JP2008281504A - Navigation aid device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To read information about a target object during capture and tracking also from display contents of a partially enlarged display section, and to specify a target object or a target mark to be captured and tracked also by operation on the partially enlarged display section. <P>SOLUTION: A target mark Mt1 about the selected target object or target is displayed on a normal magnification display section Dn, and a target mark Mt2 is displayed on the partially enlarged display section De. When a plurality of target objects and target marks are displayed on the partially enlarged display section De, the selected target object is changed by selecting a desired target object or target mark in the partially enlarged display section De. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a navigation assistance device that particularly enlarges and displays a predetermined range in a radar device that detects a target existing in a detection area, a plotter device that displays the position of a ship or other ship, and the like.

  Conventionally, Patent Documents 1 to 3 disclose radar devices having an enlarged display mode in which detection data displayed by a radar is displayed in an enlarged manner from a normal display magnification.

  When the enlargement mode is designated, the radar apparatus of Patent Literature 1 enlarges the image at a predetermined magnification, and shifts and displays the entire image so that the designated position coincides with the center of the display screen. It is configured. By doing so, it is possible to grasp in detail the state of the surrounding target centering on the designated position.

  The radar device of Patent Document 2 displays a target object in a partially enlarged manner by designating an area to be enlarged and an area to display an enlargement result in an image memory for storing detected image data. A configuration is shown in which an enlarged image of a target is displayed in real time without changing the detection range and own ship position on the screen.

  The radar apparatus of Patent Literature 3 includes a capture tracking unit that captures and tracks the position of a target, a target designation unit that designates a predetermined target among the targets being captured and tracked, and a specified target Means for enlarging and displaying a region including a position, and by selecting a predetermined target from a plurality of targets that have been captured and tracked as targets to be noted in advance, The surroundings can be easily monitored.

FIG. 1 is a display example of the display screen of the radar apparatus of Patent Document 3. The state shown in FIG. 1 (A) is a state in which the vicinity of a target that is captured and tracked by an ARPA (Automatic Radar Plotting Aids) function is specified. is there. Here, A is a display portion of the entire radar detection area, and T is one target displayed in the radar detection area. FIG. 1B shows a display example after the target number 10 is designated. Here, Z is an enlarged display section. C is a circular mark indicating an enlarged area to be enlarged. In the enlarged display portion Z, the echo of the target with the target number 10 is enlarged and displayed.
Japanese Patent Laid-Open No. 5-188134 JP 2002-296341 A JP 2002-31127 A

  However, in the conventional radar apparatus disclosed in Patent Documents 1 to 3, only the echo image is displayed on the enlarged display unit, and the target by ARPA or AIS (Automatic Identification System) The mark was not displayed on the enlarged display area. Further, for example, when a target to be captured / tracked is designated, it can be selected only in a display area displayed at a normal magnification. Therefore, in order to change the target for the enlarged display, it is necessary to temporarily turn off the enlarged display mode.

  The above-mentioned problem is not limited to the radar device, and similarly occurs when the position of another ship is displayed in a plotter device or the like that displays the track of the ship.

  An object of the present invention is to enable reading of information on a target being captured / tracked from the display content of the partial enlarged display portion, and to specify a target to be captured / tracked by an operation on the partial enlarged display portion. The object is to provide a navigation assistance device that is made possible.

In order to solve the above problems, the present invention is configured as follows.
(1) Navigation provided with image display means for displaying an image of a range including the positions of own ship and other ships on a display screen, and target mark display means for displaying information relating to other ships as target marks on the display screen. In the aid device,
The image display means is a normal magnification display means for displaying an image within the range at a normal magnification on the display screen, and a partial enlarged display means for displaying an image within the range at a predetermined position in the display screen at an enlargement magnification. And consisting of
The target mark display means includes first target mark display means for displaying the target mark at a corresponding position within the range displayed by the normal magnification display means, and within a display range displayed by the partial enlargement display means. Second target mark display means for displaying the target mark at the corresponding position.

