JPH0211112B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fish finder that displays information on fish echoes in different colors according to level. [Prior Art] In such a fish finder, there is a device that measures the amount of fish by creating a boundary line surrounding the displayed image of the fish echoes and counting the level value of the fish echoes included within this boundary line. However, the special public interest rate was 1986-22112.
It was published by and has already been patented. Furthermore, JP-A-53-101461 displays a minute marker to indicate the passage of time and a boat speed marker to indicate the boat speed in parallel at dot intervals outside the display image of the fish school echo. Disclosed by etc.
An enlarged display and a reduced display of fish school echo display images displaying minute and hour markers similar to those above are displayed side by side, and in the enlarged display part, the interval between the dots of the minute and hour markers is wide;
In the reduced part, the minute and hour markers are displayed so that the dot spacing becomes narrower according to the reduction rate.
54-156667 and others. [Problem to be solved by the invention] In the above-mentioned device for measuring the amount of fish schools, the part for counting the level of fish school echoes is complicated, so the device must be expensive and the investment will be high. The disadvantage is that it is difficult to spread to small fishing boats. Therefore, there is a problem in that it is desired to provide a simple and inexpensive product that can be easily measured by visual means. Furthermore, in order to be able to convert the displayed size of the fish school echo in the distance direction to the actual size and make a judgment, it is conceivable to use a display means that displays the above-mentioned speed markers at dot intervals. This method has the disadvantage that it is not possible to display minute-by-moment minute speed fluctuations, resulting in large errors. However, in the case of trawl fishing, etc., it is desired to provide a device that can measure the displayed size of fish school echoes in the distance direction based on the actual size and also determine the approximate boat speed. There is a problem with this. [Means for Solving the Problems] The present invention provides information on fish school echoes over time that is colored according to level and displayed in television format on the screen of a raster scanning display using main scanning and sub-scanning. In a fish finder that displays a minute marker to indicate the passage of time outside the range in which fish echo information is displayed on the screen, the minute marker is displayed as a long strip marker in the direction of the passage of time. A minute hour marker means for obtaining a band-shaped minute marker whose color alternately changes at regular intervals by alternately supplying two or three color codes to a circuit for the purpose based on signals obtained at regular intervals. Then, a two- or three-color color code is applied to the circuit that is positioned outside the above display and displays the distance marker as a long strip marker in the direction of the display's time elapsed, based on the signal obtained at each fixed distance. Distance marker means for obtaining a band-shaped distance marker that alternately changes color at every fixed distance by alternately supplying a line for enclosing the display image of the fish echo.
Two linear markers along the depth direction of the display (hereinafter referred to as a start point marker and an end point marker),
Each circuit for display using two linear markers (hereinafter referred to as upper limit marker and lower limit marker) along the time elapsed direction of display, each synchronization between main scan and sub scan for raster scan display. By giving each signal obtained by adding two variable times to each time point obtained by the signal, a start point marker, end point marker, upper limit marker,
A fish school enclosing line means that moves each of the lower limit markers to display an enclosing line that surrounds the displayed image of the fish echo with perpendicular lines, and a character generator that numerically indicates the depth values of the upper and lower limit markers. By supplying each signal obtained based on the above-mentioned synchronization signals to a character memory for determining the display location, the character image of each depth value is displayed at a position outside the enclosing line in the display. The above problem can be solved by providing a depth value display means for obtaining a depth value. [Example] Hereinafter, an example will be described with reference to the drawings. In FIG. 1, a central processing unit 1 includes a computer that reads necessary data and performs necessary calculations and controls in response to interrupt signals, as well as programs and constant data for performing these calculations and controls in the correct order. The stored ROM, the RAM that stores numerical values of intermediate results necessary for calculation and control, the data bus (DB) for inputting and outputting numerical data, and the address bus (AB) that specifies the target for exchanging data. ), and data is transferred to and from external devices other than the central processing unit 1 through input and output ports 2. The input/output port 2 is composed of a group of gates that gate read, write, etc. signals from the central processing unit 1 by the output of a decoder group connected to the address bus. Various control signals are generated along with programs executed by the central processing unit 1. Timing pulse generator 3 is input and output port 2
A group of preset counters that generates a pulse of a specified period in a specified period according to the data when necessary period data is set through the data bus by a write signal from the
Fish school echo sample pulse for receiving in response to transmission pulse transmission start according to each fish school cycle;
A reception start interrupt pulse and the like are generated here to notify the central processing unit 1 of the start of the fish school cycle. The sub-scanning line signal generator 4 is a part that generates a synchronizing signal that controls the line-scanning part of the raster scan of the television, and uses a video clock (V.
