阅读说明：本技术 一种耐高静水压力高频声学平面相控阵声基阵 (High hydrostatic pressure resistant high-frequency acoustic planar phased array acoustic array ) 是由 刘汉文 朱皓 蒋卓远 杨翠虹 丁锦鸣 于 2019-10-25 设计创作，主要内容包括：本发明公开一种耐高静水压力高频声学平面相控阵声基阵,属于深海声基阵技术领域。所述耐高静水压力高频声学平面相控阵声基阵中的有源器件的外表面通过柔性透声背衬包裹,在水下所述有源器件由于受到所述柔性透声背衬的包裹会呈现悬浮状态,能够抵消所述有源器件所受到的水压,从而保证所述有源器件不产生位移；所述有源器件底面设有轻质反声背衬,所述轻质反声背衬起到支撑和反射声波降低后辐射的作用；所述柔性透声背衬和所述轻质反声背衬均采用开放式灌注的方式加注,利用聚合物密度大而气泡轻向上跑的原理,有效地降低了材料中的缺陷,提高了声基阵背衬材料的结构强度,保证了声基阵在深海、高静水压力情况下的声学和结构性能。(The invention discloses a high hydrostatic pressure resistant high-frequency acoustic planar phased array acoustic array, and belongs to the technical field of deep sea acoustic arrays. The outer surface of an active device in the high hydrostatic pressure resistant high-frequency acoustic planar phased array acoustic array is wrapped by a flexible sound-transmitting backing, and the active device can be in a suspended state due to being wrapped by the flexible sound-transmitting backing under water, so that the water pressure borne by the active device can be offset, and the active device is ensured not to generate displacement; the bottom surface of the active device is provided with a light anti-sound back lining which plays a role in supporting and reflecting sound waves to reduce radiation; the flexible sound-transmitting backing lining and the light sound-reflecting backing lining are filled in an open type filling mode, the principle that the polymer is high in density and bubbles run upwards slightly is utilized, the defects in the material are effectively reduced, the structural strength of the acoustic matrix backing lining material is improved, and the acoustic and structural performance of the acoustic matrix under the conditions of deep sea and high hydrostatic pressure is guaranteed.)

1. The acoustic array is characterized by comprising a transducer shell (1), wherein an active device (2) is placed in the transducer shell (1);

the outer surface of the active device (2) is wrapped by a flexible sound-transmitting backing;

the bottom surface of the active device (2) is provided with a light anti-sound back lining (5), and the light anti-sound back lining (5) plays a role in supporting and reflecting sound waves to reduce radiation.

2. A high hydrostatic pressure and high frequency tolerant acoustic planar phased array acoustic array as claimed in claim 1 wherein the flexible acoustically transparent backing comprises a first flexible acoustically transparent backing block (3) and a second flexible acoustically transparent backing block (4), the first flexible acoustically transparent backing block (3) being located on the underside of the active device (2) and the second flexible acoustically transparent backing block (4) being wrapped around the top side and the perimeter of the active device (2).

3. The acoustic array according to claim 1, wherein the flexible acoustic backing is made of polyether polyurethane, and the flexible acoustic backing wraps the active device (2), so that pressure balance between the front and the back of the active device (2) can be maintained, and the performance of the acoustic array is ensured.

4. The acoustic planar phased array acoustic array with high hydrostatic pressure and high frequency resistance as claimed in claim 1, wherein the light acoustic backing (5) is made of glass beads and epoxy polymer, and the material has good supporting effect and can bear water pressure of more than one thousand meters under water.

5. The acoustic planar phased array acoustic array with high hydrostatic pressure and high frequency resistance as claimed in claim 1, wherein said flexible acoustically transparent backing and said lightweight acoustically opaque backing (5) are both filled by open-pour.

6. The high hydrostatic pressure and high frequency resistant acoustic planar phased array acoustic array according to claim 1, wherein after the high hydrostatic pressure and high frequency resistant acoustic planar phased array acoustic array is placed on a metal shell, epoxy glue is filled in a gap between the acoustic planar phased array acoustic array.

Technical Field

The invention relates to the technical field of deep sea acoustic arrays, in particular to a high hydrostatic pressure resistant high-frequency acoustic planar phased array acoustic array.

Background

The underwater accurate autonomous navigation capability is a key problem which needs to be solved urgently in the aspect of capability expansion and system construction of deep-sea defense deployment, large-range control and the like of a modern underwater vehicle. Compared with the acoustic array of the Doppler log in the traditional structure, the acoustic array of the acoustic planar phased array technology has the advantages of small volume, light weight and the like, and is widely applied in recent years. At present, the maximum application depth of the planar phased array is limited by an application platform to be not more than 500 m.

In order to expand the deep sea acoustic navigation capability under a new system, the development of an underwater unmanned platform in China is assisted, and the application requirement of developing an acoustic array of an acoustic phase-controlled Doppler log under the deep sea and large depth condition, which meets the requirement of deep sea (more than 7000 m depth) high-precision acoustic navigation, is more and more strong.

The acoustic planar phased array is a large-diameter, multi-element and high-density planar acoustic array, and the position precision of each element directly influences the phase precision of the element transmitting and receiving signals. Due to the reasons of materials, processes and the like, the consistency of the backing of the elements is difficult to meet the requirements, under the condition of high hydrostatic pressure, the stress of the radiation surface of the acoustic array is large, the consistency directly influences the stress consistency of each element, and further the performance of the acoustic array is changed, and the navigation precision is reduced.