(2) Image display means for displaying an image of a range including the positions of the own ship and other ships on the display screen, designation means for designating the other ship displayed on the display screen by the image display means, In a navigation assistance device comprising a capture / tracking means for capturing / tracking another ship designated by a designation means,
The image display means is a normal magnification display means for displaying an image within the range at a normal magnification on the display screen, and a partial enlarged display means for displaying an image within the range at a predetermined position in the display screen at an enlargement magnification. And consisting of
The designation means designates another ship by selecting a normal magnification display section designating means for specifying another ship by selecting another ship displayed by the normal magnification display means, and selecting another ship displayed by the partial enlarged display means. And a partially enlarged display portion designating means.

(3) Provided with a target detection means for detecting a target existing in the detection area,
The image display means includes means for displaying the detection data of the target in the detection area detected by the target detection means on a display screen. For example, an echo of a target detected by the radar is displayed.

  (4) The target mark display means displays information on the target obtained from the relative position change of the target detected by the target detection means as a target mark on the display screen. For example, an ARPA unit is provided, and the moving speed and moving direction of the target are obtained based on the relative position change of the target detected by the radar with respect to the ship, and are displayed as target marks.

  (5) The target mark display means displays information on the other ship obtained by receiving the ship automatic identification signal transmitted from the other ship as a target mark on the display screen. For example, a ship identification signal transmitted from an AIS mounted on another ship is received, and information on the position, course, heading, ship speed, etc. regarding the other ship is displayed as a target mark.

According to the present invention, the following effects can be obtained.
(1) According to the first aspect of the present invention, the normal magnification display means displays the range image including the positions of the ship and the other ship on the display screen at the normal magnification, and the partial enlargement display means displays the range image. It is displayed at a predetermined position in the display screen at a predetermined magnification. Then, the first target mark display means displays the target mark so as to overlap the corresponding position within the range displayed by the normal magnification display means, and the second target mark display means displays it by the partially enlarged display means. Target marks are displayed overlaid at corresponding positions within the display range. As a result, for the target in the partial enlarged display section, information such as the position, heading, and speed of the target is displayed with the target mark, making it easy to compare with the display contents on the normal magnification display section. Thus, it becomes easy to grasp the display content of the display screen.

  (2) According to the invention of claim 2, the image of the range including the positions of the ship and the other ship is displayed at the normal magnification on the display screen by the normal magnification display means, and the image of the range is displayed by the partial enlargement display means. It is displayed at a predetermined position in the display screen at a predetermined magnification. Then, the other magnification displayed by the normal magnification display means is selected by the normal magnification display section designation means, and the other ship displayed by the partial magnification display means is selected by the partial magnification display section designation means. In addition to specifying other ships that are displayed at normal magnification, other desired ships can be specified for other ships that are partially enlarged, and acquisition and tracking of new other ships can be started. .

  (3) According to the invention of claim 3, the target existing in the detection area is detected by the target detection means, and the detection data is displayed on the display screen by the image display means. The present invention can be applied to a device that displays an image of a detected target.

  (4) According to the invention according to claim 4, information on the target is obtained from the relative position change of the target detected by the target detection means with respect to the ship, and the target mark corresponding to the information is the target mark. Since it is displayed on the display screen by the display means, the target detected and tracked by the radar method can be easily read by the target mark. For example, the moving speed and moving direction of the target obtained by the ARPA unit are displayed as target marks within the range displayed by the normal magnification display means or the display range displayed by the partial enlargement display means. The position and movement of the target can be easily read.

  (5) According to the invention according to claim 5, the information about the other ship obtained by receiving the ship automatic identification signal by AIS or the like transmitted from the other ship is within the range displayed by the normal magnification display means. Alternatively, since it is displayed as a target mark within the display range displayed by the partial enlarged display means, the position and movement of the other ship can be easily read.

<< First Embodiment >>
A radar apparatus according to a first embodiment of the present invention will be described with reference to the drawings.
FIG. 2 is a diagram showing a display example of the display screen of the radar apparatus according to the first embodiment of the present invention. The display screen has several display areas (display units). The main display units are a normal magnification display unit Dn, a partial enlarged display unit De, a mark data display unit Dc, and a target data display unit Dt.

