LNG transport ship gas test adjusting system based on big data

Abstract

The invention discloses an LNG transport ship gas test adjusting system based on big data, comprising an LNG gas test adjusting method based on big data, and the LNG gas test adjusting method comprises the following steps: monitoring the process that an LNG transport ship arrives at a refueling ship for gas test; constructing a filling ship dynamic cruise monitoring network; determining a filling ship and analyzing a specific navigation route; according to the method, the positions of the filling ships are monitored in the filling ship dynamic cruise monitoring network, the filling ship most suitable for filling is obtained through screening on the basis of detection of the time when the LNG transport ship travels to the filling ship, the monitoring accuracy of the gas test adjusting system is improved, and the gas test adjusting efficiency is improved. The working pressure of a filling ship in a sea area is reduced; by establishing the cruise monitoring network, the positions of the filling ships in the area are monitored in real time, the distribution positions of the filling ships in the area are determined in real time, and the method has the advantages of being high in navigation monitoring capacity and high in gas test process completing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of gas trial sailing process regulation for LNG carriers, and in particular to a gas trial sailing regulation system for LNG carriers based on big data. Background Art

[0002] LNG carriers are an important tool for transporting liquefied natural gas and play a vital role in the global energy market. As the global demand for clean energy continues to grow, the development prospects of LNG carriers are becoming increasingly bright.

[0003] After the construction of LNG carriers is completed, the gas trial period is long, and it is necessary to stop at the LNG shore station twice, which takes up a long time at the shore station and affects the regular work plan of the shore station. In the prior art, LNG carriers conduct gas trials on carriers through bunkering ships, and the bunkering ships sail to the required position to dock with the LNG carriers for transmission pipelines and conduct gas trials. However, when LNG carriers select bunkering ship targets in the sea area, different LNG carriers have different loading capacities for liquefied natural gas, and some bunkering ships cannot meet the gas trial standards of LNG carriers, especially during the peak period of bunkering ship operations in the sea area. The gas trial adjustment system cannot quickly match the appropriate bunkering ship for gas trial according to navigation; at the same time, since the load test and barge test of LNG carriers both require the preheating of the power generation equipment of LNG carriers, too short preheating will cause the preheating of the power generation equipment of LNG carriers to fail to meet the expected standards, resulting in a delay in the gas trial process of LNG carriers. Therefore, it is very necessary to design a gas trial adjustment system for LNG carriers based on big data with strong navigation monitoring capabilities and high efficiency in gas trial process completion. Summary of the invention

[0004] The object of the present invention is to provide a gas test regulation system for LNG carriers based on big data to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a gas test adjustment system for an LNG carrier based on big data, including a LNG gas test adjustment method based on big data, the LNG gas test adjustment method comprising the following steps: Step S1: Connecting the LNG gas test regulation system on the LNG carrier to continuously monitor the process of the LNG carrier arriving at the bunkering ship for gas test; Step S2: construct a dynamic cruise monitoring network for bunkering ships in the coastal waters to monitor the location of the bunkering ships in the monitoring network in real time; Step S3: According to the location and working status of the bunkering ship in the constructed dynamic cruise monitoring network of the bunkering ship, the target bunkering ship is determined and the specific navigation route is analyzed; Step S4: The LNG carrier arrives at the target bunkering ship, conducts a gas test and returns after completing the gas test.

[0006] According to the above technical solution, step S2 includes: Step S21: Navigation systems are installed on all bunkering ships cruising around the bunkering ships, and the positions of adjacent bunkering ships are determined by positioning modules in their respective navigation systems. The master control terminal on the coast receives the position data information sent by the navigation systems of each bunkering ship, retrieves the coastal model and coastal cruise distribution model of the coast in the database, and calibrates the specific positions of all bunkering ships in the distribution model according to the position data information sent by the navigation systems of the bunkering ships, so as to form a dynamic cruise monitoring network for bunkering ships; Step S22: A navigation system is installed on a bunkering ship cruising around the coast. In a circular sea area with the bunkering ship as the center and the average distance between the bunkering ship and other nearby bunkering ships as the radius, the navigation system detects the LNG tanker entering the bunkering ship detection circular sea area. If a new LNG tanker is detected entering the circular sea area corresponding to the bunkering ship, the start-up information is transmitted to the communication equipment in the LNG tanker through the communication equipment equipped on the bunkering ship. When the communication equipment of the LNG tanker receives the prompt start-up information, the gas test adjustment system in the LNG tanker is synchronously started.

