CN114044110B - Method and system for judging loading and unloading working conditions of LNG (liquefied Natural gas) transport ship - Google Patents
Method and system for judging loading and unloading working conditions of LNG (liquefied Natural gas) transport ship Download PDFInfo
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Abstract
The invention provides a method and a system for judging loading and unloading working conditions of an LNG transport ship, comprising the following steps: acquiring the running state of a propeller of the LNG transport ship; judging whether the LNG transport ship is in a maneuvering condition or not based on the operation state; if not, acquiring distance information between the LNG transport ship and the destination port; acquiring a standard deviation and a variable quantity of a cargo tank liquid level of an LNG transport ship in a preset period; judging the target working condition of the LNG transport ship based on the distance information, the standard deviation and the variation; the target operating condition includes any one of: loading working condition and unloading working condition. The invention solves the technical problem that in the prior art, the safety management is difficult for managers to carry out loading and unloading working conditions on the liquefied natural gas transport ship through data analysis.
Description
Technical Field
The invention relates to the technical field of LNG ship working condition monitoring, in particular to a method and a system for judging loading and unloading working conditions of an LNG transport ship.
Background
At present, the operation safety of ships, especially Liquefied Natural Gas (LNG) transport ships, is receiving more and more attention, and as a dangerous cargo, during the loading and unloading process, due to the irregular operation of crew or equipment failure, the LNG is likely to cause safety accidents, which causes serious consequences. In order to facilitate remote management of a shore-based shipowner, an intelligent system is installed on an existing LNG transport ship, and real-time data of the ship, particularly data of a cargo system, are transmitted back to a shore base. Being restricted by the communication, bank base managers can't communicate with ship base personnel in real time, obtain the operating mode of boats and ships this moment, consequently in the face of the data of magnanimity retransmission to the bank base, be difficult to discern the data when belonging to LNG goods loading/uninstallation operating mode, and then lead to bank base managers to be difficult to pass through the data, carry out the security management when LNG ship loading/unloading operating mode.
Disclosure of Invention
In view of the above, the present invention provides a method and a system for determining a loading/unloading condition of an LNG carrier, so as to solve the technical problem in the prior art that it is difficult for a manager to perform safety management on a loading/unloading condition of an LNG carrier through data analysis.
In a first aspect, an embodiment of the present invention provides a method for determining a loading and unloading condition of an LNG transport ship, including: acquiring the running state of a propeller of the LNG transport ship; the operating state includes any one of: a startup state and a shutdown state; judging whether the LNG transport ship is in a maneuvering condition or not based on the running state; if not, acquiring distance information between the LNG transport ship and a destination port; acquiring a standard deviation and a variable quantity of a cargo tank liquid level of the LNG transport ship in a preset period; based on the distance information, the standard deviation and the variation, judging the target working condition of the LNG transport ship; the target operating condition includes any one of: loading working condition and unloading working condition.
Further, the propulsion of the LNG carrier includes: a main thruster and a side thruster; acquiring an operating state of a thruster of an LNG transport vessel, comprising: respectively acquiring running indication signals of the main thruster and the side thruster; the operation indication signal comprises at least one of: switching signal, power, speed, current; determining an operational state of the main thruster based on the operational indication signal of the main thruster; and determining the running state of the side propeller based on the running indication signal of the side propeller.
Further, based on the operation state, determining whether the LNG transportation vessel is in a maneuvering condition includes: judging whether the main thruster and the side thruster are both in a shutdown state; and if not, determining that the LNG transport ship is in the maneuvering condition.
Further, the method further comprises: if the running state of a propeller of the LNG transport ship cannot be determined due to loss of the running indication signal, acquiring the longitudinal ground speed of the LNG transport ship; judging whether the longitudinal ground speed is greater than a preset speed value or not; and if so, determining that the LNG transport ship is in the maneuvering condition.
Further, acquiring distance information between the LNG carrier vessel and a destination port includes: acquiring current position information of the LNG transport ship; the current position information comprises longitude and latitude of the LNG transport ship; acquiring target position information of the destination port; the target position information comprises the longitude and latitude of the destination port; calculating distance information between the LNG transport ship and the destination port by using a preset distance algorithm based on the current position information and the target position information; the preset distance algorithm comprises any one of: a great circle route algorithm and a constant direction route algorithm.
