JPH06100472B2 - Wake display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an improvement of a track recording device that sequentially stores position data obtained by a navigation device and displays a track on a display such as a CRT. .

(B) Conventional technology A conventional general track recording device that displays a track on a display such as a CRT stores the current position data sent from a navigation device such as Loran C, Omega, or GPS in a sequential memory. At the same time, the stored data is read from the memory and the track is displayed on the display. In addition, the data stored in the memory is saved on a floppy disk, etc., as needed, and is used again at a later time when necessary.

By the way, when traveling in a certain sea area for a long time or when traveling in the same route back and forth, the track displayed on the display screen may be complicated and difficult to see. In order to solve such a problem, there is provided a function (track selection display function) of displaying only the data within the specified range of the contents of the track memory.

In addition, the data of each point is sequentially stored in the track memory at preset fixed time intervals or fixed distance intervals, but the number of points that can be stored is determined by the track memory storage capacity and the amount of data stored per point. . Therefore, when data exceeding this number of points is stored, the oldest data is erased sequentially. Therefore, in order to efficiently use the capacity of the track memory, a function of deleting an unnecessary track range (track deleting function) is also provided.

(C) Problems to be Solved by the Invention By the way, in both the track selection display function and the track deletion function, the method of specifying the range of the track to be displayed or to be deleted is specified by time or is displayed. It depends on the color of the wake. However, the track displayed on the screen is not limited to the track currently being traveled, and the track reproduced from the floppy disk may be displayed. Furthermore, not only the track of the day but the track of yesterday may be displayed. In this manner, when a plurality of tracks with different dates and times are displayed, the desired track cannot be displayed accurately only by specifying the time. In addition, when the unnecessary track is deleted by using the track deletion function, there is a possibility that an erroneous operation may be caused by mistakenly deleting the track of yesterday.

An object of the present invention is to enable a track to be selected by date and time data including a date when selecting and displaying a track from data stored in the track memory or deleting an unnecessary track from the track memory. An object is to provide a track recording device that solves the problem.

(D) Means for Solving the Problem The track recording device according to claim (1) of the present invention includes a positioning means for measuring the current position of the own ship, and a date and time including the date and time when the current position is measured. A track memory that stores the position of the ship, track display control means that creates track display data from the contents of the track memory and writes it in the display memory, and displays the contents of this display memory on the display, and should be deleted. It is equipped with a date and time data reading unit that reads the date and time data that includes the date and time that represents the range of the track, and a track erasing unit that erases the position data stored in the track memory together with the read date and time data within the deletion range. Become.

Further, the track recording device according to claim (2) of the present invention,
Positioning means for measuring the current position of the ship, a track memory that stores the position of the ship together with the date and time including the date and time when the current position was measured, and date and time data including the date and time indicating the range of the track to be displayed The date and time data reading means for reading the position data and the position data searching means for searching the position data stored together with the date and time data within the read display range from the track memory, and the track display data are created from the searched position data. It is provided with a track display control means for writing the contents in the display memory and displaying the contents of the display memory on the display.

(E) Action FIG. 1 is a block diagram of the invention described in claim (1).
According to the invention described in claim (1), first, the positioning means 1
Measures the current position of the ship and stores the position of the ship in the track memory 2 together with the date and time including the date when the current position was measured, and the track display control means 5 uses the contents of the track memory 2 to display the track display data. Is created and written in the display memory 3, and the contents of this display memory are displayed on the display unit 4. Then, the date / time data reading means 7 reads the date / time data including the year / month / day representing the range of the track to be erased, which is designated by the operator, and the track erasing means 8 is stored in the track memory 2 together with the date / time data within the erasing range. Search for the position data that is present and delete the corresponding position data.

In this way, the range of the track to be deleted can be specified by the date and time data including the date, and there is no problem that other tracks having the same time but different dates are deleted by mistake.

Further, FIG. 2 is a block diagram of the invention described in claim (2). According to the invention described in claim (2), first, the positioning means 1 measures the current position of the own ship and stores the track memory. 2 stores the position of the own ship together with the date and time including the date when the current position is measured. Then, the date / time data reading means 7 reads the date / time data including the year / month / day representing the range of the track to be displayed designated by the operator, and the position data searching means 9 is stored together with the date / time data read by the date / time data reading means 7. The track data is searched for the current position data. Further, the track display control means 5 creates track display data from the retrieved position data, writes it in the display memory 3, and causes the display 4 to display the contents of the display memory.

Therefore, by designating the range of the track to be displayed by the date and time data including the date, only the corresponding track can be displayed, and there is no problem that tracks with different dates are displayed at the same time.

(F) Embodiments A display example of the track recording device according to an embodiment of the present invention is shown in FIGS. 3 (A) and 3 (B). A block diagram of the control unit of the device is shown in FIG.

