JP2980798B2 - Sonar display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sonar device for detecting a school of fish, which facilitates discrimination between an interference image from another ship sonar device and a fish school image.

[0002]

2. Description of the Related Art A conventional sonar display device displays only a sonar detection image or, in addition to this, displays only information relating to the own ship such as its own ship position and ship speed direction. FIG.
FIG. 2 is a block diagram showing an example of a configuration of a conventional sonar device. The ultrasonic wave transmitted from the transmitter / receiver 1 and reflected on a target such as a school of fish returns to the transmitter / receiver 1 again, is received and converted into a reception signal, passes through a reception system in the transmitter / receiver 2, and passes through the sonar signal. The processing unit 3 performs various signal processing.
It also includes some interference removal processing.

[0003] The sonar signal that has been subjected to the signal processing is converted into a video signal by an image processing section 12 and sent to a display 8 for image display. In FIG. 3, the display relation of the information on the own ship is omitted.

[0004]

As described above, in the conventional apparatus, the sonar signal processing unit 3 has performed the interference removal processing, but the interference due to the direct wave from the sonar apparatus of another ship is completely removed. It does not appear on the display.

In general, interference images between sonar devices appear as a ring around the center of the image when the transmission periods are equal, and become spiral and more radial as the periods shift. However, depending on the case, as shown in the image 10 of FIG. 4, the image may be confused with the fish school image 11 in the radial direction (dotted line direction) of the image. In the case of such interference, mounting vessels interference sonar in a direction (dashed line direction) aligned interference image that is present are known from the past knowledge.

However, merely observing the image on the display does not make it clear whether it is interference from another sonar device or an image of a school of fish. In such a case, is there any other ship in the direction in which the suspicious image appears? There is a problem in that a person has to confirm whether or not it is on board, visually, using a video image from a radar device, or using data from a plotter device.

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, an object of the present invention is to provide a sonar display device on a display screen corresponding to another ship position based on other ship position data from an external navigation device. The other ship's mark indicating the presence of another ship at the position is displayed together with the sonar detection image, and when an image that is difficult to distinguish from interference or fish school image appears, it is determined whether there is another ship in the direction of the image. It is an object of the present invention to provide a sonar display device in which it is possible to determine at a glance whether or not interference occurs quickly.

[0008]

The present invention has the following means in order to achieve the above object. That is, the sonar display device of the present invention is a sonar display device for detecting a school of fish mounted on a ship. The sonar display device receives another ship position data from an external navigation device, and processes the data format of the own device. A data receiving unit that converts the data into a format and outputs the data;
A calculating unit for calculating and outputting the azimuth and distance of the other ship from the own ship based on the other ship position data from the data receiving unit;
A character generator for receiving a bearing signal and a distance signal from the calculation unit and generating a signal indicating a different ship mark indicating that the ship is another ship at a position corresponding to the bearing and the distance; and a different ship from the character generator. a combining circuit for superimposing synthesizing the mark signal and the sonar detection image signal; receiving the composite signal and a display unit for displaying the other ships mark and sonar sensed image; comprises a straight sending another ship sonar
Pseudo-wave caused by the tangent wave
A sonar display device for suppressing display of a fish school image .

The external navigation device may be any device that can obtain position information of another ship. For example, a radar device mounted on a ship, a plotter device, or a device for receiving position information radio of a ship existing in a specific range of sea area.

[0010]

The operation of the sonar display device of the present invention having the above-mentioned structure will be described below. Since there are various types of external navigation devices that provide other ship position data as described above, the format of the output position data differs depending on the type of the device, so this is converted into a format that can be processed by this device. There is a need. The data receiving unit performs this format conversion. The arithmetic unit receives the other ship position data from the data receiving unit, and calculates and outputs the azimuth of the other ship as viewed from the own ship and the distance to the other ship.

The character generation unit receives the direction signal and the distance signal from the calculation unit, generates a signal indicating another ship mark indicating that it is another ship at a position corresponding to the direction and distance, and sends the signal to the synthesizing circuit. send.