[0007] According to the above technical solution, step S3 includes: Step S31: The LNG tanker navigation system receives the dynamic cruise monitoring network of the bunkering ship sent from the coastal master control terminal, and marks the position of its own ship in the sea map, wherein the navigation system marks the distribution area of ​​the bunkering cruise monitoring network in the sea map. When the LNG tanker navigation system detects that the position of its own ship enters the bunkering cruise monitoring network, the gas test adjustment system retrieves the data information of the LNG tanker and each bunkering ship loaded with fuel stored in the master control terminal database, matches the bunkering ship with the target LNG tanker, and obtains the corresponding n bunkering ships whose bunkering amount is higher than the bunkering standard of the LNG tanker and is not in the bunkering state; Step S32: sequentially obtain the travel distances L1, L2, ..., Ln between the n bunkering ships and the current position of the LNG tanker. The time required for the LNG tanker to travel at a normal speed in the direction of the bunkering ship it is always heading towards is t1, t2, ..., tn respectively. The minimum time required for the gas test cabin of the LNG tanker to be preheated before the gas test is t00. The minimum preheating time t0 is compared with the gas test rated time t01 obtained by the system in the database to obtain the comparison time t02. The time value whose difference between the time required for the LNG tanker to travel at a normal speed and the comparison time is positive and closest to 0 is selected, and the bunkering ship corresponding to the time value is selected and marked as the target bunkering ship.

[0008] According to the above technical solution, in step S32, the method for detecting the current travel distance between the bunkering ship and the LNG carrier is specifically as follows: Step S321: In the acquired dynamic cruise monitoring network of the bunkering ship, the circular area range of the bunkering ship is obtained in turn, and after locking the position of the LNG tanker, the working bunkering ship is set as a fixed target, and the other bunkering ships are set as mobile targets. A virtual driving route is built in the dynamic cruise monitoring network, and two tangents are drawn from the LNG tanker as the initial point to the circular area of ​​the fixed target bunkering ship, and one of the tangents is selected as the actual driving direction. Among them, the method for selecting the tangent of the LNG tanker along the circular area of ​​a single fixed target bunkering ship is specifically as follows: in the navigation monitoring area with the bunkering ship circular area as the same center and a radius twice that of the circular area, the length of the perpendicular line from the other bunkering ships in the navigation monitoring area to the tangent and the smaller corresponding tangent; Step S322: After passing the estimated tangent point and avoiding the moving target bunkering ship, continue driving until reaching the course change point detected by the system, and then drive again toward the tangent line of the circular area of ​​the fixed target bunkering ship that is closer to the target bunkering ship.

[0009] According to the above technical solution, in step S322, the method for detecting the navigation change point is specifically as follows: Step S3221: retrieve the current driving direction information of the bunkering ship in the navigation monitoring area, output the current command for controlling the navigation of the bunkering ship according to the driving direction of the bunkering ship and the control terminal in the bunkering ship, predict the navigation track of the bunkering ship, and draw the predicted navigation track of the current bunkering ship and the intersection point of the tangent in the dynamic cruise monitoring network; Step S3222: According to the navigation speed information of the bunkering ship and the current LNG carrier uploaded to the master control terminal, the time t1 required for the current LNG carrier to navigate to the intersection point according to the current tangent direction and the time t2 required for the bunkering ship to navigate to the intersection point according to the current predicted navigation trajectory are obtained. If t1<t2, the navigation change point is set after the intersection point; if t1≥t2, the navigation change point is set before the intersection point; Step S3223: If the system detects that the set navigation change point is after the intersection point, repeat this step until the system detects that the set navigation change point is before the intersection point, and detects the distance between the navigation change point and the previous intersection point, and the distance between the navigation change point and the tangent point. , where r is the average value of the distance between the current bunkering ship and other nearby bunkering ships detected by the system in step S22, K is the fuel capacity actually consumed by the LNG tanker between two adjacent navigation change points, K is the total fuel energy required by the LNG tanker to complete the gas test process obtained by the system, L is the navigation change point that the LNG tanker has passed, and η is the influence factor of the driving distance on the gas test process of the LNG tanker.

