JPS6182181A - Submarine line display device for fishing boat - Google Patents

Abstract

PURPOSE:To judge the relation between the state of the sea bottom and the state of a fish school distribution easily and accurately by displaying an image of the seabottom line and a school of fish together on the same screen. CONSTITUTION:Pieces of information corresponding to respective positions on a perpendicular surface running through two specific horizontal positions are read out of a ROM14 on the basis of pieces of latitude and longitude position information on a ship from a loran position measuring device 1, etc., and onward direction information on the ship from a compass 2 to access a seabottom depth ROM15, thereby writing an image of a submarine line which is cut by the perpendicular surface as required in a depth chart memory 18. Then, the memories 18 and 105 are read out through switches 19 and 10 controlled by a counter which counts a clock, etc., and supplied to a display device 27, so that the seabottom line image and fish school image are displayed together on the same screen. Consequently, the relation between the seabottom state and fish school distribution state is judged easily and accurately.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a fishing boat submarine line display device for displaying the surrounding submarine line and schools of fish in a fishing boat.

Conventional technology> Fishing vessels are equipped with fish finders, and during bottom trawl fishing, etc., the fish finder is used to grasp the distribution of fish schools, as well as to check for shallow waters, sunken ships, etc. They check the state of the ocean floor using nautical charts and make sure that fishing is safe by ensuring that nets do not accidentally get caught, break, or become stranded.

<Problems to be solved by the invention> However, it is not only time-consuming to check the state of the seabed using a nautical chart, but it is also difficult to compare the confirmed state of the seabed with the distribution of fish as determined by a fish finder. This had the drawback of requiring a great deal of effort and effort.

Also, if you try to grasp the relative relationship between the condition of the seabed and the distribution of fish schools, you may end up sinking the net unexpectedly deep without accurately checking the condition of the seabed. The disadvantage is that the nets are placed relatively high above the seabed to ensure safety.

This had the disadvantage that fishing for types of fish distributed near the seabed was less efficient.

In view of the above points, the present invention aims to make it possible to easily and accurately judge the relative relationship between the seabed condition (6) and the distribution of fish schools, thereby allowing fishing to be carried out safely and efficiently. That is.

<Means for Solving the Problems> In order to solve the above-mentioned problems, the submarine line display device for fishing boats of the present invention has a sea bottom line display device for fishing boats, which is designed to solve the above-mentioned problems. a first fP stage for outputting an image signal of a seabed line; a second means for outputting an image signal of a fish school image from a fish finder; and display means for displaying images together on the same screen.

In other words, the screen of a display device such as a CRT display device, liquid crystal, or plasma is divided, and a submarine line based on the image signal output from the first means is displayed at a predetermined portion of the divided portion, and the above-mentioned The fish school image based on the image signal output from the second means is displayed on the remaining part of the screen, and the relative relationship between the seabed line and the fish school image is displayed at a glance.

<Example> Next, embodiments of the present invention will be described using the drawings.

In addition to showing the configuration of the CRT display device 27, FIG. 1 also shows an example in which a seafloor line cut along a vertical plane passing through three predetermined locations in the horizontal direction and an image of a school of fish F obtained by a fish finder are displayed together. The screen is divided into two horizontally, and the left half (X=N/2~N-1) displays the image of the school of fish F taken by the fish finder, and the right half (x=0~N
/2-1) The submarine line is now displayed.

Here, it is assumed that the ship is located at the center of the screen (K=N/2) and is moving to the right. The horizontal display range of the high-bottom line is L11 miles.

Therefore, the left edge of the screen (x=N-1) displays the fishfinder image based on the N/2 previous transmission, and the center of the screen (x=N/2) displays the image from the 1st previous transmission. An image of fish school F taken by the fish finder based on the image is displayed, and the bottom line directly below the hull is displayed in the center of the screen (X=N/2-1), and the right edge of the screen (x=0) Displays the seabed line l and p miles away from the ship in the direction of travel.

The screen division ratio is not limited to 1:1 as described above, but may be set to any desired ratio, such as 2:1, for example.

The number of pixels of the display device 27 is N from 0 to N-1 in the horizontal direction.
There are also N pieces from 0 to N-1 in the depth direction, for a total of N8 pieces.

FIG. 2 shows the configuration of the depth map memory 18, which has a storage capacity of NXN/2 humans as shown in FIG.
The contents stored in the depth map memory 18 are displayed as they are as a seabed line. Therefore, x=N/2-1 in the depth map memory contains the depth of point S, which is the ship's position on the map, and x=0 contains the depth T, which is the position Lp miles away from the ship's position in the bow direction. The depth of each point will be written.

FIG. 3 shows the configuration of the seabed depth ROM 15, whose storage capacity is MXMXK bits. Here, K is the number of bits required to store the seabed depth.