Further, acquiring a standard deviation of a cargo tank liquid level of the LNG carrier in a preset period, including: acquiring a plurality of liquid level values corresponding to a plurality of time sampling points of the liquid level of the cargo hold in the preset period; and calculating standard deviations of the plurality of liquid level values, and taking the standard deviations of the plurality of liquid level values as the standard deviations of the liquid level in the cargo hold of the LNG transport ship in a preset period.
Further, based on the distance information, the standard deviation and the variation, determining a target operating condition of the LNG carrier, including: judging whether the distance information is smaller than a preset distance or not; if so, judging whether the standard deviation is larger than a preset standard deviation value or not; if yes, judging whether the variation is larger than zero; if the variation is larger than zero, determining that the target working condition is a loading working condition; and if the variation is not larger than zero, determining the target working condition as an unloading working condition.
In a second aspect, an embodiment of the present invention further provides a system for determining a loading/unloading condition of an LNG carrier, including: the system comprises a first acquisition module, a first judgment module, a second acquisition module, a third acquisition module and a second judgment module, wherein the first acquisition module is used for acquiring the running state of a propeller of the LNG transport ship; the operating state includes any one of: a startup state and a shutdown state; the first judging module is used for judging whether the LNG transport ship is in a maneuvering condition or not based on the running state; the second acquisition module is used for acquiring distance information between the LNG transport ship and a destination port; the third acquisition module is used for acquiring a standard deviation of a cargo tank liquid level of the LNG transport ship changing in a preset period; the second judgment module is used for judging the target working condition of the LNG transport ship based on the distance information and the standard deviation; the target operating condition includes any one of: loading working condition and unloading working condition.
In a third aspect, an embodiment of the present invention further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the method according to the first aspect when executing the computer program.
In a fourth aspect, the present invention further provides a computer-readable medium having non-volatile program code executable by a processor, where the program code causes the processor to execute the method according to the first aspect.
The embodiment of the invention provides a method and a system for judging the loading and unloading working condition of an LNG (liquefied natural gas) transport ship, which can accurately judge the loading and unloading working condition of the LNG transport ship through comprehensive judgment on the maneuvering working condition of the LNG transport ship, the distance information between the LNG transport ship and a destination port and the standard deviation and the variable quantity of the cargo tank liquid level of the LNG transport ship in a preset period, so that a shore-based manager can realize the safety management of the LNG transport ship through other data in the loading and unloading working condition time range, and the technical problem of safety management when the manager difficultly analyzes the loading and unloading working condition of the LNG transport ship through data in the prior art is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a method for determining a loading/unloading condition of an LNG carrier according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for determining a target operating condition according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a system for determining a loading/unloading condition of an LNG carrier according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
fig. 1 is a flowchart of a method for determining a loading/unloading condition of an LNG carrier according to an embodiment of the present invention. As shown in fig. 1, the method specifically includes the following steps:
step S102, acquiring the running state of a propeller of the LNG transport ship; the operating state includes any one of: a power-on state and a power-off state.
And step S104, judging whether the LNG transport ship is in a maneuvering condition or not based on the running state. If yes, returning to the step S102; if not, step S106 is performed.
And S106, obtaining distance information between the LNG transport ship and the destination port.
And S108, acquiring a standard deviation and a variable quantity of the liquid level of the cargo hold of the LNG transport ship in a preset period.
Step S110, judging the target working condition of the LNG transport ship based on the distance information, the standard deviation and the variation; the target operating condition includes any one of: loading working condition and unloading working condition.
The embodiment of the invention provides a method for judging the loading and unloading working condition of an LNG transport ship, which can accurately judge the loading and unloading working condition of the LNG transport ship by comprehensively judging the maneuvering working condition of the LNG transport ship, the distance information between the LNG transport ship and a destination port and the standard deviation and the variable quantity of the cargo space liquid level of the LNG transport ship in a preset period, so that a shore-based manager can realize the safety management of the LNG transport ship through other data in the time range of the loading and unloading working condition, and the technical problem that the manager is difficult to carry out the safety management on the loading and unloading working condition of the LNG transport ship through data analysis in the prior art is solved.
