JPS6069511A - Track recorder - Google Patents

Abstract

PURPOSE:To display the direction of the relative position relation between a current position and its display range on a display screen with a mark or characters by calculating the display range on the basis of the latitude and longitude of the center position of the screen and the representative fraction of the screen and also deciding on the relative position relation as to a track recorder which displays position data obtained by a navigation device such as a loarn receiver, omega receiver, and NNSS receiver. CONSTITUTION:Receive data from a selected navigation device is fetched and written in memory #0 at interval of time (t). A representative fraction (s) and a center position (c) are read out of an area to calculate the current display range. Then, the stored data is displayed on a CRT2. When the current position indicated by P is within the display range of a sea area A, the mark MK of an arrow is displayed facing up and left when the position P is in the left upper direction on the basis of the display range of a sea area B.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical field This invention is applicable to a Loran receiver, Omega receiver or NN5S.
Accumulates position data obtained from navigation devices such as receivers,
This invention relates to an improvement in a track recording device that displays a track on a display such as a cathode ray tube.

(b) Prior Art and its Disadvantages A conventional track recording device that can display a track on a display such as a CRT display is disclosed in, for example, Japanese Patent Application No. 52716/1985, which was previously proposed by the present applicant. As shown in the figure, the position data sent from the navigation device is stored in the memory, and the stored data is read out from the memory and displayed on the display. However, although such devices have the basic function of displaying stored data on a display, they are not sufficiently easy to handle. For example, the operation to display the current position in the display range always needs to be performed using the screen/cursor movement keys, and when the display area is switched from sea area A to sea area B, which is quite a part of sea area A, the own ship's To easily and quickly determine the relative positional relationship between sea area B and the own ship's current position, the operator must judge in which direction the current position of the ship is based on @area B. There was an inconvenience that made it difficult.

(C1 Purpose of the Invention The purpose of this invention is to: When the current position is not within the display range,
A track that displays the direction of the current position based on the display range on the display screen, allowing the operator to immediately determine the relative positional relationship between the own ship's current position and the currently displayed display range. The purpose is to provide a recording device.

(d1 Structure and Effect of the Invention In summary, the present invention calculates the display range based on the latitude and longitude of the center position of the screen and the scale factor of the screen, and determines the relative positional relationship between the current position and the display range. If the current position is not within the display range, the direction of the current position is determined with respect to the display range, and the direction is displayed as a mark or character on the display screen so that the operator can This allows you to directly determine the direction of your current location by looking at the characters.

According to this invention, even when the screen is switched, the direction of the current position relative to the switched display range can be immediately determined, so that the current position cannot be displayed again from that state. In this case, the cursor keys can be operated very easily, which has the advantage of greatly improving operability. For example, if the direction of the current position is displayed as an arrow mark, if the arrow points to the left, you only need to operate the cursor key to move the screen to the right, and if the arrow points to the left, If you are facing the
It is sufficient to operate the cursor key for moving the screen rightward and the cursor key for moving the screen downward, either separately or at the same time. In addition, each time you know the direction of your current position relative to the display range, you can also grasp the direction of the currently displayed position based on the current position, so you can see the situation in the ocean area relative to your current position over a wide range beyond the display range. There is an advantage that can be grasped visually.

TELE EMBODIMENT FIG. 1 is a front view of a track recorder which is an embodiment of the present invention. In the figure, 1 is a keyboard, 2 is a CRT, 3
4 is a brightness adjustment volume, and 4 is a keyboard illumination volume.

Keyboard 1 consists of a total of 33 touch key switches, and can be used to operate the screen, set destinations, event marks, etc.
Performs data transfer between memories, initial settings, etc.