[0010] According to the above technical solution, step S4 includes: Step S41: When the LNG carrier arrives at the target bunkering ship and completes the gas test pipeline docking operation, the control terminal on the target bunkering ship starts the gas test process; Step S42: After the LNG carrier completes the gas test process, according to the navigation monitoring route of step S3, the carrier returns along the mirror image path while avoiding the circular area of ​​the bunkering ship in step S3.

[0011] According to the above technical solution, the gas trial adjustment system of the LNG tanker includes a data acquisition module, a gas trial route adjustment module and a navigation control module. The data acquisition module is used to obtain data information of the gas trial ship and equipment on the coast; the gas trial route adjustment module is used to obtain the route of the LNG tanker during the gas trial from the LNG tanker to the target bunkering ship position for analysis and adjustment; the navigation control module is used to control the LNG tanker to conduct a trial voyage according to the route through instructions.

[0012] According to the above technical solution, the data acquisition module includes a gas test equipment ship information collection module and a coastal master control module. The gas test equipment ship information collection module is used to collect the hull information of the built LNG transport ships and bunkering ships stored in the database; the coastal master control module is used to collect the data stored in the master control terminal on the coast where the bunkering ship is traveling.

[0013] According to the above technical solution, the gas test route adjustment module includes a cruise monitoring network construction module and a gas test route analysis module. The cruise monitoring network construction module is used to build a dynamic cruise monitoring network for bunkering ships in the sea area near the coast, and detect the driving positions of bunkering ships and target LNG tankers in the sea area; the gas test route analysis module is used to adjust and analyze the navigation status of the LNG tanker on the route of the target bunkering ship.

[0014] According to the above technical solution, the gas test route analysis module includes a navigation direction adjustment submodule and a navigation change point detection submodule. The navigation direction adjustment submodule is used to adjust the navigation direction of the LNG tanker in real time during navigation; the navigation direction change point detection submodule is used to detect the most reasonable navigation direction change point position in the area where the LNG tanker is sailing through different mobile bunkering ship trajectories.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention monitors the position of the bunkering ship in the dynamic cruise monitoring network of the bunkering ship, and screens out the most suitable bunkering ship based on the time detection of the LNG tanker traveling to the bunkering ship, thereby greatly improving the monitoring accuracy of the gas test adjustment system and reducing the working pressure of the bunkering ships in the sea area; by establishing a cruise monitoring network, the position of the bunkering ship in the area is monitored in real time, and the distribution position of the bunkering ships in the area is known in real time, which provides a favorable basis for navigating the LNG tanker to the target bunkering ship; through this technical solution, it is possible to avoid to the greatest extent the mobile target bunkering ship blocking the navigation of the LNG tanker or causing the danger of navigation collision; by retrieving the distance information of the LNG tanker when sailing to the target bunkering ship, it is possible to avoid to the greatest extent the safety problems that may arise in the transportation and subsequent sea trials of the LNG tanker. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a flow chart of a method for operating a gas test adjustment system of an LNG carrier based on big data provided by an embodiment of the present invention; Figure 2 It is a schematic diagram of the module composition of a gas test and regulation system for an LNG carrier based on big data provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1 The embodiment of the present invention provides a technical solution: a gas test adjustment system for an LNG carrier based on big data, including a LNG gas test adjustment method based on big data, the LNG gas test adjustment method comprising the following steps: Step S1: Connecting the LNG gas test regulation system on the LNG carrier to continuously monitor the process of the LNG carrier arriving at the bunkering ship for gas test; Step S2: construct a dynamic cruise monitoring network for bunkering ships in the coastal waters to monitor the location of the bunkering ships in the monitoring network in real time; Step S3: According to the location and working status of the bunkering ship in the constructed dynamic cruise monitoring network of the bunkering ship, the target bunkering ship is determined and the specific navigation route is analyzed; Step S4: The LNG carrier arrives at the target bunkering ship, conducts a gas test and returns after completing the gas test.