Optionally, the propulsion of the LNG transport vessel comprises: main thrusters (e.g., marine main engines, propulsion motors, etc.) and side thrusters. Step S102 further includes the steps of:
step S1021, respectively acquiring operation indication signals of the main propeller and the side propellers; the operation indication signal includes at least one of: switching signal, power, speed, current.
In step S1022, an operation state of the main thruster is determined based on the operation indication signal of the main thruster.
Alternatively, if the decision is made by the switching signal (switching amount) of the main propeller, it is first necessary to confirm the meaning represented by the signal value, for example, 1 represents the on state, 0 represents the off state; secondly, judging the real-time values of the running states of all the main propellers, if the real-time values are 1, judging that the main propellers are in a starting state, and if the real-time values are 0, judging that the main propellers are in a stopping state.
Alternatively, if signals (analog quantities) such as power, rotating speed and current of the main propeller are selected, a judgment threshold value of the signals is firstly determined, for example, the judgment threshold value of the power of the main propeller is 1, and then the operation state of the equipment is determined by judging the magnitude relation between a real-time value of the operation indication signal of the main propeller and the threshold value, for example, the power of the main propeller is less than or equal to 1, the machine is determined to be in a stop state, the power of the main propeller is greater than 1, and the machine is determined to be in a start-up state.
In step S1023, the operation state of the side thruster is determined based on the operation instruction signal of the side thruster.
Alternatively, if the judgment is selected by the switching signal (switching amount) of the side thruster, the meaning of the signal value is firstly required to be confirmed, for example, 1 represents the on state, and 0 represents the off state; secondly, judging the real-time values of the running states of all the side propellers, if the real-time values are 1, judging that the side propellers are in a starting state, and if the real-time values are 0, judging that the side propellers are in a stopping state.
Alternatively, if signals (analog quantities) such as power, rotation speed and current of the side thruster are selected, a judgment threshold of the signals is firstly determined, for example, the judgment threshold of the power of the side thruster is 1, and then the operation state of the equipment is determined by judging the magnitude relation between the real-time value of the operation indication signal of the side thruster and the threshold, for example, the power of the side thruster is less than or equal to 1, the equipment is determined to be in a stop state, and the power of the side thruster is greater than 1, and the equipment is determined to be in a start state.
Optionally, step S104 further includes:
step S1041, judging whether the main thruster and the side thruster are both in a stop state; and if not, determining that the LNG transport ship is in the maneuvering condition.
Step S1042, if the operation indication signal is lost and the operation state of the thruster of the LNG carrier cannot be determined, acquiring the longitudinal ground speed of the LNG carrier.
Step S1043, judging whether the longitudinal ground speed is greater than a preset speed value; and if so, determining that the LNG transport ship is in the maneuvering condition.
Specifically, if all main propellers and side propellers of the ship are in a stopped state, determining that the ship is in a berthing working condition;
if at least 1 main propeller or side propeller of the ship is in a starting state, determining that the ship is in a maneuvering condition;
if the state of at least 1 main propeller or side propeller of the ship cannot be judged, for example, the required operation indication signals are judged to be lost, and the other main propellers or side propellers are in a starting state, the ship is determined to be in a maneuvering condition;
if the ship has at least 1 main propeller or side propeller which can not judge the state, for example, the required operation indication signals are all lost, and the other main propellers or side propellers are in a shutdown state, the relation between the longitudinal ground speed of the ship and the preset speed needs to be further judged, and if the real-time longitudinal ground speed of the ship is greater than the preset speed, the ship is determined to be in a maneuvering working condition; if the real-time longitudinal ground speed of the ship is less than or equal to the preset speed, determining that the ship is in a berthing working condition;
if all the main thrusters and the side thrusters of the ship cannot judge the state, if the required operation indication signals are judged to be lost, the relation between the longitudinal ground speed of the ship and the preset speed needs to be further judged, and if the real-time longitudinal ground speed of the ship is greater than the preset speed, the ship is determined to be in a maneuvering condition; and if the real-time longitudinal ground speed of the ship is less than or equal to the preset speed, determining that the ship is in a berthing working condition.
