CN115545433A - Ship flight segment progress calculation method and system - Google Patents
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Abstract
The invention provides a method and a system for calculating ship section progress, which are used for calculating the current ship section progress by reading ship information, section information and ship in-port information in real time in a navigation data center system, defining and acquiring standard navigation mileage and the information, wherein the current ship section progress comprises the range progress, the navigation time difference and the navigation time difference of the ship progress of a single section and multiple sections, and dynamically displaying the ship range progress, the navigation progress, the predicted arrival time and the ship state through a system visual interface.
Description
Technical Field
The invention relates to the technical field of ship leg digitization, in particular to a method and a system for calculating ship leg progress.
Background
The navigation condition of the ship is a problem of great concern to the ship company, because of the AIS, the ship company can track the ship in real time, and the ship company can track the ship dynamics including position, navigation speed, berthing or navigation and the like by means of the AIS and related systems derived from the AIS. Meanwhile, due to the AIS derivative products, the user can clearly know the current cargo position in the aspect of marine logistics tracking.
However, for deeper analysis of ship operations or tracking of marine logistics, a ship company needs to have more detailed knowledge about the ship's sailing situation, it is not enough to know only where the ship or cargo is currently located, and what the ship company or consumer wants to know is the distance from the ship to the destination, the estimated arrival time, the current ship location, and whether the location is earlier or later than before? Is it fast or slow? How much faster or how much slower in particular? This information is more important for the scheduling of the ship company.
Disclosure of Invention
The invention provides a method and a system for calculating ship voyage schedule, which aims to solve the problems that the acquisition and display of dynamic information of a ship in the prior art only can reflect the current ship position and the current ship speed, and a user or a manager cannot intuitively acquire data information such as current voyage schedule, navigation schedule, estimated arrival time and the like and cannot intuitively acquire the delayed or advanced state of the current ship.
The specific scheme is as follows:
a ship voyage progress calculation method comprises the following specific steps:
s1: reading ship information, flight segment information and ship on-port information in real time in a navigation data center system;
the ship information comprises the name and the type of a ship, the current position of the ship, the current state of the ship, the actual navigation time t, the actual navigation mileage, the port time length comprising the equal berth time length and the operation time length;
the navigation section information comprises an origin port, a destination, a navigation route of the ship confirmed by a step statistical method in the historical navigation route of the navigation section information, a navigation section mileage L and a reference time T of the navigation route, and predicted arrival time T calculated according to the reference time Support port And reference average speed v information calculated by the range mileage and the reference time;
the port information of the ship comprises average port time, wherein the average port time is an average value of the sum of historical berthing-waiting time and historical operation time;
s2: acquiring a point on the navigation route closest to the current position of the ship and recording the point as a theoretical position of the ship, and calculating a standard navigation mileage S of the current position of the ship on the section according to the theoretical position of the ship and the section mileage L of the section;
s3: calculating the voyage progress by using the standard voyage mileage S and the voyage mileage L;
s4: calculating the single-leg voyage schedule by utilizing the actual voyage time T and the reference voyage T, and calculating the multi-leg voyage schedule by utilizing the actual voyage time T, the reference voyage time T, the harbor time and the average harbor time;
s5: calculating the single-leg voyage time difference by using the actual voyage time t and the theoretical voyage time, wherein the theoretical voyage time is the time required by the ship to travel to the theoretical position of the ship according to the average speed V, and calculating the total voyage time difference of multiple voyages by using the single-leg voyage time difference accumulated value, the harbour-in time length of the attached harbour and the average harbour-in time length;
s6: calculating a single-leg voyage time difference ratio k by using the single-leg voyage time difference and the theoretical voyage time; calculating the multi-flight-segment flight path time difference ratio k by using the total flight path time difference, the theoretical flight path time and the average in-port time of the multi-flight segment General assembly ；
S7: the ship information read by the navigation data center system comprises the name and type of the ship and the current state of the ship, and the flight segment information comprises predicted arrival time t Support port And voyage schedule, voyage calculated in S3-S6And outputting the schedule result to a system visual interface, and searching ship information, voyage schedule and voyage schedule by inputting the ship name in the system visual interface by a user.
