based on the own ship position, and calculates the stern quay distance based on the stern position P93t and the position coordinates of the quay line.
  • the stern quay distance is the distance between the stern position P93t and the foot of a perpendicular line drawn down from the stern position P93t toward the quay line (the quay line on the berth side).
  • the stern quay distance is the distance between the point on the quay line that is the shortest distance from the stern position P93t and the stern position P93t.
  • the calculation unit 50 calculates the predicted bow arrival time or predicted bow arrival speed based on the bow berth direction speed, the bow berth direction acceleration, and the bow side berth distance.
  • the predicted bow arrival time is the predicted time from the current moment until the bow position P91 reaches the quay line.
  • the predicted bow arrival speed is the speed when the bow position P91 reaches the quay line.
  • the predicted bow arrival speed is the speed in the direction perpendicular to the quay line.
  • the calculation unit 50 calculates the predicted stern arrival time or the predicted stern arrival speed based on the stern quay direction velocity, the stern quay direction acceleration, and the stern side quay distance.
  • the predicted stern arrival time is the predicted time from the current moment until the stern position P93t reaches the quay line.
  • the predicted stern arrival speed is the speed when the stern position P93t reaches the quay line.
  • the predicted speed at the stern is the speed in the direction perpendicular to the quay line.
  • the calculation unit 50 calculates the predicted position at equal time intervals based on the own ship position, the bow berth direction velocity, the bow berth direction acceleration, the stern berth direction velocity, and the stern berth direction acceleration.
  • the equal time interval predicted position is the position of the berth side predicted at the current time interval.
  • the predicted position at equal time intervals is expressed, for example, by a straight line (line segment) simulating the berth as shown in FIGS. 3 and 4. It may be a figure using straight lines or curves.
  • the calculation unit 50 generates bow collision prediction information based on the predicted bow arrival time or the predicted bow arrival speed.
  • the bow collision prediction information is information indicating that the bow position P91 will reach the quay at a predetermined speed or higher. In other words, a collision with a quay is included in arriving at a quay, and among arriving at a quay, a case where the vehicle reaches the quay at a predetermined speed or higher is considered a collision.
  • the calculation unit 50 generates stern collision prediction information based on the predicted stern arrival time or the stern arrival speed.
  • the stern collision prediction information is information indicating that the stern position P93t will reach the quay at a predetermined speed or higher.
  • the calculation unit 50 calculates the heading at the time of arrival based on the predicted bow arrival time, predicted stern arrival time, bow berth direction speed, bow berth direction acceleration, stern berth direction speed, and stern berth direction acceleration.
  • the heading heading upon arrival is the heading heading when the bow position P91 or the stern position P93t reaches the quay (quay line).
  • the calculation unit 50 calculates the yaw angle at the time of arrival based on the heading direction at the time of arrival and the direction of the quay line.
  • the arrival angle is the angle formed by the axis extending in the bow-stern direction of the vessel 90 and the quay line when the bow position P91 or the stern position P93t reaches the quay (quay line).
  • the predicted arrival time is calculated based on the quay direction velocity, quay direction acceleration, and quay distance.
  • the quay distance is calculated based on the own ship position and the quay ship.
  • the calculation unit 50 outputs the calculated or generated information to the image composition unit 60. At this time, the calculation unit 50 may output at least the information necessary for the image selected by an operator such as a captain or a navigator.
  • the image synthesis unit 60 combines image data from the camera 41 (image data from the bow side on the port and takeoff sides), image data from the camera 42 (image data from the stern side on the port and takeoff sides), and various data from the calculation unit 50. Based on this, display image data for navigation support is generated.
  • the image synthesis unit 60 generates display image data at a preset update cycle and outputs it to the display 20.
  • the display device 20 displays display image data on a display screen.
  • the display device 20 displays on the display screen the display image data that is sequentially updated and input.
  • FIG. 4 is a diagram showing an example of a display screen.
  • the display screen 200 includes a bow side video window 211, a stern side video window 212, a bird's eye view window 22, a numerical data display window 23, a ship speed display window 24, an azimuth relationship display window 25, and a predicted arrival information display. It has a window 26 and a warning display window 27.
  • the bow side video window 211 and the stern side video window 212 are arranged side by side in the upper row of the display screen 200. At this time, if the berth is on the starboard side 93, the bow side video window 211 is preferably placed on the left side, and the stern side video window 212 is preferably placed on the right side. Thereby, the positional relationship between the bow side video window 211 and the stern side video window 212 matches the actual positional relationship between the bow 91 and the stern 92 of the ship 90. Therefore, the navigation support device 10 can provide the operator with a display that matches the actual view from the ship 90 (bridge 99).
  • the bird's-eye view window 22, the numerical data display window 23, the ship speed display window 24, the direction relationship display window 25, the predicted arrival information display window 26, and the warning display window 27 are arranged in line as appropriate in the lower part of the display screen 200. .
  • the bird's-eye view window 22 is preferably displayed larger than other windows.
  • the bird's-eye view window 22 displays the current position, predicted track, and past track of the ship 90, which will be described in detail later. Therefore, by displaying the bird's-eye view window 22 in a large size, the operator can easily and clearly understand the behavior of the vessel 90.
  • the image synthesis unit 60 stores in advance the relationship among the absolute coordinate system, the hull coordinate system, the coordinate system of the image of the camera 41, and the coordinate system of the image of the camera 42, and stores a coordinate transformation matrix between each. . If coordinate transformation is necessary for video generation of the bow-side video window 211 and the stern-side video window 212, the image synthesis unit 60 performs calculation using this coordinate transformation.
  • FIG. 5(A) shows an example of the bow side video window
  • FIG. 5(B) shows an example of the stern side video window.
  • the imaging data (video) of the camera 41 is displayed in the bow side video window 211, and a ship video Psh, a sea surface video Psea, and a quay video Pqw are displayed. Further, in the bow side video window 211, a simplified image 2119 indicating the video position is displayed.
  • the simplified image 2119 consists of a simplified plan view of the ship 90 and a mark indicating the position of the image, and indicates that the image is on the bow 91 side of the berth side.
  • the bow side video window 211 displays a quay line 2111, a berthing reference point mark Mn, a bow position mark Mh, a bridge position mark Mb, a bow foot position mark Mqh, and a berthing reference point perpendicular Lnl.
  • the quay line 2111 is a straight line, and is generated based on the coordinates of the quay line detected by the above-described calculation unit 50.
  • the berthing reference point mark Mn is generated based on the berthing reference point (for example, the position of the N flag) in the absolute coordinate system.
  • the bow position mark Mh is generated based on the position coordinates of the bow position P91.
  • the bridge position mark Mb is generated based on the position coordinates of the bridge 99. More specifically, the bridge position mark Mb is generated based on the end position coordinates of the ship's bridge 99 on the berth side.
  • the bow side foot position mark Mqh is generated based on the foot position coordinates of a perpendicular line drawn from the bow position P91 to the quay line 2111.
  • the berthing reference point perpendicular Lnl is generated as a straight line extending from the berthing reference point to the seaward direction, perpendicular to the quay line 2111.
  • the bow side quay distance 2113 is displayed in the bow side video window 211.