Except the above 5 cases, judging that the ship is in an unknown working condition under all other cases; if the required signal is lost due to the interruption of the ship-shore communication, after the ship-shore communication is recovered, the system can judge again according to the judgment logic; if the signal needed for judgment is lost due to the data source, the system does not judge again.
Optionally, step S106 further includes the following steps:
step S1061, acquiring current position information of the LNG transport ship; the current location information includes the latitude and longitude of the LNG carrier. Alternatively, the current position information of the LNG carrier may be acquired by a global positioning system such as GPS or beidou.
Step S1062, acquiring target position information of a destination port; the target position information includes the latitude and longitude of the destination port. Alternatively, the name of the destination port, which is a port at which the LNG carrier vessel is to be berthed, may be input through the AIS system output or a crew member, and then the target location information may be obtained by inquiring latitude and longitude information in the global port database.
Step S1063, based on the current position information and the target position information, calculating distance information between the LNG transport ship and the destination port by using a preset distance algorithm; the preset distance algorithm includes any one of: a great circle route algorithm and a constant direction route algorithm.
Optionally, step S108 further includes the steps of:
step S1081, obtaining a plurality of liquid level values corresponding to a plurality of time sampling points of the liquid level of the cargo compartment in a preset period.
Specifically, a preset period to be calculated is determined first, for example, the preset period may be 1min, 10min, and the like, and the selection of the preset period may be determined according to the cargo tank liquid level signal acquisition frequency.
Then all cargo tank level values in the last 1 preset period are inquired from the database, for example, the calculation period is 10min, the cargo tank level acquisition frequency is 1min, and the current time is 2020-12-0718.
Step S1082, calculating standard deviations of the plurality of liquid level values, and taking the standard deviations of the plurality of liquid level values as standard deviations of the liquid level of the cargo hold of the LNG transport ship in a preset period.
Optionally, fig. 2 is a flowchart of a method for determining a target operating condition according to an embodiment of the present invention. As shown in fig. 2, step S110 further includes the following steps:
step 1101, judging whether the distance information is smaller than a preset distance; if yes, step S1102 is performed, and if no, step S1106 is performed.
Step S1102, judging whether the standard deviation is larger than a preset standard deviation value; if yes, step S1103 is executed, and if no, step S1106 is executed.
Step S1103, judging whether the variation is larger than zero; if so, step S1104 is performed, and if not, step S1105 is performed.
Optionally, the variation is a variation of a cargo tank liquid level of the LNG carrier during a preset period of time. Specifically, the variable quantity is a difference value between a liquid level value corresponding to the cargo tank liquid level of the LNG transport ship at the end of the preset cycle time and a liquid level value corresponding to the initial time of the preset cycle time. In the preset cycle time, if the cargo tank liquid level is high, the variation is larger than zero, and if the cargo tank liquid level is low, the variation is smaller than zero.
And step S1104, determining the target working condition as a loading working condition.
And step S1105, determining the target working condition as the unloading working condition.
In step S1106, the determination is finished without determining the target operating condition.
Specifically, the logic for judging the loading and unloading working condition of the LNG transport ship is as follows:
step 1, judging whether the ship is currently in a berthing working condition, if the ship is in a maneuvering working condition or an unknown working condition, turning to step 5 without judging a loading and unloading working condition; if the ship is in the berthing working condition, turning to the step 2;
step 2, judging whether the distance from the current position of the ship to the destination port is smaller than a certain judgment threshold value (namely a preset distance), if the distance from the current position of the ship to the destination port is larger than or equal to the preset distance, judging the loading and unloading working condition, and turning to the step 5; if the distance from the current position of the ship to the destination port is smaller than the preset distance, turning to the step 3;
step 3, judging the total standard deviation of the latest calculation period (namely a preset period) of the liquid level of each LNG cargo tank, if the total standard deviations of the latest calculation period of the liquid levels of all the LNG cargo tanks are less than or equal to a certain threshold value (namely a preset standard deviation value), turning to step 5 without judging the loading and unloading working conditions; if the total standard deviation of at least 1 LNG cargo tank liquid level in the latest calculation period is larger than a certain threshold value, turning to a step 4;
step 4, judging the size relation between the real-time liquid level of the LNG cargo tank with the total standard deviation larger than a certain threshold value and the liquid level of the LNG cargo tank at the earliest moment in the latest calculation period; if the real-time liquid level of the cargo hold is greater than the liquid level of the cargo hold at the earliest moment in the latest calculation period, judging the cargo holding working condition; otherwise, judging the unloading working condition;
and 5, finishing judgment.
