A method and system for monitoring a ship's anchorage

Abstract

The application discloses a kind of ship anchorage monitoring method, comprising: step S1, before anchoring, according to ship position setting ship anchor position, after calculating the coordinates of anchorage, positioning is carried out to anchorage;Step S2, the ship that throws anchor is made to reach the anchor position, and anchoring is carried out;Step S3, after completing anchoring, monitoring main ship, ship anchor position;Step S4, the size of actual ship anchor length and the distance of anchor point coordinates inverse calculation is judged, if anchor cable length is less than inverse calculation distance reaches first early warning value, then walk anchor occurs, and alarm, personnel intervention and timely processing alarm matter;Step S5, the nearest distance of ship anchor position and submarine cable is judged, when distance is less than second early warning value, alarm, personnel intervention and timely processing alarm matter;Step S6, the distance of main ship actual position and wind turbine is judged, when distance is less than third early warning value, alarm;Also disclosed is a kind of ship anchorage monitoring system.When safety risk can be generated in construction process, timely alarm reminds, avoids the occurrence of safety accident.

Description

Technical Field

[0001] This invention relates to a method and system for monitoring ship anchorage. Background Technology

[0002] As the development of offshore wind farms in China accelerates, the scale of these farms will continue to grow, extending further offshore and into deeper waters, leading to increasingly harsh marine environments. This massive installed capacity will drive the development of the offshore wind power operation and maintenance (O&M) market, especially as many existing offshore wind turbines have reached the end of their warranty periods in recent years, significantly expanding the O&M market.

[0003] In the operation and maintenance of offshore wind power, different types of vessels are required to complete the tasks. The sea conditions in the areas where wind farms are located are complex, with numerous submarine cables. If construction vessels illegally anchor or drag their anchors during construction, it can damage nearby submarine cables and even lead to collisions with wind turbines and other structures, causing irreparable economic losses and significant social impact. Therefore, it is crucial to prioritize the protection of cables along the route during construction, placing high demands on the anchoring and positioning of construction vessels and their monitoring of anchor positions.

[0004] Therefore, it is necessary to design a method and system for monitoring ship anchor positions to achieve real-time monitoring of ship and anchor positions, ensuring that ships maintain safe distances from wind turbine foundations and anchors from submarine cables. This will significantly improve the safety and stability of ship operations at sea, and has significant social and economic value. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing methods and provide a ship anchorage monitoring method and system that can promptly issue alarms and reminders when safety risks may arise during construction, thereby preventing safety accidents from occurring.

[0006] The technical solution to achieve the above objectives is:

[0007] One of the present inventions is a method for monitoring ship anchorage, comprising:

[0008] Step S1: Before anchoring, set the anchor position according to the ship's position, calculate the anchor coordinates, and then locate the anchor position.

[0009] Step S2: The anchored vessel moves to the anchoring position and anchors.

[0010] Step S3: After anchoring is completed, monitor the position of the main vessel and the anchor.

[0011] Step S4: Determine the difference between the actual anchor length and the distance calculated from the anchoring point coordinates. If the anchor cable length is less than the calculated distance and reaches the first warning value, anchor dragging occurs, an alarm is triggered, and personnel intervene to handle the alarm promptly. Otherwise, anchor dragging does not occur.

[0012] Step S5: Determine the closest distance between the anchor and the submarine cable. If the distance is less than the second warning value, an alarm will be triggered and personnel will intervene to handle the alarm promptly. Otherwise, no intervention is required.

[0013] Step S6: Determine the actual position of the main vessel and the distance between it and the wind turbine. If the distance is less than the third warning value, an alarm will be triggered and personnel will intervene to handle the alarm in a timely manner. Otherwise, no intervention is required.

[0014] Preferably, in steps S4, S5 and S6, an audible and visual alarm is used to trigger the alarm, including red, yellow and green indicator lights.

[0015] Preferably, in step S4, when the distance is calculated by back-calculating the coordinates of the four corner points of the ship and the corresponding anchoring point, and the anchor cable length is obtained by rotating the sensor, when the anchor cable length is less than the calculated distance and reaches the first warning value, anchor dragging occurs, and the audible and visual alarm sounds an alarm. The alarm is divided into level 1 alarm and level 2 alarm. In level 1 alarm, the indicator light is yellow, an alarm is issued and flashes at a low frequency; in level 2 alarm, the indicator light is red, an alarm is issued and flashes at a high frequency; otherwise, if anchor dragging does not occur, the indicator light is green.