[0019] The embodiments of the present invention monitor the positions of the bunkering ships in the dynamic cruise monitoring network of the bunkering ships, and screen out the most suitable bunkering ships for bunkering based on the time detection of the LNG tanker traveling to the bunkering ships, thereby greatly improving the monitoring accuracy of the gas test adjustment system and reducing the working pressure of the bunkering ships in the sea area; by establishing a cruise monitoring network, the positions of the bunkering ships in the area are monitored in real time, and the distribution positions of the bunkering ships in the area are known in real time, which provides a favorable basis for navigating the LNG tanker to the target bunkering ship; through this technical solution, it is possible to avoid to the greatest extent the mobile target bunkering ship blocking the navigation of the LNG tanker or causing the danger of navigation collision; by retrieving the distance information of the LNG tanker to the target bunkering ship during navigation, it is possible to avoid to the greatest extent the safety problems that may occur in the transportation and subsequent sea trials of the LNG tanker.

[0020] In a preferred embodiment, step S2 comprises: Step S21: Navigation systems are installed on all bunkering ships cruising around the bunkering ships, and the positions of adjacent bunkering ships are determined by positioning modules in their respective navigation systems. The master control terminal on the coast receives the position data information sent by the navigation systems of each bunkering ship, retrieves the coastal model and coastal cruise distribution model of the coast in the database, and calibrates the specific positions of all bunkering ships in the distribution model according to the position data information sent by the navigation systems of the bunkering ships, so as to form a dynamic cruise monitoring network for bunkering ships; Step S22: A navigation system is installed on a bunkering ship cruising around the coast. In a circular sea area with the bunkering ship as the center and the average distance between the bunkering ship and other nearby bunkering ships as the radius, the navigation system detects the LNG tanker entering the bunkering ship detection circular sea area. If a new LNG tanker is detected entering the circular sea area corresponding to the bunkering ship, the start-up information is transmitted to the communication equipment in the LNG tanker through the communication equipment equipped on the bunkering ship. When the communication equipment of the LNG tanker receives the prompt start-up information, the gas test adjustment system in the LNG tanker is synchronously started.

[0021] In a preferred embodiment, step S3 includes: Step S31: The LNG tanker navigation system receives the dynamic cruise monitoring network of the bunkering ship sent from the coastal master control terminal, and marks the position of its own ship in the sea map, wherein the navigation system marks the distribution area of ​​the bunkering cruise monitoring network in the sea map. When the LNG tanker navigation system detects that the position of its own ship enters the bunkering cruise monitoring network, the gas test adjustment system retrieves the data information of the LNG tanker and each bunkering ship loaded with fuel stored in the master control terminal database, matches the bunkering ship with the target LNG tanker, and obtains the corresponding n bunkering ships whose bunkering amount is higher than the bunkering standard of the LNG tanker and is not in the bunkering state; Step S32: sequentially obtain the travel distances L1, L2, ..., Ln between the n bunkering ships and the current position of the LNG tanker. The time required for the LNG tanker to travel at a normal speed in the direction of the bunkering ship it is always heading towards is t1, t2, ..., tn respectively. The minimum time required for the gas test cabin of the LNG tanker to be preheated before the gas test is t00. The minimum preheating time t0 is compared with the gas test rated time t01 obtained by the system in the database to obtain the comparison time t02. The time value whose difference between the time required for the LNG tanker to travel at a normal speed and the comparison time is positive and closest to 0 is selected, and the bunkering ship corresponding to the time value is selected and marked as the target bunkering ship.

[0022] After the natural gas is added to the cargo tank, the dual-fuel generator needs to be debugged in gas mode and load tested to verify the equipment function in gas mode; at the same time, the gas test also needs to complete the ship-to-ship communication between the LNG ship and the bunkering ship and the liquefied natural gas transfer test. The load test and transfer test of the LNG carrier have certain requirements for the preheating completion of the LNG carrier's power generation equipment. If the LNG carrier's sailing distance is decisive, the preheating of the LNG carrier's power generation equipment may not meet the expected standards, resulting in delays in the LNG carrier's gas test process.

