JPH0214011B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a longline monitoring device, and particularly to a longline fishing method such as tuna longline operation.

In tuna longline operations, a fishing boat arrives at the fishing ground and surveys the marine environment, then selects the desired sea area, and
Longline fishing gear is thrown into the sea from the hull of the ship in a line, and after a certain period of time, the fishing gear is retrieved onto the hull. In such longline operations, it is extremely important to constantly monitor the condition of the mainline on board and control the angle of the hauling line with the ship's hull in order to improve the efficiency of ship maneuvering for hauling operations and fishing efficiency. This is a task that requires skill. Generally, this type of work is performed by separate people who instruct the lifting line and operate the line hauler, and the integral relationship between these tasks greatly affects the efficiency of the lifting line work and fishing efficiency. .

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a longline monitoring device that realizes efficient boat maneuvering and rope handling while grasping the overall posture of the rope and monitoring the attached state of nearby fish.

That is, the longline monitoring device of the present invention includes a first detector 6 that detects the horizontal angle formed by the main line 28 being hauled from the hull 26 onto the ocean area with respect to the bow and stern line 30 of the hull. , a second detector 8 that uses sound waves as a detection medium to detect the trunk line, a single fish, a school of fish, etc. located close to the hull; A third detector 10 detects the state of the mainline outside the detection area of the second detector through radio waves, and stores each data detected by the first, second, and third detectors. A memory circuit (RAM 18, 20), an arithmetic circuit 14 that appropriately selects and processes the data stored in the memory circuit, and an output from this arithmetic circuit that displays the hull mark 34 representing the hull on the sea area display. , and a video display device 24 that displays a track display 36 representing the track of the ship as an image.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

FIG. 1 shows an embodiment of the longline monitoring device of the present invention.

The ship position measuring device 2 includes, for example, a Loran receiver and is provided to display the state of the longline in relation to the own ship's track, and its output generates a position signal of the own ship that changes from moment to moment. Gyro compass 4
is provided to know the absolute heading of own ship. The first detector 6 is a horizontal angle detector that detects the horizontal angle α° between the part of the main line near the hull of the ship during hoisting and the bow and stern line. 58-009454, as shown in Figure 3 of the attached drawing, can be adopted. In addition, the second and third detectors 8, 10
The method is to detect the configuration of the mainline, that is, its overall posture, depending on the distance from the ship's hull. That is, the detector 8 is composed of a high-resolution scanning sonar that uses sound waves as a detection medium, and its detection area is in the range of 10 to several hundred meters, and targets the rope formation in between, individual tuna, and schools of fish. Also, detector 1
0 consists of a radar that uses radio waves as a detection medium, and detects the state of the main rope outside the detection area of the detector 8. For example, it detects the reflection from a buoy on the main rope at a distance of 30 meters or more, and Understand the rope structure.
Detection data of the ship position measuring device 2, the gyro compass 4, and each of the detectors 6, 8, and 10 is sent to the arithmetic circuit 1 via the interface circuit 12.
Incorporated into 4. This arithmetic circuit 14 is composed of an arithmetic device such as a microcomputer or a minicomputer, and this arithmetic circuit 14 includes a read-only memory circuit (ROM) 16 and first and second readable and writable memory circuits (RAM). 18 and 20 are linked via a bidirectional bus. Memory circuit 1
6 stores a monitoring control program for main line conditions, etc. First and second memory circuits 18, 20
stores the changing detection data in order to display the detection data of the mainline and the trajectories of single tuna and schools of fish. The arithmetic circuit 14 stores each detection data that is taken in moment by moment into first and second storage circuits 18 and 20.
The stored detection data is appropriately selected and subjected to arithmetic processing, and then output. This calculation circuit 1
The output of 4 is input to the video display device 24 via the color conversion circuit 22. That is, color conversion circuit 2
2 converts the sonar information into red, for example, and supplies the signal to the video display device 24 in order to display the radar information and sonar information separately. The video display device 24 is composed of a display such as a CRT and a video display circuit, and displays the calculation results given from the calculation circuit 14 on the display.

The operation based on the above configuration will be explained with reference to FIGS. 2 and 3.

Figure 2 shows the actual rope formation. That is, the hull 26
The main line 28 thrown into the sea in the order of A, B, C, and D, for example, exhibits a meandering state as shown in the figure due to the current of the ocean tide. After a predetermined period of time, the ship returns to position A and begins hauling.
Here, the arrow 38 indicates the direction of the mainline 28 with respect to the fore-tail line 30, which has a horizontal angle α° with respect to the fore-tail line 30. In this way, main rope 28
Apart from the direction of arrow 38, the ropes are A, B, C,
It has a complex appearance as shown in D. In longline operations with such rope formations, it is necessary to understand the overall posture of the rope formation as well as the state of fish movement in order to improve the hauling operation and fishing efficiency.

