JPS63187178A - Display device for object on or in water - Google Patents

Abstract

PURPOSE:To conduct operation with high efficiency, by making a sonar display unit and a radar display unit display an object in the water and an object on the water simultaneously or either of these objects. CONSTITUTION:In a sonar transmitting-receiving unit 50 in a sonar transmitter- receiver 24, a reception signal returning from an underwater object such as a school of fish is subjected to changing-over processing for every distance and bearing around a boat itself and taken out as polar coordinate signals (r1, theta1). In a radar transmitting-receiving apparatus 30, too, on the other hand, an object on the water, such as a consort boat, can be displayed on a display unit 36a by a substantially identical operation with the one in an apparatus 20. In order to display an image of the consort boat or the like obtained by the apparatus 30, in superposition on a sonar display unit 26a, output signals (X2, Y2) of a radar transmitter-receiver 34 are transferred to a buffer memory circuit 40a to be processed thereby.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a surface/underwater object display device, and more particularly, to a sonar transmitting/receiving device for detecting underwater objects such as a school of fish, a so-called color sonar, which displays underwater object position information related to a school of fish, etc. By combining and displaying on-the-water object information related to ships, especially fishing boats, etc. obtained from radar transceivers on the same screen of a display device such as a CRT, it is possible to determine the positional relationship between schools of fish and consort ships of the same fishing fleet. The present invention relates to an above-water/underwater object display device that enables highly efficient operations by quickly grasping objects, and as a result, further improves the amount of fish caught.

2. Description of the Related Art Underwater acoustic equipment has been widely used to confirm objects existing underwater. A suitable example is a sonar device. A sonar device emits sound waves, especially ultrasonic pulses, over a wide range of water from a transducer consisting of a large number of transducers arranged in a cylindrical or circular arc shape, and also emits a directional receiver by combining these multiple transducers. This is an underwater detection device that forms a wave beam and rotates this receiving beam by sequentially switching the combination of vibrators to receive reflected waves returning from each direction and display them on a cathode ray tube. That is, focusing on the fact that the intensity of reflected echoes from underwater objects such as schools of fish is generally proportional to the size of the schools of fish, the amplitude of the signal wave related to the reflected echoes is calculated by CRT.
The presence of schools of fish, etc. is confirmed using color displays such as

By the way, purse seine fishing has been well known since ancient times as a fishing method for surface migratory fish such as sardines, mackerel, and tuna. In other words, this fishing method is a fishing method in which several ships form a fleet by dividing their roles into steel ships, exploration ships, transport ships, etc., and work together to catch fish. In this fishing method, it is not uncommon for the fishing time from the time the net is cast to the time the net is dragged to be several hours long. Therefore, it is necessary to accurately and quickly detect schools of fish, confirm the positions of consort ships, etc.

Therefore, conventional methods have been used in which the fisheries chief determines the optimal conditions for starting net casting while using the sonar device to capture and detect schools of fish, while visually confirming the position of companion ships from the porthole, and accurately determining the timing to cast the net. has been adopted.

However, with this method, when operating at night or on a foggy day, it becomes extremely difficult to decipher and capture the positions of companion vessels, and there is a risk of losing the opportunity to cast nets to properly catch schools of fish. .

Therefore, in order to solve this problem, as shown in Fig. 1, a radar is installed along with a sonar device to detect objects on the water, that is, consort ships, and the position of the consort ship 2 is detected by radar as shown in Fig. 1. There is also a method of determining the optimum timing for casting the net by checking the fish school positions 6a and 6b on the display 8 of the sonar device as shown in FIG. 1A while checking the display 4. However, in this method, there are disadvantages such as the display magnification of the objects displayed on each display or the relative positional relationship of the display positions. The fear of losing time has not yet been resolved.

Moreover, this method of installing two displays has various problems such as an increase in initial cost and an increase in installation space.

The present invention has been made to overcome all of the above-mentioned disadvantages, and in order to detect schools of fish and accurately and quickly determine the optimal time to cast a net, the present invention uses, for example, the output information of radar and sonar devices. , the coordinates of the radar output information are converted and the information on underwater objects related to schools of fish, etc., and the information on water objects related to ships, especially consort ships, etc. obtained from the radar are displayed on the display of the sonar device at the same time and in the same ratio. By combining and displaying the results, we aim to further optimize the timing of net casting, and as a result,
On-water fishing that makes it possible to further improve fishing yields
The purpose of the present invention is to provide an underwater object display device.

In order to achieve the above object, the present invention provides a sonar transmitting/receiving device for detecting underwater objects such as schools of fish, a radar transmitting/receiving device for detecting waterborne objects such as ships, and a display of the output signal of the radar transmitting/receiving device on the sonar transmitting/receiving device. A sonar display device and/or a radar display device. The underwater object and the above-water object are configured to be displayed simultaneously or either one of them.