From the above description, the invention provides a method for judging the loading and unloading working condition of the LNG transport ship, which realizes the judgment of the loading and unloading working condition of the LNG transport ship, and based on the judged working condition, a shore-based manager can realize the safety management of the LNG transport ship through other data within the time range of the loading and unloading working condition.
Example two:
fig. 3 is a schematic diagram of a system for determining a loading/unloading condition of an LNG carrier according to an embodiment of the present invention. As shown in fig. 3, the system includes: the device comprises a first obtaining module 10, a first judging module 20, a second obtaining module 30, a third obtaining module 40 and a second judging module 50.
Specifically, the first obtaining module 10 is configured to obtain an operation state of a propeller of the LNG carrier; the operating state includes any one of: a power-on state and a power-off state.
And the first judging module 20 is configured to judge whether the LNG transportation ship is in a maneuvering condition based on the operation state.
And a second obtaining module 30, configured to obtain distance information between the LNG carrier and the destination port.
And the third acquiring module 40 is used for acquiring a standard deviation of the liquid level of the cargo space of the LNG carrier, which changes within a preset period.
The second judging module 50 is used for judging the target working condition of the LNG transport ship based on the distance information and the standard deviation; the target operating condition includes any one of: loading working condition and unloading working condition.
The embodiment of the invention provides a system for judging the loading and unloading working condition of an LNG transport ship, which can accurately judge the loading and unloading working condition of the LNG transport ship through comprehensive judgment of the maneuvering working condition of the LNG transport ship, the distance information between the LNG transport ship and a destination port and the standard deviation and the variable quantity of the cargo space liquid level of the LNG transport ship in a preset period, so that a shore-based manager can realize the safety management of the LNG transport ship through other data in the time range of the loading and unloading working condition, and the technical problem that the manager is difficult to carry out the safety management on the loading and unloading working condition of the LNG transport ship through data analysis in the prior art is solved.
Specifically, the second determining module 50 is further configured to: judging whether the distance information is smaller than a preset distance or not; if so, judging whether the standard deviation is larger than a preset standard deviation value or not; if yes, judging whether the variation is larger than zero; if the variation is larger than zero, determining the target working condition as a loading working condition; and if the variation is not larger than zero, determining the target working condition as the unloading working condition.
The embodiment of the present invention further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and when the processor executes the computer program, the steps of the method in the first embodiment are implemented.
The embodiment of the invention also provides a computer readable medium with a non-volatile program code executable by a processor, wherein the program code causes the processor to execute the method in the first embodiment.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A method for judging loading and unloading working conditions of an LNG transport ship is characterized by comprising the following steps:
acquiring the running state of a propeller of the LNG transport ship; the operating state includes any one of: a startup state and a shutdown state;
judging whether the LNG transport ship is in a maneuvering condition or not based on the running state;
if not, acquiring distance information between the LNG transport ship and a destination port;
acquiring a standard deviation and a variable quantity of a cargo tank liquid level of the LNG transport ship in a preset period;
judging the target working condition of the LNG transport ship based on the distance information, the standard deviation and the variation; the target operating condition includes any one of: loading working condition and unloading working condition;
based on the distance information, the standard deviation and the variation, the target working condition of the LNG transport ship is judged, and the method comprises the following steps:
judging whether the distance information is smaller than a preset distance or not;
if so, judging whether the standard deviation is larger than a preset standard deviation value or not;
if yes, judging whether the variable quantity is larger than zero;
if the variable quantity is larger than zero, determining that the target working condition is a loading working condition;
and if the variation is not larger than zero, determining the target working condition as an unloading working condition.
