JPS5952392B2 - Display method on fish finder - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a fish finder capable of detecting the presence or absence of a school of fish underwater, and more specifically, a fish finder capable of detecting the presence or absence of a school of fish in multiple directions such as in front of the water, directly below, to the left, and to the right. This relates to a fish finder that allows you to see the presence or absence of schools of fish in multiple directions at the same time, and each display can be made easy to see, and the displays of schools of fish in each direction can be viewed mutually. The purpose is to provide a display method for a fish finder that allows easy identification.

The drawings 1 to 4 showing embodiments of the present application will be described below.

1a is a forward-facing receiver, and when a transmitted pulse emitted from a forward-facing transmitter hits a school of fish or other object and is reflected on a ship equipped with this fish finder, It receives reflected waves and converts them into electrical signals.

1b is a downward receiver that similarly receives reflected signals from below, 1C is a left receiver that receives reflected signals from the left, and 1d is a receiver that receives reflected signals from the right. The right receiver is shown to receive signals.

As is well known, each of these delivery devices is used by being fixed to the ship's hull.

In addition, in these delivery devices and the parts described below, the lowercase letters attached to the numerical codes indicate that the parts with the same alphabella 1~ belong to the same system (for example, forward direction or downward direction, etc.). In the following explanation, these alphabetic subscripts will be omitted unless it is particularly necessary.

Reference numeral 2 denotes a receiving circuit which amplifies the received signal from the receiver 1.

Reference numeral 3 denotes a control circuit, which is provided to cut off signals from the receiving circuit 2 to a recorder, which will be described later.

4 shows a well-known mixer circuit, which includes a large number of control circuits 3a,
It is provided to combine signals from 3b, 3C, and 3d into one.

Reference numeral 5 denotes an amplifier circuit provided as necessary, and is provided to amplify the output signal from the mixer circuit 4 to a level sufficient to operate the recorder 6 of the person.

Next, in the well-known recorder 6, 7 indicates a recording pen, and 8 indicates an operating device for the recording pen 7, which rotates the recording pen 7 and displays the signal from the amplifier circuit in the effective recording width on the recording surface of the recording paper. It is configured so that it can be used.

Reference numeral 9 denotes a synchronization signal detection section, which uses the synchronization signal from the detection section to operate a control signal sending circuit or a transmitter that generates a transmission pulse.

Next, the control signal sending circuit 10 will be explained.

This circuit 10 is composed of a large number of well-known logic circuit elements, and 11 is an oscillation circuit, and 12 is a frequency dividing circuit, which divides the oscillation output of the oscillation circuit 11 into several Kffi, for example, 8 kHz. be.

13 is a 4-bit binary counter, 14 is a decoder demultiplexer that converts 4 lines into 16 lines, 15 is a 4-bit binary counter, 16 is a 4-input gate, and 17 and 18 are each 16-bit data selectors. The multiplexers 19 and 20 are inverters, and 21a, 21b, 21C, and 21d are waveform shaping circuits, for example, monostable multivibrators.

Next, FIG. 2 showing an example of the control circuit 3 will be explained.

Reference numeral 22 denotes an input terminal to which a signal from the receiving circuit 2 is input.

Reference numeral 23 denotes an output terminal for sending an output signal to the mixer circuit 4.

Reference numeral 24 denotes a control signal input terminal which receives a signal from the waveform shaping circuit 21.

T1. T2 is a well-known transformer, and Ql and Q2 are well-known transistors, which are connected as shown in the diagram together with the resistors and capacitors indicated by symbols, and when the control signal to the control signal input terminal 24 is at H level, the input signal is The signal input to the terminal 22 is sent out as it is to the output terminal 23, and when the control signal is at L level, the signal input to the input terminal 22 is cut off so that no signal is sent to the output terminal 23. .

With the above configuration, when the recorder 6 is activated and a synchronization signal is sent out from the synchronization signal detection section 9, this synchronization signal is sent to a well-known wave transmitting circuit (not shown), and various underwater signals are transmitted. Transmit pulses are sent out in each direction from the oriented transmitters.