It consists of a counter (sub-scanning address counter) with a specific number of digits for counting CK), and its carry output is sent to the next-stage main-scanning signal generator 5, which controls the area scanning portion of the raster scanning of the television. Create a sync signal. The main scanning signal generator 5 also consists of a counter (main scanning address counter) with a specific radial number. The carry of the sub-scanning signal generator 4 is also guided to a fish school image feeding direction address counter 6 which has the same base number as the main scanning signal generator 5, and the main scanning signal generator 5 and the fish school image feeding direction address counter 6 are connected to each other. Count at the same time. In addition to the carry input from the sub-scanning signal generator 4, the screen feed signal from the input and output ports 2 is also input to the fish school image feed direction address counter 6 as a counting input. The contents of the feed direction address (main scanning signal generator) 5 of the still screen and the contents of the feed direction address (feed direction address counter for fish school image) 6 of the moving screen become different values by the amount of time. Each digit output of the sub-scanning signal generator 4 is led to a decoder 7, which outputs a TV line synchronization signal (), a minute marker in the water depth direction, a distance marker, and a position where the fish school image is displayed on the screen. The color cathode ray tube display 28 and the AND gates 131, 132, 133 each generate a control signal to
be led to. Each digit output of the main scanning signal generator 5 is led to a decoder 8, which generates both a TV synchronization signal () and a video start address reading signal as outputs, and each outputs a color cathode ray tube indicator 28 and a video start address. is led to the register 19 for use. The high-order digit outputs of the sub-scanning signal generator 4 and the main-scanning signal generator 5 also pass through the C/RAM address switch 9 and become address inputs for the character memory (C/RAM) 11.・Except when writing character data from the data bus using the RAM write signal, the C.RAM11
The character data written to the sub-scanning signal generator 4 and the main-scanning signal generator 5 are sequentially called out and guided to the character generator 12 according to changes in the address input from the main scanning signal generator 5, and the sub-scanning signal With the help of the lower digit outputs of the scanning signal generator 4 and the main scanning signal generator 5, a character display signal synchronized with raster scanning of the television is sent to the character inserter 25. The character data in the C-RAM 11 includes a control bit that determines whether or not to display characters on the display, and by setting this bit to <0>, characters are prevented from appearing in locations other than where necessary. . Each digit output of the sub-scanning signal generator 4 and the feed direction address counter 6 for fish school images is sent to the fish school image memory (V.RAM) via the V-RAM address switch 10.
18 address input, and the video data previously written to the V.RAM 18 is used, except when writing video data from the buffer memory 15 using the V.RAM write signal from the input/output port 2. are sequentially called in accordance with changes in the address input from the sub-scanning signal generator 4 and the fish school video feeding direction address counter 6, and guided to the character inserter 25 and level decoder 29, where the character inserter 25 converts the fish school video and the character display signal is superposed. As a result, as shown in Figure 2A,
Boundary line surrounding fish school image 111 described later...
At a position outside the enclosing line formed by 108
It can be displayed like this. A transmission pulse sent out from the timing pulse generator 3 every fish finder cycle is guided to the transmitter 24, and a high frequency transmission pulse corresponding to the pulse width is sent out from the transducer 211 into the sea via the transmission/reception switch 212. The resulting fish school echoes are guided from the transducer 211 to the receiver 22 via the transmitter/receiver switch 212, where the amplified and detected output is
The signal is guided to the buffer memory 15 via the D converter 23. The write/read address of the buffer memory 15 is given by the buffer memory address counter 16, and after the buffer memory address counter 16 is reset to zero by the reception start interrupt signal from the timing pulse generator 3, Similarly, the fish school echo sample pulse from the timing pulse generator 3 passes through the OR gate 17 and becomes a count signal to the buffer memory address memory 16 and a write signal to the buffer memory 15.
