JPH03125916A - Displaying device of wake - Google Patents

Abstract

PURPOSE:To prevent false display of a wake being identical in the time and different in a date and to display only a desired wake without fail by setting a range of display on the basis of data on the date and time on the occasion when the content stored in a wake memory is displayed. CONSTITUTION:A position measuring means 1 measures the present position of its own ship and makes a wake memory 2 store it together with the date and time of the measurement, while a wake display control means 5 prepares data for wake display on the basis of the content of the memory 2, writing them in a display memory 3 and also making a display unit 4 display them. A reading means 7 of the data on the date and time reads the data on the date and time in a range to be erased according to specification of an operator, and a wake erasing means 8 retrieves position data stored in the memory 2 together with the data on the date and time in the range to be erased and erases the corresponding position data. According to this constitution, it is prevented that another wake being identical in the time and different in the date is erased falsely, and only an unnecessary wake can be erased without fail.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field This invention relates to an improvement in a track recording device that sequentially accumulates position data obtained by a navigation device and displays the 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 sequentially stores current position data sent from a navigation device such as Loran C, Omega or GPS into memory. At the same time, the stored data is read out from the memory and the track is displayed on the display. In addition, the data accumulated in memory can be saved to a floppy disk, etc. as needed, and replayed and used at a later time. The track displayed on the display screen may become complicated and difficult to see. In order to solve this problem, a function (track selection display function) is provided to display only data within a specified range of the contents of the track memory.

In addition, the data of each point is stored sequentially 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 storage capacity of the track memory and the amount of data stored per point. . Therefore, when data exceeding this number of points is stored, the oldest data is sequentially erased. Therefore, in order to use the space of the track memory more efficiently, the camera is equipped with a function to erase unnecessary track ranges (track erase function).

(C) Problem 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 deleted is by specifying the range of the track by time or by specifying the range of the track to be displayed. It was determined by the color of the wake. However, the track displayed on the screen is not limited to the track currently being navigated, but may also be a track reproduced from a floppy disk. Furthermore, not only the current day's track but also yesterday's track may be displayed. In such a state where a plurality of tracks with different dates and times are displayed, it is not possible to accurately display a desired track only by specifying the time. Furthermore, when erasing unnecessary tracks using the track erasing function, there is a risk of erroneous operation due to misunderstanding such as accidentally erasing yesterday's track.

An object of the present invention is to enable a track to be selected based on date and time data including year, month, and day when selectively displaying a track from data stored in a track memory, or when erasing unnecessary tracks from a track memory. An object of the present invention is to provide a track recording device that solves problems.

(Means for Solving Problem d1) A track recording device according to claim 11 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 was measured. a track memory for storing positions; a track display control means for creating track display data from the contents of the track memory and writing it into the display memory; and displaying the contents of the display memory on a display; The device is equipped with a date and time data reading means for reading date and time data including the year, month, and day representing the range, and a track erasing means for erasing the position data stored in the track memory together with the read date and time data within the erasure range.

Furthermore, the track recording device according to claim (2) of the present invention includes:
A positioning means for measuring the current position of the own ship, a track memory that stores the position of the own ship along 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. a date and time data reading means for reading the date and time data; a position data search means for searching the track memory for position data stored together with the read date and time data within the display range; and a position data search means for creating track display data from the searched position data. It is equipped with a track display control means for writing in the display memory and displaying the contents of the display memory on the display.

(e) Effect FIG. 1 is a configuration 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 its own ship, stores the position of its own ship in the track memory 2 along with the date and time including the date and time when the current position was measured, and the track display control means 5 extracts data for track display from the contents of the track memory 2. is created and written into the display memory 3, and the contents of this display memory are displayed on the display 4. Then, the date and time data reading means 7 reads the date and time data including the year, month, and day indicating the range of the track to be erased specified by the operator, etc., and the track erasing means 8 stores the date and time data in the track memory 2 together with the date and time data within the erasure range. search for location data,
Deleting the relevant location data In this way, it is possible to specify the range of tracks to be deleted using date and time data including the year, month, and day, which may cause problems such as other tracks with different dates at the same time being mistakenly deleted. do not have.

FIG. 2 is a block diagram of the invention set forth in claim (2). According to the invention set forth in claim (2), the positioning means l first measures the current position of the own ship and stores it in the track memory. 2 stores the position of the ship along with the date and time including the date and time when the current position was measured. Then, the date and time data reading means 7 reads the date and time data including the date and time representing the range of the track to be displayed specified by the operator, and the position data search means 9 stores the date and time data together with the date and time data read by the date and time data reading means 7. Search the track memory 2 for position data. Further, the track display control means 5 creates track display data from the searched position data and writes it into the display memory 3, and causes the display 4 to display the contents of the display memory.

