JPH02267700A - Drag anchor predicting device - Google Patents

Abstract

PURPOSE:To issue the warning of drag anchor early by storing relation of equation of a direction of wind and wind force at prescribed meteorological points in the past into a storage means and then storing the number of drag anchoring events at that time. CONSTITUTION:A storage means 2 is provided, which stores a conversion equa tion representing the relation among the number of drag anchor events in the past wind direction and wind force on sea and the wind direction and wind force on meteorological points. Then the information of the wind direction and wind force at present obtained from a prescribed meteorological point is inputted and when an entry from an input means 5 is given to an arithmetic means 1, the means 1 predicts the desired wind direction and wind force on sea from the conversion equation stored in the storage means 2 based on the entry and reads the number of drag anchor events in the past wind direction and wind force in the past corresponding to data stored in the storage means 2 and displays the caution of the drag anchor when the result tells the possibility of the drag anchor. Thus, the discrimination of notification is attained with a simple equipment and proper drag anchor notice information is issued.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to, for example, a prediction device for predicting the wind force and wind direction of a ship anchored in a bay, and particularly for preventing anchor dragging accidents.

[Prior Art] A conventional example will be explained using Tokyo Bay as an example. Because the mouth of Tokyo Bay opens to the south, strong winds tend to gust, especially in the south or southwest.

Looking into past anchor dragging accidents, the wind direction is 5-SW or N-NE.
Dragging anchor accidents occur frequently when the wind is above the wind cuff.

In order to prevent this type of accident, it is necessary to fully understand the geographical characteristics, catch changes in the anchorage area early, pay attention to the issuance of weather warnings, manually investigate past anchor dragging accidents, and issue anchor dragging caution information. Vessels in anchorage areas were ordered to take preventive measures such as keeping an appropriate distance from other vessels or putting their engines on standby early.

[Problem to be solved by the invention] Conventionally, in order to issue anchor-dragging warning information, past case information is manually checked from the wind direction and wind speed obtained from weather information, and the anchor-dragging warning is determined by a skilled judge. Since the information is issued, there is a problem in that it is difficult to issue appropriate anchor dragging warning information without a skilled worker.

This invention was made in order to solve this problem, and it is possible to make a decision to issue anchor dragging warning information using a simple device, without having to manually make the decision to issue the anchor warning information, and without having a skilled worker. The purpose is to obtain an anchor dragging prediction device that can be used.

[Means for Solving the Problems] A dragging anchor prediction device according to the present invention includes an input means for inputting current wind direction and wind force information obtained from a predetermined meteorological point;
a storage means for storing a conversion formula showing the number of anchor dragging accidents in the past due to wind direction and wind power at sea, and the relationship between the wind direction and wind power at a meteorological point; and a conversion formula stored in the storage means based on input from the input means. The wind direction and wind force on the sea are predicted, and based on the predicted wind direction and wind power, the number of anchor dragging accidents in the past corresponding to the wind direction and wind power stored in the storage means is read, and if there is an anchor dragging accident, the anchor is dragged. The system also includes a calculation means for displaying an accident warning.

[Function] In this invention, when the calculation means receives human power from the input means, it predicts the desired sea wind direction and wind force from the conversion formula stored in the storage means based on the input, and Based on the wind direction and wind force, the number of anchor dragging accidents in the past corresponding to the wind direction and wind force stored in the storage means is read, and if there is an anchor dragging accident, an anchor dragging accident warning is displayed.

[Embodiment] FIG. 1 is a schematic diagram of an anchor dragging prediction device showing an embodiment of the present invention, in which (1) is a CPU, (2) is a Cp U (
1) is a memory connected to CPU (1), (3) is a display that displays based on signals from CPU (1), (4) is an input/output interface, and (5> is a keyboard).

The anchor dragging prediction device configured as described above has a keyboard (
5), it outputs a signal to the CPU (1) via the input/output interface (4).

Then, CPU (1) reads this signal and stores it in memory (2).
) executes a process according to a routine stored in the computer to display the corresponding image on the display device (3) via the input/output interface (4).