  • the bow side berth distance 2113 is based on the bow side berth distance calculated by the calculation unit 50, and is displayed as a numerical value.
  • the bow side quay wall distance 2113 is displayed near the bow side foot position mark Mqh.
  • a plurality of predicted positions 2112 (t1) to 2112 (t5) are displayed in the bow side video window 211.
  • the plurality of predicted positions 2112(t1) to 2112(t5) are straight lines simulating the berthing and departing sides, and are generated based on the plurality of predicted positions calculated at equal time intervals by the calculation unit 50.
  • the mode which generated and displayed five predicted positions was shown, the number is not limited to this as long as it is plural.
  • the predicted position 2112 (t1) is a straight line that indicates the predicted position from the current time to a future time t1
  • the predicted position 2112 (t2) is a straight line that indicates the predicted position at the next time t2 after time t1. It is.
  • the predicted position 2112 (t3) is a straight line indicating the predicted position at time t3 following time t2
  • the predicted position 2112 (t4) is a straight line indicating the predicted position at time t4 following time t3.
  • the predicted position 2112 (t5) is a straight line indicating the predicted position at time t5 following time t4.
  • the time difference between time t1 and time t2, the time difference between time t2 and time t3, the time difference between time t3 and time t4, and the time difference between time t4 and time t5 are the same.
  • the plurality of times t1-t5 are at equal time intervals.
  • the operator can confirm the predicted position of the bow side of the ship 90 during the process of docking at the quay by superimposing it on the actual video.
  • the stern video window 212 displays the imaging data (video) of the camera 42, and displays the ship video Psh, the sea surface video Psea, and the quay video Pqw. Furthermore, a simplified image 2129 indicating the video position is displayed in the stern video window 212.
  • the simplified image 2129 consists of a simplified plan view of the ship 90 and a mark indicating the position of the image, and indicates that the image is on the stern 92 side of the berth side.
  • the stern video window 212 displays a quay line 2111 and a stern foot position mark Mqt. Note that when the berthing reference point is closer to the stern 92 than the bridge 99, the berthing reference point mark Mn and the berthing reference point perpendicular Lnl are displayed in the stern video window 212. Furthermore, when the video includes the stern position P93t, a stern position mark similar to the bow position mark Mh is displayed in the stern video window 212.
  • the quay line 2111 is a straight line, and is generated based on the coordinates of the quay line detected by the above-mentioned calculation unit 50.
  • the stern foot position mark Mqt is generated based on the foot position coordinates of a perpendicular line drawn from the stern position P93t to the quay line 2111.
  • a stern quay distance 2123 is displayed in the stern video window 212.
  • the stern quay distance 2123 is based on the stern quay distance calculated by the calculation unit 50, and is displayed as a numerical value.
  • the stern quay distance 2123 is displayed near the stern foot position mark Mqt.
  • the stern side video window 212 displays a plurality of predicted positions 2112(t1) to 2112(t5).
  • the operator can confirm the predicted position of the stern side of the ship 90 during the process of docking at the quay by superimposing it on the actual video.
  • the operator can check the predicted position of the bow side and stern side berth side of the vessel 90 in the process of berthing to the quay. You can superimpose it on the video and check it at the same time.
  • the plurality of predicted positions 2112(t1) to 2112(t5) are calculated based on the bow speed, bow acceleration, stern speed, and stern acceleration. Therefore, the plurality of predicted positions 2112(t1) to 2112(t5) are calculated taking into account not only the speed but also the acceleration. Thereby, the navigation support device 10 can predict the position at the time of docking with higher accuracy, and can provide it to the operator as navigation support information.
  • the plurality of predicted positions 2112(t1) to 2112(t5) are calculated based on the bow berth direction velocity, bow berth direction acceleration, stern berth direction velocity, and stern berth direction acceleration.
  • the navigation support device 10 can more accurately calculate the state in which the plurality of predicted positions 2112 (t1) to 2112 (t5) approach the quay. Therefore, the navigation support device 10 can predict the position at the time of docking with higher accuracy, and can provide it to the operator as navigation support information.
  • the plurality of predicted positions 2112(t1) to 2112(t5) are arranged at equal time intervals. As a result, the intervals between the lines indicating the plurality of predicted positions 2112(t1) to 2112(t5) change depending on the acceleration (change in speed).
  • the navigation support device 10 can provide the operator with information on how the berthing side will behave under the influence of acceleration when the vessel is docked.
  • the navigation support system 10 makes it easy for the operator to understand how the berthing side will behave when berthed, even on a large ship. can be provided as follows.
  • a mode is shown in which the bow side video window 211 and the stern side video window 212 are displayed simultaneously.
  • either the bow side video window 211 or the stern side video window 212 may be selectively displayed.
  • FIG. 6 is a diagram showing an example of a bird's eye view window.
  • the bird's-eye view window 22 represents a bird's-eye view (plan view) of the docked state of the ship 90 using images such as marks.
  • the bird's eye view window 22 includes a quay line 2111, a berthing reference point mark Mn, a bow position mark Mh, a bridge position mark Mb, a stern position mark Mt, a bow foot position mark Mqh, a stern foot position mark Mqt, and a berthing reference point perpendicular Lnl. is displayed.
  • the quay line 2111 is a straight line similar to the bow side video window 211 and the stern side video window 212, has a shape that extends vertically of the bird's eye view window 22, and is arranged near the right end of the bird's eye view window 22.
  • the quay line 2111 is preferably arranged at the right end when the berthing side of the vessel 90 is the starboard side 93, and is preferably arranged at the left end when the berthing side of the vessel 90 is the port side 94.
  • the berthing reference point mark Mn, the bow position mark Mh, the bridge position mark Mb, and the bow foot position mark Mqh are the same as those in the bow side video window 211 and the stern side video window 212.
  • the stern position mark Mt is generated based on the position coordinates of the stern position P93t on the berthing side.
  • the bow side foot position mark Mqh is generated based on the foot position coordinates of a perpendicular line drawn from the stern position P93t to the quay line 2111.
  • the bird's-eye view window 22 displays a bow side berth distance 2113 and a stern side berth distance 2123.
  • the bow side berth distance 2113 is based on the bow side berth distance calculated by the calculation unit 50, and is displayed as a numerical value.
  • the stern quay distance 2123 is based on the stern quay distance calculated by the calculation unit 50, and is displayed as a numerical value.
  • the bird's-eye view window 22 displays the bridge quay reference point distance 2124.
  • the bridge quay reference point distance 2124 is the distance between the bridge position in a direction parallel to the quay line 2111 and the quay reference point (the position of the berthing reference point mark Mn), and is displayed as a numerical value.
  • the bird's eye view window 22 displays a current state mark 220, a plurality of predicted track marks 2212 (t1) to 2212 (t4), and a plurality of past track marks 220tp.
  • the current state mark 220 is a simplified bird's-eye view of the ship 90, and the bow position mark Mh, the bridge position mark Mb, and the stern position mark Mt are arranged on the current state mark 220.
  • the current status mark 220 is displayed based on the ship's own position (bow position, stern position) and heading.
  • the plurality of predicted track marks 2212 (t1) to 2212 (t4) are marks that are simplified representations of the berthing side, bow, and part of the stern. Note that the plurality of predicted track marks 2212(t1) to 2212(t4) only need to include at least a straight line that simply represents the berthing side.