2. The method of claim 1, wherein the thrusters of the LNG transport vessel comprise: a main thruster and a side thruster; acquiring an operating state of a thruster of an LNG transport vessel, comprising:
respectively acquiring running indication signals of the main thruster and the side thruster; the operation indication signal comprises at least one of: switching signal, power, speed, current;
determining an operational state of the main thruster based on the operational indication signal of the main thruster;
and determining the running state of the side propeller based on the running indication signal of the side propeller.
3. The method of claim 2, wherein determining whether the LNG transport vessel is mobile based on the operating condition comprises:
judging whether the main thruster and the side thruster are both in a shutdown state;
and if not, determining that the LNG transport ship is in the maneuvering condition.
4. The method of claim 3, further comprising:
if the running state of a propeller of the LNG transport ship cannot be determined due to the loss of the running indication signal, acquiring the longitudinal ground speed of the LNG transport ship;
judging whether the longitudinal ground speed is greater than a preset speed value or not;
and if so, determining that the LNG transport ship is in the maneuvering condition.
5. The method of claim 1, wherein obtaining distance information between the LNG transport vessel and a destination port comprises:
acquiring current position information of the LNG transport ship; the current location information comprises longitude and latitude of the LNG transport ship;
acquiring target position information of the destination port; the target position information comprises the longitude and latitude of the destination port;
calculating distance information between the LNG transport ship and the destination port by using a preset distance algorithm based on the current position information and the target position information; the preset distance algorithm comprises any one of: a great circle route algorithm and a constant direction route algorithm.
6. The method of claim 1, wherein obtaining a standard deviation of a cargo tank level of the LNG transport vessel over a preset period comprises:
acquiring a plurality of liquid level values corresponding to a plurality of time sampling points of the liquid level of the cargo hold in the preset period;
and calculating standard deviations of the plurality of liquid level values, and taking the standard deviations of the plurality of liquid level values as the standard deviations of the liquid level in the cargo hold of the LNG transport ship in a preset period.
7. The utility model provides a LNG transport ship loading and unloading goods operating mode judgement system which characterized in that includes: a first obtaining module, a first judging module, a second obtaining module, a third obtaining module and a second judging module, wherein,
the first acquisition module is used for acquiring the running state of a propeller of the LNG transport ship; the operating state includes any one of: a startup state and a shutdown state;
the first judging module is used for judging whether the LNG transport ship is in a maneuvering condition or not based on the running state;
the second acquisition module is used for acquiring distance information between the LNG transport ship and a destination port;
the third acquisition module is used for acquiring a standard deviation of a cargo tank liquid level of the LNG transport ship changing within a preset period;
the second judgment module is used for judging the target working condition of the LNG transport ship based on the distance information and the standard deviation; the target operating condition includes any one of: loading working condition and unloading working condition;
the second judging module is further configured to judge whether the distance information is smaller than a preset distance;
if so, judging whether the standard deviation is larger than a preset standard deviation value or not;
if yes, judging whether the variation is larger than zero;
if the variable quantity is larger than zero, determining that the target working condition is a loading working condition;
and if the variation is not larger than zero, determining the target working condition as an unloading working condition.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the steps of the method of any of the preceding claims 1 to 6 are implemented when the computer program is executed by the processor.
9. A computer-readable medium having non-volatile program code executable by a processor, wherein the program code causes the processor to perform the method of any of claims 1-6.
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| CN109890003A (en) * | 2019-01-10 | 2019-06-14 | 安徽天帆智能科技有限责任公司 | A kind of ship long-distance management system |
| CN110816781A (en) * | 2019-11-07 | 2020-02-21 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | Ship running state identification method and device |
| CN113189918A (en) * | 2021-05-25 | 2021-07-30 | 上海海事大学 | Ship anti-pollution equipment and safety equipment online monitoring system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109890003A (en) * | 2019-01-10 | 2019-06-14 | 安徽天帆智能科技有限责任公司 | A kind of ship long-distance management system |
| CN110816781A (en) * | 2019-11-07 | 2020-02-21 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | Ship running state identification method and device |
| CN113189918A (en) * | 2021-05-25 | 2021-07-30 | 上海海事大学 | Ship anti-pollution equipment and safety equipment online monitoring system and method |
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