When there is a school of fish in front of the transmission pulse in this manner, and the reflected wave from this school of fish is received by the forward receiver 1a, the transfer signal is sent to the reception circuit 2a, control circuit 3a, mixer. The signal is sent to the recording pen 7 of the recorder 6 via the circuit 4 and the amplifier circuit 5, and as is well known, as the recording pen rotates, a fish shadow is displayed on the recording surface of the recording paper.

On the other hand, the synchronization signal is also input to the control signal sending circuit 10.

In the control signal sending circuit 10, this synchronizing signal is input to the binary counter 15, and its output is further input to the gate 16.
is input.

In these cases, as is well known, each time the 16th synchronization signal enters the counter 15, the output of the gate 16 becomes L level.

This L level signal is sent to the control circuit 3a as a control signal via the waveform shaping circuit 21a.

Therefore, the signal sent from the receiver 1a to the recorder 6 is interrupted only during one scan of the recording pen 7 being scanned 16 times by the actuating device 8, and as a result, the signal sent to the recorder 6 is A vertical striped pattern as shown in FIG. 3A is displayed.

In this case, if the feeding speed of the recording paper in the recording device is 0.2 mm per one scan of the recording pen, a vertical striped pattern with a width of 3.2 mm will be obtained.

Also, if you want to change the width of the white outline, use the waveform shaping circuit 21a.
Therefore, the duty cycle of the control signal output from the waveform shaping circuit 21a may be changed.

Next, a case will be described in which a reflected signal from below is detected by the downward receiver 1b.

In this case, the signal sensed by the receiver 1b is transmitted to the receiving circuit 2b, the control circuit 3b, the mixer circuit 4, as in the previous case.
, are sent to the recording pen 7 in the recorder 6 via the amplifier circuit 5.

On the other hand, the synchronization signal is sent to the oscillation circuit 11, frequency dividing circuit 12, and binary counter 13 in the control signal sending circuit 10.

The oscillation output from the oscillation circuit 11 is frequency-divided by the frequency divider circuit 12 and further inputted to the demultiplexer 14 via the binary counter 13 .

It should be noted that the oscillation circuit 11, the frequency dividing circuit 12, and the binary counter 13
is reset by the above-mentioned synchronization signal, and synchronization is achieved every scan (one rotation) of the recording pen 7.

The output of demultiplexer 14 is controlled by the well-known operation in logic circuits of this type, so that each time the state of the input of demultiplexer 14 changes, its output 14. ．． 14□・・・・
. . 14 become L level one after another.

The signal at the output terminal 14o of the demultiplexer 14 is then sent to the waveform shaping circuit 21b, and its output is sent as a control signal to the control signal input terminal of the control circuit 3b.

Therefore, the signal sent from the receiver 1b to the recording pen 7 is cut off every time the control signal to the control circuit 3b becomes L level when the recording pen 7 scans the recording paper.

Therefore, one scanning line by the recording pen 7 is a broken line in which the length of the displayed portion is 15 and the white portion is 1.

By continuing scanning in this state, a horizontal striped pattern is displayed on the recording paper as shown at the beginning of Figure 3.

Of course, in order to form the correct horizontal stripes as shown in the figure, the oscillation circuit 11 . The frequency dividing circuit 12 and the binary counter 13 are reset and synchronized every time the recording pen is scanned.

When performing such recording, for example, the width of the recording paper is 204 mm.
mm, its effective recording width is 192 mm, and the sounding range is 90 m.
In this case, the time required for the recording pen to scan the effective recording width is 120m5eC, so if the period of the output signal from the frequency dividing circuit 12 is 8KPh as described above, the time required for the recording pen to scan the effective recording width is 3.2m5eC.
It becomes a horizontal striped pattern with a width of m, and the width of the white part is 0.2 mm.

Note that when creating a horizontal striped pattern in this way, as in the case of the vertical striped pattern described above, the waveform shaping circuit 21 is used to change the width of the white outline.
It is sufficient to change the duty cycle of the control signal which is the output in b.

Next, a case where a reflected signal from the left direction is received by the left direction receiver 1C will be explained.

In this case as well, the signal from the transfer device 1C is sent to the recording pen 7 via the receiving circuit 2C1 control circuit 3C, mixer circuit 4, and amplifier circuit 5, as in the case described above.