In FIG. 4, the CPU 10 executes a program written in the ROM 11 to control the entire control unit. RAM 12 is used as a track memory and other working areas. The VRAM 13 is a display memory, and the CPU 10 writes the track display data in this VRAM 13. Display control circuit 16 is VRAM 13
Video output circuit that sequentially reads the contents of
Output to 14. The video output circuit 14 creates a video signal from the data and outputs it to the CRT 15. The CRT15 displays the track and various numerical values as shown in Fig. 3 (A) and (B). The floppy disk device 18 is an external memory for recording and reading track data and the like, and the interface circuit 17 performs a data writing and reading interface. The navigation device 20 is a navigation device such as Loran C, Omega or GPS, and measures the current position of the ship. The water temperature measuring device 21 measures the water temperature at the sea level or a predetermined depth in the sea area where the ship is currently sailing. The water depth measuring device 22 is a device for measuring the water depth of the sea area currently under navigation by transmitting and receiving ultrasonic pulses. These various devices are connected to the bus line via the interface circuit 19.
The key input device 23 is used for setting various conditions when selectively displaying or erasing a track, and the interface circuit 24 performs a key input interface.

The structure of the track memory provided in the RAM 12 is shown in FIGS.

In FIG. 5, the position data is data representing the latitude and longitude of each point, and date and time data, display color data, and link address are stored in association with these position data. Here, the date / time data is the date (year / month / day) and time (hour / minute) at which the position data of each point was measured. The display color data is the display color data of the track which is selected in advance or determined in relation to other data such as water temperature and water depth. The link address is a storage address of the position data that has a second-order relationship with this position data in time series.

The relationship between the link address and the data at each point is shown in FIG. In the same figure, when the contents shown in the figure are stored in addresses A3 to A6 and A71 to A75, the link address associated with the data at the point P1 is A4, so the data following the point P1 is stored at address A4. This is data P2. The link address associated with this P2 point data is A5, so P2
Data following point is data P3 stored at address A5
Is. Similarly, data P9 stored at address A75 is linked. In this way, addresses A3 ~
The track data of P1 to P9 is stored in A6 and A71 to A75. The link address at the final point stores a code E indicating that it is the final point.

Next, the processing procedure of the control unit shown in FIG. 4 will be described with reference to FIGS.
This will be described with reference to the flowchart in the figure.

FIG. 11 is a flowchart of a part of interrupt processing when a key operation is performed. If any key operation is performed, the CPU is interrupted and this processing is performed. First, the operated key is discriminated, and if the key for operating the track selection display mode is operated, the date of navigation along with the track is displayed near the track (n80 → n81 → n8
2). FIG. 3 (A) is a display example at that time. This date is displayed by referring to the date data stored in association with each point of the track shown in FIG. 5 and displaying the display data for the date at every predetermined interval (predetermined time interval or predetermined distance interval). This is done by writing near the track on memory. Then, the process shown in FIG. 7 is performed. If the key for setting the track deletion mode is operated, the track and the date of navigation are displayed near the track in the same manner (n83 → n84). Then, the process shown in FIG. 9 is performed.

In this way, the date displayed together with the track allows the operator to confirm the date of the track and delete or confirm the range of the track to be displayed.

FIG. 7 is a flow chart for realizing the track selection display function, and FIG. 8 is a flow chart showing a more detailed procedure of a part thereof. As shown in FIG. 7, first, a guidance display is displayed to select whether the track to be displayed is to be designated by color or by time. Wait for the selection input (n1 → n2). When the key operation for selecting the above is performed, the processing according to the content of the key operation is performed. If the time is specified, first display the guidance to enter the display start time and wait for the entry (n3
→ n4 → n5). At this time, the display start time reads the date and the hour and minute data. Subsequently, a guidance display is displayed to the effect that the display end time should be entered and the input is awaited (n6 → n7). In this case as well, the date and time data is read. Then, the conditions of the track to be displayed are set and display data creation / writing processing is performed (n8 → n9).

If the display track is selected by specifying the color, a guidance display for selecting the color of the track to be displayed is displayed and the selection is waited (n10 → n11 → n12). If a color is selected, display conditions are set and display data creation / writing processing is performed (n13
→ n9).

In this way, the track to be displayed is selected and displayed according to the specified time or color, but if the key operation to cancel the already specified condition is performed, the item to be canceled first, that is, the color specification is canceled Wait for the selection input (n14 → n15 →
n16). If the color specification release is selected, the display condition without color specification is reset (n17 → n18). If time release is selected, reset the display condition to not specify time (n19 → n20). If the all specification release is selected, the display condition without specifying the color and the time, that is, the state of displaying all the track data is reset (n21 → n22).