For screen operations, use the screen/cursor movement keys 101. Scale change key 102. Cursor on/off key 103. own ship center key 10
Do it in 4. The cursor on/off key 103 displays or erases a cursor on the display screen each time it is operated. The screen/cursor movement key 101 moves the cursor when the cursor is displayed on the display screen, and moves the screen when the cursor is not displayed. A scale change key 102 enlarges and reduces the screen. The own ship center key 104 sets the own ship mark at the center of the display screen when the cursor is not displayed, and sets the cursor intersection at the center of the display screen when the cursor is displayed.

Use numeric key 1 to set destination marks, event marks, etc.
This is done using 06. For example, when displaying the number 1 destination mark at a predetermined position on the display screen, first specify the display color of the destination, then operate the destination key 106a, and then operate the 1 key. . The color is specified by specifying a code from 1 to 7. For example, when the 3rd key is pressed for one month, green is designated, and when the 5th key is operated, purple is designated.

Memory operations such as data transfer between memories are performed by operating a memory operation function key 109. For example, if you want to transfer the data in the memory where the track is stored (memory number 0) to another additional memory, operate the memory transfer key. Also, to erase all destination marks, event marks, tracks, etc., operate the memory erase key. Furthermore, when transferring the current track storage data to the additional memory, the user operates the erasable key to erase the additional memory prior to operating the storage transfer key.

Initial settings are performed using the numerical keys 106 and screen switching keys 110. The screen switching key 110 is a key for selecting whether the display screen is a track display screen or an initial setting screen, and the display screen is switched each time it is operated. On the initial setting screen, you can select the type of navigation device, set the interval for capturing position data sent from the navigation device, that is, the interval for storing position data in the track memory memory (memory 0), You can select a smoothing coefficient to reduce wandering, select whether or not to issue a buzzer warning when approaching the currently selected destination, and set the approach distance at which you want the warning to be issued. In this case, the setting of the storage interval time and the warning approach distance are performed using the numerical keys 106.

Note that the track interrupt key 111 is used to interrupt display of the track,
It is used when restarting, and when the track is interrupted, only the own ship's mark is displayed, and when you operate it again in that state to resume displaying the track, the track starts to be drawn from the position of the own ship's mark at that time. The wake color designation and color deletion key 105 specifies the color of the wake, or designates one color among the wakes designated in several colors to temporarily or permanently delete the wake. The track redisplay key 112 is used to display the track temporarily erased by the track color erase key to its original state. Furthermore, function keys 107 such as a mark erase key, a destination number key, and a release key are used for event marks,
You can erase everything including the destination mark, or use the numeric key 106 above.
Select one of the destinations set by , delete destination data on the initial setting screen, stop the alarm buzzer, etc. Furthermore, the display 1 number key 108 on the expansion screen is the track memory memory (number 0 memo 1).
Select whether to display data from the additional memory (additional screen) overlapping the data for the month (current track screen), or to display only one side. The extension screen number key specifies the extension memory, that is, the extension screen at that time.

FIG. 2 is a diagram showing an example of the display on the display screen.

In the figure, cx and cy represent cursors, and CP represents the cursor intersection. LAT represents a latitude line, LON represents a longitude line, and S represents a coastline set using nine of the numerical keys 106. Furthermore, WPl and WF2 are numerical keys 106
represents a destination mark set by , and E1 to E3 represent event marks similarly set by numeric keys 106 .

Also, the marks and character data displayed at the top and bottom of the display screen represent the following contents.

■ When the cursors CX and CY are displayed, a ten mark as shown appears. Also, when the cursor is not displayed, if the own ship mark is within the screen, the own ship mark is displayed, and if the own ship mark is outside the screen, the direction (one of eight directions) is displayed. An arrow will appear.

■ When the cursor is displayed, the position of the cursor intersection (latitude, longitude) is displayed, and when the cursor is not displayed, the position of your own ship is displayed.

■ The specified color of the current track is displayed on the first line, and the current specified color is displayed in parentheses on the second line.

■ When the cursor is displayed, the distance and direction from the own ship to the cursor intersection are displayed; when the cursor is not displayed, the ship's speed is displayed on the first line, and the course is displayed on the second line. Note that these ship speed and course are data sent from a navigation device.

