JP2004170169A - Fish detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fish detector which enables smooth display even when a picture is rough and which can solve a problem that it is very difficult to see a picture due to a large level difference between a first signal S1 and a second signal S2, that is caused by a tilt existing between them since a transmission/reception signal once transmitted/received by an ultrasonic vibrator 2 and stored in a storage device 5 is read out twice from the storage device to display it on a display device 7. <P>SOLUTION: An output of an ultrasonic vibrator 9 is converted with an A/D conversion section 11. An output of the A/D conversion section 11 is inputted into a gate section 12. Each output of the gate section 12 is switched over and inputted into a first storage section 13 or a second storage section 14. An output of the first storage section 13 is inputted into a complement section 15 and a picture signal conversion section 16. An output of the second storage section 14 is inputted into the complement section 15 and the picture signal conversion section 16. An output of the complement section 15 is inputted into the picture signal conversion section 16, and an output of the picture signal conversion section 16 is inputted into a display section 17. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fish finder that displays a coarse display smoothly.
[0002]
[Prior art]
Conventionally, in an ultrasonic fish finder, as shown in FIG. 3, a reflected wave of an ultrasonic wave radiated into water from an ultrasonic transducer 2 by an oscillation output from an oscillator 1 is received by the ultrasonic transducer 2, and this reflected The wave is amplified by the receiver 3 and converted into a digital signal by the A / D converter 4, the digital signal is temporarily stored in the storage device 5, and the signals stored in the storage device 5 are sequentially read out to convert the image signal. The output from the image signal converter 6 is converted into a signal, and the output of the image signal converter 6 is displayed on a display device 7 like a water surface A1, a water bottom A2, and a school of fish 3, as shown in FIG.
[0003]
[Problems to be solved by the invention]
However, in this ultrasonic fish finder, when one transmission / reception signal A1, A2, A3, A4 is displayed on one line of the display screen as shown in FIG. In this case, it is difficult to see the change in the image within the narrow width, and therefore, as shown in FIG. 5B, the image displayed on the display device 7 is enlarged and transmitted and received by the ultrasonic transducer 2. In this case, one transmission / reception signal stored in the storage device 5 is read out twice from the storage device 5 and displayed on the display device 7, so that the signal B1, B2, B3, and B4 are inclined between the signals. When there is, there is a problem that the gradient between the signals B1, B2, B3, and B4 has a large step, and the image is very unnatural and difficult to see.
[0004]
[Means to solve the problem]
The present invention provides an ultrasonic oscillator, an oscillator for applying an oscillation output to the ultrasonic oscillator, a receiver for amplifying a reflected wave received by the ultrasonic oscillator, and converting the output of the receiver to digital. An A / D conversion unit, a first storage unit that stores an output of the A / D conversion unit, a second storage unit that stores a next received digital signal from the A / D conversion unit, 1, a complementing section that complements the signal read from the second storage section by taking a correlation, an output signal of the first storage section, an output signal of the second storage section, and an output from the complementing section. An image conversion unit for converting a signal into an image signal; and a display unit for displaying an output of the image conversion unit. The output signal from the first storage unit, the output signal from the complementing unit, and the second storage unit And outputs the output signals sequentially from the first storage unit, and the complement unit stores the first storage unit. By adding the output signal from the al output signal and the second storage unit is intended for calculating the half.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
According to the present invention, an ultrasonic signal transmitted and received by an ultrasonic transducer is received by a receiver, and digital signals converted by an A / D converter are stored in first and second storage units, respectively. The output signal from the storage unit and the output signal from the second storage unit are correlated and complemented by the complementing unit, so that the first storage unit, the complementing unit, and the second storage unit are output in this order, and the image signal is output. Is input to the display unit. Therefore, even if the inclination of the signal is large, the steps are smooth and the display is very easy to see.
[0006]
【Example】
FIG. 1 is a block diagram of a fish finder according to an embodiment of the present invention. The output of an oscillating unit 8 is input to an ultrasonic vibrator 9, the output of the ultrasonic vibrator 9 is input to a receiver 10, and the receiving unit 10 Is input to the A / D conversion unit 11, the output of the A / D conversion unit 11 is input to the gate unit 12, and the output of the gate unit 12 is stored in the first storage unit 13 and the second storage unit 14, respectively. The input is switched and the output of the first storage unit 13 is input to the complement unit 15 and is also input to the image signal conversion unit 16, and the output of the second storage unit 14 is input to the complement unit 15. At the same time, the signal is input to the image signal conversion unit 16, and the output of the complementing unit 15 is input to the image signal conversion unit 16, and the output of the image signal conversion unit 16 is input to the display unit 17.
