JP4547485B2 - Fish finder - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a fish finder that discriminates the signal of the seabed of the reflected digital signal and distinguishes and displays the magnification of the signal from the sea and the signal from the seabed.
[0002]
[Prior art]
In general, it is known that fish live in hard water bottoms. Therefore, in fishing, there is a desire to know the hard part of the water bottom using a fish finder. The present applicant has proposed that the second reflection and the third reflection of the reflected echo reflected at the bottom of the water are displayed as an image in addition to the underwater display (Japanese Patent Application No. 10-29193, Japanese Patent Application No. 10). -29194, Japanese Patent Application No. 10-29195, Japanese Patent Application No. 10-29196).
[0003]
[Problems to be solved by the invention]
However, in such a fish finder, when viewing the image displayed on the display device, it is necessary to know the state of the fish school by comparing the second reflection and the third reflection of the reflected echo with the normal underwater display, There was a problem that the operation was troublesome.
[0004]
[Means to solve the problem]
The present invention irradiates ultrasonic waves into the water from an ultrasonic transducer, receives the reflected echoes of the ultrasonic waves in the water and converts them into reflected echo signals, and amplifies the reflected echo signals with an amplifier. Then, the digital signal is converted into a reflected digital signal by an A / D converter, taken into a memory by a control device composed of a CPU, the reflected digital signal is read from the memory, converted into an image signal by the image conversion function of the control device, and displayed. In the fish finder displayed in the above, the reflected digital signal from the A / D converter is input to the seabed signal discriminating function built in the control device and taken into the memory, and the reflection is performed by the seabed discriminating function. upon detecting a strong submarine signal from the digital signal takes the memory to input to a fraction of the magnification function of taking the normal reflection digital signal, the main It is for displaying sequentially the display device reflected digital signal taken to re.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, in the fish finder that displays the underwater by the reflected echo of the ultrasonic wave, by displaying the reflected echo signal from the sea at a reduced magnification of the reflected echo signal from the sea, Since the second reflected echo signal is displayed below, qualitative information on the seabed can be obtained simultaneously with fine information in the sea, particularly near the seabed.
[0006]
【Example】
FIG. 1 is a block diagram of a fish finder according to an embodiment of the present invention. A memory 2 and an oscillator 3 are connected to a control device 1 composed of a CPU, an ultrasonic transducer 4 is connected to the oscillator 3, and an ultrasonic transducer. 4, an amplifier 5 is connected to the amplifier 5, and an A / D converter 6 is connected to the amplifier 5. An output of the A / D converter 6 is connected to a submarine signal discriminating function 1a built in the control device 1, and an undersea signal discriminating function 1a Are sequentially stored in the memory 3, the output of the submarine signal discrimination function 1a is input to the fractional magnification function 1b, and the output of the fractional magnification function is input to the memory 3. The output of the control device 1 is connected to the display device 7.
[0007]
In the present embodiment configured as described above, when an oscillation signal is input from the control device 1 to the oscillator 3, the oscillator 3 applies an oscillation output to the ultrasonic transducer 4, and ultrasonic waves are generated from the ultrasonic transducer 4 into the water. The reflected echo of the ultrasonic wave is received by the ultrasonic transducer 4, amplified by the amplifier 5 and converted into a digital echo signal by the A / D converter 6, and this digital echo signal is the seabed signal of the control device 1. After being input to the discriminating function 1a, it is sequentially converted into an image signal and stored in the memory 3. The image signal stored in this memory 3 is sequentially read out and input to the display device 7, and a normal underwater image is displayed. It is displayed on the device 7.
[0008]
Here, the digital echo signal output from the A / D converter 6 includes a signal having a strong seabed, and when this strong signal is detected by the seabed signal discrimination function, the output from the A / D converter 6 thereafter. The digital echo signals are sequentially stored in the memory 3 at a magnification of a fraction of the time normally stored in the memory by a magnification function 1b of a fraction, and sequentially read out following the above-mentioned underwater image signal, and the display device 7 is displayed sequentially.
[0009]
In the present embodiment, as shown in FIG. 2, a normal underwater image signal is displayed on the display device 7, and a submarine signal is displayed on the display device 7 at a magnification that is a fraction of that of the normal display. Since the top of the display of the seabed A is displayed at a normal magnification, the school of fish B is displayed at a normal magnification, but the second reflected signal C is displayed on one screen from the bottom of the seabed A. The
[0010]
In this embodiment, in addition to the display of the normal fish finder as described above, a strong seabed signal is discriminated from the input reflected digital signal, and the signal below the seabed is reduced in magnification and stored in the memory 3. Since the display device 7 displays, the second reflection of the seabed is displayed on the same screen of the display device 7, and the hardness of the seabed can be easily known by the second reflection.
[0011]
【The invention's effect】
As described above, the fish finder according to the present invention displays an underwater image at a normal magnification by an ultrasonic reflection echo, and stores a reflected digital signal below the seabed at a normal fraction. Therefore, the second reflected signal can be viewed on the same screen, and this has the advantage that the hardness of the seabed can be easily known.
[Brief description of the drawings]
FIG. 1 is a block diagram of a fish finder according to an embodiment of the present invention.
2 is a view showing a screen displayed by the fish finder of FIG. 1; FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Control apparatus 1a Submarine signal discrimination | determination function 1b Multiplier function of fraction 1 2 Memory 3 Oscillator 4 Ultrasonic transducer 5 Amplifier 6 A / D converter 7 Display apparatus

Claims (1)

Ultrasonic wave is irradiated into the water from the ultrasonic vibrator, the reflected echo of the ultrasonic wave in water is received by the ultrasonic vibrator and converted into a reflected echo signal, the reflected echo signal is amplified by an amplifier, and A / The digital signal is converted into a reflected digital signal by a D converter and is taken into a memory by a control device including a CPU. The reflected digital signal is read from the memory, converted into an image signal by the image conversion function of the control device, and displayed on a display device. in the the fish finder, the reflection digital signal from the a / D converter is input to the built-in undersea signal determination function to the control device incorporated into said memory, in said reflected digital signal at the seabed discriminating function upon detecting a strong submarine signals from capture in the memory by entering the fraction of magnification function of taking the normal reflected digital signals, taken up in the memory Fish finder and displaying sequentially the display device reflected digital signal I.

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