  • the plurality of predicted track marks 2212(t1)-2212(t4) are based on the plurality of predicted positions calculated at equal time intervals in the calculation unit 50, similarly to the plurality of predicted positions 2112(t1)-2112(t5). are generated respectively.
  • a plurality of past track marks 220tp are displayed based on the past ship position (bow position, stern position) and bow direction.
  • the navigation support device 10 By generating and displaying the plurality of predicted track marks 2212 (t1) to 2212 (t4) in the same manner as the plurality of predicted positions 2112 (t1) to 2112 (t5), the navigation support device 10 displays the bird's eye view window. 22, it is possible to provide highly accurate information on how the berth will behave when docking, and to provide the information in an easy-to-understand manner for the operator.
  • FIG. 7 is a diagram showing an example of a numerical data display window.
  • the numerical data display window 23 includes a bow side quay distance display window 231, a bridge quay reference point distance display window 232, a stern quay distance display window 233, and a declination display window 234.
  • the bow side berth distance display window 231 the bow side berth distance 2311 is displayed numerically.
  • a numerical value of the bridge quay reference point distance 2321 and a mark 2322 indicating the positional relationship between the ship 90 and the berthing reference point perpendicular Lnl are displayed.
  • the stern quay distance display window 233 displays a stern quay distance 2331 as a numerical value.
  • the declination angle 2341 of the ship 90 with respect to the quay line 2111 is displayed as a numerical value, and the relationship 2342 between the quay line 2111 and the ship's heading is displayed as a mark.
  • the navigation support device 10 can provide the operator with numerical values about the berthed state of the ship 90, and can also provide the operator with the relationship between the ship and the quay using marks.
  • FIG. 8 is a diagram showing an example of a ship speed display window.
  • a bow model mark 2491 and a stern model mark 2492 are displayed on the ship speed display window 24.
  • the bow model mark 2491 and the stern model mark 2492 are arranged side by side in the vertical direction of the ship speed display window 24.
  • a bow berth direction speed 241 is displayed as a numerical value
  • a stern berth direction speed 242 is displayed as a numeric value
  • a bow and stern direction speed 243 is displayed as a numeric value
  • a direction mark 2420 for the speed in the stern quay direction and a direction mark 2430 for the speed in the bow and aft direction are displayed.
  • the bow berth direction speed 241 and the direction mark 2410 for the bow berth direction speed are arranged near the bow schematic mark 2491.
  • the stern quay direction speed 242 and the direction mark 2420 for the stern quay direction speed are arranged near the stern schematic mark 2492 .
  • the bow and stern speed 243 and the direction mark 2430 for the bow and stern speed are arranged between the bow schematic mark 2491 and the stern schematic mark 2492 in the vertical direction of the boat speed display window 24 .
  • the numerical value of the bow berth direction speed 241 and the direction mark 2410 of the bow berth direction speed are displayed based on the bow berth direction speed calculated by the calculation unit 50.
  • the direction mark 2410 of the bow berth direction speed is displayed by an arrow mark pointing to the moving direction of the bow position P91.
  • the numerical value of the stern quay direction speed 242 and the direction mark 2420 for the stern quay direction speed are displayed based on the stern quay direction speed calculated by the calculation unit 50.
  • the direction mark 2420 of the stern quay direction speed is displayed by an arrow mark pointing to the moving direction of the stern position P93t.
  • the numerical value of the bow/stern speed 243 and the direction mark 2430 of the bow/stern speed are calculated by the calculation unit 50 based on the own ship speed and the heading, and are displayed based on the calculation results.
  • the direction mark 2430 for the fore-and-aft direction speed is displayed by an arrow mark pointing to the moving direction of the vessel 90 in the fore-and-aft direction.
  • the navigation support device 10 can provide the berthing behavior of the bow 91 and the berthing behavior of the stern 92 using numerical values and arrow marks in a way that is easy for the operator to understand.
  • the orientation relationship display window 25 includes an orientation display window 251 and a turning angular velocity display window 252.
  • the own ship direction is displayed numerically.
  • the turning angular velocity display window 252 displays the turning angular velocity numerically.
  • FIG. 9 is a diagram showing an example of the arrival prediction information display window.
  • a bow model mark 2691 and a stern model mark 2692 are displayed in the arrival prediction information display window 26.
  • the bow model mark 2691 and the stern model mark 2692 are arranged side by side in the vertical direction of the arrival prediction information display window 26.
  • the bow model mark 2691 and the stern model mark 2692 are displayed in the shape of half of the berth side of the ship 90.
  • the bow arrival speed 261 is displayed as a numerical value
  • the stern arrival speed 262 is displayed as a numerical value
  • the arrival angle 263 is displayed as a numerical value
  • the bow arrival direction 2610 is displayed as an arrow.
  • the stern arrival direction 2620 is displayed as an arrow
  • a mark 2630 that schematically represents the declination at the time of arrival is displayed.
  • the bow arrival speed 261 and the bow arrival direction 2610 are arranged near the bow schematic mark 2691.
  • the stern arrival speed 262 and the stern arrival direction 2620 are arranged near the stern schematic mark 2692 .
  • Arrival declination 263 and a mark 2630 that schematically represents the arrival declination are arranged between the bow schematic mark 2691 and the stern schematic mark 2692 in the vertical direction of the arrival prediction information display window 26.
  • the numerical value of the bow arrival speed 261 and the arrow of the bow arrival direction 2610 are displayed based on the predicted bow arrival speed and bow collision prediction information calculated by the calculation unit 50.
  • the numerical value of the stern arrival speed 262 and the arrow of the stern arrival direction 2620 are displayed based on the predicted speed at the stern and the stern collision prediction information calculated by the calculation unit 50.
  • the values of the speed at bow arrival 261 and the speed at stern 262 display the predicted speed at the time of arrival of the bow position P91 or the stern position P93t, whichever reaches the quay first. If there is no contact, "no contact (no arrival)" is displayed, as shown in FIG. 9, for example. Further, the arrow for the bow arrival direction 2610 and the arrow for the stern arrival direction 2620 are displayed based on the direction of arrival. The bow or stern which has not reached the quay at this point may, for example, be a simple straight line.
  • the numerical value of the arrival declination 263 and the mark 2630 that schematically represents the arrival declination are displayed based on the arrival declination calculated by the calculation unit 50. At this time, the mark 2630 is displayed based on the direction of the declination angle.
  • the navigation support device 10 can provide the predicted speed and the predicted declination when the ship 90 will dock in a manner that is easy for the operator to understand using numerical values and various marks.
  • Warning display window 27 displays system alerts and the like.
  • the navigation support device 10 can summarize information that can provide navigation support (ship maneuvering support) when the ship 90 docks on one screen and provide it to the operator in an easy-to-understand manner.
  • the navigation support device 10 calculates and displays the predicted wake of the vessel 90 using the quay direction velocity and quay direction acceleration on the bow side, and the quay direction velocity and quay direction acceleration on the stern side. Thereby, the navigation support device 10 can provide the operator with a predicted track that reflects the actual behavior of the ship 90 with high accuracy. Furthermore, since the predicted track is displayed at equal time intervals, the navigation support device 10 can provide the operator with the actual behavior of the vessel 90 in consideration of acceleration in an easy-to-understand manner.