■ If a water thermometer or fish finder is connected to the navigation device, the first line will display the water temperature and the second line will display the water depth.

■ The number of miles of screen width is displayed on the first line, and the screen specification status is displayed on the second line.

■ When a destination is selected, the latitude and longitude of the selected destination are displayed. In the illustrated example, the destination WP
This shows that I is selected.

■ If a destination is selected, display the distance and direction to the destination.

■ When a destination is selected, display the heading error when taking into account deviations in flow and compass errors. When the upper and lower triangular marks match, the correct course will be taken to reach the destination.

Next, the control section of the track recorder will be explained.

FIG. 3 is a block diagram of the track recording device.

Input data is input to CPtJlo from the keyboard 1, and navigation data is input from the navigation device. Loran, NN5S, compass, gyro, etc. are used as navigation devices to obtain position data and direction data. ROMII stores a program that defines the operating procedure of the track recorder,
The RAM 12 stores position data input from the navigation device or destination marks, event marks, etc. input and set using the keyboard 1, up to a maximum of 1000 points. This RAM12 is the aforementioned track storage memory (memory 0)
, and is treated as the 0 screen, which is the reference screen.

CPU10 can further optionally be connected to a plurality of RAMs and a plurality of ROMs, and can transfer data in memory No. 0 to each RAM. R for this expansion
The AM and ROM have screen numbers 1 to n, and each has a storage capacity of 1000 points, similar to the RAM 12. In the illustrated example, there are three RAs with screen numbers 1 to 3.
M has been added, and two ROMs with screen numbers 4 and 5 have been added. Note that the RAM 12.1 for the 0th screen to R and AM for the 3rd screen are each backed up by a battery so that the stored data can be retained even when the power is turned off.

The data in memory No. 0 constituting the track storage means is written into the refresh memory 13 in response to the operation of the keyboard 1. In this case, by operating the additional screen display 1 number key 108 as described above, only the data of the 0 screen, only the data of the specified screen, or the data in which the data of the 0 screen and the data of the specified screen are superimposed are displayed. Written, C
It will be displayed on RT2. The refresh memory 13 includes three graph ink memories for displaying tracks, event marks, maps, etc. in up to seven colors;
and a character generator for displaying latitude, longitude data and other characters. The color conversion circuit 14 converts the data stored in the graph ink memory into a predetermined color signal based on the color data of the wake specified by the wake color designation key or the numeric key 106, or the color data of other event marks, etc., and converts it into a predetermined color signal. Output to.

Figure 4 is a configuration diagram of the main parts of RAMI2, which stores 0 screen data, and Figure 5 is an expansion memory (RAM or R
OM) is a main part configuration diagram.

In FIG. 4, the location of the destination WPT set using the numerical keys 106 is stored in area M1.

The destination is set by moving the cursor to the destination, setting the destination number, and then operating the destination setting key 106a, as described above. In this case, if a color is specified using keys 1 to 7 before setting the destination number, the newly specified color data is added to the destination data and stored. If no color is specified, the color data already specified at that time is added.

Area M2 includes the navigation device NAV selected on the initial setting screen.
The type of is memorized.

The area M3 stores the interval at which the CPU 10 takes in the position data sent from the navigation device, that is, the storage interval t of the position data in the RAM 12.

The scale ratio S of the display screen is written in area M4. α is done.

This scale ratio S is changed when the scale change key 102 is operated.

Area M5 stores the center position C of the display screen. C
PU10 actively monitors the center position C of the display screen, determines the coordinates of the display screen from this center position C and the scale ratio S, and calculates the display position of the current position, track, etc.

The number of points currently stored in the RAM 12 is stored in area M6. As mentioned above, the maximum number of storage points in the RAM 12 is 1000, and when 1000 points are exceeded, old data is automatically discarded and new data is newly stored. CPUl0 is in this area M6
By monitoring the number of memory points t stored in R
Controls data update for AMI2. Also RAM
12 (screen 0) is sent to the refresh memory 13 while monitoring the number of storage points t.