[0016] In step S5, by using the coordinates of the four corners of the ship, the direction of the anchored ship corresponding to the anchor, and the length of the anchor cable, the coordinates of the anchor point are calculated in real time, and the shortest distance from the anchor point to the submarine cable is calculated. When the distance is less than the second warning value, the audible and visual alarm will sound an alarm. The alarm is divided into level 1 alarm and level 2 alarm. For level 1 alarm, the indicator light is yellow, an alarm is issued and flashes at a low frequency. For level 2 alarm, the indicator light is red, an alarm is issued and flashes at a high frequency. Conversely, the indicator light is green.

[0017] In step S6, the position coordinates of the main vessel are obtained by real-time positioning, and the distance from the side of the vessel to the wind turbine is calculated. When the distance is less than the third warning value, the audible and visual alarm will sound an alarm. The alarm is divided into level 1 alarm and level 2 alarm. In level 1 alarm, the indicator light is yellow, an alarm is issued and flashes at a low frequency. In level 2 alarm, the indicator light is red, an alarm is issued and flashes at a high frequency. Conversely, the indicator light is green.

[0018] A second type of ship anchorage monitoring system of the present invention includes:

[0019] Anchored end:

[0020] The first satellite receiver is used to locate the position of the anchored ship in real time.

[0021] The data radio is used to send the location of the anchored vessel to the monitoring module;

[0022] A rotation sensor, installed on the anchor, is used to monitor the number of rotations of the anchor when it is dropped, thereby obtaining the length of the anchor rod when it is extended or retracted.

[0023] Main ship end:

[0024] The second satellite receiver is used to locate the main vessel's position in real time.

[0025] The third satellite receiver is used to receive the accurate location of each submarine cable and wind turbine;

[0026] The monitoring module is used to monitor the position of the main vessel and anchor in real time;

[0027] The early warning module is used to determine the distance between the main vessel and the wind turbine, and between the anchor and the submarine cable, and to trigger an alarm when a certain limit is reached.

[0028] The storage module is used to store positioning data of the anchored vessel, the main vessel, the submarine cable, and the wind turbine, as well as rotation sensor data.

[0029] Preferably, the monitoring module includes:

[0030] A GPS handheld device is used to determine the anchor position before anchoring, based on the ship's position, and to locate the anchor position after calculating the anchor coordinates.

[0031] The anchor-to-submarine cable distance acquisition unit is used to obtain the actual position of the anchor by using the positions of the main vessel, the anchored vessel, and the length of the anchor haul-in / out, and then to obtain the distance from the anchor to the submarine cable.

[0032] The main vessel wind turbine distance acquisition unit is used to obtain the distance from the main vessel to the wind turbine by locating the position of the main vessel and the position of the wind turbine in real time;

[0033] The display unit is used to display the relative positions of the ship, wind turbine, anchor, and submarine cable in real time in a two-dimensional plane.

[0034] Preferably, the early warning module includes:

[0035] The anchor dragging alarm unit calculates the distance by using the coordinates of the four corner points of the ship and the coordinates of the corresponding anchor dropping points. It obtains the length of the anchor cable through the rotation sensor and issues an alarm when the length of the anchor cable is less than the calculated distance and reaches the first warning value.

[0036] The ship anchor colliding with the submarine cable alarm unit calculates the anchor's position coordinates in real time by using the coordinates of the ship's four corner points, the direction of the corresponding anchoring ship, and the length of the anchor cable. It also calculates the shortest distance from the anchor point to the submarine cable and issues an alarm when the distance is less than the second warning value.

[0037] The main vessel collision alarm unit obtains the position coordinates of the main vessel in real time, calculates the distance from the side of the vessel to the wind turbine, and issues an alarm when the distance is less than the third warning value.

[0038] Preferably, the anchor dragging alarm unit, the anchor hitting the submarine cable alarm unit, and the main vessel hitting the wind turbine alarm unit are all equipped with two levels for the first warning value, the second warning value, and the third warning value, namely, level 1 alarm and level 2 alarm.

[0039] Preferably, the early warning module further includes:

[0040] Three audible and visual alarms are used for alarm processing of the anchor dragging alarm unit, the anchor hitting the submarine cable alarm unit, and the main vessel hitting the wind turbine alarm unit, respectively.