  • the navigation support device 10 can highly accurately present a predicted trajectory that also takes into account the acceleration of the bow and stern, can support highly accurate speed control and attitude control, and can support safe berthing.
  • navigation support device 10 can also display the following display windows in addition to the various display windows described above.
  • FIG. 10 is a diagram showing an example of a quay arrival prediction display window.
  • a schematic bow mark 2891 and a schematic stern mark 2892 are displayed in the quay arrival prediction display window 28.
  • the bow model mark 2891 and the stern model mark 2892 are arranged side by side in the vertical direction of the quay arrival prediction display window 28.
  • the bow berth arrival time 2811 is displayed as a numerical value
  • the bow berth direction speed 2812 when the ship reaches the bow berth is displayed as a numeric value
  • the stern berth arrival time 2821 is displayed as a numeric value.
  • the stern quay direction speed 2822 at the time is displayed numerically.
  • a predicted declination angle 283 at the time of arrival at the quay is displayed as a numerical value
  • a mark 2830 that roughly represents the predicted declination angle at the time of arrival at the quay is displayed.
  • the bow berth arrival time 2811 and the bow berth direction speed 2812 are arranged near the bow schematic mark 2891.
  • the stern quay arrival time 2821 and the stern quay direction speed 2822 are arranged near the stern schematic mark 2892 .
  • a predicted declination angle 283 at the time of reaching the quay and a mark 2830 that schematically represents the predicted declination angle at the time of reaching the quay are arranged between the bow schematic mark 2891 and the stern schematic mark 2892 in the vertical direction of the quay arrival prediction display window 28. Ru.
  • the bow berth arrival time 2811 and the bow berth direction speed 2812 are displayed based on the predicted bow arrival time and predicted bow arrival speed calculated by the calculation unit 50.
  • the stern quay arrival time 2821 and the stern quay direction speed 2822 are displayed based on the predicted stern arrival time and the predicted stern arrival speed calculated by the calculation unit 50.
  • the predicted declination angle at the time of arrival at the quay 283 and the mark 2830 that schematically represents the predicted declination at the time of arrival at the quay are displayed based on the declination at the time of arrival calculated by the calculation unit 50.
  • the navigation support device 10 can provide the operator with the predicted arrival time, predicted arrival speed, and predicted declination when the ship 90 docks using numerical values and various marks in a way that is easy to understand for the operator.
  • FIG. 11 is a diagram showing another example of the bow side video window.
  • the bow side video window 211A differs from the bow side video window 211 in a plurality of predicted positions 2112A(t1), 2112A(t2), 2112A(t3), and 2112A(t4).
  • the other configuration of the bow side video window 211A is the same as the bow side video window 211, and a description of the similar parts will be omitted.
  • the display mode of the plurality of predicted positions 2112A(t1) to 2112A(t4) changes depending on the risk of collision with the quay.
  • Changes in the display mode include, for example, changes in display color, change in display brightness, blinking, and types of display lines. For example, the display color changes to blue when the degree of danger is low, and to red when the degree of danger is high.
  • the display mode setting section (the calculation section 50 or the image composition section 60) sets an upper limit speed in the direction of the quay (upper limit speed) according to the distance between the predicted position and the quay.
  • the calculation unit 50 or the image synthesis unit 60 displays the predicted position differently depending on whether the speed is higher or lower than the upper limit speed.
  • the upper limit speed is set to 1 kn
  • the upper limit speed is set to 30 cm/sec
  • the upper limit speed is set to 1 kn
  • the upper limit speed is set to 15 cm/sec, and if it is less than 30 m, the upper limit speed is set to 10 cm/sec. Note that this is just an example, and is appropriately set depending on, for example, the state (shape, weight) of the ship 90, tidal current, wind direction and speed, etc.
  • the calculation unit 50 or the image synthesis unit 60 may set a plurality of degrees of risk for each distance, and change the display mode of the predicted position for each of the degrees of risk. In this case, for example, if the display color is used, the higher the degree of danger, the more red the color, and the lower the degree of danger, the more blue the color is.
  • the risk level is low at multiple predicted positions 2112A(t1) and 2112A(t2), the risk level is high at predicted position 2112A(t3), and the risk level is high at predicted position 2112A(t4). is even higher. Therefore, the calculation unit 50 or the image synthesis unit 60 makes the display mode different for the predicted positions 2112A(t1) and 2112A(t2), the predicted position 2112A(t3), and the predicted position 2112A(t4).
  • the bow side video window is shown as an example here, the stern side video window can be created in the same way.
  • the navigation support device 10 can provide visually easy-to-understand information about the berthing speed and the risk of collision with the quay. On the other hand, the navigation support device 10 can provide a visual indication that the landing speed is too slow.
  • FIG. 12 is a diagram showing another example of the bird's-eye view window.
  • the bird's eye view window 22A differs from the bird's eye view window 22 in a plurality of predicted positions 2212A (t1), 2212A (t2), 2212A (t3), and 2212A (t4).
  • the other configuration of the bird's eye view window 22A is the same as that of the bird's eye view window 22, and a description of the similar parts will be omitted.
  • the display mode of the plurality of predicted positions 2212A(t1) to 2212A(t4) changes depending on the risk of collision with the quay.
  • Changes in the display mode include, for example, changes in display color, change in display brightness, blinking, and types of display lines. For example, the display color changes to blue when the degree of danger is low, and to red when the degree of danger is high.
  • the calculation unit 50 or the image synthesis unit 60 determines the degree of risk based on the probability that either the bow or the stern will collide with the quay at a predetermined speed or higher, depending on the distance between the predicted position and the quay. Set. The calculation unit 50 or the image synthesis unit 60 changes the display mode of each predicted position based on this degree of risk.
  • the risk level is low at the predicted positions 2212A (t1) and 2212A (t2), the risk level is high at the predicted position 2212A (t3), and the risk level is high at the predicted position 2212A (t4). is even higher. Therefore, the calculation unit 50 or the image synthesis unit 60 makes the display mode different for the predicted positions 2212A(t1) and 2212A(t2), the predicted position 2212A(t3), and the predicted position 2212A(t4).
  • the navigation support device 10 can provide visually easy-to-understand information about the berthing speed and the risk of collision with the quay.
  • the navigational support device 10 can provide visual information that indicates that the turning angle is insufficient when landing on the shore while turning.
  • FIG. 13 is a diagram showing another example of the ship speed display window.
  • the ship speed display window 24A has a direction mark 2410A for the bow berth direction speed, a direction mark 2420A for the stern berth direction speed, and a direction mark 2420A for the bow and stern speed in the ship speed display window 24 described above. 2430A is different.
  • the other configuration of the ship speed display window 24A is the same as that of the ship speed display window 24, and a description of the similar parts will be omitted.
  • the display mode of the direction mark 2410A for the bow berth direction speed, the direction mark 2420A for the stern berth direction speed, and the direction mark 2430A for the bow and stern speed is changed according to the degree of risk for each predicted position range.