The definition method of the flight segment comprises the following steps: if the ship does not need to berth or other ports, the destination is a destination port, and the process from the starting port to the destination port is regarded as a navigation section; if the ship needs to berth or other ports, the navigation process from the starting port to the berthing operation point or other ports is regarded as a navigation section, and the destination is the berthing operation point or other ports; from the berthing operation point or other port to the destination port, the destination is the destination port.
The specific mode of confirming the ship navigation route confirmed by a step statistical method in the historical navigation route of the navigation section information and confirming the navigation section mileage L and the reference time T of the navigation route is as follows:
s1: searching the section mileage and the voyage data in the historical voyage route in the past year in the section information;
s2: preferentially selecting the mileage and the voyage time of the current ship executing the voyage section in the past year as the voyage section mileage L and the reference voyage time T of the ship; if the current ship data does not exist, selecting the mileage and the voyage time of the ship for executing the voyage section as the voyage section mileage L and the reference voyage time T of the ship by the sister ship; if the sister ship data do not exist, selecting the ship with the same ship type and the same load ton magnitude to execute the mileage and the voyage as the ship section mileage L and the reference voyage T of the ship again, and if the ship data with the same ship type and the same load ton magnitude do not exist, selecting the mileage and the voyage of other ships to execute the voyage section as the ship section mileage L and the reference voyage T of the ship;
s3: if no data exists in the mode in S2, selecting the open harbor spacing published internationally as the section mileage L, and calculating the reference voyage time T according to the designed standard speed of the ship and the harbor spacing.
The specific calculation method of the standard navigation mileage S comprises the following steps:
s1: and taking a point of the closest distance between the current position of the ship and the navigation route and recording the point as a theoretical position of the ship, calculating coordinate information of the point according to a geographical coordinate function, and calculating the distance from the starting point of the navigation route to the theoretical position of the ship along the navigation route to be a standard navigation mileage.
The method for calculating the single-flight-segment flight distance progress comprises the following steps:
s is the voyage mileage, and L is the voyage mileage.
The calculation method of the single-flight-segment flight time progress comprises the following steps,
t is the actual voyage time and T is the reference voyage time for the entire voyage segment.
The single-leg voyage time difference is the time difference between the actual voyage time and the theoretical voyage time, and the theoretical voyage time is calculated by multiplying the voyage progress by the reference voyage time, namely:
t is the actual voyage time, T is the reference voyage time of the whole voyage section, S is the voyage mileage, and L is the voyage section mileage;
when the voyage time difference is positive, the actual voyage time is greater than the theoretical voyage time, and delay is represented; when the voyage time difference is negative, the actual voyage time is less than the theoretical voyage time, and the actual voyage time is ahead of schedule; and when the voyage time difference is 0, the actual voyage time is equal to the theoretical voyage time.
The single-flight range time difference ratio is the ratio of the flight range time difference to the theoretical navigation time, namely:
delta is voyage time difference and theoretical voyage time
T is the reference time of the whole flight, S is the flight mileage, L is the flight mileage and the reference average speed
Judging the sailing situation through the voyage time difference ratio k, and if | k | ≦ 10%, determining that the sailing is normal; 10% < | k | <20% is a slight delay or advance; and if k <0 is in advance, the navigation is delayed or advanced by 20 percent, and if k >0 is delayed.
The average port time length is the average of the sum of the time taken by the ship to arrive at the port and leave the port after the berthing operation is completed in the past period; the past period of time is determined according to the amount of historical data and can be a year, a half year or three months or a time range selected according to actual conditions.
