JP2976367B2 - Moving target - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large moving target simulating a submersible used as an acoustic target, which is used for tests on underwater acoustic detectors (soners) of ships and guidance devices for underwater vehicles. About.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a moving target used for testing a sonar of a surface ship and a guidance device for an underwater vehicle is provided behind an underwater vehicle 01, as shown in FIG. An acoustic unit 02 as an acoustic target for the body is provided, and a sonar transmitter 03 as an acoustic target for a sonar such as a surface ship is provided inside the sailing body 01. The boat is driven underwater by the propulsion device 05 installed in the vehicle.

[0003] In such a running test of the underwater vehicle using the moving target 06, the active sound of the underwater vehicle that is received by the acoustic unit 02 from the underwater vehicle performing the navigation test is generated. The sound is electrically processed by an acoustic device 04 provided inside, and a sound wave simulating a submarine or the like is returned from the acoustic unit 02 to perform a test. Further, in the sonar test of the surface ship, the sonar sound of the surface ship received by the sound unit 02 inside the marine vehicle 01 is processed by the sound device 04, and the sonar transmitter 03 outputs
The test is performed by returning a sound wave simulating a submarine or the like.

However, in recent years, underwater acoustic techniques such as underwater vehicles and submersibles have been improved, and moving targets for testing them are also compatible with the linearly towed acoustic unit 02 as shown in FIG. It is no longer possible, and there is a need for something corresponding to it.

That is, even the current underwater acoustic device has a function capable of discriminating the length and moving direction of a moving target, and the moving target also has the same length as the actual target object accordingly. It has become necessary to carry out a performance test of a surface ship and an underwater vehicle equipped with these underwater acoustic devices by mounting and sailing a towing array.

In the latest underwater acoustic technology, research is being conducted on capturing a target object in a plane by performing image processing or the like on a sound wave rebounding from the target object. Therefore, in order to test the performance of a ship equipped with an underwater acoustic device and an underwater vehicle, it is necessary to have not only a length but also a moving target that can capture the moving target in a plane and evaluate the performance. It is becoming.

For this purpose, as shown in FIG. 1, which is an embodiment of the present invention, a moving target having the same size as an actual target and having a size simulating a submerged ship is moved It is necessary to perform a running test of an underwater vehicle (not shown) that is towed by the body and equipped with an underwater acoustic device.

Although it is conceivable to use an actual submersible for testing on these moving targets 010, it is difficult because of safety problems. Although it is conceivable to use unmanned submersibles by towing them, it is not realistic because storage and operation of these submersibles require a large amount of cost.

[0009]

SUMMARY OF THE INVENTION In accordance with the improvement of underwater acoustic technology as described above, the present invention has confirmed the performance of surface ships and underwater vehicles that incorporate these underwater acoustic technologies into sonars and guidance devices. It is an object of the present invention to provide a large-sized moving target simulating a submarine, which can be used as an acoustic target for use in a cruising test.

[0010]

Therefore, the moving target of the present invention is as follows. (1) A reinforcing material such as Kevlar cord is covered with a rubber material or the like.
It was made of a flexible material having high strength, and provided therein an internal coating layer capable of adjusting the specific gravity of the whole and injecting a liquid for maintaining the shape under pressure. (2) It is made of a flexible material, is arranged on the outer surface of the inner coating layer, and reflects an almost same sound wave as a sound wave reflected from an actual submarine by an air layer injected into the inner coating layer. Above, a tube was provided to simulate an actual submarine. (3) An outer coating layer made of the same flexible material as the inner coating layer and provided with an outer coating layer for arranging and holding tubes on the outer surface of the inner coating layer so as to simulate an actual submarine.

[0011]

According to the above-mentioned means, the moving target of the present invention can: (1) With the liquid injected into the inner coating layer, the actual shape of the submarine can be maintained and the specific gravity of the whole moving target can be adjusted; It can sail underwater at depth. In addition, the adjustment of the specific gravity of the whole moving target and the formation of the shape can be performed only by adjusting the specific gravity of the liquid to be injected and the adjustment of the injection amount, so that the cost for the test can be reduced. (2) Due to the air injected into the tubes arranged on the outer surface of the inner coating layer, sound waves similar to the sound waves reflected from an actual submarine can be reflected by the underwater acoustic technique. As a result, the target object can simulate an actual submarine not only in a plane but also three-dimensionally. (3) With the outer coating layer, the tubes can be arranged and held on the outer surface of the inner coating layer, and the three-dimensional shape of an actual submarine can be formed.
Further, even during the cruising, the arrangement of the tubes can be maintained, and the three-dimensional shape of the actual submarine can be simulated faithfully. (4) Since the inner coating layer, the tube, and the outer coating layer are each made of a flexible material, handling in a folded state during storage or transport including transport to a test water area is possible. And easy handling, and light weight,
Operation costs can be reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a moving target according to the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an embodiment of the moving target of the present invention, and FIG. 2 is a cross-sectional view taken along the line AA in FIG. Although the towing type is shown in this embodiment, a propulsion device may be provided on a moving target so that the mobile target can be self-propelled.

In the figure, 1 is a moving target having a diameter of 10
m, the same size as an actual submersible with a length of 50 m, and formed in an outer shape similar to a teardrop. Reference numeral 2 denotes a tow hook, which is provided on an outer surface of an outer coating layer, which will be described later, at a position where the posture of the moving target 1 becomes horizontal when the moving target 1 is towed and sails underwater, and connects a towing rope 5. I do. 3
Are stable fins provided at the rear end of the moving target 1 for preventing the moving target 1 traveling underwater from rolling and stabilizing the traveling direction. A surface ship 4 tow the moving target 1 can tow the moving target 1 at a towing depth determined by the specific gravity of the moving target 1 and the length of the tow rope 5 at the same speed as the actual speed of the submersible.