The designated color of the current track is stored in area M7. Second
If the designated color of the current track is displayed on the first line at the position marked with ■ in the figure, this designated color will be stored in area M7. As will be described later, each time the CPU 10 takes in position data from the navigation device, it adds the color data stored in the area M7 to the position data and stores it in the RAM 12 (memory No. 0). In addition, the color specification is 1 as mentioned above.
This is done using the numerical keys from ~7. Graph ink memory is 3
Since it is composed of two sheets of memory, it is possible to display up to seven colors, and the CPU 10 controls writing to the graph ink memory based on the color data set with numerical keys 1 to 7. .

Area M8 stores the course from the current position to the selected destination.

In area M9, the course error dD, which is the amount of deviation of the triangular mark displayed at the position of This is the difference between the above-mentioned course and the course that should actually be set, which is caused by the difference between the previously set course and the direction in which the course was actually moved on that course (this direction is determined from at least two position data. ).

Area MIO contains the difference between the previously set course and the actual direction of movement based on that course. Orientation correction data eH, which is the amount of orientation to be corrected, is stored.

This azimuth correction data eH is equal to other azimuth errors excluding the error of the compass itself. For example, errors based on drifting correspond to this azimuth correction data eH. In addition, area M
The data stored in 8 to MIO is used to display the marks shown in Figure 2, and the display positions of the upper and lower triangular marks are controlled according to the size of the heading error dD, and when the heading error dD becomes 0, both Display control is performed so that the positions of the triangle marks match.

Area Mll stores azimuth data) I input from the compass of the navigation device. Since this direction data H includes errors of the compass itself, the area M8. In area M12, which is used to calculate the course error dD of area M9 along with the data stored in MIO, position data input from the navigation device or event marks and destination marks set using the numerical keys 106 are stored as 1ooo The points are stored in the order in which they are entered, with the maximum number of points. Data corresponding to one point is composed of latitude and longitude data, color data added thereto, and ID data for identifying the type of data. The ID data identifies the position data input from the navigation device and the event mark and destination mark set by the numerical keys 106. When the data constituting one point is position data input from a navigation device, the color data becomes the color data set in area M7 as described above. Further, when the data constituting one point is an event mark or destination mark set by the numerical key 106, the color data becomes data of the currently specified color. The currently specified color is displayed on the second line at the position marked with ■ in FIG. 2, and is set using the numerical keys 106.

The expansion memory stores position data, event marks, destination marks, etc., with a maximum of 1000 points, in the same state as that stored in area M12 of the RAM 12. Note that the ROM in the additional memory stores map data that does not need to be changed, and the RAM in the additional memory stores the tracks that you want to keep, event marks 1 destination marks, etc. by transfer from the RAM 12. Ru.

6 and 7 show the basic operating procedure of the track recorder.

Figure 6 shows the position data sent from the navigation device in RAM.
12 is a flowchart of a data recording operation procedure to be stored in No. 12 (memory No. 0). First, step nl (hereinafter, step ni is simply referred to as ni).

) receives position data from the navigation device. Next, it is determined whether the received data is received data from the navigation device set in area M2 (n2), and if so, the storage interval t set in area M3 is the same as the previous data reception. It is determined whether or not time has passed (n3). If t has elapsed, the received data is used as current position data, color data set in area M7 and ID data for identifying that it is position data from a navigation device are added, and memory number 70 ( R
Write to area M12 of AM1'2).

This data recording operation procedure is executed every time data is sent from the navigation device and an interrupt is made to the CPU10. As a result, based on the determination of n2 and 03, the received data from the selected navigation device will be taken in every time the event progresses and will be written into memory No. 0.

FIG. 7 is a flowchart showing a display operation procedure for displaying data stored in memory No. 0.