[0041] Preferably, the audible and visual alarm includes three color indicator lights: red, yellow, and green. When the red indicator light is on, it indicates a level 2 alarm; when the yellow indicator light is on, it indicates a level 1 alarm; and when the green indicator light is on, it indicates a normal state.

[0042] Preferably, when the audible and visual alarm sounds, the alarm can be canceled by the anchor dragging alarm unit, the anchor hitting the submarine cable alarm unit, or the main vessel hitting the wind turbine alarm unit, or by unplugging the power cord of the audible and visual alarm.

[0043] The beneficial effects of this invention are as follows: By acquiring the real-time position of the main vessel and calculating the actual position of the anchor, this invention can determine whether anchor dragging has occurred, the closest distance from the anchor point to the submarine cable, and whether the distance between the main vessel and the wind turbine is too small. When anchor dragging occurs or the closest distance from the anchor point to the submarine cable or the distance between the main vessel and the wind turbine is too small, an alarm can be triggered in a timely manner. Project personnel can then handle the alarm in a timely manner based on the actual situation on site to avoid safety accidents. This invention enables real-time monitoring of the vessel position and anchor position, ensuring that the vessel and the wind turbine foundation, as well as the anchor and the submarine cable, maintain a safe distance, which greatly improves the safety and stability of marine operations and has significant social and economic value. Attached Figure Description

[0044] Figure 1 This is a flowchart of a ship anchorage monitoring method according to the present invention;

[0045] Figure 2 This is a block diagram of a ship anchorage monitoring system according to the present invention;

[0046] Figure 3 This is a specific module diagram of the monitoring module in this invention;

[0047] Figure 4 This is a detailed module diagram of the early warning module in this invention;

[0048] Figure 5This is a diagram showing the coordinate-based distance and the actual anchor cable length in this invention;

[0049] Figure 6 This is a schematic diagram of the anchoring and positioning setup in this invention;

[0050] Figure 7 This is a schematic diagram of the distance monitoring from the main vessel to the wind turbine pile in this invention;

[0051] Figure 8 This is a schematic diagram of submarine cable monitoring in this invention. Detailed Implementation

[0052] The technical solution of the present invention will now be clearly and completely described in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] The invention will now be further described with reference to the accompanying drawings.

[0054] like Figure 1 As shown, a method for monitoring ship anchorage includes:

[0055] Step S1: Before anchoring, set the anchor position according to the ship's position, calculate the anchor coordinates, and then locate the anchor position.

[0056] Step S2: The anchored vessel moves to the anchoring position and anchors. Anchoring positioning diagram is shown below. Figure 6 As shown.

[0057] Step S3: After anchoring is completed, monitor the position of the main vessel and the anchor.

[0058] Step S4: Determine the difference between the actual anchor length and the calculated distance from the anchoring point coordinates. If the anchor cable length is less than the calculated distance and reaches the first warning value, anchor dragging occurs, an alarm is triggered, and personnel intervene to handle the alarm promptly. Otherwise, if anchor dragging does not occur, personnel do not need to intervene.

[0059] In this embodiment, if anchor drift occurs, an audible and visual alarm is triggered, including indicator lights of three colors: red, yellow, and green.

[0060] In this embodiment, when the distance is calculated by back-calculating the coordinates of the four corner points of the ship and the corresponding anchoring points, and the anchor cable length is obtained by rotating the sensor, if the anchor cable length is less than the calculated distance and reaches the first warning value, anchor dragging occurs, and the audible and visual alarm 74 sounds an alarm. The alarm is divided into level 1 and level 2. For level 1 alarm, the indicator light is yellow, an alarm is issued, and it flashes at a low frequency. For level 2 alarm, the indicator light is red, an alarm is issued, and it flashes at a high frequency. Conversely, if anchor dragging does not occur, the indicator light is green, and a graph showing the calculated distance and the actual anchor cable length is displayed, as shown below. Figure 5 As shown.

[0061] Step S5: Determine the closest distance between the anchor and the submarine cable. If the distance is less than the second warning value, an alarm will be triggered and personnel will intervene to handle the alarm promptly. Otherwise, no personnel intervention is required.