In the figure, the U direction indicates the west direction, and the ■ direction indicates the south direction. Note that a negative value is stored for the seabed depth at a point where the seabed depth is unknown, and when a negative value is output from the seabed depth ROM 15, the comparator 17, which will be described later, does not output a coincidence signal, and the As shown in Figure 1, the seabed line is not displayed as a solid line but as a dotted line.

FIG. 4 is a block circuit diagram showing an embodiment of the present invention.

Before explaining this block circuit diagram, explanatory terms and corresponding symbols will be explained. (
(See Figures 1, 2, and 3) (a) Location of point S t, os, La5 (unit: seconds) The ship's position on the map, where Los is the longitude and Las is the latitude. Show each. Here, LO indicates east longitude, and La indicates North Korea.

(b) Location of point 0 L oo, L ao (unit: seconds) Location of point 0 on the map. Point 0 refers to the center position of the seabed depth memory (c) Location of point T Lot, Lat (unit: seconds) Location on the map to T.

(d) Bow direction B (unit: twice) As shown in Figure 5, the heading direction is shown clockwise (clockwise) from the north.

(e) Display range of the seabed line in the navigation direction Lp (unit: miles) (r) Position of point s on the screen Position of points Us, VsS on the seabed depth ROM (g) Position of point 0 on the screen Uo, V.

The position of the 0 point on the seabed depth ROM. In this example, both UO and vO are M/2.

(h) Position of point T on the screen ut, vt Position of point T on seabed depth ROM (+) Depth direction display range R (unit: meters) Up jC! (e), (f), (g), (h
) is shown in detail in FIG.

Next, a description will be given based on FIG. 4.

1 is a positioning device such as Omega, Loran, Detsuka, etc.
The ship's positions Log and Las are output in seconds and input into the latches 3.4, respectively, and the above Los and Las are stored by manual carry pulse of the X counter 20, which will be described later.

Reference numeral 2 denotes a compass such as a gyroconopath or a magnetic compass, which outputs the bow direction B of the ship, inputs it to the latch 5, and stores the above B by inputting a carry pulse to an X counter 20, which will be described later.

The carry pulse of the X counter 20 is stored in the depth map memory 18.
It is output every time a submarine line is written.

6.7 is an adder used to obtain Us and Vs, and 8.9 is an adder used to obtain ut and vt.

Further, 10.11 is an adder for indicating the latitude and longitude of a point on the straight line connecting the 6 points and the T point in units of seconds. The X counter 20 adds and counts from θ to N/2-1.
/Binary counter, when the count value is O, adder 1
The output of 0 and 11 is Ut.

Vt, and when the count value is N/2-1, adder 1
The outputs of 0.11 are Us and Vs. 12 and 13 are multipliers, respectively.

14 is a ROM used to calculate ΔU and Δ■ from B, Lp, and Las; The units are all seconds and are expressed by the following formula.

ΔU = -60・Lp・5inB/cosLasΔ■
冨-60・LpICO8B ΔU and ΔV represent the longitude and latitude differences between a point P (not shown) at northern latitude Las and a point pt (not shown) located Lp miles from there in the B direction.

X counter 20 and Y counter 21 are depth map memory 1
N/211 corresponding to 8! , is an N-ary counter.

The counted values of both counters 20 and 21 are set to write addresses in the depth map memory 18 through a switch 19.

The Y counter 21 is a clock pulse generator 22 (cp)
This is an N-ary counter that adds and counts the pulses output by the X counter 21 from 0 to N-1.
One point of the submarine line Lh4 is written in the depth map memory I8 while the depth map is lost.

The X counter 20 counts the carry pulses of the X counter 21, and while counting from 0 to N/2-1, the bottom line of N/2 points is written in the depth map memory 18. .

To be more specific, for example, when the count value of the X counter 20 is 0, the output values of the adder 10.11 are ut and vt, and the seabed depth Dt at point T is outputted from the seabed depth ROM15. This seabed depth Dt is manually entered into the multiplier 16 to calculate where the seabed depth output from the seabed depth ROM+5 is located in the Y direction on the screen of the display device 27, and the calculated value Dt-N/R is Output. The calculated value Dt-N/R and the count value of the y counter 2 are input to the comparator 17, and when the two values match, a match signal is output from the comparator 17 to the depth map memory 18. Based on this coincidence signal, a predetermined submarine line is written in the depth map memory 18 at addresses x=O, y=Dt-N/H.

