阅读说明：本技术 一种水下真空角反射器 (Underwater vacuum corner reflector ) 是由 罗家骏 于 2019-08-29 设计创作，主要内容包括：本发明涉及一种水下真空角反射器,包括三块相互垂直连接的反射板,所述反射板内设有被抽真空的空腔。本发明能够有效提高反射器对声波的反射强度,并且尺寸小,重量轻,便于运输和使用,反射器的反射系数还可以调节。(The invention relates to an underwater vacuum corner reflector which comprises three reflecting plates which are mutually and vertically connected, wherein a vacuumed cavity is arranged in each reflecting plate. The invention can effectively improve the reflection intensity of the reflector to sound waves, and has small size, light weight, convenient transportation and use and adjustable reflection coefficient of the reflector.)

1. An underwater vacuum corner reflector comprising three reflecting plates (1) connected perpendicularly to each other, characterized in that: the reflecting plate (1) is internally provided with a vacuumed cavity (1 b).

2. An underwater vacuum corner reflector according to claim 1, wherein: the reflecting plate (1) is square, circular, triangular or polygonal.

3. An underwater vacuum corner reflector according to claim 1, wherein: the reflecting plate (1) comprises two outer plates (1a) which are oppositely arranged, the peripheries of the two outer plates (1a) are fixedly connected in a sealing mode, and a cavity (1b) is formed between the two outer plates (1 a).

4. An underwater vacuum corner reflector according to claim 3, wherein: and a valve (2) is fixedly arranged on one outer plate (1a) of the two outer plates (1a) to communicate the cavity (1b) with the outside.

5. An underwater vacuum corner reflector according to claim 4, wherein: the valve (2) is a one-way valve.

6. An underwater vacuum corner reflector according to claim 3, wherein: and a pressure gauge (3) for measuring the vacuum degree in the cavity (1b) is fixedly arranged on one outer plate (1a) of the two outer plates (1 a).

7. An underwater vacuum corner reflector according to claim 3, wherein: the outer plate (1a) is a stainless steel plate.

8. The underwater vacuum corner reflector according to any one of claims 1 to 6, wherein: and reinforcing ribs (4) are fixedly arranged in the cavity (1 b).

9. An underwater vacuum corner reflector according to claim 7, wherein: the reinforcing ribs (4) are long plate-shaped.

10. An underwater vacuum corner reflector according to claim 8, wherein: the reinforcing ribs (4) are provided with air holes (5).

Technical Field

the invention relates to the technical field of underwater acoustic engineering, in particular to an underwater vacuum corner reflector.

Background

The corner reflector is an electromagnetic wave reflecting device, is composed of three mutually perpendicular metal reflecting surfaces, and is commonly used for simulating the electromagnetic reflection characteristics of objects on the ground and in the air.

When the underwater target strength is measured, the target strength is also required to be calibrated by using a corner reflector as a standard reflector, and a sound bait with certain target strength and capable of effectively and truly simulating the echo of the underwater target is required. The underwater corner reflector is a measuring device meeting the technical requirements of the sound bait, is manufactured by referring to the basic principle of the electromagnetic wave corner reflector, can simulate the underwater sound reflection characteristics of a ship by utilizing the underwater corner reflector, and can also be used for marking underwater obstacles. The existing underwater corner reflector is generally made of a metal plate, and the thickness of the plate is usually determined according to the required acoustic reflection coefficient during manufacturing, wherein the larger the required acoustic reflection coefficient is, the larger the thickness of the plate needs to be correspondingly increased.

actually, the sound wave has a strong penetrating power, when the metal plate is directly used for manufacturing the corner reflector, a part of the sound wave transmits through the corner reflector, only a part of the sound wave is reflected, and the reflected wave is not strong enough. Thus, when such a corner reflector is used to simulate the underwater acoustic reflection characteristics of a ship, the size of the corner reflector is required to be larger than the size calculated theoretically. Therefore, the corresponding corner reflectors need to be manufactured for testing different sound reflection coefficients, and the size of a single corner reflector is larger, so that the manufacturing cost is high, and the transportation and the use are inconvenient.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides the underwater vacuum corner reflector which can effectively improve the reflection intensity of the reflector to sound waves, has small size and light weight, is convenient to transport and use, and can adjust the reflection coefficient of the reflector.

The technical scheme for solving the technical problems is as follows: an underwater vacuum corner reflector comprises three reflecting plates which are mutually vertically connected, and a vacuumed cavity is arranged in each reflecting plate.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, the reflecting plate is square, circular, triangular or polygonal.

Further, the reflecting plate comprises two outer plates which are oppositely arranged, the peripheries of the two outer plates are fixedly connected in a sealing mode, and a cavity is formed between the two outer plates.