Therefore, by specifying the range of tracks to be displayed using date and time data including the year, month, and day, only the corresponding tracks can be displayed, and the problem of tracks with different dates being displayed at the same time does not occur.

(f) Embodiment A display example of a track recorder according to an embodiment of the present invention is shown in FIGS. 3A and 3B, and a block diagram of the control section of the same device is shown in FIG. 4.

In FIG. 4, the i'cPU 10 executes the program written in the ROMII and supervises the entire control section.

RAM 12 is used as track memory and other working areas. The VRAM 13 is a display memory, and the CPU 10 writes track display data into this VRAM 13. The display control circuit 16 sequentially reads out the contents of the VRAM 13 at predetermined timing and outputs them to the video output circuit 14. The video output circuit 14 creates a video signal from the data and outputs it to the CRT 15. The CRT15 is shown in Figure 3 (
Tracks and various numerical values are displayed as shown in A) and (B). The floppy disk device 18 is an external memory for recording and reading track data, etc.
The interface circuit 17 performs a data writing and reading interface, and the navigation device 20 is a Loran C1.
This is a navigation device such as Omega or GPS, which measures the current position of the ship. The water temperature measuring device 21 measures the water temperature at the sea surface or at a predetermined depth in the ocean area where the ship is currently sailing. The water depth measuring device 22 is a device that measures the water depth of the ocean area in which the ship is currently navigating by transmitting and receiving ultrasonic pulses. These various devices are connected to the path line via an interface circuit 19. The key manual device 23 is used to set various conditions when selectively displaying or deleting tracks, and the interface circuit 24 performs the key manual interface.

The configuration of the track memory provided in the RAM 12 is as follows.
As shown in FIG.

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 along with each position data. Here, the date and time data is the date when the position data of each point was measured (
The 0 display color data representing the year, month, day) and time (hour and minute) 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 position data that is chronologically runner-up to this position data.

FIG. 6 shows the relationship between the link address and the data at each point. In the figure, addresses A3 to A6 and A71 to
If the content shown in the figure is stored in A75, the link address associated with 21 points of data is A4, so 21
The data following the point is data P2 stored at address A4.

Since the link address associated with these 22 points of data is A5, the data following the 22 points is data P3 stored at address A5. Similarly, address A75
It is linked to data P9 stored in . In this way addresses A3-A6 and A? Track data of P1 to P9 is stored in 1 to A75. In addition, the link address of the final point is the code E indicating that it is the final point.
is memorized.

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

FIG. 11 is a flowchart of a portion of interrupt processing when a key operation is performed. If any key operation is performed, an interrupt is generated to the CPU, and this processing is performed. First, the operated key is determined, and if the key to set the mode for displaying the track selection is operated, the date of navigation along with the track is displayed near the track (n 80-
"n81-"n82). FIG. 3(A) is an example of the display at that time. This date display refers to the date data stored along with each point on the track shown in Figure 5, and displays the display data for the date at each predetermined interval (predetermined time interval or predetermined distance interval). This is done by writing near the wake in memory. Thereafter, the process shown in FIG. 7 is performed. If the key for setting the track erasure mode is operated, the track and the date of navigation are similarly displayed near the track (n83→n84). Thereafter, the process shown in FIG. 9 is performed.

The date displayed together with the track allows the operator to confirm and erase the date of the track or confirm the range of the track to be displayed.

FIG. 7 is a flowchart for realizing the track selection display function, and FIG. 8 is a flowchart showing a part of the procedure in more detail. As shown in FIG. 7, a guidance display is first displayed that allows the user to select whether the track to be displayed is to be displayed by specifying a color or by specifying a time.

Wait for the selection input (nl-=n2). When a key operation for making the above selection is performed, processing is performed according to the content of the key operation. If you specify a time, first display a guide to input the display start time and wait for that input (ri 3-'
n4→n5). At this time, the display start time reads the year, month, day, and hour data. Next, a guide is displayed to the effect that the display end time should be input, and the input is waited for (n 6-'n
7). In this case, the year, month, day, and hour data are also read. Then, the conditions of the track to be displayed are set and display data creation/writing processing is performed (n8-n9).

When the display track is selected by specifying a color, a guidance display to select the color of the track to be displayed is displayed, and the selection is waited for (n10-=n11-n12), and the color selection is performed. Set the display conditions and create/write the display data (n 13-=n 9) In this way, the tracks to be displayed will be selected and displayed according to the specified time or color, but if you have already specified When a key operation to cancel a condition is performed, a guidance display is displayed to indicate that the item to be canceled should be selected, that is, whether to cancel the color specification or the time specification, and wait for the selection input (n 14-on 15). -on
16) If 0 color designation cancellation is selected, the display condition is reset to no color designation (n 1 ? - n 18). If canceling the time designation is selected, the display conditions are reset to no time designation (n19→n20). If all designation cancellation is selected, reset the display conditions to display all track data without specifying color or time (n21
-n22).