100 is a fish finder, which is composed of a transducer 101 and a transmitter 102 attached to the bottom of the boat.
Ultrasonic pulses are output directly below the ship using the transmitted pulses from 02. The transmission pulse from the transmission atO2 is output by the carry pulse of the X counter 107. and,
The ultrasonic pulse reflected by the underwater object is sent to a transducer 10.
After being amplified and detected by the amplification/detection circuit 103, the signal is stored in the signal memory 105 via the A/D converter 104. The signal memory 105 has a storage capacity of N/2XNXl bits. Here, ■ is the received signal by I of 2.
This means that the signal is divided into multiplication-level intensities and stored in the signal memory 105. Therefore, this signal memory lO5
The counting capacity of the X counter 107 forming the write address is N/2, and the counting capacity of the X counter 108 is N.

The comparator 109, the counter 110, and the ROM 112 are circuits that divide the pulse output from the clock pulse generator 1+1 (cp) according to the value of R to determine the sampling period of the received signal. For example, the speed of sound in water is 15
00 va/sea, and assuming that the output pulse period of the clock pulse generator 111 is 1 mm 1 lec, ROMI
l 2 is 4 R/3 N[=(RX I OOO)/(
750x N)], and each time the count value of the counter 110 reaches 4R/3N, the counter 110 is reset to 0 by a coincidence pulse output from the comparator 109, and the count value of the X counter 108 becomes 4R/3N. Increase by 1.

The branch pulse obtained in this way is sent to the X counter 108.
will be sent to The X counter 108 sets the frequency divided pulse to 0.
The count is added up to N-1, and a carry pulse is sent every time the count value h(N-1 returns to O.) X counter 107
is the carry pulse from Y counter 108 from 0 to N/2-
It is configured to subtract and count up to 1, and when the count value reaches 0, it changes to N/2-1 with the next carry pulse. The above two-hand numerical value is passed through the switching circuit 106 to the signal memory +05.
As a result, the A-D converted received signal is written to the address specified by the numerical values of both hands.

At this time, the count values of the X counter 107 and the y counter +08 indicate the write position in the horizontal and depth directions of the signal memory 105, respectively. Therefore, while the count value of the X counter 108 changes from O to N-1, the signal memory 108
5, the received signals for the rows in the depth direction corresponding to R meters are written.

Fourth, while the count value of the X counter 107 changes from N/2-1 to 0, the received signal is written to all column addresses of the C8 memory +05.

Reading and displaying of the stored signals in the m-recording depth map memory 18 and the signal memory 105 is performed by a vertical sweep different from that used in a home television.

That is, in FIG. 1, a sweep is first performed from 0 to N-1 in the y direction of the rightmost column O, and then a sweep of O in the y direction of the first column is performed.
to N-1 rows, and so on, with the leftmost N-1
When the column ends, it returns to the 0th column. The X counter 35 specifies the address for reading out the display in the vertical direction, that is, the depth direction, and the clock pulse generator 36
The read address is formed by adding and counting the pulse train from (cp) from 0 to N, -1. Then, each time the count value reaches N, the vertical deflection pulse is sent to the y deflection amplifier 30.
A carry pulse is sent to the X color counter 34 each time the number reaches No. 1. However, No>N.

The X counter 34 adds up the carry pulse from 0 to Not. One loss, that's it! One loss value specifies the address in the water direction. And 1. ! A horizontal deflection pulse is sent to the X deflection amplifier 31 every time the 1 change value reaches N. When the count value of the X counter 34 is 0 to N/2-1, it is read from the depth map memory 18, and when it is N/2 to N=1, it is read from the signal memory +0.
The storage signals are read out from each of the 5 and 5.

The respective counts of the X counter 34 and the X counter 35 are:
It is input as a read address to the depth map memory 18 and signal memory +05 through switches a l 9 and +06, respectively. At this time, the count value of the X counter 34 is inputted directly to the depth map memory 18, whereas it is inputted to the signal memory 105 via the adder 113 and +14. The adder 113 is used to sequentially read signals from the signal memory 105 starting from the column in which the latest received signal is stored. The adder 114 calculates N/ from the count value of the X counter 34.
2 is subtracted, and the count value of the X counter 34 is N/2.
When it is 0, it is 0, and when it is N-1, it is N / 2-1. For example, if the count value of the +
The predetermined received signals are sequentially stored in memory, such as the received signal before the second transmission. In addition,
Here, the X counter 107 performs subtraction counting.

With the above configuration, when the count value of the X counter 34 is N/2, the output value of the adder 113 is Xo, and when it is N/2+1, it is x°+1, etc., so the image from the fish finder lOO is displayed. The latest received signal will be displayed on the right side of the screen, and the oldest received signal will be displayed on the left side.

The switching devices 19 and 106 are "ON" and "ON" when the output pulse of the clock pulse generator 36 is at the "0H" level.
When the output pulse of the clock pulse generator 36 is at the "H" level, it is "OFF". When the output pulse of the clock pulse generator 36 is at the "H" level, it is written, and when it is at the "L° level, it is read." therefore,
When the output pulse of the clock pulse generator 36 is at the "L° level," the signals at the addresses specified by the X counter 34 and the Y counter 35 are read out from the depth map memory 18 and the signal memory 105. 28 is a Y deflection. 29 is an X deflection coil, and 32 and 33 are comparators, respectively.