The method for calculating the progress of the multi-range voyage comprises the following steps:
and sigma S is the sum of the voyage mileage, and sigma L is the sum of the voyage mileage.
The method for calculating the multi-leg flight-time progress comprises the following steps,
Σt i for the accumulated value of actual voyage time, t pi Indicating the actual port time of the destination port of the ith leg,
mean time-to-port, Σ t, representing the destination port of the ith leg pi For integrating values of time duration in port, sigma T i For the whole voyageA reference time-of-flight cumulative value of the segment,
The accumulated value is the average time length in the harbor. If the ith flight leg has not reached the destination port, t pi The value is 0, and for the flight segment after the ith flight segment, the values of the two are both 0.
The total voyage time difference of the multiple voyages is the accumulated value of the single voyage time difference and the accumulated value of the difference value between the port time length and the average port time length, and specifically comprises the following steps:
∑Δ i is the accumulated value of the single-flight range time difference, t pi Indicating the actual port time of the destination port of the ith leg,
the average port time duration of the destination port of the ith leg is represented. If the ith flight leg has not reached the destination port, t pi The value is 0, and for the flight segment after the ith flight segment, the values of the two are both 0.
The specific calculation method of the multi-range time difference ratio comprises the following steps:
△ general assembly The total range time difference of the multi-range,
Is the theoretical navigation time of the front n-1 flight segment,
Is the theoretical voyage time for the nth voyage segment.
A ship leg progress calculation system comprises a ship leg information acquisition unit, a ship leg progress calculation unit and a system visual interface;
the ship section information acquisition unit receives ship information, section information and port information of a ship in a platform system in the shipping data; the ship information comprises the name and the type of a ship, the current position of the ship, the current state of the ship, the actual navigation time t, the actual navigation mileage, the port time length comprising the equal berth time length and the operation time length; the section information comprises an initial port, a destination, a section mileage L and a reference time T of the ship confirmed by a step statistic method in the historical section mileage of the section information, and a predicted port arrival time T calculated according to the reference time Support port And reference average speed v information calculated by the range mileage and the reference time; the port information of the ship comprises average port time, and the average port time is an average value of historical berthing-waiting time and historical operation time;
the ship leg progress calculation unit calculates the range progress, the voyage progress, the range time difference and the range time difference ratio by utilizing the ship information and the leg information in the ship leg information acquisition unit;
the system visual interface receives ship information of the ship flight section information acquisition unit, wherein the ship information comprises the name and the type of a ship and the current state of the ship, and the flight section information comprises predicted arrival time t Support port And receiving the voyage progress and the time progress result calculated by the ship voyage progress calculation unit and displaying the voyage progress and the time progress result on a system visual interface in a proportional mode, and searching the ship information, the voyage progress and the time progress by inputting a ship name on the system visual interface by a user.
Drawings
FIG. 1 is a flow chart of a method for calculating the progress of a ship flight segment.
Fig. 2 is a visualization interface presentation.
Fig. 3 is a block diagram of a ship leg progress calculation system.
Detailed Description
The method for calculating the ship voyage progress is further described below with reference to the above illustrated flows and examples, and related system implementations are shown at the same time.
