Ship route planning method based on hydrological and meteorological conditions

Abstract

The ship route planning method based on hydrological and meteorological conditions comprises the following steps: Step 1, collecting comprehensive information of past ships, route information and hydrological and meteorological information; Step 2, collecting hydrological and meteorological information of the water area passed by the target ship; Step 3, matching the past ships with the same sailing direction; Step 4, calculating the environmental coefficients of the target ship and the matched past ships; Step 5, judging the similarity of the environmental coefficients of the target ship and the past ships; Step 6, obtaining the track density distribution of the past ships with a similarity greater than a preset threshold, and recommending a route for the target ship. By calculating the environmental coefficient, the similarity of the hydrological and meteorological conditions of the water area passed by the target ship and the past ship during sailing can be quantitatively evaluated, so that a reasonable route for a specific type of target ship can be recommended under the influence of similar hydrological and meteorological conditions, and the navigation safety of the ship is improved.

Description

Technical Field

[0001] This invention relates to the field of ship navigation technology, and more specifically to a ship route planning method based on hydrological and meteorological conditions. Background Technology

[0002] Inland waterway transportation plays an increasingly important role in the water transport system. However, the increase in vessel traffic and navigation routes has led to a more complex inland waterway navigation environment, raising concerns about water traffic safety. Vessels are affected by factors such as wind, currents, and waves during navigation, especially in narrow waterways, channels, or complex waters with many obstacles, which can easily lead to accidents such as grounding and collisions. Therefore, rationally planning vessel routes has become a key concern to improve navigation safety. Currently, domestic and international route planning for vessels mainly focuses on minimizing distance and energy consumption, with limited research on recommended routes for specific types of vessels based on hydrological and meteorological conditions.

[0003] During actual navigation, ships cannot choose suitable routes due to the complexity of changing hydrological and meteorological conditions in navigable waters. Matching routes taken by similar passing ships with hydrological and meteorological information about the waters the target vessel traverses can better help ships avoid navigational hazards caused by environmental factors and improve navigation efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a ship route planning method based on hydrological and meteorological conditions, which recommends routes for ships based on hydrological and meteorological information, thereby improving the safety and efficiency of ship navigation.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] The method for ship route planning based on hydrological and meteorological conditions includes the following steps:

[0007] Step 1: Collect comprehensive information on passing vessels, route information, and hydrological and meteorological information on the waters they pass through; Step 2: Based on the origin and destination of the target vessel, collect hydrological and meteorological information on the waters it passes through.

[0008] Step 3: Match passing vessels with the same vessel type, size, waterway, and direction of travel as the target vessel;

[0009] Step 4: Calculate the environmental coefficients of the target vessel and matching passing vessels based on the collected hydrological and meteorological information;

[0010] Step 5: Determine the similarity of the environmental coefficients between the target vessel and passing vessels;

[0011] Step 6: Obtain the track density distribution of past ships with similarity greater than a preset threshold, and plan and recommend routes for the target ship based on the historical habit routes of past ships.

[0012] The comprehensive information collected in Step 1 above includes the type and size of the vessel, the route information including the vessel's trajectory and direction of travel, and the hydrological information including the current velocity (v) as the vessel passes through different waterways. c Wave height h, and meteorological information including wind speed v when the ship passes through different waters. w And the visible distance L.

[0013] The calculation of the environmental coefficient in Step 4 above involves wind influence factor W, current influence factor C, wave influence factor H, and visibility influence factor V;

[0014] According to the wind speed v in the water w The wind impact factor W of a ship is calculated based on the current velocity v in the water. c Calculate the current impact factor C of the ship, calculate the wave impact factor H of the ship based on the wave height h in the water area, and calculate the visibility impact factor V of the ship based on the visibility distance L in the water area;

[0015] Environmental coefficient E of ship i in different waters j ij for:

[0016] E ij =k*[log(W ij )+log(C ij )+log(H ij )+log(V ij )]

[0017] Where k is a coefficient, i represents each ship, and j represents each section of waterway that the ship needs to pass through.

[0018] In Step 5 above, the similarity parameter λ between the past vessel i and the target vessel... i for:

[0019]

[0020] Where i represents each ship, E ij E represents the environmental coefficient of ship i in different waters j. j The environmental coefficient representing the target vessel in different waters;

[0021] The similarity sim of the environmental coefficients of past vessel i and the target vessel i :

[0022]

[0023] Among them, similarity simi It lies within the interval [0,1].

[0024] In Step 6 above, if the environmental coefficient similarity sim between the target vessel and passing vessels is... i If the hydrological and meteorological conditions of the passing vessel i are greater than the preset threshold, it is determined that the hydrological and meteorological conditions of the waters through which the target vessel needs to pass are highly similar. The track lines of these passing vessels are density processed to obtain the track density distribution of the vessels. The historical habitual routes of the passing vessels are defined by the track density distribution. Based on the similar hydrological and meteorological conditions, a route planning recommendation is made for the target vessel based on the historical habitual routes of the passing vessels.