  • the direction mark 2410A for the bow berth direction speed, the direction mark 2420A for the stern berth direction speed, and the direction mark 2430A for the bow and stern speed are divided into a plurality of sections between the tip of the arrow and the base of the arrow.
  • the setting is such that the closer you get to the base of the arrow, the closer it is to the current time, and the closer you get to the tip of the arrow, the earlier the predicted time is.
  • the direction mark 2410A of the bow berth direction speed, the direction mark 2420A of the stern berth direction speed, and the direction mark 2430A of the bow and stern direction speed are used to predict a plurality of predictions of the bow side video window, the stern side video window, and the bird's eye view window for each section. Similar to the location, the display format changes depending on the degree of danger.
  • the navigation support device 10 can visually provide the risk of collision of the bow and stern with the quay using the direction mark 2410A for the speed toward the bow quay and the direction mark 2420A for the speed toward the stern quay. Further, by using the direction mark 2430A of the bow and stern speed, the navigation support device 10 can visually provide information as to whether the bridge 99 is close to the berthing reference point.
  • a mode is shown in which a plurality of predicted positions are generated and displayed at equal time intervals.
  • the navigation support device 10 can provide a more detailed predicted position as the distance to docking becomes shorter.
  • a plurality of sections are set according to the distance to the quay (distance in the direction perpendicular to the quay), and the time interval is changed for each section, and the time interval within the section is kept constant.
  • the navigation support device 10 can provide a more detailed predicted position for a section where the distance to docking is shorter, and can display the influence of acceleration in each section in an easy-to-understand manner.
  • the navigation support device 10 generally generates navigation support information using the following method.
  • 14(A) and 14(B) are flowcharts illustrating an example of a method for displaying a predicted position in the navigation support method according to the present embodiment. Note that since the specific contents of each process will be described above or later, the description here will be omitted as appropriate.
  • the navigation support device 10 detects movement state data of the ship 90 using the own ship state detection sensor 31 (S11).
  • the calculation unit 50 calculates the predicted position based on the own ship position, own ship speed, and own ship acceleration in the movement state data (S12).
  • the navigation support device 10 calculates a predicted attitude in the calculation unit 50 based on the heading and turning angular velocity in the motion state data (S13).
  • the navigation support device 10 uses the calculation unit 50 to calculate and display a predicted trajectory based on the predicted position and predicted attitude (S14).
  • the predicted wake is represented by a figure such as a line that schematically represents the berthing side of the ship 90.
  • the predicted trajectory only needs to include at least the predicted position. That is, for example, when the ship 90 is not turning, a highly accurate predicted track can be calculated using only the predicted position.
  • the navigation support device 10 detects motion state data of the ship 90 using the own ship state detection sensor 31 (S11).
  • the navigation support device 10 generates quay detection data using the quay detection sensor 32 (S15).
  • the navigation support device 10 calculates the declination angle between the ship 90 and the quay line using the heading of the motion state data and the coordinates or direction of the quay line of the quay detection data (S16).
  • the navigation support device 10 calculates the quay direction velocity and quay direction acceleration of the vessel 90 in the calculation unit 50 (S17).
  • the calculation unit 50 calculates a predicted track of the vessel 90 at the time of docking based on the berth direction velocity and the berth direction acceleration (S18).
  • the predicted wake is represented by a figure such as a line that schematically represents the berthing side of the vessel 90.
  • the navigation support device 10 displays the predicted trajectory on the display 20 using the image synthesis unit 60 (S16).
  • the navigation support device 10 updates the predicted position and displays it on the display 20 while repeating the above-described process.
  • the calculation unit 50 includes, for example, the following configuration. 15, FIG. 16, FIG. 17(A), FIG. 17(B), FIG. 18, FIG. 19(A), and FIG. 19(B) are functional blocks of the calculation unit of the navigation support device according to the embodiment of the present invention. It is a diagram.
  • FIG. 20 is a diagram for explaining the definition and calculation concept of the quay direction velocity and quay direction distance.
  • FIGS. 21(A) and 21(B) are diagrams for explaining the definition of the declination angle and the concept of calculating the speed in the direction of the quay.
  • the bow position P91 will be explained below as an example, the case where the bow position P93h (the end on the bow 91 side of the starboard side 93 for leaving and berthing) can be realized with the same configuration and processing.
  • the calculation section 50 includes a bow speed calculation section 511, a stern speed calculation section 512, a bow acceleration calculation section 513, a stern acceleration calculation section 514, a bow berth direction speed calculation section 515, and a bow berth direction acceleration calculation section. 516, a stern quay direction speed calculation section 517, a stern quay direction acceleration calculation section 518, a quay information detection section 521, and a yaw angle calculation section 522.
  • the bow speed calculation unit 511 calculates the bow speed v91 at the bow position P91 from the own ship speed in the hull coordinate system. For example, if the speed sensor of the own ship state detection sensor 31 is located at a location different from the bow position P91, such as the bridge 99, the bow speed at the bow position P91 is determined using the own ship speed and turning angular velocity detected by the speed sensor. Calculate v91. On the other hand, if a speed sensor is installed at the bow position P91, the measured value of this sensor is set as the bow speed v91.
  • the stern speed calculation unit 512 calculates the stern speed v93 at the stern position P93t from the own ship speed in the hull coordinate system. For example, if the speed sensor is located at a location different from the stern position P93t, such as the bridge 99, the stern speed v93 at the stern position P93t is calculated using the own ship speed, turning angular velocity, etc. detected by the speed sensor. On the other hand, if a speed sensor is installed at the stern position P93t, the measured value of this sensor is taken as the stern speed v93.
  • the bow acceleration calculation unit 513 calculates the bow acceleration a91 at the bow position P91 from the own ship acceleration in the hull coordinate system. For example, if the acceleration sensor of the own ship state detection sensor 31 is located at a location different from the bow position P91, such as the bridge 99, the bow acceleration at the bow position P91 is calculated using the own ship acceleration and turning angular velocity detected by the acceleration sensor. Calculate a91. On the other hand, if an acceleration sensor is installed at the bow position P91, the measured value of this sensor is taken as the bow acceleration a91.
  • the stern acceleration calculation unit 514 calculates the stern acceleration a93 at the stern position P93t from the own ship acceleration in the hull coordinate system. For example, if the acceleration sensor of the own ship state detection sensor 31 is located at a location different from the stern position P93t, such as the bridge 99, the stern acceleration at the stern position P93t is calculated using the own ship acceleration and turning angular velocity detected by the acceleration sensor. Calculate a93. On the other hand, if an acceleration sensor is installed at the stern position P93t, the measured value of this sensor is taken as the stern acceleration a93.
  • the quay information detection unit 521 detects the quay line from the quay detection data. Specifically, for example, the quay information detection unit 521 detects at least one straight line from the plurality of detected feature points, and uses a maximum likelihood method or the like to detect the straight line that is most likely to be a quay line as the quay line 2111. .
  • the quay line 2111 is a coordinate system (imaging coordinate system) of image data of the quay detection sensor 32, and the coordinates and direction of the quay line 2111 are detected.
  • the quay line direction is a direction indicating the direction in which the quay line extends.