First, in nlO, scale ratio S and center position C are set in area M4. The current display range is calculated by reading from M5. Since the display area of CRT2 is fixed, the scale ratio S
By knowing the center position C, the display range can be easily determined.

Once the display range is set, the pointer POINT allocated in CPtJ10 is then set to 1. Next, data Pn of memory number 0 set by pointer POINT
is read out (n12). Then, based on the scale ratio S and center position C, the coordinates of the latitude and longitude data read out at n12 are converted to specify the writing position to the refresh memo January 3 (n13), and the writing is executed at n14.

This procedure from n12 to n14 is completed by incrementing the pointer at n16 and comparing the number of recording points p set in area M6 with the pointer POINTO value (n
15) The above display operation procedure is performed for all points stored in memory No. 0) and completed every time new data is stored in memory No. 0, that is, n4 in FIG. This is executed each time position data is written in , or a destination mark or event mark is stored by the number 10-106.

As described above, the position data sent from the navigation device can be selectively stored in memory No. 0, and the stored data can be displayed on the CRT 2.

Next, the display operation when the display range is changed by operating the screen/cursor movement key 101 or the scale change key 102 will be described.

Assuming that the current position is P, for example, if the display range is in the sea area A as shown in FIG. Although it is possible to move, in this case, the current position P will be in the upper left direction when the display range of ocean area B is used as a reference. Therefore, as described above, in such a case, an arrow mark MK pointing toward the upper left as shown in FIG. 8(B) is displayed at the position marked ■ in FIG. 2. Note that the latitude and longitude of the current position P are displayed at the position marked ■.

FIG. 9 is a flowchart showing a mark display operation procedure executed in the display mode together with the display operation procedure shown in FIG.

First, at n20, the display range R is calculated based on the scale ratio S and the center position C, similar to nlo in FIG. 7 above. Next, it is determined whether the current position is within the display range R (n21), and if so, the process ends there.

If the current position is not within the display range R, the direction of the current position with respect to the display range R is determined in n22. This determination is made by converting the coordinates of the current position expressed in latitude and longitude using the same operation as n13 in FIG.
This is done based on the relative positional relationship between the position at that time and the display range R. Then, steps n23 to n26 are executed according to the direction of the current position with respect to the display range, and the mark MK is displayed at the position of ■ without displaying the direction of the current position. Note that in this example, the direction is divided into eight parts and displayed.

As described above, when the current position is out of the display range due to screen movement, the direction of the current position is displayed with an arrow based on the display screen, so the operator can look in the direction of the arrow. This allows you to immediately know your current location on the map. In this embodiment, the direction of the current position is displayed using an arrow, but instead of this arrow, characters representing directions such as southeast or northwest may be used to display the direction.

[Brief explanation of drawings]

FIG. 1 is a front view of a track recording device that is an embodiment of the present invention, FIG. 2 is a diagram showing an example of display on a display screen, FIG. 3 is a block diagram of the track recording device, and FIG. FIG. 5 is a configuration diagram of an additional memory, FIG. 6 is a flowchart showing a data recording operation procedure, and FIG. 7 is a flowchart showing a display operation procedure. Also, Fig. 8 (A), (B
) is a diagram explaining the display state of the direction mark when moving on the display screen, and FIG. 9 is a flowchart showing the mark display operation procedure. Applicant Furuno Electric Co., Ltd. Agent Patent Attorney Hisao Komori Figure 2 L-Yo 6N Figure 7 Figure 8 (A) (B)

Claims (1)

[Claims] (1) A track recording device comprising a track storage means for accumulating position data sent from a navigation device and storing it as a track, and a display device for reading out and displaying the data stored in the track storage means, display range calculating means for calculating the current display range displayed on the display device based on the size of the display screen of the display device and a scale ratio to be displayed on the display screen; means for determining whether or not there is a current position; current position direction determining means for determining the direction of the current position based on the display range if the current position is not within the display range; A track recording device comprising: current position/direction display means for displaying a mark or character on the display.