FIG. 8 shows the processing procedure of step n9 in FIG. 7. First, the previous track on the display memory (VRAM13) is once erased (n3
0). After that, the storage address (start address) of the position data at the beginning of the track memory is set to P, and the data (fifth position data) associated with the position data at the point indicated by this address P is set.
It is determined whether the date and time data and display color data shown in the figure) satisfy the set display conditions (n31 → n33). If the display condition is satisfied, the dot address on the display memory is calculated from the position data, and the display data is written to the display memory according to the display color data (n33). If the display conditions are not satisfied, writing to the display memory is not performed. This processing is performed for all the points indicated by the address P (n34 → n35 → n32 ...).

FIG. 9 is a flowchart for realizing the track erasing function, and FIG. 10 is a flowchart showing a part of more detailed processing procedure. As shown in FIG. 9, first, a guide display is displayed to select whether to delete the recorded track when selecting and deleting the track, that is, the currently recorded track or the reproduced track read from the floppy disk. , Wait for that selection (n40 → n41). Then, the selected state is stored (n42, n43, n44). Next, a guide is displayed to the effect that the user should select whether the track to be erased should be specified by color or by time, and wait for the selection (n45 → n46). If the color designation is selected, the process of setting the color of the track to be deleted is performed (n47 → n48). If time designation is selected, set the start time and end time of the track to be deleted (n49 → n
50). The color setting process and the time setting process are similar to the processes in the track selection display function shown in FIG.

If deletion execution is selected in the selection guidance display of the specified items, then a guidance display is displayed to the effect that either the inner side or the outer side of the display screen should be selected, and the selection waits (n51 → n52 → n53). Then, the selected state is stored (n54, n55, n56). After that, for the sake of caution, the final erasure confirmation is displayed and the selection is awaited (n57 → n5
8). If delete is selected here, the track that matches the selected condition is deleted from the track memory (n59 → n60).

FIG. 10 shows the processing procedure of step n60 shown in FIG. 9. First, the address (start address) of the first position data stored in the track memory is set to P, and this P
It is determined whether or not the date and time data and display color data associated with the position data indicated by satisfy the erasing condition (n70 → n
71). If the deletion condition is satisfied, the link address is corrected (n72). That is, the link address of the position data immediately before the position data determined to be erased is replaced with the content of the link address associated with the position data to be erased. For example, in the example shown in FIG. 6, if the data of P2 should be erased, the content of the link address A4 attached to P1 is corrected to A5. If the position data indicated by P does not satisfy the erasing condition, the above process is not performed.
Then, the above processing is repeatedly executed for each position data while sequentially linking the link addresses (n73 → n74 →
n71 ...). If the top position data in the track memory should be erased in the process of n72, the start address becomes the correction target.

If the track is displayed as shown in Fig. 3 (A),
For example, in the track deletion mode, if you set and delete the time from 6:59 on September 18, 1989 to 7:59 on September 18, 1989, the track within that time was deleted. The display as shown in FIG.

(G) Effect of the Invention According to the present invention, the conventional color designation method can only erase the area for which color designation has been performed, and the time designation method cannot distinguish the current track and the past track. .
Such inconvenience can be eliminated. In other words, when displaying the contents accumulated in the track memory, the display range can be set by date and time data including the date, so that other tracks with the same time but different dates will be displayed by mistake. Therefore, only the desired track can be displayed without fail. In addition, the specified range can be deleted from the data once stored in the track memory by specifying the date and time data including the date, so it is mistakenly deleted by mistakenly deleting other tracks with the same time but different dates. It is possible to surely delete only unnecessary tracks without causing any trouble. In addition, since the date data is included as the data of the track, the date can be displayed together with the track, so that the area to be displayed or erased can be easily identified.

[Brief description of drawings]

FIG. 1 is a block diagram of claim (1) of the present invention, and FIG. 2 is a block diagram of claim (2) of the present invention. Fig. 3 (A),
FIG. 6B is a diagram showing a display example of the track recording device according to the embodiment of the present invention. FIG. 4 is a block diagram of a control unit of the device. FIGS. 5 and 6 are configuration diagrams of the track memory provided in the RAM of the device. 7 to 11 are flowcharts showing the processing procedure of the apparatus.

Claims (2)

[Claims] 1. A track memory for storing position data of a ship's position supplied from a positioning means together with a date and time including a date when the current position is measured, and track display data is created from the contents of the track memory. A track display control means for writing to the display memory and displaying the contents of this display memory on the display unit, a date and time data reading means for reading the date and time data including the date, which indicates the range of the track to be deleted, and the read and erased data. A track recording device comprising track deletion means for deleting, from the track memory, position data stored together with date and time data within the range. 2. A track memory that stores the position data of the own ship position supplied from the positioning means together with the date and time including the date and time when the current position is measured, and the date and time including the date and time indicating the range of the track to be displayed. Date and time data reading means for reading data, position data searching means for searching the position data stored together with the date and time data within the read display range from the track memory, and track display data are created from the searched position data. And a track recording control means for displaying the contents of the display memory on a display.