JP2000142570A - Navigation supporting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the labor required for operating a ship by a ship operator. SOLUTION: A navigation support device 10 is provided with a CD-ROM drive 12 to read a chart C containing the position Pb of a bridge B and the height Hb of the bridge B above the water level L which are recorded in the CD-ROM 11 as the chart data Dc, and a navigation device 14 to detect the position Ps of a ship S. The navigation support device 10 is also provided with a control device 16 to judge whether the ship S can pass below the bridge B from the height Hsb of the ship S above the water level L stored in a RAM 22 and the height Hb of the bridge B above the water level L, and a display 24 to indicate the position Ps of the ship S and the chart C, etc., around the position Ps of the ship S including the bridge B. In the display 24, the bridge B below which the ship S can pass, and a bridge B' below which the ship can not pass are displayed in a visually separated manner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation support device for assisting a ship operator in maneuvering a ship.

[0002]

2. Description of the Related Art Conventionally, when a ship tries to sail on a channel such as a bridged river, the operator of the ship is required to:
It was necessary to determine whether the vessel could pass under the bridge. For this purpose, for example, a ship operator checks the position of the bridge and the height from the water surface in advance, and compares these with the height from the water surface of the ship to specify a bridge that cannot be passed. A technique was used.

[0003]

However, in the method according to the prior art described above, the ship operator determines whether or not a ship can pass under all the bridges on the navigation route. There is a need. Such an operation requires enormous time and labor, and is a heavy burden on the ship operator.

[0004] The present invention has been made in consideration of such problems, and has as its object to provide a navigation support device capable of reducing the labor required for a ship operator to maneuver a ship.

[0005]

In a navigation support apparatus according to the present invention, a calculating means includes a height of a vessel from the water surface stored in a vessel information storage means and a bridge height stored in a navigation information storage means. It is configured to determine whether the vessel can pass through the bridge based on the height from the water surface. The display means is configured to display the position of the ship detected by the position detecting means, and the position of the navigation route and the position of the bridge relative to the position of the ship. In this case, the display means displays the result of the determination by the calculation means as to whether the ship can pass through the bridge (the invention according to claim 1). Specifically, the display means is configured to visually distinguish and display a bridge through which the ship can pass and a bridge through which the ship cannot pass (the invention according to claim 2).

[0006] With this configuration, the operator of the ship can visually and easily confirm whether or not there is a bridge on the passage that the ship cannot pass when operating the ship. . Accordingly, the labor required for the boat operator to operate the boat is reduced.

Further, the calculating means determines whether or not the ship is approaching the impassable bridge based on the position of the ship and the position of the bridge (the invention according to claim 3). When the ship is approaching the impassable bridge, a warning is displayed on the display means (the invention according to claim 4), and a warning is issued from the warning means (claim). Item 5)).

The height of the vessel from the water surface is subtracted from the height of the vessel stored in the vessel information storage means by the calculation means by the draft which is also stored in the vessel information storage means. In this case, the information may be stored in the ship information storage means (the invention according to claim 6).

[0009]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a configuration of a navigation support apparatus 10 to which an embodiment of the present invention is applied. FIGS. 2A and 2B show a ship S and a bridge B to be referred to in the following description.
The positional relationship with is shown.

[0011] The navigation support apparatus 10 is provided with a ship S
For supporting the ship maneuvering operation of the ship S
For example, it is installed in a wheelhouse.

The navigation support apparatus 10 is a recording medium in which a navigation map C (see FIG. 3 described later) is digitized and recorded as navigation map data Dc, for example, a CD-ROM (route information storage means) 11. A CD-ROM drive 12 for reading the route map data Dc from a navigation device (for example, GP)
S receiver, also referred to as position detection means. ) 14 and a control device 16 to which the CD-ROM drive 12 and the navigation device 14 are connected.

The route map data Dc includes FIG. 2A and FIG.
As shown in B, the position of the channel R, the bridge B on the channel R
, The height Hb of the bridge B from the water surface L, and the like. When the route R is close to the sea and is a canal or the like that can be affected by the tide, it is preferable to use the value at the time of high tide as the height Hb of the bridge B from the water surface L.