Example 1
As shown in fig. 1, a method for calculating a progress of a ship voyage segment includes the following steps:
s1: reading ship information, flight segment information and ship on-port information in real time in a navigation data center system;
the ship information comprises the name and the type of a ship, the current position of the ship, the current state of the ship, the actual navigation time t, the actual navigation mileage, the port time length comprising the equal berth time length and the operation time length;
the navigation section information comprises an origin port, a destination, a navigation route of the ship confirmed by a step statistical method in the historical navigation route of the navigation section information, a navigation section mileage L and a reference time T of the navigation route, and predicted arrival time T calculated according to the reference time Support port And reference average speed v information calculated by the range mileage and the reference time;
the port information of the ship comprises average port time, wherein the average port time is an average value of the sum of historical berthing-waiting time and historical operation time;
s2: acquiring a point on the navigation route closest to the current position of the ship and recording the point as a theoretical position of the ship, and calculating a standard navigation mileage S of the current position of the ship on the section according to the theoretical position of the ship and the section mileage L of the section;
s3: calculating the voyage progress by using the standard voyage mileage S and the voyage mileage L;
s4: calculating the single-leg voyage schedule by utilizing the actual voyage time T and the reference voyage T, and calculating the multi-leg voyage schedule by utilizing the actual voyage time T, the reference voyage time T, the harbor time and the average harbor time;
s5: calculating a single voyage range time difference delta by using the actual voyage time t and theoretical voyage time, and calculating the total voyage range time difference of multiple voyages by using the single voyage range time difference accumulated value, the harbour-in time of the attached harbour and the average harbour-in time, wherein the theoretical voyage time is the time required by the ship to travel to the theoretical position of the ship according to the average speed V;
s6: calculating the single voyage by using the single voyage section voyage time difference delta and the theoretical voyage timeA range time difference ratio k; calculating the multi-flight-range time difference ratio k by using the total flight-range time difference, the theoretical navigation time and the average in-port time of the multi-flight-range General assembly ；
S7: the ship information read by the navigation data center system comprises the name and type of the ship and the current state of the ship, and the flight segment information comprises predicted arrival time t Support port And outputting the voyage progress and the time progress result calculated in the S3-S6 to a system visual interface, and searching ship information, voyage section information, voyage progress and time progress by inputting a ship name in the system visual interface by a user.
The shipping data middle platform system is a shipping big data calculation retrieval and system based on AIS, and the system converts the data into data which can be directly used through storage and calculation of big data according to ship basic data, port base data, ship AIS data, geographic information data and the like, and data such as voyage mileage, actual voyage mileage, voyage duration and the like of a ship related to calculation can be retrieved from the system through the following examples.
The invention relates to the following description and definition of relevant concepts of the measurement indexes of the ship flight range progress:
a. and (4) a flight section: the whole process that the ship leaves an initial port, sails in the middle and arrives at a destination port is considered as 2 navigation sections if berthing and other operations exist in the middle;
b. navigation route: in the shipping industry, "route" is of special significance, so the navigation route is used to specifically define the ship navigation route from the starting port to the destination port in a, but the navigation route defined herein does not refer to a ship specific navigation route at a time, but refers to the route usually taken by most ships related to the route (the route is the route usually used in the shipping industry);
c. voyage mileage: defining the total mileage required by the ship from the starting port to the destination port in the step a, wherein the section mileage is related to the definition b, and in practical situations, various navigation routes can be available from the starting port to the destination, and the conventional navigation route is taken as the mileage, so that the section mileage is a statistical value, namely the total mileage of the definition b;
d. and (3) reference time: defining the total time required for the vessel from the origin port to the destination port as described in a, similar to definition c, where the time required to complete definition b is taken, and thus the reference time of flight is a statistic;
e. reference average speed of flight: based on an inference of definition c and definition d, reference average speed = range mileage/reference time;
f. navigation mileage: specifically, when a ship executes one time, the actual voyage mileage from an origin port to a destination port is mapped to the passed mileage on the corresponding voyage route (definition b), which is not the actual driving mileage (i.e. not the actual voyage mileage) of the ship;
g. duration of navigation: specifically, a time period from the moment when a ship leaves an original port to the current time when navigating from the original port to a destination port is performed, wherein the time period comprises all navigation time before the ship arrives at the destination port and non-navigation time;
h. length in port: the total time from the beginning of the berthing of the ship entering the port to the departure of the ship from the port;
in addition to the above mentioned metrics and related concepts of ship leg progress, there are additional concepts that are not directly related to the metrics directly described in the present invention, but are related to the overall understanding of the departure from origin port to destination port, particularly when a ship is going through a leg from origin port to destination port once, as described below:
a. the actual navigation duration is as follows: in particular the length of time a ship is actually sailing when one ship carries out a navigation segment from an origin port to a destination port;
b. actual voyage mileage: particularly, when a ship carries out a navigation section from an origin port to a destination port, the actual navigation mileage of the ship is actually larger than the navigation section mileage as long as all the navigation mileage before the ship reaches the destination port;
c. remaining mileage: based on an inference of definition c and definition f, remaining range = range-range;
d. estimated arrival time: in particular the time at which a ship is predicted to arrive at a destination port when a ship is executing a section from the origin port to the destination port;
e. arrival time: specifically, the time when a ship actually arrives at a destination port when one ship performs a navigation section from the origin port to the destination port;
f. the equal parking time: the sum of the time for a ship to arrive at a destination port and wait for berthing;
g. the operation time length is as follows: the total duration of the ship before starting berthing, entering a navigation state again after leaving berth and entering next flight cycle is indicated;
h. average length in port: the time from arrival at the port to completion of berthing operations leaving the port over a period of time (one year, half a year or 3 months) is counted, which is a statistical value and also an average value.