The fish school echo signals from the A/D converter 23 are sequentially written to the buffer memory address counter 16 at regular intervals, and the end of writing to the buffer memory 15 is detected by the end-clear of the buffer memory address counter 16. The reception completion interrupt signal is sent to buffer memory address counter 16.
from the central processing unit 1 and the timing pulse generator 3
send to The timing pulse generator 3 thereby stops the fish school echo sample pulse for the corresponding buffer memory. Transfer from the buffer memory 15 to the V-RAM 18 is performed by specifying the V-RAM write address from the central processing unit 1 to the V-RAM address switch 10 using the V-RAM write signal from the input/output port 2. This is sequentially performed by switching to pass the signal from the address bus, and at the same time counting through the OR gate 17 to the buffer memory address counter 16 to advance the read address of the buffer memory 15 one by one. At that time, the output of the buffer memory 15 passes through the AND gate 133 and the OR gate 14 and becomes the input of the VRAM 18.
The minute marker and distance marker are AND gate 131,
From 132, enter V.RAM18 via OR gate 14. When the line scan of the TV screen reaches the left end of the vertically arranged TV screen (the final position of the video), the video start address read signal output from the decoder 8 sends the fish school video feed direction address to the video start address register 19. Each digit output of the video feed direction address led from the counter 6 is latched, its contents are input, and the tri-state gate 2 receives the video start address read signal from the output port 2.
0 and is read to the central processing unit 1 via the data bus, and becomes the write address when writing new fish school echo information from the buffer memory 15 to the VRAM 18. Every time one day's worth of fish echo information from the buffer memory 15 is written to the V-RAM 18,
A screen feed signal is sent as a counting pulse from the input and output ports 2 to the feed direction address counter 6 for fish school images, and the feed direction address counter 6 for fish school images is sent as a counting pulse.
The relative relationship between the main scanning signal generator 5 and the main scanning signal generator 5 changes by one, and the fish school image moves by one line in the feed direction with respect to the still screen. As a result, the latest fish school image written at the left edge of the screen (the final position of the image) is brought to the right edge of the screen (the image start position). TV synchronization signals from decoders 7 and 8 above
Since HE and VE are negative pulses corresponding to the blanking periods of line scanning and area scanning, respectively, their rising points correspond to the start positions of line scanning (depth direction scanning) and area scanning (feeding direction scanning), respectively. . Therefore, the output of the monostable multi 38 obtained by triggering the monostable multi 37 at the rising edge of HE and triggering the monostable multi 38 at the falling edge of the output of the monostable multi 37 is the pulse of the monostable multi 37 and 38. If the width is T ₃ and T ₄ , the top edge of the screen is the target.
The signal corresponds to the depth from T ₃ to T ₃ + T ₄ , and the monostable multi 33 is triggered by the rise of VE , and the monostable multi 34 is triggered by the fall of the output of the monostable multi 33. stable multi 3
If the pulse widths of monostable multi 33 and 34 are T ₁ and T ₂ , the output of 4 is T ₁ with the right edge of the screen as the standard.