In the synthesizing circuit, the sonar detection image signal processed by the receiving system and the other ship's mark signal are superimposed and synthesized and sent to the display, so that the display screen of the display together with the fish school image and the interference image is displayed on the screen. The other ship mark is displayed at a position corresponding to the above other ship position.

In this way, when an image in which it is difficult to determine whether the image is a fish school image or an interference image appears on the screen, if there is another ship's mark on the extension of that direction, there is a high possibility of interference, and the other ship is likely Without the mark, it can be quickly and reliably determined that the image must be a fish school image.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of the sonar display device of the present invention. Note that the same components as those in the configuration in FIG. 3 are denoted by the same reference numerals, and description thereof is omitted. The data receiving unit 4 receives position data of another ship existing around the own ship from an external navigation device, for example, a mounted radar device or plotter device or a ship position information receiving device. Then, the format of the received data is converted into a processing format in the own device, and then sent to the arithmetic unit 5.

The calculation unit 5 calculates the bearing of the other ship and the distance to the other ship from the position of the own ship from the received data, and sends the signal to the character generation unit 6. The character generator 6 sends a signal to the image processor 7 to display another ship mark indicating that the ship is another ship on an image position corresponding to the position indicated by the azimuth signal and the distance signal from the calculator 5.

In the image processing section 7, the sonar signal processing section 3
After converting the sonar signals subjected to various kinds of signal processing into video signals, the other ship mark signals from the character generator 6 are synthesized by an internal synthesizing circuit and sent to the display 8. In this way, the other ship mark is displayed at the position of the other ship together with the sonar detection image on the screen of the display.

FIG. 2 is a diagram showing a sonar image display example in the sonar display device of the present invention. FIG. 2A shows a case where the other ship mark is out of the sonar image display range,
(B) shows a case where the range is within the range. In each of the figures, images 10 are now appearing on the screen in a northwest radius, and it is difficult to determine whether the image is a fish school image or interference from another ship. Since the mark is displayed, it is determined that there is interference, and if there is no other ship mark, it is determined that the image is a fish school image.

[0018]

As described above, the sonar display device of the present invention displays the sonar detection image together with the other ship mark indicating the position of the other ship. When an interference image that is difficult to distinguish from a fish school image appears in a dotted manner, there is an advantage that it is possible to immediately determine whether the image is an interference image or a fish school image depending on whether or not another ship mark exists in the direction in which the images are arranged.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a sonar display device of the present invention.

FIG. 2 is a diagram illustrating an image display example of the sonar display device of the present invention.

FIG. 3 is a block diagram showing a configuration of a conventional sonar device.

FIG. 4 is a diagram showing a conventional sonar image display example in which a fish school image and an image in which it is difficult to determine whether it is a fish school image or an interference image are displayed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transceiver 2 Transceiver 3 Sonar signal processing part 4 Data receiving part 5 Operation part 6 Character generation part 7 Image processing part 8 Display 9 Other ship mark 10 Video 11 Fish school video 12 Image processing

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G01S 7/52-7/64 G01S 15/00-15/96

Claims (2)

(57) [Claims] 1. A sonar display device for detecting a school of fish mounted on a ship, comprising: receiving data of another ship position from an external navigation device, converting the format of the data into a processing format of the own device, and outputting the converted data. A calculating unit for calculating and outputting the azimuth and distance of the other ship from the own ship based on the other ship position data from the data receiving unit; receiving the azimuth signal and the distance signal from the calculating unit, A character generation unit for generating a signal indicating a different ship mark indicating that the ship is another ship at a position corresponding to the distance;
A combining circuit for superimposing combining the other ships mark signal and sonar detection image signal from the character generator; receiving the composite signal and a display unit for displaying the other ships mark and sonar sensed image; equipped with, other vessels For direct waves transmitted by sonar devices
Simulated fish schooling that occurs in the other ship's heading
A sonar display device for suppressing display of an image . 2. The external navigation device is a radar device, a plotter device or a ship position information wireless receiving device.
A sonar display device as described.