For example, if a ship is currently anchored off the coast of Yozaki in Tokyo Bay, the memory (2) stores the past number of anchorage accidents in the wind direction and wind speed in the waters off Kawasaki by operating the keyboard (5). Remember.

For example, let us assume that there have been 10 anchor dragging accidents in the past in the waters off Kawasaki when the wind was from the south and the wind speed was 10 m/s, and there were 16 accidents when the wind was from the southwest and the wind speed was 30 m/s.

Figure 2 is a diagram of the case information table, showing the wind direction, wind speed,
This is an example of displaying the number of anchor dragging accidents by situation.

FIG. 3 is a diagram of a sea area information table, and is an example of displaying current sea area information by status.

FIG. 4 is a flowchart for inputting the number of anchor dragging accidents.

It is assumed that only the table shown in FIG. 2 is already displayed on the display (3), and the operation shown in FIG. 4 will be described below.

The keyboard (5) is operated to input the wind direction and wind speed, and also the number of anchor dragging accidents at that time (hereinafter collectively referred to as case information) (S301). In this case, the wind direction in Situation 1 is a southerly wind, the wind speed is 10 m/s, and the number of anchor dragging accidents is 1.
Enter 0 and Situation 2 has southwest wind speed of 30 m/s.
Enter 16 items using s.

Then, CPU (1) stores this, internally converts it, and sets it in memory (2) (referred to as case information setting processing) (S302). Next, this case information is inserted into the stored table (referred to as case information update) (S304)
.

Furthermore, current conditions within the bay are generally not directly available. Therefore, based on past weather results, we can find out what the situation was like in the sea area where the ship is currently anchored in the past, for example, if a wind of 5 m/s or more occurred in the south or southwest wind direction at the mouth of Tokyo Bay. Obtain statistically.

The wind direction and wind speed (
Conversion coefficients and conversion formulas indicating the relationship with sea area information (hereinafter collectively referred to as sea area information) are calculated from the statistics of the sea area, and are stored in the memory (2). In this case, it is assumed that the conversion coefficient for the sea area off the coast of Kawasaki is a, and the conversion formula is obtained as Y-ax.

FIG. 5 is a flowchart for storing conversion coefficients and conversion formulas for current sea area information.

It is assumed that only the table shown in FIG. 3 is already displayed on the display (3), and the operation shown in FIG. 5 will be explained below.

Operate the keyboard (5) to input the conversion coefficient for the sea area. In this case, the conversion coefficient for wind direction is set to 1, and the conversion coefficient for wind speed is set to 2 (3501).

Next, the input ocean area information is stored in the memory (2) and set (referred to as ocean area information setting process) (S503).

Then, the sea area information is inserted into the table (referred to as sea area information update) and stored (3505).

The above process may be newly set, for example, about once a month.

Next, a case in which anchor dragging is predicted on a daily basis will be described below.

FIG. 6 is a flowchart illustrating the operation of the first embodiment regarding anchor dragging prediction, which will be explained below using the figures.

For example, suppose a ship is anchored in Tokyo Bay at the current time, and the wind direction is south or southwest, and the wind speed is 5 m /
Suppose that a radio station that monitors maritime traffic receives a radio message from the Japan Meteorological Agency that a wind of 200 s or more has occurred at the mouth of Tokyo Bay, and then learns whether there is a risk of an anchor dragging accident for ships in the bay at the current time. For this purpose, if the anchor dragging prediction information key (not shown) is pressed by operating the keyboard (5), that signal is output to the CPU (1) via the human output interface (4).

When the CPU (1) receives this signal, the memory (2)
), reads the address and executes the routine specified by the address.

In this case, the user operates the keyboard to input (referred to as situation input) that the wind direction is south and the wind speed is 5 m (S601). Then, the CPU (1) converts the wind direction and wind speed based on the conversion coefficient and conversion formula stored in the memory (2). In this case, the wind speed is set to double, so the wind speed is 10 m.
/s (referred to as situation conversion) (S803)
.

Next, the system reads the past case information of the sea area stored in the memory (2) and judges whether an anchor dragging accident has occurred (referred to as case judgment) (81305). If it has not occurred, display (3) indicates that there is no case (seoe).