The signal corresponds to the time from T ₁ + T ₂ . The output widths of the above monostable multis 33, 34; 37, 38 are respectively the volumes VR ₁ , VR ₂ ; VR ₃ ,
If VR ₄ can be used to change the values, the values of T ₁ and T ₁ +T ₂ corresponding to the range in the feed direction and T ₃ and T ₃ +T ₄ corresponding to the range in the depth direction can be arbitrarily changed. The outputs of the monostable multis 33 and 34 are routed to fall detectors 35 and 36, respectively, and with the help of HE as a clock pulse, the monostable multis 33 and 3
4, that is, at the time positions T ₁ and T ₁ +T ₂ , the signals for the line scanning body are obtained from the falling detectors 35 and 36, and the outputs of the monostable multis 37 and 38 are detected as falling, respectively. Lead to vessels 39 and 40, clock
With the help of VCH as a pulse, a signal for one image point falls at the rising points of the monostable multis 37 and 38, that is, at the depth positions of T ₃ and T ₃ +T ₄ , and the falling detector 39
and 40. Fall detectors 35 and 39 are connected to AND gate 421
Since the output obtained by leading to the line represents the intersection group of T ₁ and T ₃ to (T ₃ +T ₄ ), it becomes a signal corresponding to the right side of the boundary line illustrated in FIG. 2A. The output obtained by leading the falling detector 36 and the monostable multi 38 to the AND gate 422 means the intersection group of T ₂ and T ₃ to (T ₃ +T ₄ ), so the boundary illustrated in FIG. 2A is The signal corresponds to the left side of the line. monostable multi 3
4 and the falling detector 40 to the AND gate 431 means the intersection group of T ₃ ~ (T ₃ + T ₄ ) and T ₁ + T ₂ , so the boundary line illustrated in FIG. The signal corresponds to the lower side. monostable multi 3
4 and the falling detector 39 to the AND gate 432 means the intersection group of T ₃ ~ (T ₃ + T ₄ ) and T ₁ , so the upper side of the boundary line illustrated in FIG. It becomes a corresponding signal. Therefore, the above AND gates 421, 422; 4
The output obtained by guiding 31, 432 to the OR gate 45 becomes a signal corresponding to the four sides of the boundary line illustrated in FIG. A video signal is obtained as the output of the boundary line inserter 26 by superposing the boundary line information on the video signal (fish school image + character display) led to the line inserter 26 . The output of the boundary line inserter 26 is converted into a color signal corresponding to a signal level code by a color signal generator 27, and becomes a video signal to be sent to a color cathode ray tube display 28. When inserting characters and boundaries into a fish school image using the character inserter 25 and boundary line inserter 26, the colors of the characters and boundaries are determined by the colors used when writing character data from the central processing unit 1 to the CRAM 11. Although it is determined by the color code specification, a specific color is determined by hardware for the border line. In cases where it is possible to select a plurality of boundary water areas, it is advantageous to allow the colors of the boundary lines to be specified arbitrarily using software means for distinguishing them. The minute and distance markers to the AND gates 131 and 132 are given by a timer and an electromagnetic log, respectively, and two or three color codes are alternately displayed at the top of the screen at fixed time or fixed distance intervals in the upper area of the video screen. Supplies to the corresponding VRAM. The reason why both the minute marker and the distance marker are drawn at the top of the image is that by contrasting the frequency of their color changes, it is possible to determine the speed of the transducer through the water, or in other words, the speed of the boat equipped with the fishfinder. It was made so that it could be judged. In the above explanation, as shown in FIG. As shown in FIG. 2B, an upper limit marker 103 corresponding to the upper side, a lower limit marker 104 corresponding to the lower side, a starting point marker 105 corresponding to the right side, and an end point marker 106 corresponding to the left side are set to fill the entire display screen. To display in a straight line, fall detector 3
Each output of 5, 36, 39, 40 is connected to AND gate 4
It is common knowledge that the information should be given to the OR gate 45 without passing through 21, 422, 431, and 432, and there is no need to explain it in particular. [Effects of the Invention] According to the present invention, as described above, it is possible to simultaneously display a minute marker and a distance marker for displaying the distance traveled, and also to display an encircling line surrounding a fish school image. Therefore, by comparing the length of the upper side of the encirclement line with the length of the distance marker, you can judge the size of the school of fish in the distance direction, and you can also roughly determine the size of the school of fish in the distance direction from the degree of color change of the minute marker and the degree of color change of the distance marker. can determine the ship's speed. Since the depth values of the upper and lower sides of the encircling line surrounding the fish school image are displayed, the size of the fish school in the depth direction can be determined from these values, and the depth value can be added to the outside of the enclosing line. Because the color display of fish echoes within the encircling line does not interfere with level reading, it is as easy as adding a circuit for generating line markers using four variable times and a circuit for inserting depth characters. It has the advantage that it can be provided with an inexpensive configuration.