  The normal magnification display portion Dn displays the target mark Mt1 and the like of another ship. The partial enlarged display portion De displays the partial magnification display portion Dn so as to partially overlap. In this example, the range indicated by the enlarged display range mark Md is enlarged and displayed in the normal magnification display portion Dn. The target mark Mt2 in the partial enlarged display portion De is a mark of the same target (other ship) as the target mark Mt1 in the normal magnification display portion Dn.

  Although the illustration of the echo image of the target is omitted in FIG. 2, the target marks Mt1 and Mt2 are displayed superimposed on the echo image of the target.

  In the partial enlarged display portion De, the range indicated by the enlarged display range mark Md designated in the normal magnification display portion Dn is displayed twice (4 times in area). However, the target mark is displayed in the same size as the target mark in the normal magnification display portion Dn. This eliminates the inconvenience that the echo image is hidden by a large target mark.

  In the example shown in FIG. 2, the partial enlarged display portion De is arranged on the left side of the display screen. However, for example, when the target mark Mt1 exists on the left side of the normal magnification display portion Dn, the partial enlarged display portion De is displayed on the display screen. Arranged on the right side, display control is performed so that the partial enlarged display section De does not block the target echo and target mark display in the normal magnification display section Dn.

  The mark data display section Dc displays a value related to the position / speed of the ship, the position of the cross cursor, the target value, and the like.

  The target data display unit Dt displays data related to the selected target. For example, the vector reference is true (TRUE), the MMSI number (identification number uniquely assigned to the AIS target), the ship name (NAME), and the like.

  FIG. 3 shows a display example of the target mark. Here, FIG. 3A shows a target mark of a target (pause target) that has not been tracked or cannot be tracked and whose heading or course is unknown.

  FIG. 3B is a target mark of a target being tracked (activated target), and the heading is indicated by a solid straight line extending from the tip of the triangular mark, and the course is indicated by a broken straight line. Further, the length of the broken straight line represents the moving distance after a predetermined time.

  Regarding the target being tracked, the AIS information and the ARPA information are held together by associating the MMSI number of the AIS and the identification number given by the ARPA unit described later for each target.

  FIG. 3C shows a target mark of a target that is being tracked and selected as a target to be enlarged, and is further added with a mark Mts that surrounds a rectangle in the state shown in FIG. . The target marks Mt1 and Mt2 shown in FIG. 2 are the target marks being selected.

  In this way, by displaying the selected target marks Mt1 and Mt2 on both the normal magnification display portion Dn and the partial enlarged display portion De shown in FIG. 2, it is possible to easily grasp that the two are in a correspondence relationship. It becomes like this.

FIG. 4 shows the transition of the display position of the target mark Mt1 and the enlarged display range mark Md in the normal magnification display section Dn shown in FIG. Since the target indicated by the target mark Mt1 is the target being selected, the display position of the target mark Mt1 moves on the normal magnification display portion Dn with the movement of the relative position. Along with this, the enlarged display range mark Md is also moved because the target mark Mt1 is displayed at the center of the enlarged display range mark Md.
On the other hand, even with such movement of the selected target, the target mark Mt2 of the selected target is always displayed at the center of the display in the partial enlarged display portion De shown in FIG.

  FIG. 5 is a block diagram showing the configuration of the entire radar apparatus. In FIG. 5, the antenna unit 1 includes a radar antenna and a transmission / reception unit. The AD converter 2 samples the video signal at the timing of the distance clock and converts it into digital data in synchronization with the transmission trigger signal from the antenna unit 1. The primary memory 3 stores data for one sweep. The drawing address generation circuit 4 receives the antenna azimuth signal and the bow line signal from the aerial unit 1, converts the contents of the primary memory 3 from polar coordinates to orthogonal coordinates, and writes them to the normal magnification display unit display memory 5. Address signal is generated. The selector 16 switches the address signal for the display memory 5.

  The ARPA unit 8 inputs an azimuth signal, a bow line signal, a trigger signal, and a video signal from the aerial unit 1, and also inputs an azimuth reference signal that is a bow direction from a gyrocompass, etc. Extract, capture and track position.