[0062] In this embodiment, by using the coordinates of the four corners of the ship, the direction of the anchored ship corresponding to the anchor, and the length of the anchor cable, the position coordinates of the anchor are calculated in real time, and the shortest distance from the anchor point to the submarine cable is calculated. When the distance is less than the second warning value, the audible and visual alarm 74 will sound an alarm. The alarm is divided into level 1 alarm and level 2 alarm. For level 1 alarm, the indicator light is yellow, an alarm is issued and flashes at a low frequency. For level 2 alarm, the indicator light is red, an alarm is issued and flashes at a high frequency; otherwise, the indicator light is green.

[0063] Step S6: Determine the actual position of the main vessel and the distance between it and the wind turbine. If the distance is less than the third warning value, an alarm will be triggered and personnel will intervene to handle the alarm in a timely manner. Otherwise, personnel intervention is not required.

[0064] In this embodiment, the position coordinates of the main vessel are obtained through real-time positioning, and the distance from the side of the vessel to the wind turbine is calculated. When this distance is less than the third warning value, the audible and visual alarm 74 sounds an alarm. The alarm is divided into Level 1 and Level 2. For Level 1 alarm, the indicator light is yellow, an alarm is triggered, and the light flashes at a low frequency. For Level 2 alarm, the indicator light is red, an alarm is triggered, and the light flashes at a high frequency. Conversely, the indicator light is green. A schematic diagram of the distance monitoring from the main vessel to the wind turbine is shown below. Figure 7 As shown.

[0065] It can prevent safety accidents, enable real-time monitoring of ship position and anchor position, ensure that the ship and wind turbine foundation and the anchor and submarine cable maintain a safe distance, greatly improve the safety and stability of ship operations at sea, and has significant social and economic value.

[0066] like Figure 2 As shown, a ship anchorage monitoring system includes: a first satellite receiver 1, a data transmission radio 2, a rotation sensor 3, a second satellite receiver 4, a third satellite receiver 5, a monitoring module 6, an early warning module 7, and a storage module 8.

[0067] Anchored end:

[0068] The first satellite receiver 1 is used to locate the position of the anchored ship in real time.

[0069] Data radio 2 is used to send the location of the anchored vessel to the monitoring module 6.

[0070] Rotation sensor 3, installed on the anchor, is used to monitor the number of rotations of the anchor when it is dropped, and thus obtain the length of the anchor haul-in / out.

[0071] Main ship end:

[0072] The second satellite receiver 4 is used to locate the position of the main vessel in real time.

[0073] The third satellite receiver 5 is used to receive the accurate locations of various submarine cables and wind turbines. A schematic diagram of submarine cable monitoring is shown below. Figure 8 As shown.

[0074] Monitoring module 6 is used to monitor the position of the main vessel and anchor in real time.

[0075] like Figure 3 As shown, the monitoring module 6 specifically includes: a GPS handheld device 61, an anchor-to-submarine cable distance acquisition unit 62, a main vessel-to-wind-trailer distance acquisition unit 63, and a display unit 64; the GPS handheld device 61 is used to locate the anchor position before anchoring by setting the anchor position based on the vessel's position, calculating the anchor position coordinates, and then locating the anchor position; the anchor-to-submarine cable distance acquisition unit 62 is used to obtain the actual position of the anchor by using the positions of the main vessel, the anchored vessel, and the length of the anchor haulage, and then obtain the distance from the anchor to the submarine cable; the main vessel-to-wind-trailer distance acquisition unit 63 is used to obtain the distance from the main vessel to the wind turbine by real-time positioning of the main vessel's position and the wind turbine's position; the display unit 64 is used to display the relative positional relationships of the vessel, wind turbine, anchor, and submarine cable in a two-dimensional plane in real time.

[0076] The early warning module 7 is used to determine the distance between the main vessel and the wind turbine, and between the anchor and the submarine cable, and to trigger an alarm when a certain limit is reached.