The GPS receiver as the navigation device 14 is a GPS receiver.
An apparatus configured to receive a radio wave emitted from a GPS satellite group constituting a PS system, measure the arrival time of the radio wave, and calculate a distance from the GPS satellite group to know its own position. It is.

Note that a DGPS receiver may be used as the navigation device 14. The DGPS system to which the DGPS receiver is applied corrects the position of the DGPS receiver detected based on radio waves emitted from a GPS satellite constellation by radio waves emitted from a DGPS station installed on the ground. Thus, the system can improve the position detection accuracy.

As shown in FIG. 1, the control unit 16 is a central processing unit and has a CPU 20 functioning as an arithmetic unit.
A ROM as storage means (memory) for storing system programs, application programs, and the like; a RAM 22 as storage means (memory) used for work and the like, functioning as ship information storage means; It is constituted by a microcomputer including an input / output interface of a timer (time measuring means), an A / D converter, a D / A converter, and the like.

From the CD-ROM drive 12 to the control device 1
The route map data Dc supplied to 6 is stored in the RAM 22. In the CD-ROM drive 12,
The route map data Dc around the position Ps of the ship S may be read from the CD-ROM 11 based on the position Ps of the ship S.

Further, the navigation support device 10 has an input device 18 for inputting information on the ship S. As shown in FIG. 2B, the information on the ship S
(Vertical distance from the lowermost surface to the uppermost surface of the ship S) H
sa, draft (vertical distance from the lowermost surface of the ship S to the water surface L) D, and the like. As shown in FIG.
The information on the ship S input by the ship operator from
It is supplied to the control device 16. And the control device 16
By subtracting the draft D from the height Hsa of the ship S, the height Hsb of the ship S from the water surface L is determined (see FIG. 2B). The height Hsa, the draft D and the height Hsb of the boat S from the water surface L of the boat S are stored in the RAM 22 and a hard disk (not shown) which is a recording medium that retains the recorded contents even when the power is turned off. Zu). In this case, the RAM 22 and the hard disk may be referred to as ship information storage means.

The CPU 20 of the control device 16 specifies the bridge B through which the ship S passes from the position Ps of the ship S and the position Pb of the bridge B. In addition, the CPU 20 determines the water level L of the ship S.
By comparing the height Hsb of the bridge S with the height Hb of the bridge B from the water surface L, it is determined whether or not the ship S can pass through the bridge B.

A display (display means) 24 is connected to the control device 16. As shown in FIG. 3, the display 24 displays the position Ps of the ship S and a route map C around the position Ps. On the navigation map C, a navigation route R (indicated by a two-dot chain line in FIG. 3), a bridge B, and the like are located at a position Ps of the ship S.
Relative to. Display 2
In FIG. 4, a traveling direction d (indicated by an arrow in FIG. 3), a wake e (indicated by a dotted line in FIG. 3) and the like of the ship S are shown in a navigation map C.
Are shown corresponding to.

On the display 24, a bridge B 'determined by the control device 16 to be inaccessible to the ship S.
Is visually distinguished from the other bridges B. Specifically, as shown in FIG. 3, a display method of changing the display color of the bridge B 'with respect to the bridge B, a display method of blinking the display portion of the bridge B', and the like are employed.

Further, an alarm device (alarm means) 26 is connected to the control device 16. This alarm device 26
The PU 20 is configured to emit a warning sound when it is confirmed that the ship S has approached within a predetermined distance from the impassable bridge B '. At the same time when the alarm device 26 emits an alarm sound, an alarm is displayed on the display 24.

Next, the control processing mainly by the control device 16 in the navigation support device 10 shown in FIG.
This will be described with reference to the flowchart shown in FIG.

For example, the power unit (not shown) of the ship S is O
When the state is set to N and the navigation support device 10 is started, the control device 16 first takes in the position Ps of the ship S from the navigation device 14 (step S1).

Subsequently, the route map data Dc is read from the CD-ROM 11 by the CD-ROM drive 12 and stored in the RAM 22. In this case, CD-ROM
The drive 12 may read out the route map data Dc related to the vicinity of the position Ps of the ship S from the CD-ROM 11 based on the position Ps of the ship S and store the data in the RAM 22.