  The CPU 9 inputs an azimuth reference signal from the gyrocompass or the like, and controls according to the display mode for displaying the reference azimuth above the display screen. That is, the read address for each display memory 5, 6, 13, 21 is controlled by the control of the display address generation circuit 15. Thereby, according to the display mode, control is performed so that any one of north, bow direction, and heading direction is displayed upward.

  Further, the CPU 9 uses the selector 18 to display data for displaying a mark (target mark Mt1) indicating the target being captured / tracked based on the position data of the target captured / tracked by the ARPA unit 8. To the normal magnification display portion mark display memory 13. The selector 18 switches the address signal for the normal magnification display portion mark display memory 13.

  Further, the CPU 9 gives a drawing address at the time of drawing in the partial enlarged display portion mark display memory 21 via the selector 20 and also shows a mark (indicating a target being captured / tracked) in the partial enlarged display portion mark display memory 21. A target mark Mt2) is drawn. The selector 20 switches an address signal for the mark display memory 21 for the partial enlarged display section.

  The CPU 9 reads the operation of the operation element 10 such as a trackball or a touch panel, and moves the cross cursor or switches various modes.

  Further, the CPU 9 reads the AIS reception signal from the AIS receiver and writes the target mark into the normal magnification display portion mark display memory 13 and the partial enlargement display portion mark display memory 21 according to the position of the target.

  The mark display memory 21 for the partial enlarged display unit holds display data of the target mark on the partial enlarged display unit.

  The read address generation circuit 14 sequentially generates addresses of areas to be enlarged in the display data written in the display memory 5. The partial enlarged display portion drawing address generation circuit 7 generates an address to which the data of the normal magnification display portion display memory 5 addressed by the read address generation circuit 14 is written in the partial enlarged display portion display memory 6. To do. By the address generation of the read address generation circuit 14 and the partial enlarged display portion drawing address generation circuit 7, a predetermined area in the normal magnification display portion display memory 5 is enlarged and copied to the partial enlarged display portion display memory 6. The selector 17 switches an address signal for the partial enlarged display portion display memory 6.

  The display address generation circuit 15 generates a display read address signal for the normal magnification display unit display memory 5 via the selector 16, and displays the display read for the partial enlarged display unit display memory 6 via the selector 17. An address signal is generated, a display read address signal is generated for the normal magnification display unit mark display memory 13 via the selector 18, and similarly, a display for the partial enlarged display unit mark display memory 21 is performed via the selector 20. A read address signal is generated.

  The video composition circuit 11 is read from the display memory 5 for normal magnification display, the display memory 6 for partial enlarged display, the mark display memory 13 for normal magnification display, and the mark display memory 21 for partial enlarged display, respectively. The data is synthesized and output to the display device 12 as a display signal. The display 12 performs one screen display based on this display signal.

6 to 8 are flowcharts showing the main processing contents of the CPU 9 shown in FIG.
FIG. 6 is a flowchart regarding the input process of the operator 10. First, the input of the operator 10 is read (S11). If the zoom mode (any one of the relative mode, the true mode, and the target mode) is selected, the state is stored (S12 → S13). Each of these modes will be described later.

  If the cross cursor is moved and displayed by the operation of the operation element 10 and an operation for specifying the position of the cross cursor is performed, a position specifying process described later is performed (S14 → S15).

  When the zoom on / off selection operation is performed, display on / off of the partial enlarged display section (De shown in FIG. 2) is switched (S16 → S17).

  If the operation is other, processing corresponding to the operation is performed (S18).

  FIG. 7 is a flowchart of the position designation process in step S15 shown in FIG. First, in the true mode and when the cross cursor is in the partial enlarged display portion, (latitude, longitude) corresponding to the position of the cross cursor is calculated and stored (S21 → S22 → S23). When the cross cursor is in the normal magnification display section, (latitude, longitude) corresponding to the position of the cross cursor is calculated and stored (S22 → S24). And the predetermined range centering on the position is displayed on a partial expansion display part (S25).