Next, preferred embodiments of the above-water/underwater object display device according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a basic block diagram of the above-water/underwater object display device according to the present invention, and reference numeral 10 indicates the above-water/underwater object display device according to the present invention.

The above water/underwater object display device 10 basically includes a sonar transmitting/receiving device 20, a radar transmitting/receiving device 30, and a coordinate converter 4.
It consists of 0. Here, the sonar transceiver 20 is composed of a sonar transceiver 22), a sonar transceiver 24, and a display 26, and ultrasonic waves are emitted from the sonar transceiver 22 into the water by an ultrasonic pulse drive signal from the sonar transceiver 24. The reflected wave is again displayed on the display 26 via the sonar transceiver 22 and the sonar transceiver 24.

On the other hand, the radar transmitting/receiving device 30 is composed of a radar antenna 32) and a radar transmitting/receiving device 34. Microwaves generated from the radar transmitting/receiving device 34 are radiated from the radar antenna 32, and the reflected signal is taken in again from the radar antenna 32, and the radar transmitting/receiving The information is input to the machine 34. The output signal of the radar transceiver 34 is converted by a coordinate converter 40 into coordinates corresponding to the specifications of the display 26 in the sonar transceiver 20, and as a result, the sonar transceiver 2 is displayed on the sonar display 26.
It is possible to simultaneously display the information related to the fish schools obtained in 0 and the information related to ships, especially consort ships, obtained by the radar transmitting/receiving device 30. Note that the radar display 36 shown by a broken line in FIG. 2 can also be provided as an output device of the radar transceiver 34 if necessary.

FIG. 3 is a more detailed block diagram of the above-water/underwater object display device according to the present invention. In FIG. 3, the same components as those shown in FIG. 2 are given the same reference numerals, and detailed explanation thereof will be omitted.

As can be easily understood from FIG. 3, the sonar transmitter/receiver 24 includes a sonar transmitter/receiver section 5o, a scan converter section 5
2 and a memory circuit section 54, and the reflected signal related to an underwater object from the sonar transceiver 22 is transmitted via the sonar transceiver section 50, a scan converter 52) and a memory circuit section 54 to a color display using a Rusk scan method, for example. 2
6a will be operated manually.

On the other hand, the radar transceiver 34 includes a radar transceiver section 6o, a scan converter section 62, and a memory circuit section 64. The signal is input to the Rusk scan type color display 26a through the buffer memory circuit 40a, which is one specifying means of the coordinate converter 40, through the unit 64. Reference numeral 36a is also a color display using the Rusk scan method, and is provided as necessary to display waterborne object information related to the radar transmitting/receiving device 30.

The underwater/underwater object display device according to the present invention is basically constructed as described above, and its operation and effects will be explained next.

First, a pulse signal generated by a signal generator (not shown) in the sonar transmitting/receiving section 50 is transmitted to the entire surface of the water as an ultrasonic signal via the sonar transducer 22, which is composed of a large number of cylindrical transducers, for example. radiated in the direction. Next, the reflected waves returning from underwater objects such as schools of fish are received by the sonar transducer 22 and guided to the sonar transceiver section 50 in the sonar transceiver 24. The received signal returning from the object is at a distance (
r), signal switching processing is performed for each direction (θ), and is extracted as a polar coordinate signal (rI, θI). This signal is then introduced into the scan converter section 52, where it undergoes coordinate transformation from polar coordinates (r, θ) to orthogonal coordinates (x, y).
The received signal is stored at the address position corresponding to the X and Y coordinates of the orthogonal coordinates. in this case,
The output of the memory circuit section 54 is connected to, for example, a display device 26a using a Rusk scan method such as a color monitor.
Each time the display 26a is swept, a received signal related to a school of fish stored in the memory circuit section 54 is read out at an address position corresponding to the X and Y coordinates of the sweep, and the display 26a is read out.
6a.

Through the above procedure, the position (distance/direction) of underwater objects such as schools of fish with the own ship at the center is displayed on the rusk scan display 26.
It is displayed on a.

On the other hand, in the radar transmitting/receiving device 3o, the display 3
Water objects such as consort ships can be displayed on 6a.

That is, microwaves generated by a signal generator (not shown) in the radar transmitting/receiving section 60 radiate a directional signal rotating 360 degrees in a horizontal plane from the radar antenna 32 on the ship, and the reflected signal is detected by the radar transmitting/receiving section 60. , polar coordinate signal (
rz, θ2) is derived to the scan converter section 62. The scan converter section 62 converts the polar coordinate signal (r2
) θ2) into a rectangular coordinate signal (Xi, Yz), and output it to the memory circuit section 64 to obtain this rectangular coordinate signal (xi, Yz).
, Yz) are stored in the memory circuit section 64.