Next, FIG. 3 shows a video display on the display of the video display device 24 of the longline monitoring device. That is, the hull mark 34 is displayed on the image of the display 32 based on the detection data of the ship position measuring device 2, and the track display 36 is displayed at the stern of the hull mark 34. An arrow 38 drawn out from the center of the hull mark 34 is an α° arrow mark indicating the direction of the mainline hauling line obtained by the first detector 6.
Further, a ₁ , a ₂ , and a ₃ indicate the reflected waves of the main rope displayed in red based on the detection information detected by the second detector 8. Since the second detector 8 uses sound waves as a detection medium, its detection range is limited to a range close to the hull 26. Therefore, by using the third detector 10, it is necessary to detect the rope formation of the main rope 28, and b ₁ to b _N are used to detect the reflected waves of the buoy on the main rope 28 by the third detector 10. This is what is displayed. That is, a ₁ which is the detection information of the second detector 8
~a ₃ and b ₁ which is the detection information of the third detector 10 ~
b By _N , the line configuration of the main line 28 is displayed together with the hull mark 34 on the display 32, and the overall attitude of the main line 28 can be grasped. Further, c ₁ to _{c 5} are fish schools, and these indicate red color detection information obtained by the second detector 8, which is a scanning sonar. d ₁ to _{d 7} indicate other ships, and these are detected by the detector 10 which is a radar.

Furthermore, p ₁ , p ₂ , and p ₃ are reflected waves from a single tuna and are displayed in red. That is, p ₁ represents information from the first reflection, p ₂ represents information from the second reflection, and p ₃ represents information from the third reflection. That is, in order to display such a single locus, the first and second memory circuits 18,
20 to move the circular coordinate mark P on the screen and capture the target single object. The coordinates of the reflected image within the captured range are stored in the second storage circuit 20 before moving from the first image to the second image, and when the second detected image is displayed, the coordinates are stored in the second storage circuit 20. By displaying the image or mark in the memory circuit 20 of No. 2 at the old position, the moving direction of the single unit can be known.
Furthermore, e ₁ and e ₂ indicate the reflected waves from a single tuna that is thought to be about to be caught.

With the above configuration, the second detector 8 that uses sound waves as a detection medium detects the state of the mainline near the hull, and the third detector 10 detects the state of the mainline far from the hull. By detecting this, it is possible to grasp the attitude of the entire mainline, and this can be determined using the hull mark 34.
Since the information can be displayed together with the information, it is possible to provide effective information in longline operations. Furthermore, in addition to the state of the main line 28, the moving direction of the individual tuna can also be displayed, making it possible to provide extremely useful information for operating the main line. Therefore, when a single reflected wave appears on the trajectory of the rope, and the state of several reflections remains unchanged, it is assumed that the single body is on the hook, and the line is pulled at a speed that prevents it from falling off the hook. In addition, the reflected wave from a single object is
If the fish approaches the trajectory of the line two or three times, it is assumed that the fish has found the bait and is chasing it, and the speed at which the main line is lifted is controlled so that it attracts the fish at the same speed as when dragging the line. The operation can be carried out by

As explained above, according to the present invention, it is possible to efficiently maneuver a ship by grasping the overall posture of the rope, and also to efficiently conduct steering and rope maneuvering while monitoring the state of the rope attached to the nearby hull. This can improve vessel maneuverability and fishing efficiency during rope hauling operations.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the longline monitoring device of the present invention, Fig. 2 is a diagram showing the actual rope configuration,
FIG. 3 is a diagram showing an image on the display device. 6...First detector, 8...Second detector, 1
0...Third detector, 14...Arithmetic circuit, 18...
...First memory circuit, 20...Second memory circuit, 2
4... Video display device, 26... Hull, 28... Main line, 30... Fore and stern line, 34... Hull mark, 3
6...Wake display.

Claims (1)

[Scope of Claims] 1. A first detector for detecting the horizontal angle that a mainline of a hauling line cast from a ship's hull onto the ocean area makes with respect to the bow and stern line of the ship's hull; a second detector that detects a main line, a single fish, a school of fish, etc. located close to the main line; and a second detector that applies radio waves to the detected object installed on the main line and transmits the reflected radio waves to the second detector. a third detector for detecting the state of the main line outside the detection area; a memory circuit for storing each data detected by the first, second and third detectors; and a memory circuit for storing data detected by the first, second and third detectors; an arithmetic circuit that appropriately selects and arithmetic-processes the data that has been displayed; and an image that uses the output of this arithmetic circuit to display a ship mark representing the ship on a sea area display as well as a track display representing the ship's track. A longline monitoring device comprising: a display device;