[0025] This invention provides a ship route planning method based on hydrological and meteorological conditions. It matches passing ships with the same ship type, size, navigation direction, and waterway as the target ship. By calculating environmental coefficients based on the navigation routes of passing ships, the similarity of hydrological and meteorological conditions of the waterways traversed by the target ship and passing ships can be quantitatively evaluated. This allows for the recommendation of reasonable routes for specific types of target ships under similar hydrological and meteorological conditions, thereby improving the navigation safety of ships. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0027] Figure 1 This is a flowchart of the method of the present invention. Detailed Implementation

[0028] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0029] Example:

[0030] The method for ship route planning based on hydrological and meteorological conditions includes the following steps:

[0031] Step 1: Collect comprehensive information on passing ships, route information, and hydrological and meteorological information on the waters they pass through.

[0032] Step 2: Collect hydrological and meteorological information of the waters j through which the target vessel travels, based on the origin and destination of the target vessel.

[0033] In this case, the hydrological and meteorological parameters of the waterway 1 through which the target vessel needs to pass are shown in Table 1 below.

[0034] Table 1 Hydrological and meteorological parameters within water area 1 at this time

[0035] Wind speed (m / s) <![CDATA[v w =5(m / s)]]> At this moment, the wind speed in water area 1 is 5 (m / s). Flow velocity (m / s) <![CDATA[v c =0.9(m / s)]]> <![CDATA[At this time, the flow velocity in water area 1 is 0 . 9(m / s) <!-- 2 -->]]> Wave height (m) h = 0.7 (m) <![CDATA[At this time, the wave height in water area 1 is 0 . 7(m)]]> Visibility distance (km) L = 12 (km) At this moment, the visibility within water area 1 is 12 km.

[0036] Step 3: Match passing vessels with the same vessel type, size, waterway, and direction of travel as the target vessel to obtain hydrological and meteorological information parameters of the passing vessel i when it passes through waterway j.

[0037] In this case, the hydrological and meteorological information parameters of the passing vessel 1 when it passed through waterway 1 are shown in Table 2 below.

[0038] Table 2 Hydrological and meteorological information parameters of vessel 1 during its transit through waterway 1.

[0039] Wind speed (m / s) <![CDATA[v w =7(m / s)]]> The wind speed when vessel 1 passed through waterway 1 was 7 m / s. Flow velocity (m / s) <![CDATA[v c =1.2(m / s)]]> The current speed of vessel 1 when passing through waterway 1 is 1.2 (m / s). Wave height (m) h = 1 (m) The wave height of vessel 1 when it passes through waterway 1 is 1 (m). Visibility distance (km) L = 7 (km) The visibility distance for vessel 1 when passing through waterway 1 is 7 km.

[0040] Step 4: Calculate the environmental coefficients of the target vessel and the matched passing vessels based on the collected hydrological and meteorological information.

[0041] Based on wind speed v w In this embodiment, the wind speed v in the waterway is set as an example of the influence of factors on the ship's route. w The formula for calculating the wind impact factor W is:

[0042]

[0043] In the formula, v w This refers to the wind speed in the different waters the ship passes through.

[0044] Based on flow velocity v c In this embodiment, the influence of factors on ship routes is defined by the current velocity v in the water area. c The formula for calculating the flow impact factor C is:

[0045] C = 1 + 3v c

[0046] In the formula, v c This refers to the current speed in different waterways that the ship passes through.

[0047] Based on the influence of wave height h on ship routes, in this embodiment, the formula for calculating the wave influence factor H of wave height h in the water area is set as follows:

[0048] H = e 1.1512h

[0049] In the formula, h represents the wave height of the different waters the ship passes through.

[0050] Based on the impact of visibility distance L on ship routes, in this embodiment, the formula for calculating the visibility influence factor V of visibility distance L in water is set as follows:

[0051]

[0052] In the formula, L represents the visibility distance of the ship in different waters it passes through.

[0053] Among them, the wind influence factor W, the current influence factor C, the wave influence factor H, and the visibility influence factor V are located in the interval [0,1].

[0054] In this embodiment, the environmental coefficient E of ship i in different waters j is calculated based on the influence of hydrological and meteorological conditions. ij for:

[0055]

[0056] Where i represents each vessel, j represents each segment of waterway the vessel needs to traverse, and the environmental coefficient E ij It lies within the interval [0,1].