  In the relative mode and when the cross cursor is in the partial enlarged display portion, the position of the cross cursor is calculated as a relative position (direction and distance from the ship) and stored (S26 → S27). → S28). Further, when the cross cursor is in the normal magnification display section, the position of the cross cursor is calculated as a relative position with respect to the own ship and stored (S27 → S29). Then, a predetermined range centered on the relative position is displayed on the partial enlarged display section (S30).

  Further, when the target mode is set and the cross cursor is in the partial enlarged display portion, the position and target ID of the target (echo) or target (target displayed by the target mark) designated by the cross cursor Is stored (S31 → S32). Further, when the cross cursor is in the normal magnification display section, the target (echo) designated by the cross cursor or the position of the target and the target ID are stored (S31 → S33). Then, a predetermined range centered on the position of the target is displayed on the partial enlarged display section (S34).

Note that the target mark is not displayed for targets that have not yet been captured and tracked by the ARPA unit 8 or other ships for which the AIS receiver has not received the AIS signal. Is specified, the instruction to capture and track the target is given to the ARPA unit 8, and the target ID newly given by the ARPA unit 8 is received and stored.
Thereafter, the target at the designated position is set as the selected target (S35).

  FIG. 8 is a flowchart regarding display of target marks. First, target information is read from the ARPA unit 8 shown in FIG. 5 (S41). Further, an AIS reception signal is input from an external AIS receiver (S42). Then, displayable target marks are displayed on the normal magnification display section Dn (S43). Further, displayable target marks are displayed on the partial enlarged display section De (S44). In this way, the target mark is displayed based on the latest target information. Steps S43 and S44 correspond to the target mark display means according to claims 4 and 5.

  As described above, for the target in the partially enlarged display section, information on the position, heading, ship speed, etc. regarding the target is displayed with the target mark, so comparison with the display contents on the normal magnification display section This makes it easier to grasp the display contents on the display screen. In addition to specifying the target displayed at normal magnification, it is also possible to specify a desired target for a target or target mark that is displayed in a partially enlarged manner, and to capture and track a new target. Can start.

<< Second Embodiment >>
A plotter device according to a second embodiment of the present invention will be described with reference to the drawings.
FIG. 9 is a view showing a display example of the display screen of the plotter device (track display device) according to the second embodiment of the present invention. The display screen has several display areas (display units). The main display units are a normal magnification display unit Dn and a partial enlarged display unit De.

  The normal magnification display portion Dn displays a nautical chart (coast line) CL, own ship mark Ms, destination marks Mp1, Mp2, target marks Mt3 of other ships, and the like. The partial enlarged display portion De displays the partial magnification display portion Dn so as to partially overlap. In this example, the range indicated by the enlarged display range mark Md is enlarged and displayed in the normal magnification display portion Dn. The target mark Mt4 in the partial enlarged display portion De is a mark of the same target (other ship) as the target mark Mt3 in the normal magnification display portion Dn. In this example, a straight route T connecting the destination marks Mp1 and Mp2 is also displayed in the partial enlarged display portion De.

FIG. 10 is a block diagram showing the entire configuration of the plotter device. In FIG.
The GPS receiver 21 measures the position of the ship, and the AIS receiver 22 receives an AIS signal transmitted from another ship. The CPU 24 reads the position information of the ship from the GPS receiver 21 and reads information such as the position of the other ship from the AIS receiver. Further, the CPU 24 reads the operation of the operation element 23 such as a trackball or a touch panel, and moves the cross cursor or switches various modes.

  The display memory 25 is a memory that holds display data to be displayed on the display screen of the display device 27. The CPU 24 writes display data corresponding to the display contents in the display memory 25.

  The video circuit 26 generates a display signal corresponding to the contents of the display memory 25 and outputs it to the display device 27. Thereby, the display device 27 displays an image corresponding to the display data written in the display memory 25.

  FIG. 11 is a flowchart showing the main processing contents of the CPU 24 shown in FIG. First, the position of the ship is read from the GPS receiver 21, display data is created according to the display scale ratio and display mode (north-up mode, head-up mode, course-up mode, etc.) and written into the display memory 25. . This display data includes nautical charts such as coastlines and latitude / longitude lines, own ship marks, destination marks, and wakes.