On the display 24, the route map C including the route R, the bridge B, etc. is displayed on the basis of the route map data Dc.
Is displayed relative to the position Ps of the ship S (step S2). At this time, the CPU 2 of the control device 16
At 0, it is determined whether or not the ship S can pass through the bridge B displayed on the display 24. This determination is specifically made by comparing the height Hsb of the ship S from the water surface L with the height Hb of the bridge B from the water surface L. Then, on the display 24, the bridge B 'which cannot pass is visually distinguished from the bridge B which can pass.

Next, it is determined whether or not the ship S is approaching the impermeable bridge B '(the ship S has intruded within a predetermined distance from the bridge B') (step S3).
If the result of the determination in step S3 is negative (NO: the ship S has not approached the bridge B 'that cannot pass), the process returns to step S1. On the other hand, if the result of the determination in step S3 is affirmative (YES: the ship S is approaching the impassable bridge B '), then the process of step S4 is performed.

In step S4, an instruction to issue an alarm sound is issued to the alarm device 26, and an instruction to display an alarm is issued to the display 24. After the process of step S4 is completed, the process returns to step S1.

As described above, according to the above-described embodiment,
On the display 24, the position Pb of the bridge B on the route R of the ship S is displayed relatively to the position Ps of the ship S, and the bridge B 'through which the ship S cannot pass is The bridge B is visually distinguished from the bridge B that can be passed. For this reason, when maneuvering the ship S, the ship operator can easily visually confirm whether or not there is a bridge B 'on the route R in which the ship S cannot pass. Therefore, the labor required when the boat operator operates the boat S is reduced.

It should be noted that the present invention is not limited to the above-described embodiment, but can adopt various configurations without departing from the gist of the present invention.

[0031]

According to the present invention, when a ship operator performs a ship maneuvering operation, a bridge through which the ship cannot pass can be easily visually confirmed, thereby reducing the labor required for the ship maneuvering operation. It is reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a navigation support device to which an embodiment of the present invention is applied.

2A is a diagram showing a horizontal positional relationship between a ship on which the navigation support device shown in FIG. 1 is mounted and a bridge through which the ship passes, and FIG. 2B is a diagram showing the positional relationship in FIG. FIG. 4 is a diagram showing a vertical positional relationship between a ship on which the navigation support device is mounted and a bridge through which the ship passes.

FIG. 3 is a view showing a display screen of a display constituting the navigation support device shown in FIG. 1;

FIG. 4 is a flowchart mainly showing processing in a control device of the navigation support device shown in FIG. 1;

[Explanation of symbols]

REFERENCE SIGNS LIST 10 navigation support device 11 CD-ROM (route information storage means) 12 CD-ROM drive 14 navigation device (position detection means) 16 control device 18 input device 20 CPU (calculation means) 22 RAM ( Ship information storage means) 24 Display (display means) 26 Alarm device (alarm means) B, B '... Bridge R ... Channel Ps ... Position S ... Ship

Claims (6)

[Claims] 1. Position detecting means for detecting a position of a ship, and route information storage means for storing route map data including a position of a route, a position of a bridge on the route, and a height of the bridge from the water surface. A ship information storage means in which the height of the ship from the water surface is stored, and the ship can pass through the bridge based on the height of the bridge from the water surface and the height of the ship from the water surface. Calculating means for determining whether or not there is, and display means for displaying the position of the ship and displaying the position of the navigation route and the position of the bridge relative to the position of the ship, the display means The navigation support device displays a result of the determination by the calculation means as to whether the vessel can pass through the bridge. 2. The navigation support device according to claim 1, wherein the display means visually distinguishes and displays a bridge through which the ship can pass and a bridge through which the ship cannot pass. 3. The apparatus according to claim 1, wherein the calculating means determines whether the ship is approaching the impassable bridge based on the position of the ship and the position of the bridge. A navigation support device characterized by making a judgment. 4. The navigation support device according to claim 3, wherein the display means displays an alarm when the vessel is approaching the impassable bridge. 5. The navigation support device according to claim 3, further comprising alarm means for issuing an alarm when the ship approaches the impassable bridge. 6. The apparatus according to claim 1, wherein a height and a draft of the vessel are stored in the vessel information storage means, and the height of the vessel from the water surface is the height. A navigation support device, which is obtained by subtracting the draft from the height of the vessel in a calculation means and stored in the vessel information storage means.