  • the declination angle calculation unit 522 uses the quay line direction and the bow direction ⁇ to calculate the declination angle ⁇ , which is the angle formed between the ship's bow direction ⁇ and the quay line 2111. At this time, since the quay line azimuth and the bow azimuth ⁇ have different coordinate systems, the yaw angle calculation unit 522 calculates the yaw angle ⁇ by performing coordinate transformation to match these coordinate systems.
  • the bow berth direction speed calculation unit 515 calculates the bow berth direction speed vh1 based on the bow speed v91 and the deflection angle ⁇ . More specifically, as shown in FIG. 21(B), the bow quay direction speed calculation unit 515 uses the bow speed v91 and the bow direction ⁇ to calculate the bow speed vs91 and the starboard bow speed vb91. Calculate.
  • the bow berth direction speed calculating unit 515 calculates the berth direction component of the bow speed vs91 in the bow direction from the bow speed vs91 in the bow direction and the yaw angle ⁇ , and calculates the berth direction component of the bow speed vs91 in the starboard direction direction from the bow speed vb91 in the starboard direction and the yaw angle ⁇ .
  • the quay direction component of the bow speed vb91 is calculated.
  • the bow berth direction speed calculation unit 515 calculates the bow berth direction speed vh1 by combining (vector addition) the berth direction component of the bow direction bow speed vs91 and the berth direction component of the starboard direction bow speed vb91.
  • the bow berth direction acceleration calculation unit 516 calculates the bow berth direction acceleration ah1 based on the bow acceleration a91 and the deflection angle ⁇ .
  • the calculation method for the bow berth direction acceleration ah1 is the same as that for the bow berth direction velocity vh1.
  • the bow berth direction acceleration ah1 can also be calculated by a differential value of the bow berth direction velocity vh1 for a plurality of times.
  • the stern quay direction velocity calculation unit 517 calculates the stern quay direction velocity vt based on the stern velocity v93 and the yaw angle ⁇ .
  • the method for calculating the stern berth direction velocity vt is the same as that for the bow berth direction velocity vh1.
  • the stern quay direction acceleration calculation unit 518 calculates the stern quay direction acceleration at based on the stern acceleration a93 and the deflection angle ⁇ .
  • the method for calculating the stern wall direction acceleration at is the same as that for the bow berth direction velocity vh1. Note that the stern quay direction acceleration at can also be calculated by a differential value of the stern quay direction velocity vt over a plurality of time periods.
  • the navigation support device 10 can calculate the speed and acceleration in the direction of the quay with high accuracy. Furthermore, the navigation support device 10 can calculate the speed and acceleration in the direction of the quay separately at the bow position and the stern position. Thereby, the navigation support device 10 can calculate various predicted positions, predicted speeds, predicted times, predicted directions, and predicted declinations described above and later with high accuracy.
  • the calculation unit 50 includes a quay information detection unit 521, a bow position calculation unit 531, a stern position calculation unit 532, a bow side quay distance calculation unit 541, a stern side quay distance calculation unit 542, and a predicted bow arrival time. It includes a calculation section 551, a predicted bow arrival speed calculation section 552, a predicted stern arrival time calculation section 553, and a predicted stern arrival speed calculation section 554. In this embodiment, reaching the quay means that at least one of the bow position P91 and the stern position P93t has reached the quay.
  • the bow position calculation unit 531 calculates the bow position P91 in the absolute coordinate system from the own ship position. Specifically, the bow position calculation unit 531 stores in advance a coordinate relational expression between the installation coordinates of a positioning sensor that measures the own ship's position and the position coordinates of the bow position P91. The bow position calculation unit 531 calculates the position coordinates of the bow position P91 using the position coordinates of the absolute coordinate system measured by the positioning sensor and this coordinate relational expression.
  • the stern position calculation unit 532 calculates the stern position P93t in the absolute coordinate system from the own ship position.
  • the calculation method for the stern position P93t is the same as that for the bow position P91.
  • the bow side berth distance calculation unit 541 calculates the bow side berth distance DISh1 based on the bow position P91 and the berth line 2111. Specifically, the bow side quay distance calculation unit 541 stores in advance a coordinate transformation matrix between the video coordinate system and the absolute coordinate system. The bow side quay distance calculation unit 541 converts the quay line 2111 from the image coordinate system to the absolute coordinate system using this coordinate transformation matrix. The bow side berth distance calculation unit 541 calculates the length of the perpendicular line from the bow position P91 to the berth line 2111 (the bow side berth distance DISh1) in the absolute coordinate system using a formula for the distance between a point and a line segment. Further, the bow side berth distance calculation unit 541 calculates the coordinates of the foot P21h1 of the perpendicular by finding the intersection between the perpendicular and the berth line 2111.
  • the stern quay distance calculation unit 542 calculates the stern quay distance DISt and the perpendicular foot P21t based on the stern position P93t and the quay line 2111.
  • the method of calculating the stern quay distance DISt and the perpendicular leg P21t is the same as the bow quay distance DISh1.
  • the predicted bow arrival time calculation unit 551 calculates the predicted bow arrival time taph based on the bow berth direction velocity vh1, the bow berth direction acceleration ah1, and the bow side berth distance DISh1.
  • the predicted bow arrival time calculation unit 551 calculates the predicted bow arrival time taph using a general relational expression among speed, acceleration, distance, and time.
  • the predicted bow arrival speed calculation unit 552 calculates the predicted bow arrival speed vaph based on the bow berth direction speed vh1, the bow berth direction acceleration ah1, and the bow side berth distance DISh1.
  • the predicted bow arrival speed calculation unit 552 calculates the predicted bow arrival speed vaph using a general relational expression of speed, acceleration, distance, and time.
  • the predicted stern arrival time calculation unit 553 calculates the predicted stern arrival time tapt based on the stern quay direction speed vt, the stern quay direction acceleration at, and the stern quay distance DISt.
  • the stern arrival predicted time calculation unit 553 calculates the stern arrival predicted time tapt using a general relational expression of speed, acceleration, distance, and time.
  • the predicted stern arrival speed calculation unit 554 calculates the predicted stern arrival speed vapt based on the stern quay direction velocity vt, the stern quay direction acceleration at, and the stern quay distance DISt.
  • the predicted stern arrival speed calculation unit 554 calculates the predicted stern arrival speed vapt using a general relational expression of speed, acceleration, distance, and time.
  • the navigation support device 10 can calculate the predicted speed and predicted time at the time of reaching the quay with high accuracy. Thereby, the navigation support device 10 can predict the state of the ship 90 at the time of arrival at the quay with high accuracy, and can provide effective information with high accuracy at the time of docking.
  • the calculation unit 50 includes a predicted track calculation unit 56.
  • the predicted track calculation unit 56 receives input of the own ship position, own ship speed, own ship acceleration, heading, and turning angular velocity.
  • the predicted track calculation unit 56 calculates the predicted position of the ship 90 at the predicted time based on the own ship position, own ship speed, own ship acceleration, and predicted time (time elapsed from the current time).
  • the predicted track calculation unit 56 calculates the predicted attitude (predicted heading) of the ship 90 at the predicted time based on the heading and the turning angular velocity.
  • the predicted track calculation unit 56 calculates the turning angular acceleration from the turning angular velocity of multiple times in the past (preferably immediately before the current time), and based on the heading, the turning angular velocity, and the turning angular acceleration, the predicted attitude ( It is also possible to calculate the predicted heading.