i. Actual length in port: the actual arrival time of the ship at port to the departure time of the ship from port, the berthing waiting time plus the operation time.
Example 2: a method for calculating the progress of a single-flight-section ship flight section.
Assume that ship a is currently performing a voyage section from port P1 to P2, which is a voyage state.
(1) And reading the current section information, the current position and the state information of the ship, and calculating according to the AIS related information to obtain data such as section mileage, voyage duration and the like. According to the comprehensive analysis calculation of the system, the following data are obtained: the voyage mileage 10380.6 nautical miles, the voyage mileage 4834.24 nautical miles and the voyage duration 263.86 hours. The navigation time is the actual navigation time.
(2) And calculating to obtain the relevant reference time according to historical data statistics. Such as: the reference time of flight from port P1 to P2 is 650.82 hours. The reference average speed was therefore calculated to be 15.95 knots.
(3) Calculating key indexes, and obtaining the following index values through calculation:
voyage progress =4834.24/10380.6=47%
Flight time progress =263.86/650.82=41%
Flight time difference =263.86- (4834.24/10380.6) × 650.82= -39.23 hours
Voyage time difference ratio = -39.23/((4834.24/10380.6) × 650.82) = -12.94%
According to the calculation result, the ship takes 41% of voyage for 47% of mileage, so that the ship reaches the current position in advance of the average level by 39.23 hours, and the advance is 12.94%.
Example 3: a method for calculating the progress of a multi-leg ship in a leg is disclosed.
For the calculation of the multiple flight sections, a segmented superposition mode can be adopted, the average time length in port and the actual time length in port are considered, and the total flight time difference is calculated, wherein t pi Indicating the actual port time of the destination port of the ith leg,
indicating the average port time of the i-th segment destination, to keep the clarity of the disclosure, it is specified that t is the time if the i-th segment has not reached the destination pi The value is 0, and for the flight segment after the ith flight segment, the values of the two are both 0.
Assume that vessel B performs a leg from P1-P2-P3, at which point the P1-P2 leg has been completed, is performing the P2-P3 leg, and has not yet reached P3.
(1) The following data were obtained from the system: the voyage period P1-P2 is 515 nautical miles, the voyage mileage is 515 nautical miles, and the voyage time is 70 hours; the voyage section P2-P3 mileage 10380.6 nautical miles, the voyage mileage 4834.24 nautical miles and the voyage duration 263.86 hours; the actual stay in port at port P2 is 33 hours long.
(2) And (3) calculating to obtain related reference time according to historical data statistics: the P1-P2 voyage section refers to 72 hours of voyage time and refers to 7.15 sections of average voyage speed; the reference flight time of the P2-P3 flight segment is 650.82 hours, and the reference average flight speed is 15.95 knots; the P2 port reference is on average 32 hours in port.