FIG. 8 shows the processing procedure of step n9 in FIG. 7. First, the previous track on the display memo IJ (VRAM 13) is once erased (n30). After that, the storage address (start address) of the first position data in the track memory is set to P, and the data accompanying the position data of the point indicated by this address P (date and time data and display color data shown in Figure 5) Determine whether or not the set display conditions are satisfied (n31
→n32). If the display conditions are 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 process is performed for all points indicated by address P (n34→n35→n32・
・・).

FIG. 9 is a flowchart for realizing the track erasure function, and FIG. 1O is a flowchart showing a part of the more detailed processing procedure. As shown in Fig. 9, first, when selecting and erasing a track, a guide is displayed to inform you that you should select whether to erase the recorded track, that is, the track currently being recorded, or the reproduced track read from the floppy disk. , waits for its selection (n40-n41). Then, the selected state is stored (n 42. n 43. n 44).

Next, a guide is displayed to the effect that the user should select whether to erase the track by specifying a color or by specifying a time, and waits for the selection (n45→n46). If the color designation is selected, the next step is to set the color of the track to be erased (n47→n4B)
), if time designation is selected, perform the process of setting the start time and end time of the track to be erased (n49-n50)
. This color setting process and time setting process are similar to those in the track selection display function shown in FIG.

If execution of deletion is selected while the selection guide for the specified item is displayed, a guide will be displayed to the effect that the user should select whether to erase the inside or outside of the display screen, and wait for the selection (n51 -=n52-n53). Then, the selected state is stored (n54.n55.n56). Thereafter, for the sake of caution, a final deletion confirmation is displayed and the selection is awaited (n57-=n5B). If deletion is selected here, the track that meets 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 the position data indicated by P is Determine whether the accompanying date and time data and display color data satisfy the erasure condition (n7
0-=n71). If the deletion conditions are satisfied, the link address is modified <n72), that is, the link address of the position data immediately before the position data determined to be completely deleted is changed to the link address associated with the position data to be deleted. Replace with content. For example, in the example shown in FIG. 6, if data in P2 is to be erased, the contents of link address A4 associated with Pl are modified to A5.

If the position data indicated by P does not satisfy the erasure condition,
The above process is not performed, and the above process is repeatedly executed for each position data while sequentially linking the link addresses (n73-n?4→n71=).

In addition, in the process of step 172, if the head position data in the track memory is to be deleted, the start address is to be corrected.

If the track is displayed as shown in Figure 3 (A),
For example, in track erasure mode, by specifying the time, 198
September 18, 1989 6:59 to September 18, 1989 7
If the time up to 1:59 is set and erased, the track within that time will be erased and a display as shown in Figure CB) will be made.

(A) Effects of the Invention According to this invention, the conventional color specification method cannot erase the area where the color specification has been made, and the time specification method cannot distinguish between the current track and the past track. ,
It is possible to eliminate such inconveniences. In other words, when displaying the contents stored in the track memory, the display range can be set using date and time data including the year, month, and day, so other tracks with the same time but different dates may be displayed incorrectly. It is possible to reliably display only the desired trajectory. In addition, since it is now possible to erase a predetermined range from the data that has been temporarily stored in the track memory by specifying date and time data including the year, month, and day, it is possible to erase a certain range by mistake, such as accidentally erasing other tracks that have the same time but a different date. This makes it possible to reliably erase only unnecessary wakes without causing problems. Furthermore, by including the year, month, and day data as the track data, the year, month, and day can be displayed together with the track, and thereby the area to be displayed or erased can be easily identified.

[Brief explanation of the drawing]

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. Figure 3 (A),
CB) is a diagram showing a display example of a track recorder according to an embodiment of the present invention. FIG. 4 is a block diagram of the control section of the device. FIGS. 5 and 6 are configuration diagrams of a 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 that stores the position data of own ship's position supplied from the positioning means along with the date and time including the date and time when the current position was measured, and a display memory that creates data for displaying the track from the contents of the track memory. a track display control means for displaying the contents of the display memory on a display; a date and time data reading means for reading date and time data including the year, month, and day representing the range of the track to be erased; A track recording device comprising track erasing means for erasing position data stored together with date and time data from the track memory. (2) A track memory that stores the position data of own ship's position supplied from the positioning means along with the date and time including the date and time when the current position was measured, and the date and time data including the date and time that represents the range of the track to be displayed. A date and time data reading means for reading, a position data search means for searching the track memory for position data stored together with the read date and time data within the display range, and creating and displaying track display data from the searched position data. A track recording device comprising a track display control means for writing in a memory and displaying the contents of the display memory on a display.