[0057] According to Tables 1 and 2, the wind speed v in the water area w The wind impact factor W of a ship can be calculated based on the current velocity v in the water. c Calculate the current impact factor C of the ship, calculate the wave impact factor H of the ship based on the wave height h in the water area, calculate the visibility impact factor V of the ship based on the visibility distance L in the water area, and calculate the environmental coefficient of the water area j that the target ship needs to pass through, as well as the environmental coefficient of the passing ship i when passing through water area j.

[0058] In this case, the environmental coefficient of the water area 1 that the target vessel needs to pass through is calculated to be 0.423, and the environmental coefficient of the passing vessel 1 when passing through water area 1 is 0.567.

[0059] Step 5: Determine the similarity of the environmental coefficients between the target vessel and passing vessels.

[0060] In this case, based on the environmental coefficients of the target vessel and passing vessel 1 in different waters j calculated in step 4, the similarity parameter λ1 and similarity sim1 between passing vessel 1 and the target vessel are calculated. The calculated similarity sim1 between the target vessel and passing vessel 1 is 0.872.

[0061] Step 6: Obtain the track density distribution of past vessels with similarity greater than a preset threshold, and recommend routes for the target vessel based on the habitual routes of past vessels.

[0062] Determine the similarity between the hydrological and meteorological conditions of the waters through which the target vessel i navigates and the hydrological and meteorological conditions of the waters through which the target vessel needs to pass. When sim i If the similarity is ≥0.85, it is determined that the hydrological and meteorological conditions of the passing vessel i during its voyage are highly similar to the hydrological and meteorological conditions of the waterway through which the target vessel needs to pass. In this embodiment, the similarity sim1 between the target vessel and the passing vessel 1 is 0.872, which is greater than the preset threshold.

[0063] All passing vessels with a similarity greater than a preset threshold are selected. The track lines of these passing vessels are then subjected to density processing to obtain the vessel track density distribution. The habitual routes of passing vessels are defined based on the track density distribution, and route recommendations are made for target vessels.

Claims

1. A method for ship route planning based on hydrological and meteorological conditions. Its characteristic is that the steps are as follows: Step 1: Collect comprehensive information on passing ships, route information, and hydrological and meteorological information on the waters they pass through; Step 2: Collect hydrological and meteorological information on the waters the target vessel passes through, based on the target vessel's origin and destination. Step 3: Match passing vessels with the same vessel type, size, waterway, and direction of travel as the target vessel; Step 4: Calculate the environmental coefficients of the target vessel and matching passing vessels based on the collected hydrological and meteorological information; Step 5: Determine the similarity of the environmental coefficients between the target vessel and passing vessels; Step 6: Obtain the track density distribution of past ships with similarity greater than a preset threshold, and plan and recommend routes for the target ship based on the historical habit routes of past ships.

2. The ship route planning method based on hydrological and meteorological conditions according to claim 1, characterized in that, The comprehensive information collected in Step 1 includes the type and size of the vessel, the route information including the vessel's trajectory and direction of travel, and the hydrological information including the current velocity (v) as the vessel passes through different waterways. c Wave height h, and meteorological information including wind speed v when the ship passes through different waters. w And the visible distance L.

3. The ship route planning method based on hydrological and meteorological conditions according to claim 2, characterized in that, The calculation of the environmental coefficient in Step 4 involves wind influence factor W, current influence factor C, wave influence factor H, and visibility influence factor V; According to the wind speed v in the water w The wind impact factor W of a ship is calculated based on the current velocity v in the water. c Calculate the current impact factor C of the ship, calculate the wave impact factor H of the ship based on the wave height h in the water area, and calculate the visibility impact factor V of the ship based on the visibility distance L in the water area; Environmental coefficient E of ship i in different waters j ij for: E ij =k*[log(W ij )+log(C ij )+log(H ij )+log(V ij )] Where k is a coefficient, i represents each ship, and j represents each section of waterway that the ship needs to pass through.

4. The ship route planning method based on hydrological and meteorological conditions according to claim 3, characterized in that, In Step 5, the similarity parameter λ between the passing vessel i and the target vessel... i for: Where i represents each ship, E ij E represents the environmental coefficient of ship i in different waters j. j The environmental coefficient representing the target vessel in different waters; The similarity sim of the environmental coefficients of past vessel i and the target vessel i : Among them, similarity sim i It lies within the interval [0,1].

5. The ship route planning method based on hydrological and meteorological conditions according to claim 4, characterized in that, In Step 6, if the environmental coefficient similarity sim between the target vessel and passing vessels is... i If the hydrological and meteorological conditions of the passing vessel i are greater than the preset threshold, it is determined that the hydrological and meteorological conditions of the waters through which the target vessel needs to pass are highly similar. The track lines of these passing vessels are density processed to obtain the track density distribution of the vessels. The historical habitual routes of the passing vessels are defined by the track density distribution. Based on the similar hydrological and meteorological conditions, a route planning recommendation is made for the target vessel based on the historical habitual routes of the passing vessels.

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