(3) Through calculation, the index values are obtained as follows:
voyage progress = (515+4834.24)/(515 + 10380.6) =49%
Aviation progress = (70 +263.86+ 33)/(72 +650.82+ 32) =48.6%
Voyage time difference = -2+1-39.23= -40.23 hours
Voyage time difference ratio = -40.23/(72 +32+ (4834.24/10380.6) × 650.82) = -9.88%
From the above calculations, it can be seen that the vessel has taken 48.6% of the voyage for 49% of the range, so that the vessel has reached the current position earlier than average by-40.23 hours, which is 9.88%.
Example 4: a ship voyage progress display system.
A ship section progress display system is designed according to a ship section progress calculation method, and related index data can be calculated and displayed according to a selected ship.
As shown in fig. 3, a ship leg progress calculation system includes a ship leg information acquisition unit, a ship leg progress calculation unit, and a system visualization interface;
the ship section information acquisition unit receives ship information, section information and port information of a ship in a platform system in the shipping data; the ship information comprises a ship name and a ship type, a current position of the ship, a current state of the ship, actual sailing time t, actual sailing mileage, equal berthing time and operation time; the section information comprises an origin port, a destination, a section mileage L and a reference time T of the ship confirmed by a step statistic method in the historical section mileage of the section information, and a predicted arrival time T calculated according to the reference time Support port And reference average speed v information calculated by the range mileage and the reference time; the port information of the ship comprises average port time, and the average port time is an average value of historical berthing-waiting time and historical operation time;
the ship leg progress calculating unit calculates a range progress, a voyage progress, a range time difference and a range time difference ratio by using the ship information and the leg information in the ship leg information acquiring unit;
as shown in fig. 2, the system visualization interface receives the ship information of the ship leg information obtaining unit, which includes the name and type of the ship and the current state of the ship, and the leg information includes the predicted arrival time t Support port Receiving the ship's voyageAnd the voyage progress calculated by the section progress calculation unit are displayed on a system visual interface in a proportional mode, and a user searches ship information, voyage section information, voyage progress and voyage progress through inputting a ship name on the system visual interface.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Not all embodiments are exhaustive. Obvious variations or modifications of the present invention are within the scope of the present invention, as set forth in the following claims.
Claims (15)
1. A ship leg progress calculation method is characterized by comprising the following specific steps:
s1: reading ship information, flight segment information and ship on-port information in real time in a navigation data center system;
the ship information comprises the name and the type of a ship, the current position of the ship, the current state of the ship, the actual navigation time t, the actual navigation mileage, the port time length comprising the equal berth time length and the operation time length;
the navigation section information comprises an origin port, a destination, a navigation route of the ship confirmed by a step statistical method in the historical navigation route of the navigation section information, a navigation section mileage L and a reference time T of the navigation route, and predicted arrival time T calculated according to the reference time Support port And the reference average speed calculated by the range mileage and the reference time
Information;
the port information of the ship comprises average port time length which is an average value of the sum of historical berthing waiting time length and historical operation time length;
s2: acquiring a point on the navigation route closest to the current position of the ship and recording the point as a theoretical position of the ship, and calculating a standard navigation mileage S of the current position of the ship on the section according to the theoretical position of the ship and the section mileage L of the section;
s3: calculating the voyage progress by using the standard voyage mileage S and the voyage mileage L;
s4: calculating the single-leg voyage schedule by utilizing the actual voyage time T and the reference voyage T, and calculating the multi-leg voyage schedule by utilizing the actual voyage time T, the reference voyage time T, the harbor time and the average harbor time;
s5: calculating the single-voyage time difference by using the actual voyage time t and the theoretical voyage time, wherein the theoretical voyage time is the time required for the ship to travel to the theoretical position of the ship according to the average speed V, and calculating the total voyage time difference of multiple voyages by using the single-voyage time difference integrated value, the port time length and the average port time length integrated value;
s6: calculating a single-leg voyage time difference ratio k by using the single-leg voyage time difference and the theoretical voyage time; calculating the multi-flight-segment flight path time difference ratio k by using the total flight path time difference, the theoretical flight path time and the average in-port time of the multi-flight segment General assembly ；
S7: the ship information read by the navigation data center system comprises the name and type of the ship and the current state of the ship, and the flight segment information comprises predicted arrival time t Support port And outputting the voyage progress and the time progress results calculated in the S3-S6 to a system visual interface, and searching ship information, voyage section information, voyage progress and time progress by inputting a ship name in the system visual interface by a user.