  The other operation input process is the same as that shown in FIG. Further, the position designation process is the same as that shown in FIG. further. The processing related to target mark display is the same as that shown in FIG. However, unlike the case of the first embodiment, the plotter device according to the second embodiment does not include an ARPA unit. Therefore, based on the signal received from the AIS receiver 22, the CPU 24 processes the other ship. Perform tracking. For this reason, in the position designation process in the target mode shown in FIG. 7, a target ID is assigned to the target for which the position has been designated, and a partial enlarged display section centered on the target is displayed.

  Note that in a multi-function peripheral in which a radar having an ARPA function and a plotter are connected by a LAN or the like, ARPA information may be displayed on the plotter.

  As described above, for other ships in the partially enlarged display section, information on the position, heading, ship speed, etc. regarding other ships is displayed with the target mark, so comparison with the display contents on the normal magnification display section is possible. It becomes easy and it becomes easy to grasp the display contents of the display screen. In addition to specifying target marks that are displayed at normal magnification, you can also specify desired targets for partially enlarged target marks, and start capturing and tracking new targets. Can do.

FIG. 10 is a diagram illustrating a display example of a display screen of a radar apparatus disclosed in Patent Document 3. It is a figure which shows the example of a display of the display screen of the radar apparatus which concerns on 1st Embodiment of this invention. It is a figure which shows the example of a display of a target mark. It is a figure which shows the example of the display position transition of the target mark in a normal magnification display part. It is a block diagram which shows the structure of the radar apparatus. It is a flowchart which shows the process sequence of CPU. It is a flowchart which shows the process sequence of CPU. It is a flowchart which shows the process sequence of CPU. It is a figure which shows the example of a display of the display screen of the plotter apparatus which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the structure of the plotter apparatus. It is a flowchart which shows the process sequence of CPU of the same plotter apparatus.

Explanation of symbols

Dn—Normal magnification display portion De—Partial enlarged display portion Dc—Mark data display portion Dt—Target data display portion Md—Enlarged display range mark Mt—Target mark

Claims (5)

In a navigation assistance device comprising image display means for displaying an image of a range including the positions of own ship and other ships on a display screen, and target mark display means for displaying information relating to other ships as target marks on the display screen. ,
The image display means is a normal magnification display means for displaying an image within the range at a normal magnification on the display screen, and a partial enlarged display means for displaying an image within the range at a predetermined position in the display screen at an enlargement magnification. And consisting of
The target mark display means includes first target mark display means for displaying the target mark at a corresponding position within the range displayed by the normal magnification display means, and within a display range displayed by the partial enlargement display means. A navigation aid device comprising: second target mark display means for displaying the target mark at a corresponding position. Image display means for displaying an image of a range including the positions of the own ship and other ships on a display screen, designation means for designating another ship displayed on the display screen by the image display means, and the designation means In a navigation assistance device having a capture / tracking means for capturing / tracking a designated other ship,
The image display means is a normal magnification display means for displaying an image within the range at a normal magnification on the display screen, and a partial enlarged display means for displaying an image within the range at a predetermined position in the display screen at an enlargement magnification. And consisting of
The designation means designates another ship by selecting a normal magnification display section designating means for specifying another ship by selecting another ship displayed by the normal magnification display means, and selecting another ship displayed by the partial enlarged display means. A navigation assistance device comprising: a partial enlarged display portion designating means. A target detection means for detecting a target existing in the detection area;
The navigation assistance apparatus according to claim 1 or 2, wherein the image display means includes means for displaying detection data of a target in the detection area detected by the target detection means on a display screen.   The target mark display means displays information on the target obtained from the relative position change of the target detected by the target detection means with respect to the ship as a target mark on the display screen. The navigation assistance device described in 1.   The said target mark display means displays the information regarding the other ship obtained by receiving the signal for ship automatic identification transmitted from another ship on the said display screen as a target mark. The navigation aid device described.

Images