Furthermore, a valve is fixedly arranged on one of the two outer plates to communicate the cavity with the outside.

Preferably, the valve is a one-way valve.

Further, a pressure gauge for measuring the vacuum degree in the cavity is fixedly arranged on one of the two outer plates.

Further, the outer plate is a stainless steel plate.

Furthermore, a reinforcing rib is fixedly arranged in the cavity.

Preferably, the reinforcing rib has a long plate shape.

Preferably, the reinforcing rib is provided with air holes.

The invention has the beneficial effects that: according to the invention, the vacuumized cavity is arranged in the reflecting plate, so that the characteristic that sound waves cannot be transmitted in vacuum is fully utilized, the reflectivity of the reflecting plate to incident sound waves is greatly improved, and the reflection intensity of the reflector to the sound waves is effectively improved; the invention improves the reflection intensity of the reflector to sound waves through the structural design, effectively reduces the size of the reflector, reduces the manufacturing cost of the reflector and is more convenient to transport and use; the invention can also realize the adjustment of the acoustic reflection coefficient of the reflector by adjusting the vacuum degree in the cavity, realize the adjustment of the performance of the reflector, meet the requirements of most application scenes by a single reflector and greatly reduce the test cost of the underwater sound intensity simulation test of the underwater target.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a reflection plate according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a rib of a reflection plate according to an embodiment of the present invention;

FIG. 4 is a graph of test results of comparative test underwater acoustic target strength in accordance with the present invention;

In the drawings, the components represented by the respective reference numerals are listed below:

1. The device comprises a reflecting plate, a 1a outer plate, a 1b cavity, a 2 valve, a 3 pressure gauge, a 4 reinforcing rib, a 5 air hole.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

As shown in figure 1, the underwater vacuum corner reflector designed by the invention comprises three reflecting plates 1 which are vertically connected with each other. As shown in fig. 2, each of the reflection plates 1 has a vacuum-evacuated cavity 1b therein. In order to ensure the use effect and the accuracy of the test, in the actual manufacturing process, it is necessary to ensure that the thickness of each reflection plate 1 is the same and the vacuum degree of the internal cavity 1b is the same. Generally, when the corner reflector is manufactured in water, three reflecting plates 1 need to be identical. The three reflecting plates 1 can be fixed by bonding or welding.

Preferably, the reflective plate 1 may have various shapes such as a square, a circle, a triangle, or a polygon.

As shown in fig. 2, the present invention also provides an improved solution, in which the reflective plate 1 includes two outer plates 1a oppositely disposed, the two outer plates 1a are fixedly connected along a periphery thereof in a sealing manner, and a cavity 1b is formed between the two outer plates 1 a.

During specific manufacturing, two identical outer plates 1a can be processed, arranged oppositely and parallelly, enough space is reserved, then the periphery edges are well surrounded by metal sealing strips, and the outer plates are welded and fixed, and no gap is reserved. The outer panel 1a is preferably made of a stainless steel plate.

The vacuumizing operation can be realized in the following mode, when the reflecting plate 1 is processed and manufactured, a vacuumizing hole or a vacuumizing channel can be reserved, after the main body is processed and manufactured, the cavity 1b is vacuumized through the reserved hole or channel by using vacuumizing equipment, and then the reserved hole or channel is sealed by using a sealing element (such as a sealing plug, a sealant and the like).

Preferably, a valve 2 is fixedly mounted on any one outer plate 1a of the two outer plates 1a to communicate the cavity 1b with the outside. The valve 2 can be used as a vacuumizing channel, and the valve 2 is closed after vacuumizing to finish sealing.

Preferably, the valve 2 is a one-way valve.

As shown in fig. 2, the present invention also provides an improved technical solution, in which a pressure gauge 3 for measuring the vacuum degree in the cavity 1b is fixedly installed on any one outer plate 1a of the two outer plates 1 a.

During specific manufacturing, an assembly hole can be formed in the outer plate 1a, a gauge head of the pressure gauge 3 is inserted into the assembly hole, and then the assembly hole is sealed and packaged.

As shown in fig. 2, the present invention also provides an improved technical solution, in which a reinforcing rib 4 is fixedly installed in the cavity 1 b.

In order to make the corner reflector suitable for deeper water depth measurement, a reinforcing rib 4 is fixedly installed in the cavity 1 b. This can improve the overall compressive strength of the reflection plate 1. 3-5 channels are preferably arranged on the reinforcing ribs 4.

Preferably, the reinforcing ribs 4 are long plate-shaped.

as shown in fig. 3, preferably, the reinforcing ribs 4 are provided with air holes. This facilitates the evacuation operation.