2. The method for calculating the progress of the ship leg of claim 1, wherein the method for defining the leg comprises the following steps: if the ship does not need to berth or other ports, the destination is a destination port, and the process from the starting port to the destination port is regarded as a navigation section; if the ship needs to berth or other ports, the navigation process from the starting port to the berthing operation point or other ports is regarded as a navigation section, and the destination is the berthing operation point or other ports; from the berthing operation point or other port to the destination port, the destination is the destination port.
3. The method for calculating the ship section progress according to claim 1 or 2, wherein the ship voyage route confirmed by the step statistic method in the historical voyage route of the section information, and the section mileage L and the reference voyage time T of the voyage route are confirmed by:
s1: searching the section mileage and the voyage data in the historical voyage route in the past year in the section information;
s2: preferentially selecting the mileage and the voyage time of the current ship executing the voyage section in the past year as the voyage section mileage L and the reference voyage time T of the ship; if the current ship data does not exist, selecting the mileage and the voyage time of the ship for executing the voyage section as the voyage section mileage L and the reference voyage time T of the ship by the sister ship; if the sister ship data do not exist, selecting the ship with the same ship type and the same load ton magnitude to execute the mileage and the voyage as the ship section mileage L and the reference voyage T of the ship again, and if the ship data with the same ship type and the same load ton magnitude do not exist, selecting the mileage and the voyage of other ships to execute the voyage section as the ship section mileage L and the reference voyage T of the ship;
s3: if no data exists in the mode in S2, selecting the open harbor spacing published internationally as the section mileage L, and calculating the reference voyage time T according to the designed standard speed of the ship and the harbor spacing.
4. The method for calculating the progress of the ship voyage section according to claim 1 or 3, wherein the specific calculation method of the standard voyage mileage S is as follows:
s1: and taking a point of the closest distance between the current position of the ship and the navigation route and recording the point as a theoretical position of the ship, calculating coordinate information of the point according to a geographical coordinate function, and calculating the distance from the starting point of the navigation route to the theoretical position of the ship along the navigation route to be a standard navigation mileage.
5. The method for calculating the progress of the ship voyage section of claim 1, wherein the method for calculating the progress of the single voyage section of the ship comprises the following steps:
s is the voyage mileage, and L is the voyage mileage.
6. The method for calculating the ship voyage section progress according to claim 1, wherein the method for calculating the single-voyage section voyage progress is that,
t is the actual voyage time and T is the reference voyage time for the entire voyage segment.
7. The method for calculating the ship leg progress according to claim 1, wherein the single leg voyage time difference is a time difference between the actual voyage time and the theoretical voyage time, and the theoretical voyage time is calculated by multiplying the reference voyage time by the voyage progress, that is:
t is the actual voyage time, T is the reference voyage time of the whole voyage section, S is the voyage mileage, and L is the voyage section mileage;
when the voyage time difference is positive, the actual voyage time is greater than the theoretical voyage time, and delay is represented; when the voyage time difference is negative, the actual voyage time is less than the theoretical voyage time, and the actual voyage time is ahead of schedule; and when the voyage time difference is 0, the actual voyage time is equal to the theoretical voyage time.