On the other hand, a synchronization signal is sent from a synchronization signal detection section 9 in the recorder 6 to a control signal sending circuit 10.

In the control signal sending circuit 10, the output terminal of the multiplexer 17 receives the above-mentioned horizontal stripe pattern every time a synchronization signal is issued, that is, every time the recording pen scans, by an operation well known in this type of logic circuit. When the control circuit is drawn, an H level signal appears which is out of phase with the control circuit by 1/16 cycle.

This signal is input as a control signal to the control circuit 3C via the inverter 19 and the waveform shaping circuit 21C.

For this reason, the white portion of the scanning line on the recording paper is shifted (delayed) by 1 every time the recording pen 7 scans.

For this reason, a striped pattern running downward to the right appears on the recording surface of the recording paper as shown in FIG. 3C.

The slope of this striped pattern depends on the paper feed speed, the scanning speed of the recording pen 7, or the frequency dividing circuit 12 in the control signal sending circuit 10.
However, if the output frequency of the frequency dividing circuit 12 and the conditions of the recorder 6 are the same as described above, the feed speed of the recording paper will be changed depending on the frequency of the output of the recording pen A. If it is 0.2 mm, it will be a striped pattern with an inclination of 45 degrees.

Note that in order to change the width of this white part, the duty of the control signal is changed by the waveform shaping circuit 21C as in the case described above.
Just change the cycle.

Next, when a reflected signal from the right direction is detected by the right direction receiver 1d, the same operation as in the case of the left direction is performed.

In this case, since the relationship between the output of the demultiplexer 14 and the human power of the multiplexer 18 in the control signal sending circuit 10 is opposite to the above case as is clear from the figure, the striped pattern displayed on the recording surface is 3N: It becomes a striped pattern upward to the right as shown in .

Next, for example, when reflected signals from the left and right directions are simultaneously detected by the left receiver 1d and the right receiver 1d, the output signals from the respective control circuits 3C and 3d are sent to the mixer circuit 4. The signals are mixed, and a mixture of both signals is sent to the recorder 6.

In this case, if the respective signal levels are relatively weak, a pattern in which the striped patterns of the respective signals overlap can be determined as a change in density, as shown in FIG. 4A.

Also, if the signal level is strong enough to saturate the mixer circuit 4 and the amplifier circuit 5, a mesh pattern is created by overlapping the striped pattern in the case of the left direction and the striped pattern in the case of the right direction, as shown in Figure 4. Only the intersections of the lines appear white.

Note that such a mesh pattern as an overlapping striped pattern is not limited to the left direction or the right direction, but can similarly be recognized in the front direction, downward direction, etc.

Next, FIGS. 5 to 7 showing different embodiments of the present application will be explained.

These figures show an additional circuit added to the previous embodiment so that the mesh pattern can be more clearly recognized when striped patterns in different directions are overlapped.

In FIG. 5, numeral 31 denotes a waveform shaping circuit which digitizes the output signal from the receiving circuit 2. For example, a circuit having a circuit configuration as shown in FIG. 6 is used.

In FIG. 6, numeral 37 indicates an input terminal, and numeral 38 indicates an output terminal, and the circuit has a circuit configuration as depicted using symbols in the figure.

In such a circuit, when a human input signal as shown in the figure is input to the input terminal 37, the collector waveform of transistor Q3 becomes as shown in the figure, which is further inverted by the inverter 39 and outputted to the output terminal 38 as shown in the figure. A similar waveform appears.

32 is a well-known two-input gate, 33 is also a well-known four-input gate, and 34 is an inverter.

Reference numeral 35 denotes a control circuit, and its configuration can be similar to that of the control circuit 3 shown in the previous embodiment, for example.

Further, 36 indicates a well-known inverter.

In such a configuration, the control signal sending circuit 10'
As shown in FIG. 6, the L level and H level of the control signal from the previous embodiment are inverted from those in the previous embodiment.

This control signal is input to the gate 32, and the waveform shaping circuit 3
When the signal from 1 is in the state shown in FIG. 6, a signal with the waveform shown in the figure appears at its output terminal.