[0077] like Figure 4As shown, the early warning module 7 includes: an anchor dragging alarm unit 71, an anchor hitting a submarine cable alarm unit 72, a main vessel hitting a wind turbine alarm unit 73, and three audible and visual alarms 74. The anchor dragging alarm unit 71 calculates the distance by using the coordinates of the four corner points of the ship and the coordinates of the corresponding anchoring point, and obtains the length of the anchor cable through the rotation sensor. When the length of the anchor cable is less than the calculated distance and reaches the first warning value, an alarm is triggered. The anchor hitting a submarine cable alarm unit 72 calculates the position coordinates of the anchor in real time by using the coordinates of the four corner points of the ship, the direction of the anchoring ship corresponding to the anchor, and the measured length of the anchor cable. It calculates the shortest distance from the anchor point to the submarine cable and triggers an alarm when the distance is less than the second warning value. The main vessel hitting a wind turbine alarm unit 73 obtains the position coordinates of the main vessel in real time, calculates the distance from the side of the vessel to the wind turbine, and triggers an alarm when the distance is less than the third warning value. The three audible and visual alarms 74 are used for alarm processing of the anchor dragging alarm unit 71, the anchor hitting a submarine cable alarm unit 72, and the main vessel hitting a wind turbine alarm unit 73, respectively.

[0078] In the embodiment, the first warning value, the second warning value, and the third warning value are all set with two levels, namely level 1 alarm and level 2 alarm, in the anchor dragging alarm unit 71, the anchor hitting the submarine cable alarm unit 72, and the main ship hitting the wind turbine alarm unit 73.

[0079] In this embodiment, the audible and visual alarm 74 includes three color indicator lights: red, yellow, and green. When the red indicator light is on, it indicates a level 2 alarm; when the yellow indicator light is on, it indicates a level 1 alarm; and when the green indicator light is on, it indicates a normal state.

[0080] In this embodiment, when the audible and visual alarm 74 sounds an alarm, the alarm can be canceled by the anchor dragging alarm unit 71, the anchor hitting the submarine cable alarm unit 72, or the main vessel hitting the wind turbine alarm unit 73, or by unplugging the power cord of the audible and visual alarm 74.

[0081] In this embodiment, the second satellite receiver 4 locates the position of the main vessel in real time. If the center position of the main vessel changes too much from the position located before construction begins, the main vessel will also trigger an alarm from the wind turbine alarm unit 73.

[0082] Storage module 8 is used to store positioning data of the anchored vessel, the main vessel, the submarine cable and the wind turbine, as well as rotation sensor data.

[0083] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for monitoring ship anchorage, characterized in that, include: Step S1: Before anchoring, set the anchor position based on the position of the main vessel. The position of the main vessel is the ship's position, and the anchor position is the anchor position. After calculating the anchor position coordinates, locate the anchor position. Step S2: The anchored vessel travels to the anchoring position and anchors. Step S3: After anchoring is completed, monitor the position of the main vessel and the anchor. Step S4: Determine the difference between the actual anchor cable length and the distance calculated from the anchor point coordinates. If the anchor cable length is less than the calculated distance and reaches the first warning value, anchor drift will occur, triggering an alarm. Personnel will intervene to handle the alarm promptly. Otherwise, anchor drift will not occur. Step S5: Determine the closest distance between the anchor and the submarine cable. If the distance is less than the second warning value, an alarm will be triggered and personnel will intervene to handle the alarm promptly. Otherwise, no intervention is required. Step S6: Determine the distance between the main vessel's actual position and the wind turbine. If the distance is less than the third warning value, an alarm will be triggered, and personnel will intervene to handle the alarm promptly. Otherwise, no intervention is required. In steps S4, S5 and S6, an alarm is triggered by an audible and visual alarm device. In step S4, the distance is calculated by using the coordinates of the four corner points of the main vessel and the coordinates of the corresponding anchoring points. The length of the anchor cable is obtained by using a rotation sensor. When the length of the anchor cable is less than the calculated distance and reaches the first warning value, anchor dragging occurs, and the audible and visual alarm is triggered. The alarm is divided into level 1 and level 2. For level 1 alarm, the indicator light is yellow, an alarm sound is emitted, and the light flashes at a low frequency. For level 2 alarm, the indicator light is red, an alarm sound is emitted, and the light flashes at a high frequency. Conversely, if no anchor dragging occurs, the indicator light is green. In step S5, the anchor's position coordinates are calculated in real time using the coordinates of the four corner points of the main vessel, the direction of the corresponding anchoring vessel, and the length of the anchor cable. The shortest distance from the anchor point to the submarine cable is calculated. When the distance is less than the second warning value, the audible and visual alarm is triggered. The alarm is divided into Level 1 and Level 2. In Level 1, the indicator light is yellow, an alarm sound is emitted, and the light flashes at a low frequency. In Level 2, the indicator light is red, an alarm sound is emitted, and the light flashes at a high frequency. Conversely, the indicator light is green. In step S6, the position coordinates of the main vessel are obtained by real-time positioning, and the distance from the side of the main vessel to the wind turbine is calculated. When the distance is less than the third warning value, the audible and visual alarm will sound an alarm. The alarm is divided into level 1 alarm and level 2 alarm. In level 1 alarm, the indicator light is yellow, an alarm sound is emitted and flashes at a low frequency. In level 2 alarm, the indicator light is red, an alarm sound is emitted and flashes at a high frequency. Conversely, the indicator light is green.