Next, the configuration of the moving target 1 will be described with reference to FIG. The moving target 1 is a pressurized air layer 11 for simulating the shape of a real submersible underwater acoustically on the outside, and also adjusts the specific gravity of the whole moving target 1 on the inside and moves the moving target 1 to the actual dive. It is composed of a pressurized liquid layer 12 filled with a liquid having a high specific gravity under pressure to maintain the shape of the ship. The pressurized air layer 11 is formed in an outer shape with a diameter of 10 m by arranging tubes 13 having a diameter described later on the circumference.

Here, the width of the pressurized air layer 11 is set to 30 or more according to the equation 1, assuming that the width of a sound wave (used sound wave) used for a sonar of a surface ship or a guidance device for an underwater vehicle is not less than 1/2.
cm.

[0016]

(Equation 1)

By setting the pressurized air layer 11 to 30 cm, the buoyancy F generated in the pressurized air layer 11 can be calculated by the following equation (2).
Becomes 360 tonf.

[0018]

(Equation 2)

However, in Formula 2, the compressed air layer 11 having a width of 30 cm is formed by arranging tubes 13 having a diameter of 30 cm, and 100 tubes 13 are formed to form the outer periphery of the moving target 1 having a diameter of 10 m. Are arranged on the circumference.

The pressurized liquid layer 12 is formed by the pressurized air layer 1.
1 to cancel the buoyancy of 360 tonf and make the moving target 1 run underwater, the specific gravity of seawater (1.02
5) A liquid having a larger specific gravity was filled under pressure.
As the liquid having a high specific gravity, a salt water having a high concentration was used. This has the advantage that after the test, the filling liquid can be dumped into the sea, and the filling liquid at the time of injection can be made using the surrounding seawater.

The pressurized liquid layer 12 is a flexible inner coating layer 14 in which a reinforcing material such as Kevlar cord is coated with a rubber material or the like.
Is formed by injecting the above-mentioned high-concentration salt water. By arranging the tubes 13 on the outer peripheral surface of the inner coating layer 14 on the circumference, the moving target 1 can be formed into a shape that generates the same underwater sound as an actual submarine. Further, by injecting salt water into the flexible inner coating layer 14 under pressure, the shape previously formed on the inner coating layer 14 can be maintained.

Further, while the moving target 1 is towed, the tube 1
3. An outer coating layer made of the same material as the inner coating layer 14 on the outer peripheral surface of the arranged tubes 13 in order to prevent the tubes 13 from peeling or deforming from the inner coating layer 14 due to the fluid force acting on the outer surface. 15 to form the outer surface of the moving target 1.

In this embodiment, the air and the liquid inside the moving target 1 are transported in a state where both are removed, and the air and the liquid inside the moving target 1 are used at sea when used. Injection can be performed to form a teardrop-shaped diving towed body having a diameter of about 10 m and a length of about 50 m.

Next, the towing rope 5 is connected to the towing hook 2 of the moving target 1, and the towing rope 5 is pulled by the surface ship 4, whereby towing is performed. The moving target 1 emits active sound from another surface ship or underwater vehicle equipped with an underwater acoustic device, so that the moving target 1 is reflected from the surface of the actual submarine by an air layer on the surface. A similar sound wave can be reflected, and using this,
A performance test can be carried out by performing a running test on a surface ship or underwater vehicle with an underwater acoustic device. After use, the inside air and liquid are drained and stored again in an empty state.

[0025]

As described above, according to the moving target of the present invention, according to the configuration shown in the claims, (1) the three-dimensional shape of the actual submarine can be maintained,
The specific gravity of the entire moving target can be adjusted, and the moving target can travel in water at a predetermined depth. In addition, the adjustment of the specific gravity of the entire moving target and the formation of the shape can be performed only by adjusting the specific gravity and the injection amount of the liquid to be injected, and are easy. Therefore, the cost required for the test can be reduced. (2) Due to underwater acoustic technology, sound waves similar to those reflected from an actual submersible can be reflected. This allows you to
During sailing, it can be used not only on a plane but also three-dimensionally as a target object that simulates an actual submarine,
It will be possible to evaluate state-of-the-art surface ship sonars and underwater vehicles. (3) During storage or during transportation, including during transportation to the test water area,
It can be handled in a folded state, handling is easy, and the weight can be reduced, and the operating cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of a moving target according to the present invention during towing.

FIG. 2 is a cross-sectional view showing the internal structure of the embodiment shown in FIG.

FIG. 3 is a side view showing a conventional moving target.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 moving target 2 towing hook 3 stable fin 4 surface ship 5 towing rope 11 pressurized air layer 12 pressurized liquid layer 13 tube 14 inner coating layer 15 outer coating layer

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Shoji Nakajima 1-1, Akunouramachi, Nagasaki City Inside Nagasaki Shipyard, Mitsubishi Heavy Industries, Ltd. Field (Int.Cl. ⁶ , DB name) F41J 9/04-9/06 F42B 12/72 F42B 19/00-19/46

Claims (1)

(57) [Claims] 1. A large moving target simulating a submersible used as an underwater acoustic detector of a ship or an acoustic target of a guidance device for an underwater vehicle, the specific gravity of which is adjusted, and a liquid that retains its shape is injected. An inner coating layer, a tube arranged on the outer surface of the inner coating layer to form an air layer that reflects a submarine-sized sound wave, and covering the outer periphery of the tube to hold the tube on the outer surface of the inner coating layer A moving target comprising an outer covering layer, each of which is formed of a flexible material.