As is clear from the description of the previous embodiment, this signal is a waveform signal that corresponds to striped patterns in various directions as described above for each gate 32a, 32b, 32C, and 32d.

Signals from these gates 32a, 32b, 32C, and 32d are combined at gate 33.

Note that the output of the gate 33 is the gate 32a, 32b, 32C,
When any of the outputs of 32d becomes L level, it also becomes H level.

The output of this gate 33 is inverted by an inverter 34 and applied to a control circuit 35.

In the control circuit 35, as in the case described above, the signal from the mixer circuit 4 to the amplifier circuit 5 is cut off while the signal from the inverter 34 is at the L level.

Due to this operation, the recording surface of the recorder 6 has the seventh
A display as shown in the figure is made.

That is, when the reflected waves are simultaneously sensed by the left and right receivers 1C11d, as shown in A in the same figure,
In the case of the front and left directions, a mouth-like display is made, and in the left direction, directly below, and right direction, a letter like C is shown, respectively.

Next, FIG. 8 showing a further different embodiment of the present application will be described.

This figure shows a display similar to that in the first embodiment, two
This figure shows a block circuit of a fish finder operated by a recorder 46 having two recording pens 47 and 47', and signals from control circuits 3a, 3b, 3C, and 3d are sent to two mixer circuits as shown. 44. The signals are combined at 44' and sent to recording pens 47 and 47'.

In the above embodiments, each display is made into a thin striped pattern of white parts, but the ratio of black and white can be changed as necessary by inverting the L level and H level of the control signal. This can be done at will.

. Furthermore, the handling of H level and L level in various logic circuit elements is also done arbitrarily, as is well known in this type of circuit.

As described above, in this invention, when detecting a school of fish underwater, all the signals from a plurality of receivers each receiving reflected signals from different directions are sent to a recorder, and these signals are recorded. Since it is displayed on the screen, you can see the presence or absence of schools of fish in multiple directions such as in front, directly below, to the left, and to the right.You can also see the condition of a wide range of underwater conditions, making it easy to monitor the condition of schools of fish. It has the advantage of being able to be accurately grasped.

Moreover, since these signals are displayed in a superimposed manner on the recording surface, the presence or absence of schools of fish in multiple directions as described above can be seen simultaneously, making it possible to grasp the status of schools of fish as described above. This has the advantage that it can be carried out more accurately.

Furthermore, even if the presence or absence of schools of fish is displayed in multiple directions as described above, the signals from each of the above-mentioned transfer devices are displayed in a superimposed manner over one effective recording width on the recording surface. There is also the advantage that the display in each direction can be widely displayed on the same display surface, and the display can be made extremely easy to see.

Furthermore, even if the signals are superimposed on the same display screen as described above, the display will have a different pattern depending on the signal from each transfer device. It is easy to identify each direction, and it also has the advantage of being able to accurately determine the location of schools of fish underwater.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application. Fig. 1 is a block circuit diagram of a fish finder, Fig. 2 is a diagram showing one example of a control circuit, and Figs. 3 and 4 are display patterns on a recording surface. Figures 5 to 7 show different embodiments, where Figure 5 is a block circuit diagram of a fish finder, Figure 6 is a diagram showing one example of a waveform shaping circuit, and Figure 7 shows a diagram showing an example of a waveform shaping circuit. 8 is a diagram showing a display pattern on a recording surface, and FIG. 8 is a diagram showing a further different embodiment of the fish finder. 1... Delivery device, 3... Control circuit, 6.
...Recording device, 7...Recording pen, 10...
...Control signal sending circuit.

Claims (1)

[Claims] 1. A plurality of transfer devices are provided each receiving reflected signals from different directions, while all the signals from the plurality of transfer devices are superimposed on one effective recording width on the recording surface using ① or multiple recording pens. A recorder is installed to record data, and in each circuit from the above-mentioned transfer device to the recorder, a cut is placed in the display on the recording surface by cutting off the signal from each transfer device to the recorder. In addition, these control circuits generate signals at a cycle such that the pattern of the above-mentioned breaks on the recording surface becomes a mutually different pattern for each signal from each transfer device. A display system for a fish finder, characterized in that fish shadows are displayed in different patterns for each receiver on the recording surface so as to block the waves.