Therefore, next, in order to superimpose and display images related to consort ships etc. obtained by the radar transceiver 30 on the sonar display 26a, the output signal of the radar transceiver 34, that is, the orthogonal coordinate signal (xz , Y!) to the buffer memory circuit 40a.

In this case, the buffer memory circuit 40a stores the orthogonal coordinates within the same range as the detection range (search display range) selected by the sonar display 26a, among the orthogonal coordinate signals (Xi, Yz) related to the radar transmitting/receiving device 30. A signal is sent to and displayed on the sonar display 26a for each XSY coordinate that corresponds to the sweep of the sonar display 26a. In this case, if necessary, it is possible to correct the azimuth information in the buffer memory circuit 40a so that the display reference azimuth of the sonar transmitting/receiving device 20, for example, the heading of the ship coincides with the heading of the radar transmitting/receiving device 30. It is.

With this method, radar images can be displayed superimposed on sonar images on one display. In addition, at this time,
The image of the target obtained from the radar device can be displayed in a specific color other than the sonar image so that it can be easily distinguished from the sonar image at a glance.

FIG. 4 is an example of superimposing sonar images and radar images obtained by the above-water/underwater object display device 10 according to the present invention,
Figure 4 a shows own ship A1 consort ships Ba, Bb, Bc and school of fish Ca.
, Cb and the acoustic beam range 100. FIG. Now, a wake 104 extends in the opposite direction to the bow direction 102 of own ship A, and schools of fish Ca and Cb are moving in the bow direction 102.
It is assumed that they are located at azimuth positions of θ1° and θ2° with respect to 02, respectively. In this case, the image on the display 26a is displayed as shown in FIG. Therefore, the fishery chief can select the optimal timing for casting nets while understanding the displayed image, that is, the position of the school of fish, its size, and the position of consort ships, at a glance, taking into account his own extensive experience.

As another embodiment of the present invention, contrary to the above, if it is desired to display a sonar image on the radar display 36a, the signal branched from the output section of the sonar transceiver 24 may be input to the buffer memory circuit 40a. In that case, it is possible to display each other's images at the same ratio and position by matching the search display range and azimuth standards with the standards of the radar display 36a.

Furthermore, as another embodiment, for example, all the information obtained from the sonar transmitting/receiving device 20 or the radar transmitting/receiving device 30 is inputted and stored in the buffer memory circuit 40a, and the required area is appropriately set when reading out according to the sweep of the display. It is possible to configure the system so that only the information is read out, or it is also possible to configure the system so that only the area that matches the range of the display device to be displayed in advance is stored.

Furthermore, as another embodiment, it is also possible to change the configuration so that the distance/azimuth correction processing is also performed at the same time when the sonar signal or radar signal is written into the buffer memory circuit 40a.

As described above, according to the present invention, in order to detect schools of fish and accurately and quickly determine the optimal time to cast a net, the output information of a radar receiving device or a sonar device is coordinate-transformed, and, for example, the output information of a sonar device is displayed on the By simultaneously displaying on the same screen underwater object information related to schools of fish, etc. and waterborne object information related to ships, especially consort ships, etc. obtained from radar, it is possible to achieve high net casting without losing opportunities to cast nets. A water/underwater object display device is obtained that enables efficient operations and, as a result, further improves the catch.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments, and various improvements and changes in design can be made without departing from the gist of the present invention. Of course.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a display example of a conventional display device, FIG. 2 is a basic block diagram of the above-water/underwater object display device according to the present invention, and FIG. 3 is a detailed diagram of the above-water/underwater object display device according to the present invention. Block diagram, Figure 4a is a detailed view of an example of use of the above-water/underwater object display device according to the present invention, and Fig. 4 is an explanatory diagram of an example of display on the display of the above-water/underwater object display device. be. 10...Water/underwater object display device 20...Sonar transmitting/receiving device 22...Sonar transceiver 24...Sonar transmitting/receiving device 26.26a...Display device 30...Radar transmitting/receiving device 34...・Radar transceiver 36.36a...Display device 40...Coordinate converter 40a...Buffer memory circuit FIG, 1 (a) (b) Bc bo Bc

Claims (2)

[Claims] (1) A sonar transmitting/receiving device that detects underwater objects such as schools of fish, a radar transmitting/receiving device that detects waterborne objects such as ships, and coordinates that transform the output signals of the radar transmitting/receiving device and introduce them into the display of the sonar transmitting/receiving device. A converter and/or a coordinate converter that converts the output signal of the sonar transmitting/receiving device into the display of the radar transmitting/receiving device and introduces the coordinate converter, and simultaneously displays the underwater object and the surface object on the sonar display and/or radar display. An above-water/underwater object display device characterized in that it is configured to display either one of the above and the above. (2) A water/underwater object display device according to claim 1, in which the water object is displayed in a specific color other than the underwater object display color.