[Brief explanation of drawings]

The drawings show an embodiment, and FIG. 1 is a block diagram, and FIGS. 2A and 2B show images displayed on a display screen. 101... Minute and hour marker, 102... Water distance marker, 103... Upper limit marker (variable), 104... Lower limit marker (variable), 105... Start point marker (variable),
106... End point marker (variable), 107... Upper limit depth display, 108... Lower limit depth display, 111... Fish school image, 112... Oscillation line, 113... Seabed image, 114...
Image feeding direction, 1... Central processing unit, 2... Input, output port, 3... Timing pulse generator, 4... Sub-scanning signal generator (sub-scanning address counter), 5
...Main scanning signal generator (main scanning address counter), 6...Fish school image feeding direction address counter, 7...Decoder, 8...Decoder, 9...C.
RAM address switch, 10...V/RAM address switch, 11...C/RAM (character memory), 12
...Character generator, 131...And gate, 132...
AND gate, 133...AND gate, 14...OR gate, 15...Buffer memory, 16...Buffer memory address counter, 17...OR gate, 18...V RAM (memory for fish school images),
19...Video start address register, 20...
Tri-state gate, 211...transducer; 212...transmission/reception switch, 22...receiver, 23...
A/D converter, 24... Transmitter, 25... Character inserter, 26... Border inserter, 27... Color signal generator,
28... Color cathode ray tube display, 33, 34... Monostable multi, 35, 36... Falling detector, 37,
38... Monostable multi, 39, 40... Falling detector, 421, 422, 431, 432... AND gate, 45... OR gate, DB... Data bus,
AB...address bus, V/CK...video clock.

Claims (1)

[Claims] 1. Information on fish school echoes over time is colored according to level and displayed in television format on the screen of a raster scan display using main scanning and sub-scanning, and the information on the screen is displayed. In a fish finder (hereinafter referred to as the device) that displays a minute marker outside the range where the time elapses, a) the minute hour marker is displayed as a long band-shaped marker in the direction of the time elapsed in the display; A minute hour marker that obtains a band-shaped minute marker whose color alternately changes at regular intervals by alternately applying two or three color codes to a circuit for changing the color based on signals obtained at regular intervals. means; b. A circuit for displaying a distance marker as a long band-shaped marker in the direction of time elapsed in the display, which is positioned on the outside, is provided with two or three colors based on the signal obtained at each fixed distance. distance marker means for obtaining the band-shaped distance markers that alternately change color at regular intervals by alternately applying codes; two linear markers along the direction of the display (hereinafter referred to as a start point marker and an end point marker); and two linear markers along the time elapsed direction of the display (hereinafter referred to as an upper limit marker and a lower limit marker). For each time point obtained by each synchronizing signal of the main scanning and the sub-scanning,
By giving each signal obtained by adding two variable times to each, the start point marker, end point marker, upper limit marker, and lower limit marker are moved to surround the displayed image of the fish school echo with orthogonal lines. fish school enclosing line means for obtaining an enclosing line display; d) a character memory for determining the location where each depth value of the upper limit marker and lower limit marker is displayed numerically by a character generator, based on each of the synchronization signals; and depth value display means for obtaining a display of a character image of each of the depth values at a position outside the enclosing line by providing each signal obtained by the depth value. 2. The device according to claim 1, comprising: a. parallel display means for displaying the minute marker and the distance marker in a vertically overlapping manner; and b. each length of the start point marker and end point marker. and a fish school enclosing line display means for displaying the information by a length covering the entire range in which the information is displayed. 3. The device according to claim 1, comprising: (a) the minute marker means for providing a signal obtained at fixed time intervals based on a signal obtained from a timer; and (b) based on a signal obtained from an electromagnetic log. said minute marker means for providing a signal obtained at said fixed distance intervals.