[0007]
In the fish finder of the present embodiment configured as described above, when an oscillation output is applied to the ultrasonic vibrator 9 from the oscillating unit 8, the ultrasonic vibrator 9 irradiates the ultrasonic wave into the water and floats in the water. An ultrasonic wave reflected from an object or the bottom of the water is input to the ultrasonic vibrator 9, the input signal is amplified by the receiving unit 10, converted into a digital signal by the A / D converter 11, and stored in the first storage unit 13. The next received signal from the ultrasonic transducer 9 is stored in the second storage unit 14, and the received signal stored in the first storage unit 13 is read as shown in FIG. Then, the image signal is converted into an image signal by the image signal conversion unit 16 and displayed as the signal S1 on the display unit 17, and the reception signal of the first storage unit 13 is input to the complement unit 15, and at the same time, the second storage unit The next received signal is input from the unit 14 to the complementing unit 15, and the first and second storage units Correlation of the received signals from 3 and 14 is performed, and this complementary signal is converted into a complementary image signal by the image signal conversion unit 16 and is displayed on the display unit 17 next to the image signal S1 output from the first storage unit 13. The signal is displayed as the complementary image signal H1, then the received signal from the second storage unit 14 is converted by the image signal conversion unit 16 and displayed as the image signal S2, and the next received signal is further stored in the first storage unit. 13 and displayed as an image signal S2 by the image signal conversion unit 16, then a complementary image signal H2 from the complementing unit 15 is displayed, and then an image signal S3 from the second storage unit 14 is sequentially displayed. By repeating this, even if the displayed image has a large signal slope, the steps are smooth and the display becomes very easy to see.
[0008]
According to the present invention, the correlation between the received signal S1 stored in the first storage unit 13 and the received signal S2 stored in the second storage unit 14 is obtained by the complementing unit 15 and the first storage unit Next to the received signal S1 read from the memory 13, the complementary signal H1 from the complementary unit 15 is displayed, and after the complementary signal H1, the image signal S2 output from the second storage unit 14 is read and displayed. Even when the image signal changes rapidly, the displayed image signal is displayed so as to change smoothly.
[0009]
In the above embodiment, the number of complements is set to one and the number of readings is set to one. However, it is needless to say that the number of complements and the number of readings may be plural.
[0010]
【The invention's effect】
As described above, the fish finder of the present invention displays the signal from the first storage unit on the display unit, and then outputs the output signal from the first storage unit and the output signal from the second storage unit. The transmission and reception signals stored in the first storage unit and the second storage unit are read out by displaying the complemented signal by taking the correlation and then displaying the signal from the second storage unit on the display unit. And the input signal between the output signal from the first storage unit and the output signal from the second storage unit is input from the complement unit. There is an advantage that the step becomes smooth and the display becomes very visible.
[Brief description of the drawings]
FIG. 1 is a block diagram of a fish finder according to an embodiment of the present invention.
FIG. 2 is a diagram showing a part of a display displayed on a display unit of the display fish finder of FIG. 1;
FIG. 3 is a block diagram of a conventional fish finder.
FIG. 4 is a diagram showing a display screen of a display device of a conventional fish finder.
FIG. 5 is a diagram showing a defect of the display of FIG. 3;
[Explanation of symbols]
Reference Signs List 8 oscillation unit 9 ultrasonic transducer 10 reception unit 11 A / D conversion unit 12 gate unit 13 first storage unit 14 second storage unit 15 complement unit 16 image signal conversion unit 17 display unit

Claims (2)

An ultrasonic oscillator, an oscillator for applying an oscillation output to the ultrasonic oscillator, a receiver for amplifying a reflected wave received by the ultrasonic oscillator, and an A / D for converting the output of the receiver to digital A conversion unit; a first storage unit for storing an output of the A / D conversion unit; a second storage unit for storing a next received digital signal from the A / D conversion unit; A complementing unit that takes a correlation of signals read from the storage unit and complements the output signal, and outputs an output signal of the first storage unit, an output signal of the second storage unit, and an output signal of the complementation unit to an image signal. And a display unit for displaying the output of the image conversion unit. The output signal from the first storage unit, the output signal from the complementing unit, and the output signal from the second storage unit A fish finder, which sequentially outputs and displays the data. 2. The fish finder according to claim 1, wherein the complementing unit adds the output signal from the first storage unit and the output signal from the second storage unit and performs a calculation of １ ／.

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