  • the predicted track calculation unit 56 calculates a predicted track (a figure that simulates at least the side of the vessel 90 when it leaves and berths) at the predicted time based on the predicted position and the predicted attitude.
  • the calculation unit 50 includes a bow position calculation unit 531, a stern position calculation unit 532, and a predicted wake calculation unit 56.
  • the predicted wake calculation unit 56 calculates the predicted position of the bow position P91 at multiple times based on the current bow position P91, the bow berth direction velocity vh, and the bow berth direction acceleration ah. Specifically, the predicted track calculation unit 56 calculates the bow position P91 for each sampling time using a general relational expression of speed, acceleration, distance, and time.
  • the predicted wake calculation unit 56 calculates the predicted position of the stern position P93t at multiple times based on the current stern position P93t, the stern quay direction velocity vt, and the stern quay direction acceleration at. Specifically, the predicted track calculation unit 56 calculates the stern position P93t for each sampling time using a general relational expression of speed, acceleration, distance, and time.
  • the predicted track calculation unit 56 uses the bow position P91 and the stern position P93t for each sampling time to generate a figure such as a line simulating the berthing/berthing side for each sampling time.
  • the navigation support device 10 can calculate multiple predicted positions with high accuracy using velocity and acceleration. Thereby, the navigation support device 10 can predict the behavior of the ship 90 when berthing with high accuracy, and can provide effective information with high accuracy when berthing.
  • the calculation unit 50 includes a collision prediction unit 57.
  • the collision prediction unit 57 predicts a collision of the ship 90 with a quay based on the predicted bow arrival time taph, the predicted bow arrival speed vaph, the predicted stern arrival time tapt, and the predicted stern arrival speed vapt.
  • the collision prediction unit 57 compares the predicted bow arrival time taph and the predicted stern arrival time tapt, and selects the shorter one.
  • the collision prediction unit 57 predicts that a collision will occur if the predicted arrival speed of the selected side is higher than the berthing upper limit speed. For example, the collision prediction unit 57 predicts that the bow 91 will collide with the quay if the predicted bow arrival time taph is shorter than the predicted stern arrival time tapt and the predicted bow arrival speed vaph is higher than the upper limit berthing speed.
  • the calculation unit 50 includes an arrival heading calculation unit 582 and an arrival angle calculation unit 583.
  • the arrival heading calculation unit 582 calculates the arrival heading ⁇ e based on the heading, turning angular velocity, and predicted arrival time.
  • the arrival angle calculation unit 583 calculates the arrival angle ⁇ e (predicted argument) based on the arrival heading ⁇ e and the quay line orientation. Specifically, the arrival angle calculation unit 583 calculates the angle between the arrival heading ⁇ e and the quay line azimuth in an absolute coordinate system, and sets it as the arrival angle ⁇ e.
  • the calculation unit 50 includes a position-at-arrival calculation unit 581, a heading-at-arrival calculation unit 582, and a declination-at-arrival angle calculation unit 583.
  • the arrival position calculation unit 581 calculates the bow position P91 when the bow position P91 reaches the quay line 2111 based on the predicted bow arrival time taph and the predicted stern arrival time tapt. Specifically, the arrival position calculation unit 581 compares the predicted bow arrival time taph and the predicted stern arrival time tapt, and if it is predicted that the bow position P91 will arrive at the quay line 2111 earlier than the stern position P93t, The bow position P91 (berthing position) and the stern position P93t at that time are calculated.
  • the arrival position calculation unit 581 calculates the stern position P93t (berthing position) and the bow position P91 at that time. .
  • the arrival heading calculation unit 582 calculates the arrival heading ⁇ e based on the bow position P91 and the stern position P93t when the bow or stern reaches the quay line 2111. Specifically, the arrival heading calculation unit 582 calculates a straight line parallel to the bow and stern direction at the time of arrival from the bow position P91 and the stern position P93t at the time of arrival, and detects the orientation of this straight line in the absolute coordinate system. By doing so, the heading azimuth ⁇ e (predicted azimuth) at the time of arrival is calculated.
  • the arrival angle calculation unit 583 calculates the arrival angle ⁇ e (predicted argument) based on the arrival heading ⁇ e and the quay line orientation.
  • the navigation support device 10 can predict with high accuracy the yaw angle (yaw angle at arrival ⁇ e) at the time when the ship 90 reaches the quay. Thereby, the navigation support device 10 can provide effective information with high accuracy at the time of docking.
  • (Calculation method of quay direction distance and quay direction acceleration) 22(A) and 22(B) are flowcharts illustrating an example of a method for calculating the quay direction distance and quay direction acceleration in the navigation support method according to the present embodiment. Note that since the specific contents of each process have been described above, the description here is appropriately omitted.
  • the navigation support device 10 measures the own ship speed and own ship acceleration using the own ship state detection sensor 31 (S21).
  • the navigation support device 10 generates quay detection data using the quay detection sensor 32 (S31).
  • the navigation support device 10 calculates the declination angle ⁇ in the calculation unit 50 (S32).
  • the navigation support device 10 calculates the speed in the direction of the quay and the acceleration in the direction of the quay at the position of the own ship state detection sensor 31 based on the own ship speed, the own ship acceleration, and the deflection angle ⁇ (S22 ).
  • the navigation support device 10 determines the bow position P91 based on the quay direction velocity and quay direction acceleration at the position of the own ship state detection sensor 31 and the relationship between the sensor position, the bow position P91, and the stern position P93t.
  • the bow quay direction speed vh1 and the bow quay direction acceleration ah1 at the stern position P93t, and the stern quay direction velocity vt and the stern quay direction acceleration at at the stern position P93t are calculated.
  • the navigation support device 10 measures the own ship speed and own ship acceleration using the own ship state detection sensor 31 (S21).
  • the navigation support device 10 uses the calculation unit 50 to calculate bow speed v91, bow acceleration a91, stern speed v93, and stern acceleration a93 from the own ship speed (S24).
  • the navigation support device 10 generates quay detection data using the quay detection sensor 32 (S31).
  • the navigation support device 10 calculates the declination angle ⁇ in the calculation unit 50 (S32).
  • the navigation support device 10 uses the calculation unit 50 to determine the speed at the bow position P91 based on the bow speed v91 and bow acceleration a91 at the bow position P91, the stern velocity v93 and stern acceleration a93 at the stern position P93t, and the yaw angle ⁇ .
  • the bow quay direction speed vh1 and the bow quay direction acceleration ah1 of the ship, and the stern quay direction velocity vt and the stern quay direction acceleration at at the stern position P93t are calculated (S25).
  • (Calculation method of predicted speed and predicted declination upon arrival at quay) 23(A) and 23(B) are flowcharts illustrating an example of a method for calculating a predicted speed and a predicted declination upon arrival at a quay in the navigation support method according to the present embodiment. Note that since the specific contents of each process have been described above, the description here is appropriately omitted.
  • First Example Step S40 in FIG. 23(A) is similar to the processing in FIGS. 22(A) and 22(B), and the description thereof will be omitted.
  • the navigation support device 10 calculates the bow side berth distance DISh1 and the stern side berth distance DISt based on the bow position P91, the stern position P93t, and the berth line 2111 (S41).