Note that the output pulse of the clock pulse generator 36 is “H”
Depth map memory 18 and signal memory 10 when level
A signal is written to the clock pulse generator 22.
Since the output pulse period of and 111 is longer than that of the clock pulse generator 36, the signal is written to the same location of the depth map memory 18 and the signal memory 105 many times. However, what is ultimately stored is the last written signal.

With the above configuration, the signals read from the depth map memory 18 and the signal memory +05 are output to the color conversion ROM 23. This color conversion ROM 23 is configured to display predetermined colors, and the color signals of the three primary colors are D-
The color signals are converted into analog signals through the A conversion circuits 24, 25, and 26, respectively, and the color signals are sent to the CRT display device 2.
It is led to the respective red, green, and blue brightness terminals of 7.

In addition, the ROM 14, seabed depth ROM 15, depth chart memory 18, color conversion ROM 23, and signal memory 10 in FIG.
5, counter 20.2+, 34.35.107.108
, 110, latches 3.4, 5, and switching f! 'f,
The symbols attached to the input terminals of I 9 and l 06 will be explained below.

(i) ROM+4, seabed depth ROM15, depth map memo U
1B, chromaticity aROM 23, signal memory 105 A, address input Di, data input Do data output R/W: read/write control manual power (-H” indicates writing state) (ii) Counters 20, 21, 34, 35 ,107,1
08.110 CK/clock input (operates at the rising edge of human pulse) C0 carry output,
\CLR reset input Do, counting output (■1) latch 3.4.5 D (data manual Do: data output CK: clock input (operates when the input pulse rises) (1v) switch 19.106 C: control input (It becomes "ON" when it is "H") The seabed depth ROM 15 in the above-described embodiment refers to a memory that stores the depths of many points whose seabed depths are known.

The depth of the ocean floor can be determined either by using submarine topographic maps (contour maps) published by the Japan Coast Guard, or by loading a positioning device and an ITl instrument onto a ship.

In order to write the seafloor depth from the seafloor topographic map to the seafloor depth ROM 15, first the contour line positions on the seafloor topographic map are measured with a digitizer (a device that measures positions on a flat surface), and the positions on paper are used as the contour lines. It is stored in a storage device (magnetic drum, magnetic tape, magnetic disk, etc.) along with the depth. This measurement is performed at all positions corresponding to all iso-location lines.

Next, this memory content is stored in a seabed depth ROM by an electronic computer.
The seabed depth is written in the seabed depth ROM 15 in consideration of the origin (0 point) position and scale of 15 and the origin position and scale of the topographic map.

Next, when the position and its depth are measured using a positioning device and a depth sounder on the ship, the measured values are stored in the storage device, and the seabed depth is written in the seabed depth ROM 15 in the same manner as in the above case.

The seabed depth ROM 15 of the above embodiment is configured so that the seabed depth of M seconds square in both latitude and longitude is stored every second with the 0 point as the center, but a large number of ROMs may be prepared. and R corresponding to each navigation point.
It may be configured to switch to OM.

<Effects> As explained above, according to the DFT submarine line display device for ships of the present invention, since the images of the submarine line and (Ill and fjI group) are displayed on the same screen, at each cruising position of the ship,
From there, you no longer need to check on a nautical chart to see if there are shallow waters or sunken ships ahead, and you also no longer need to compare them with images taken by a fish finder. It is possible to grasp the relative relationship with schools of fish extremely easily and accurately, and the net can be pulled as close to the seabed line as possible without worrying about getting the net caught, allowing fishing to be carried out safely and efficiently. Became.

[Brief explanation of drawings]

The drawings show an embodiment of the submarine line display device for a fishing boat according to the present invention; FIG. 1 is a front view showing an example of the display, FIG. 2 is a diagram showing the configuration of the depth map memory, and FIG. 4 is a block circuit diagram, FIG. 5 is an explanatory diagram showing the navigation direction, and FIG. 6 is an explanatory diagram showing the positions of each point of the seabed depth ROM. I5... Seabed depth ROM118... Depth map memory, 27
...Table i1 device, 100...Fish finder.

Claims (1)

[Claims] (1) A first output signal that outputs an image signal of the submarine line in front of the ship in the navigation direction, cut along a vertical plane that passes through two predetermined points in the horizontal direction.
and a second means for outputting an image signal of a fish school image from a fish finder, and a bottom line and a fish school image are displayed together on the same screen based on the image signals output from the first and second means. A submarine line display device for a fishing boat, comprising display means.