[0023] This technical solution solves the problem that during the peak working period of bunkering ships in the sea area, the master control terminal cannot take into account the preheating of LNG tankers while ensuring that the LNG tankers can reach the target bunkering ships as quickly as possible. By monitoring the position of the bunkering ship in the dynamic cruise monitoring network of the bunkering ship, the most suitable bunkering ship is selected based on the time detection of the LNG tanker traveling to the bunkering ship, which greatly improves the monitoring accuracy of the gas test adjustment system and reduces the working pressure of the bunkering ships in the sea area.

[0024] In step S32 of this embodiment, the method for detecting the current travel distance between the bunkering ship and the LNG carrier is specifically as follows: Step S321: In the acquired dynamic cruise monitoring network of the bunkering ship, the circular area range of the bunkering ship is obtained in turn, and after locking the position of the LNG tanker, the working bunkering ship is set as a fixed target, and the other bunkering ships are set as mobile targets. A virtual driving route is built in the dynamic cruise monitoring network, and two tangents are drawn from the LNG tanker as the initial point to the circular area of ​​the fixed target bunkering ship, and one of the tangents is selected as the actual driving direction. Among them, the method for selecting the tangent of the LNG tanker along the circular area of ​​a single fixed target bunkering ship is specifically as follows: in the navigation monitoring area with the bunkering ship circular area as the same center and a radius twice that of the circular area, the length of the perpendicular line from the other bunkering ships in the navigation monitoring area to the tangent and the smaller corresponding tangent; Step S322: After passing the estimated tangent point and avoiding the moving target bunkering ship, continue driving until reaching the course change point detected by the system, and then drive again toward the tangent line of the circular area of ​​the fixed target bunkering ship that is closer to the target bunkering ship.

[0025] This technical solution solves the problem that during the peak period of bunkering ship loading, the LNG carrier built on the coast cannot quickly find a suitable bunkering ship for gas testing. By establishing a cruise monitoring network, the location of bunkering ships in the area is monitored in real time, and the distribution location of bunkering ships in the area is known in real time, providing a favorable basis for navigating LNG carriers to target bunkering ships.

[0026] In step S322 of this embodiment, the method for detecting the navigation change point is specifically as follows: Step S3221: retrieve the current driving direction information of the bunkering ship in the navigation monitoring area, output the current command for controlling the navigation of the bunkering ship according to the driving direction of the bunkering ship and the control terminal in the bunkering ship, predict the navigation track of the bunkering ship, and draw the predicted navigation track of the current bunkering ship and the intersection point of the tangent in the dynamic cruise monitoring network; Step S3222: According to the navigation speed information of the bunkering ship and the current LNG carrier uploaded to the master control terminal, the time t1 required for the current LNG carrier to navigate to the intersection point according to the current tangent direction and the time t2 required for the bunkering ship to navigate to the intersection point according to the current predicted navigation trajectory are obtained. If t1<t2, the navigation change point is set after the intersection point; if t1≥t2, the navigation change point is set before the intersection point; Step S3223: If the system detects that the set navigation change point is after the intersection point, repeat this step until the system detects that the set navigation change point is before the intersection point, and detects the distance between the navigation change point and the previous intersection point, and the distance between the navigation change point and the tangent point. , where r is the average value of the distance between the current bunkering ship and other nearby bunkering ships detected by the system in step S22, K is the actual fuel capacity consumed by the LNG tanker between two adjacent navigation change points, K is the total fuel energy required by the LNG tanker to complete the gas test process obtained by the system, L is the navigation change point that the LNG tanker has passed, and η is the influence factor of the driving distance on the gas test process of the LNG tanker.

[0027] The factors affecting the sailing distance are: whether the energy used by the bunkering ship to refuel the transport ship can be completely consumed during the sea trial. In a single area, the longer the LNG transport ship sails, the more energy it needs to consume on the final return voyage. The energy required is related to the size of the transport ship itself.

[0028] Through this technical solution, it is possible to avoid to the greatest extent the risk of a mobile target bunkering ship blocking the navigation of an LNG transport ship or causing a navigation collision.