8. The method for calculating the progress of the ship leg of claim 1, wherein the single-leg range time difference ratio is a ratio of a range time difference to a theoretical voyage time, namely:
delta is voyage time difference and theoretical voyage time
T is the reference time of the whole flight, S is the flight mileage, L is the flight mileage and the reference average speed
9. The method for calculating the voyage course progress of the ship according to claim 8, wherein the voyage condition is judged according to the voyage time difference ratio k, and if | k | ≦ 10%, the voyage is normal; 10% < | k | <20% is a slight delay or advance; and if k <0 is in advance, the navigation is delayed or advanced by 20 percent, and if k >0 is delayed.
10. The method of claim 1, wherein the average port time is an average of the sum of the time taken for the ship to arrive at the port and for the berthing operation to finish leaving the port in the past period of time; the past period of time is determined based on the amount of historical data.
11. The method for calculating the progress of the ship voyage section of claim 1, wherein the method for calculating the progress of the multi-voyage section comprises the following steps:
and sigma S is the sum of the voyage mileage, and sigma L is the sum of the voyage mileage.
12. The method for calculating the ship voyage section progress according to claim 1, wherein the method for calculating the multi-section voyage time progress comprises the following steps,
Σt i for the accumulated value of actual voyage time, t pi Indicating the actual port time of the destination port of the ith leg,
mean time-to-port, Σ t, representing the destination port in the ith flight leg pi For integrating the values of the durations in ports, sigma T i Is a reference time-of-flight cumulative value of the whole flight segment,
To average the accumulated value of the time duration in port, if the ith flight segment has not yet reached the destination port, t pi The value is 0, and for the flight segment after the ith flight segment, the values of the two are both 0.
13. The method for calculating ship leg progress according to claim 12, wherein the total voyage time difference of the multiple legs is an integrated value of the single leg voyage time difference + an integrated value of the difference between the port time length of the ith leg and the average port time length, and specifically comprises:
∑Δ i is the accumulated value of the single-flight range time difference, t pi Indicating the actual port time of the destination port of the ith leg,
representing the average time length in port of the destination port of the ith flight segment; if the ith flight leg has not reached the destination port, t pi Then the value is 0 for the ith flightAnd in the navigation section after the section, the values of the two are both 0.
14. The method for calculating the progress of the ship leg of claim 13, wherein the specific calculation method for the multi-leg time difference ratio is as follows:
△ general assembly The total range time difference of the multi-range,
Is the theoretical navigation time of the front n-1 flight segment,
Is the theoretical voyage time for the nth leg.
15. A ship leg progress calculation system is characterized by comprising a ship leg information acquisition unit, a ship leg progress calculation unit and a system visual interface;
the ship section information acquisition unit receives ship information, section information and port information of a ship in a platform system in the shipping data; the ship information comprises the name and the type of a ship, the current position of the ship, the current state of the ship, the actual navigation time t, the actual navigation mileage, the port time length comprising the equal berth time length and the operation time length; the section information comprises an origin port, a destination, a section mileage L and a reference time T of the ship confirmed by a step statistic method in the historical section mileage of the section information, and a predicted arrival time T calculated according to the reference time Support port And reference average speed v information calculated by the range mileage and the reference time; the port information of the ship comprises average port time, and the average port time is an average value of historical berthing-waiting time and historical operation time;
the ship leg progress calculation unit calculates the range progress, the voyage progress, the range time difference and the range time difference ratio by utilizing the ship information and the leg information in the ship leg information acquisition unit;
the system visual interface receives ship information of the ship flight section information acquisition unit, wherein the ship information comprises the name and the type of a ship and the current state of the ship, and the flight section information comprises predicted arrival time t Support port And receiving the voyage progress and the time progress result calculated by the ship voyage progress calculation unit and displaying the voyage progress and the time progress result on a system visual interface in a proportional mode, and searching the ship information, the voyage progress and the time progress by inputting a ship name on the system visual interface by a user.
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