  • the navigation support device 10 uses the calculation unit 50 to calculate the following values based on the bow berth direction velocity vh1, the bow berth direction acceleration ah1, the stern berth direction velocity vt, the stern berth direction acceleration at, the bow side berth distance DISh1, and the stern side berth distance DISt. Then, the predicted bow arrival time taph, the predicted stern arrival time tapt, the predicted bow arrival speed vaph, and the predicted stern arrival speed vapt are calculated (S42).
  • the navigation support device 10 uses the calculation unit 50 to calculate the bow heading ⁇ e at the time of arrival based on the bow position P91 and the stern position P93t when the bow or stern reaches the quay line 2111 (S43).
  • the navigation support device 10 uses the calculation unit 50 to calculate the arrival angle ⁇ e based on the arrival heading ⁇ e and the quay bearing (S44).
  • the navigation support device 10 uses the calculation unit 50 to calculate the bow heading ⁇ e at the time of arrival based on the heading ⁇ , the turning angular velocity, and the predicted arrival time (S43A ).
  • the predicted arrival time is calculated in the same way as the process in FIG. 23(A).
  • the navigation support device 10 uses the calculation unit 50 to calculate the arrival angle ⁇ e based on the arrival heading ⁇ e and the quay bearing (S44).
  • Code modules may be stored on any type of non-transitory computer-readable medium or other computer storage device. Some or all of the methods may be implemented in dedicated computer hardware.
  • the various example logic blocks and modules described in connection with the embodiments disclosed herein may be implemented or executed by a machine such as a processor.
  • the processor may be a microprocessor, but in the alternative, the processor may be a controller, microcontroller, or state machine, or a combination thereof.
  • a processor may include electrical circuitry configured to process computer-executable instructions.
  • the processor includes an application specific integrated circuit (ASIC), field programmable gate array (FPGA), or other programmable device that performs logical operations without processing computer-executable instructions.
  • a processor may also refer to a combination of computing devices, such as a combination of a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors in combination with a DSP core, or any other combination thereof.
  • processors may also include primarily analog components.
  • a computing environment includes any type of computer system including, but not limited to, a computer system based on a microprocessor, mainframe computer, digital signal processor, portable computing device, device controller, or computational engine within an apparatus. be able to.
  • conditional language such as “could,” “could,” “would,” or “might” means that a particular embodiment includes a particular feature, element, and/or step; Embodiments are understood within the context commonly used to convey that they do not include. Thus, such conditional language generally states that the features, elements, and/or steps are in any way required by one or more embodiments, or that one or more embodiments require these features. , are not necessarily meant to include logic for determining whether an element and/or step is included or performed in any particular embodiment.
  • Disjunctive language such as the phrase "at least one of X, Y, Z,” means that the item, term, etc. Understood in the context where it is commonly used to indicate that it can be (e.g. X, Y, Z). Thus, such a disjunctive language generally requires that a particular embodiment of each of at least one of X, at least one of Y, or at least one of Z be present. does not mean.
  • a processor configured to execute the following A, B, and C means a first processor configured to execute A and a second processor configured to execute B and C. and a processor.
  • a processor configured to execute the following A, B, and C means a first processor configured to execute A and a second processor configured to execute B and C. and a processor.
  • the terms used herein generally include “non-limiting” terms (e.g., the term “including” should be construed as “including, but not limited to,” and ""
  • the term ⁇ having'' should be interpreted as ⁇ having at least...'' and the term ⁇ including'' should be interpreted as ⁇ including, but not limited to.'' A person skilled in the art would judge that it is.
  • horizontal refers to a plane parallel to the plane or surface of the floor of the area in which the described system is used, regardless of its orientation; is defined as the plane in which the method is performed.
  • floor may be replaced by the term “ground” or “water surface”.
  • vertical/vertical refers to a direction perpendicular/perpendicular to a defined horizontal line. Terms such as “above,” “below,” “below,” “above,” “side,” “higher,” “lower,” “above,” “over,” and “below” are defined with respect to the horizontal plane. ing.
  • connection refers to removable, movable, fixed, adjustable, removable, movable, fixed, adjustable, and/or should be construed to include removable connections or connections.
  • Connections/couplings include direct connections and/or connections with intermediate structures between two described components.
  • Navigation support device 20 Displays 22, 22A: Bird's-eye view window 23: Numerical data display window 24, 24A: Ship speed display window 25: Direction relationship display window 26: Arrival prediction information display window 27: Warning display window 28: Quay Arrival prediction display window 31: own ship state detection sensor 32: quay detection sensor 41, 42: camera 50: calculation unit 56: predicted track calculation unit 57: collision prediction unit 60: image synthesis unit 90: ship 91: bow 92: stern 93: Starboard side 94: Port side 99: Bridge 200: Display screen 211: Bow side video window 211A: Bow side video window 212: Stern side video window 220: Current status mark 220tp: Past track mark 231: Bow side quay distance display window 232 : Bridge quay reference point distance display window 233: Stern side quay distance display window 234: Declination angle display window 241: Bow quay direction speed 242: Stern quay direction speed 251: Direction display window 252: Turning angular velocity display window 261: Bow

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Abstract

Le problème décrit par la présente invention est de fournir des informations hautement précises indiquant l'état d'un navire jusqu'à l'amarrage. La solution selon l'invention porte sur un dispositif d'aide à la navigation qui est pourvu d'un capteur de détection d'état de navire et d'une unité de calcul de trajectoire de navire. Le capteur de détection d'état de navire détecte la position du navire et l'accélération du navire. L'unité de calcul de trajectoire de navire calcule une trajectoire du navire sur la base de la position du navire et de l'accélération du navire.
PCT/JP2023/031640 2022-09-05 2023-08-30 Dispositif d'aide à la navigation et procédé d'aide à la navigation WO2024053524A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1045095A (ja) * 1996-08-07 1998-02-17 Unyusho Senpaku Gijutsu Kenkyusho ジョイスティック制御の予測位置表示装置
JPH10267686A (ja) * 1997-03-24 1998-10-09 Kaiyo Sogo Giken:Kk 無線ｌａｎによる船舶の衝突を予防するための航行援助システム
JP2931881B2 (ja) * 1991-10-04 1999-08-09 古野電気株式会社 表示装置
WO2021049221A1 (fr) * 2019-09-09 2021-03-18 古野電気株式会社 Système d'affichage d'informations de navire, procédé d'affichage d'informations de navire, dispositif de génération d'image et programme

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2931881B2 (ja) * 1991-10-04 1999-08-09 古野電気株式会社 表示装置
JPH1045095A (ja) * 1996-08-07 1998-02-17 Unyusho Senpaku Gijutsu Kenkyusho ジョイスティック制御の予測位置表示装置
JPH10267686A (ja) * 1997-03-24 1998-10-09 Kaiyo Sogo Giken:Kk 無線ｌａｎによる船舶の衝突を予防するための航行援助システム
WO2021049221A1 (fr) * 2019-09-09 2021-03-18 古野電気株式会社 Système d'affichage d'informations de navire, procédé d'affichage d'informations de navire, dispositif de génération d'image et programme

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