2. A ship anchorage monitoring system for performing the ship anchorage monitoring method as described in claim 1, characterized in that, include: Anchored end: The first satellite receiver is used to locate the position of the anchored ship in real time. The data radio is used to send the location of the anchored vessel to the monitoring module; A rotation sensor, installed on the anchor, is used to monitor the number of rotations of the anchor when it is dropped, thereby obtaining the length of the anchor cable when it is pulled up or down. Main ship end: The second satellite receiver is used to locate the main vessel's position in real time. The third satellite receiver is used to receive the accurate location of each submarine cable and wind turbine; The monitoring module is used to monitor the position of the main vessel and anchor in real time; The early warning module is used to determine the distance between the main vessel and the wind turbine, and between the anchor and the submarine cable, and to trigger an alarm when a certain limit is reached. The storage module is used to store positioning data of the anchored vessel, the main vessel, the submarine cable, and the wind turbine, as well as rotation sensor data.

3. The ship anchorage monitoring system according to claim 2, characterized in that, The monitoring module includes: A GPS handheld device is used to determine the anchor position before anchoring, based on the ship's position, and to locate the anchor position after calculating the anchor coordinates. The anchor-to-submarine cable distance acquisition unit is used to obtain the actual position of the anchor by using the positions of the main vessel, the anchored vessel, and the length of the anchor cable, and then to obtain the distance from the anchor to the submarine cable. The main vessel wind turbine distance acquisition unit is used to obtain the distance from the main vessel to the wind turbine by locating the position of the main vessel and the position of the wind turbine in real time; The display unit is used to display the relative positions of the ship, wind turbine, anchor, and submarine cable in real time in a two-dimensional plane.

4. The ship anchorage monitoring system according to claim 2, characterized in that, The early warning module includes: The anchor dragging alarm unit calculates the distance by using the coordinates of the four corner points of the main vessel and the coordinates of the corresponding anchor dropping points. It obtains the length of the anchor cable through the rotation sensor and issues an alarm when the length of the anchor cable is less than the calculated distance and reaches the first warning value. The anchor-to-submarine-cable alarm unit calculates the anchor's position coordinates in real time by using the coordinates of the four corner points of the main vessel, the direction of the corresponding anchoring vessel, and the length of the anchor cable. It also calculates the shortest distance from the anchor point to the submarine cable and issues an alarm when the distance is less than the second warning value. The main vessel collision alarm unit obtains the position coordinates of the main vessel in real time, calculates the distance from the side of the vessel to the wind turbine, and issues an alarm when the distance is less than the third warning value.

5. A ship anchorage monitoring system according to claim 4, characterized in that, The anchor dragging alarm unit, the anchor hitting the submarine cable alarm unit, and the main vessel hitting the wind turbine alarm unit are all equipped with two levels for the first warning value, the second warning value, and the third warning value, namely Level 1 alarm and Level 2 alarm.

6. A ship anchorage monitoring system according to claim 5, characterized in that, The early warning module also includes: Three audible and visual alarms are used for alarm processing of the anchor dragging alarm unit, the anchor hitting the submarine cable alarm unit, and the main vessel hitting the wind turbine alarm unit, respectively.

7. A ship anchorage monitoring system according to claim 6, characterized in that, The audible and visual alarm includes three indicator lights: red, yellow, and green. When the red indicator light is on, it indicates a level 2 alarm; when the yellow indicator light is on, it indicates a level 1 alarm; and when the green indicator light is on, it indicates a normal state.

8. A ship anchorage monitoring system according to claim 7, characterized in that, When the audible and visual alarm sounds, it can be canceled by the anchor dragging alarm unit, the anchor hitting the submarine cable alarm unit, or the main vessel hitting the wind turbine alarm unit, or by unplugging the power cord of the audible and visual alarm.

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