[0029] In a preferred embodiment, step S4 comprises: Step S41: When the LNG carrier arrives at the target bunkering ship and completes the gas test pipeline docking operation, the control terminal on the target bunkering ship starts the gas test process; Step S42: After the LNG carrier completes the gas test process, according to the navigation monitoring route of step S3, the carrier returns along the mirror image path while avoiding the circular area of ​​the bunkering ship in step S3.

[0030] Furthermore, the method of using a bunkering ship to conduct a gas test on an LNG carrier is specifically as follows: dry air is used to dry the liquid cargo tank of the LNG carrier during the berthing stage at the construction terminal; after the dry air drying of the liquid cargo tank is completed, the liquid cargo tank is inerted with inert gas; after inerting, an LNG bunkering ship is used to replace the LNG carrier, and all liquid cargo tanks of the LNG carrier are cooled; after the cooling treatment of the liquid cargo tank is completed, the LNG bunkering ship is used to add gas to the No. 4 liquid cargo tank to consume the natural gas required for the sea trial; after the natural gas in the liquid cargo tank is added, the equipment function in the gas mode is verified, the dual-fuel generator is debugged in gas mode, and a load test is carried out; the LNG ship and the bunkering ship conduct ship-to-ship communication and liquefied natural gas transfer tests, and after the transfer test is completed, the LNG ship leaves the LNG bunkering ship for a sea trial, completing the sea trial of the LNG ship.

[0031] This technical solution solves the problem that when the LNG carrier is sailing to the bunkering ship, the internal heat energy release of the LNG carrier may be insufficient, and the LNG carrier's own fuel carrying capacity is insufficient when the bunkering ship delivers fuel to the LNG carrier, which may lead to safety risks during the gas test of the LNG carrier. By retrieving the distance information of the LNG carrier to the target bunkering ship during the voyage and adjusting the speed of the bunkering ship delivering natural gas to the LNG carrier, it is possible to avoid the possible safety problems of the delivery and the subsequent sea trials of the LNG carrier to the greatest extent. At the same time, by returning according to the mirror path, the sea trial process of the LNG carrier can be kept consistent with the fuel energy consumed by sailing from the coast to the target bunkering ship, so that the two round trips of the LNG carrier between the coast and the target bunkering ship can be compared, which provides effective assistance for the inspection of the gas test process.

[0032] The gas trial adjustment system for LNG tankers includes a data acquisition module, a gas trial route adjustment module and a navigation control module. The data acquisition module is used to obtain data information of the gas trial ship and equipment on the coast; the gas trial route adjustment module is used to obtain the route of the LNG tanker during the gas trial from the LNG tanker to the target bunkering ship position for analysis and adjustment; the navigation control module is used to control the LNG tanker to conduct a trial voyage according to the route through instructions.

[0033] The data acquisition module includes a gas test equipment ship information collection module and a coastal master control module. The gas test equipment ship information collection module is used to collect the hull information of the built LNG transport ships and bunkering ships stored in the database; the coastal master control module is used to collect the data stored in the master control terminal on the coast where the bunkering ship is traveling.

[0034] The gas test route adjustment module includes a cruise monitoring network construction module and a gas test route analysis module. The cruise monitoring network construction module is used to build a dynamic cruise monitoring network for bunkering ships in the sea area near the coast, and detect the driving positions of bunkering ships and target LNG tankers in the sea area; the gas test route analysis module is used to adjust and analyze the navigation status of the LNG tanker on the route to the target bunkering ship.