Next, if it is determined that there is a case, the display (3) is made to display that there is a case or that caution is required when dragging anchor (8608). Furthermore, current ocean area information may be used supplementarily to issue a warning for anchor dragging. In this case as well, the processing results in FIGS. 4 and 5 and the tables in FIGS. 2 and 3 are used. This anchor dragging prediction will be explained below.

FIG. 7 is a flowchart illustrating a second embodiment of anchor dragging prediction.

The keyboard (5) is assumed to have a sea area information key and an anchor dragging prediction key. Next, if any key is pressed, CPU (1) reads this key force (8
701), determine which key was pressed (S703)
). In this case, it is determined that the ocean area information key has been pressed. Then, a sea area information table is displayed (S705).

Next, when weather information is entered using the keyboard (5), the CPU (1) reads the weather information (S707).
, is converted based on the conversion formula and conversion coefficients stored in memory (2), and stored in memory (1) (S709)
.

In this case, the wind speed is set to double, so the wind speed is 10
converted to m/s.

Then, it is inserted into the sea area information table and the sea area information table shown in FIG. 4 is displayed on the display (3) (S711).

By this process, the wind direction and wind force in the ocean area can be displayed, and by pressing the anchor dragging prediction key, anchor dragging can be reliably predicted.

Next, if the anchor dragging prediction key is pressed, memory (2)
Enter the case information table and ocean area information table (
S730).

Then, the numerical values of wind direction and wind speed inserted in the sea area information table and the wind direction, wind speed, and number of cases in the past case information are checked (S734), and based on the information on the current sea area situation, whether there has been an anchor dragging accident in the past. (hereinafter referred to as case judgment). Using Figures 2 and 3 as an example, in situation 1 of the sea area information table, the wind direction is south and the wind speed is 10 m, and in the case information table, in situation 1, the wind is south and the wind speed is 10 m. Since the number of accidents is 10, it is determined that there are cases (S736). If it is determined that there is a case, indicator 1 will be displayed.
A warning for dragging anchor is displayed (S740). If it is determined that there is no case, a message indicating that there is no case is displayed on the display (7) (9743).

In the above embodiment, a radio station is used to monitor maritime traffic, but the present invention is not limited to this, and a ship in a bay can confirm its own position, past case information and a conversion formula, If the conversion coefficients can be obtained from the radio station, by using the process shown in FIG. 4 or FIG. 7, anchor dragging can be predicted by the own ship.

[Effects of the Invention] As described above, according to the present invention, the wind direction at a predetermined meteorological point in the past and the relational expression with the wind force are stored in the storage means, and the number of anchor dragging accidents at that time is also stored. By inputting the wind direction and wind force at the current meteorological point, the current wind force and wind direction on the sea can be automatically predicted, and an anchor dragging warning can be issued early.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram of an anchor dragging prediction device showing an embodiment of the present invention, Fig. 2 is a display example of a case information table, Fig. 3 is a display example of a sea area information table, and Fig. 4 is an anchor dragging accident accident. FIG. 5 is a flowchart for storing the conversion coefficient and conversion formula for current sea area information. FIG. 6 is a flowchart for explaining the operation of the first embodiment regarding anchor dragging prediction. FIG. It is a flowchart explaining the 2nd example about anchor dragging prediction. In the figure, (1) is the CPU, (2) is the memory, and (3)
is the display, (4) is the input/output interface, and
Figure 3: Flowchart for inputting the number of foot anchor accidents Figure 4: Flowchart explaining the example Figure 7 of the flow engineer's yard explaining the second example of eruption.

Claims (1)

[Claims] (1) An input means for inputting current wind direction and wind force information obtained from a predetermined meteorological point, and a relationship between the number of anchor dragging accidents at sea in the past due to wind direction and wind power, and the wind direction and wind force at the said meteorological point. a storage means for storing a conversion formula stored in the storage means, based on the input from the input means, predicting the wind direction and wind force on the ocean using the conversion formula stored in the storage means, and based on the predicted wind direction and wind power; , a calculation means for reading the number of anchor dragging accidents in the corresponding past wind direction and wind force stored in the storage means, and displaying an anchor dragging accident caution if there is an anchor dragging accident; Anchor prediction device.