[0035] The gas trial route analysis module includes a navigation direction adjustment submodule and a navigation change point detection submodule. The navigation direction adjustment submodule is used to adjust the navigation direction of the LNG tanker in real time during navigation; the navigation direction change point detection submodule is used to detect the most reasonable navigation direction change point position in the area where the LNG tanker passes through different mobile bunkering ship trajectories.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gas test and regulation system for LNG carriers based on big data, characterized in that: A LNG gas test adjustment method based on big data is included, and the LNG gas test adjustment method includes the following steps: Step S1: Connecting the LNG gas test regulation system on the LNG carrier to continuously monitor the process of the LNG carrier arriving at the bunkering ship for gas test; Step S2: construct a dynamic cruise monitoring network for bunkering ships in the coastal waters to monitor the location of the bunkering ships in the monitoring network in real time; Step S3: According to the location and working status of the bunkering ship in the constructed bunkering ship dynamic cruise monitoring network, determine the target bunkering ship and analyze the specific navigation route; Obtain the corresponding n bunkering ships whose bunkering amount is higher than the bunkering standard of the LNG carrier and are not in the bunkering state; The driving distances L1, L2, ..., Ln between the n bunkering ships and the current position of the LNG carrier are obtained in sequence. The time required for the LNG carrier to travel at a normal speed in the direction of the bunkering ship it is always facing is t1, t2, ..., tn respectively. The minimum time required for the gas test cabin of the LNG carrier to be preheated before the gas test is t00. The minimum preheating time t0 is compared with the gas test rated time t01 obtained by the system in the database to obtain the comparison time t02. The time value whose difference between the time required for the LNG carrier to travel at a normal speed and the comparison time is positive and closest to 0 is selected, and the bunkering ship corresponding to the time value is selected and marked as the target bunkering ship; Step S4: The LNG carrier arrives at the target bunkering ship, conducts a gas test and returns after completing the gas test.

2. The LNG carrier gas test and adjustment system based on big data according to claim 1 is characterized by: The step S2 comprises: Step S21: Navigation systems are installed on all bunkering ships cruising around the bunkering ships, and the positions of adjacent bunkering ships are determined by positioning modules in their respective navigation systems. The master control terminal on the coast receives the position data information sent by the navigation systems of each bunkering ship, retrieves the coastal model and coastal cruise distribution model of the coast in the database, and calibrates the specific positions of all bunkering ships in the distribution model according to the position data information sent by the navigation systems of the bunkering ships, so as to form a dynamic cruise monitoring network for bunkering ships; Step S22: A navigation system is installed on a bunkering ship cruising around the coast. In a circular sea area with the bunkering ship as the center and the average distance between the bunkering ship and other nearby bunkering ships as the radius, the navigation system detects the LNG tanker entering the bunkering ship detection circular sea area. If a new LNG tanker is detected entering the circular sea area corresponding to the bunkering ship, the start-up information is transmitted to the communication equipment in the LNG tanker through the communication equipment equipped on the bunkering ship. When the communication equipment of the LNG tanker receives the prompt start-up information, the gas test adjustment system in the LNG tanker is synchronously started.

3. The LNG carrier gas test and adjustment system based on big data according to claim 2 is characterized by: The step S3 comprises: Step S31: The LNG tanker navigation system receives the dynamic cruise monitoring network of the bunkering ship sent from the coastal master control terminal, and marks the position of its own ship in the sea area map, wherein the navigation system marks the distribution area of ​​the bunkering cruise monitoring network in the sea area map. When the LNG tanker navigation system detects that the position of its own ship enters the bunkering cruise monitoring network, the gas test adjustment system retrieves the data information of the LNG tanker and each bunkering ship loaded with fuel stored in the master control terminal database, and matches the bunkering ship with the target LNG tanker.

4. The LNG carrier gas test and adjustment system based on big data according to claim 3 is characterized by: In step S32, the method for detecting the current travel distance between the bunkering ship and the LNG carrier is specifically as follows: Step S321: In the acquired dynamic cruise monitoring network of the bunkering ship, the circular area range of the bunkering ship is obtained in turn, and after locking the position of the LNG tanker, the working bunkering ship is set as a fixed target, and the other bunkering ships are set as mobile targets. A virtual driving route is built in the dynamic cruise monitoring network, and two tangents are drawn from the LNG tanker as the initial point to the circular area of ​​the fixed target bunkering ship, and one of the tangents is selected as the actual driving direction. Among them, the method for selecting the tangent of the LNG tanker along the circular area of ​​a single fixed target bunkering ship is specifically as follows: in the navigation monitoring area with the bunkering ship circular area as the same center and a radius twice that of the circular area, the length of the perpendicular line from the other bunkering ships in the navigation monitoring area to the tangent and the smaller corresponding tangent; Step S322: After passing the estimated tangent point and avoiding the moving target bunkering ship, continue driving until reaching the course change point detected by the system, and then drive again toward the tangent line of the circular area of ​​the fixed target bunkering ship that is closer to the target bunkering ship.

5. The LNG carrier gas test and adjustment system based on big data according to claim 4 is characterized in that: In step S322, the method for detecting the navigation change point is specifically as follows: Step S3221: retrieve the current driving direction information of the bunkering ship in the navigation monitoring area, output the current command for controlling the navigation of the bunkering ship according to the driving direction of the bunkering ship and the control terminal in the bunkering ship, predict the navigation track of the bunkering ship, and draw the predicted navigation track of the current bunkering ship and the intersection point of the tangent in the dynamic cruise monitoring network; Step S3222: According to the navigation speed information of the bunkering ship and the current LNG carrier uploaded to the master control terminal, the time t1 that the current LNG carrier needs to sail to the intersection point according to the current tangent direction and the time t2 that the bunkering ship needs to sail to the intersection point according to the current predicted navigation trajectory are obtained. If t1<t2, the navigation change point is set after the intersection point; If t1 ≥ t2, set the navigation change point before the intersection point; Step S3223: If the system detects that the set navigation change point is after the intersection point, repeat this step until the system detects that the set navigation change point is before the intersection point, and detects the distance between the navigation change point and the previous intersection point, and the distance between the navigation change point and the tangent point. , where r is the average value of the distance between the current bunkering ship and other nearby bunkering ships detected by the system in step S22, K is the fuel capacity actually consumed by the LNG tanker between two adjacent navigation change points, K is the total fuel energy required by the LNG tanker to complete the gas test process obtained by the system, L is the navigation change point that the LNG tanker has passed, and η is the influence factor of the driving distance on the gas test process of the LNG tanker.

6. The LNG carrier gas test and adjustment system based on big data according to claim 5 is characterized by: The step S4 comprises: Step S41: When the LNG carrier arrives at the target bunkering ship and completes the gas test pipeline docking operation, the control terminal on the target bunkering ship starts the gas test process; Step S42: After the LNG carrier completes the gas test process, according to the navigation monitoring route of step S3, the carrier returns along the mirror image path while avoiding the circular area of ​​the bunkering ship in step S3.

7. The LNG carrier gas test and adjustment system based on big data according to claim 6 is characterized by: The LNG carrier gas test regulation system includes a data acquisition module, a gas test route regulation module and a navigation control module. The data acquisition module is used to obtain data information of the gas test ship and equipment on the coast; The gas trial route adjustment module is used to obtain the route of the LNG tanker during the gas trial from the LNG tanker to the target bunkering ship position for analysis and adjustment; the navigation control module is used to control the LNG tanker to conduct a trial voyage according to the route through instructions.

8. The LNG carrier gas test and adjustment system based on big data according to claim 7 is characterized by: The data acquisition module includes a gas test equipment ship information collection module and a coastal master control module. The gas test equipment ship information collection module is used to collect the hull information of the built LNG transport ship and bunkering ship stored in the database; the coastal master control module is used to collect the data stored in the master control terminal on the coast where the bunkering ship is traveling.

9. The LNG carrier gas test and adjustment system based on big data according to claim 8, characterized in that: The gas test route adjustment module includes a cruise monitoring network construction module and a gas test route analysis module. The cruise monitoring network construction module is used to build a dynamic cruise monitoring network for bunkering ships in the sea area near the coast to detect the driving positions of bunkering ships and target LNG transport ships in the sea area; the gas test route analysis module is used to adjust and analyze the navigation status of the LNG transport ship on the route of the target bunkering ship.

10. The LNG carrier gas test and adjustment system based on big data according to claim 9, characterized in that: The gas trial route analysis module includes a navigation direction adjustment submodule and a navigation change point detection submodule. The navigation direction adjustment submodule is used to adjust the navigation direction of the LNG tanker in real time during navigation; the navigation direction change point detection submodule is used to detect the most reasonable navigation direction change point position when the LNG tanker sails through the area where different mobile bunkering ship trajectories are located.

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