The glass bead particles are mixed with epoxy, cured and formed to form a high-quality light anti-sound material which is generally used as a backing material of a transducer. Since it is in a liquid state before curing, it is conventionally poured into a cavity at the back of the transducer and then covered with the active device, but it is difficult to effectively control the time and method for covering the active device during curing, and air bubbles or air cavities are easily left. When the external pressure is high, the wall thickness of a material at the position where bubbles exist is thin, the material is easy to collapse and dent, the ceramic active device and the first layer of polyurethane on the upper part of the material can generate large displacement, and the displacement cannot be recovered after the pressure disappears, so that the local element position of the acoustic array sinks, the connecting line is broken, and the acoustic array is scrapped.

Disclosure of Invention

The invention aims to provide a high hydrostatic pressure and high frequency resistant acoustic planar phased array acoustic array to solve the problem that the existing acoustic planar phased array acoustic array has poor navigation accuracy and water pressure resistance.

In order to solve the technical problems, the invention provides a high hydrostatic pressure resistant high-frequency acoustic planar phased array acoustic array, which comprises a transducer shell, wherein an active device is placed in the transducer shell;

the outer surface of the active device is wrapped by a flexible acoustically transparent backing;

the bottom surface of the active device is provided with a light anti-sound back lining which plays a role in supporting and reflecting sound waves to reduce radiation.

Optionally, the flexible acoustically transparent backing includes a first flexible acoustically transparent backing block located on a bottom surface of the active device and a second flexible acoustically transparent backing block wrapped around a top surface of the active device.

Optionally, the material of flexible sound-transmitting backing is polyether polyurethane, flexible sound-transmitting backing parcel active device can maintain pressure balance around the active device, ensures the performance of resistant high hydrostatic pressure high frequency acoustic plane phased array sound array.

Optionally, the light anti-sound backing is made of glass beads and epoxy polymer, and the material has a good supporting effect and can bear water pressure of more than one thousand meters underwater.

Optionally, the flexible acoustically transparent backing and the lightweight acoustically opaque backing are both filled using an open pour.

Optionally, the high hydrostatic pressure resistant high-frequency acoustic planar phased array acoustic array is placed behind the metal shell, and epoxy glue is filled in a gap between the metal shell for sealing and water proofing.

The invention provides a high hydrostatic pressure and high frequency resistant acoustic planar phased array acoustic array, which comprises a transducer shell, wherein an active device is placed in the transducer shell; the outer surface of the active device is wrapped by the flexible sound-transmitting backing, and the active device can be in a suspended state due to being wrapped by the flexible sound-transmitting backing underwater, so that the water pressure borne by the active device can be offset, and the active device is ensured not to generate displacement; the bottom surface of the active device is provided with a light anti-sound back lining which plays a role in supporting and reflecting sound waves to reduce radiation; the flexible sound-transmitting backing lining and the light sound-reflecting backing lining are filled in an open type filling mode, the principle that the polymer is high in density and bubbles run upwards slightly is utilized, the defects in the material are effectively reduced, the structural strength of the acoustic matrix backing lining material is improved, and the acoustic and structural performance of the acoustic matrix under the conditions of deep sea and high hydrostatic pressure is guaranteed.

Drawings

Fig. 1 is a schematic structural diagram of a high hydrostatic pressure and high frequency resistant acoustic planar phased array acoustic array provided by the invention.

Detailed Description

The high hydrostatic pressure resistant high frequency acoustic planar phased array acoustic array proposed by the present invention is further described in detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

The invention provides a high hydrostatic pressure and high frequency resistant acoustic planar phased array acoustic array, as shown in figure 1, which comprises a transducer shell 1, wherein an active device 2 is arranged in the transducer shell 1; the outer surface of the active device 2 is wrapped by a flexible acoustically transparent backing; the bottom surface of the active device 2 is provided with a light anti-sound back lining 5, and the light anti-sound back lining 5 plays a role in supporting and reflecting sound waves and reducing radiation; the high hydrostatic pressure resistant high-frequency acoustic planar phased array acoustic array is placed behind the metal shell, and epoxy glue is filled in gaps between the metal shell and the acoustic phased array acoustic array.

Further, the flexible sound-transmitting backing comprises a first flexible sound-transmitting backing block 3 and a second flexible sound-transmitting backing block 4, the first flexible sound-transmitting backing block 3 is located on the bottom surface of the active device 2, the second flexible sound-transmitting backing block 4 wraps the top surface and the periphery of the active device 2, the flexible sound-transmitting backing is made of polyether polyurethane, and the polyether polyurethane is good in watertight characteristic due to the fact that the characteristic impedance (the product of the density and the sound velocity) of the polyether polyurethane is equivalent to that of water, and is generally used as sound-transmitting and watertight materials of underwater acoustic transducers. The pressure transmission is carried out through the material, and the front and back pressures of the active device 2 equivalent to an acoustic matrix are kept balanced. Under the deep water condition, the material has the same incompressible characteristic with water, and as long as no compressible space exists, the active material 2 is equivalently suspended in the water at the core of the acoustic array, so that the pressure resistance of the acoustic array is ensured.

Specifically, the light anti-sound backing 5 is made of glass beads and epoxy polymer, and has two functions, one of which has a supporting function of supporting the active device 2 when the external pressure is increased, and the other has an anti-sound function of reflecting the sound waves radiated backwards by the transducer back to the anti-sound layer after passing through the flexible sound-transmitting backing, so that the back radiation is reduced, and the material can meet the pressure of more than 10000 m. The light-weight anti-sound backing 5 manufactured by a special process method has the advantages of few defects and high reliability.

Specifically, the flexible sound-transmitting backing lining and the light sound-reflecting backing lining (5) are filled in an open filling mode, the principle that the polymer is high in density and bubbles slightly run upwards is utilized, the defects in the material are effectively reduced, the structural strength of the acoustic matrix backing lining material is improved, the acoustics and structural performance of the acoustic matrix under the conditions of deep sea and high hydrostatic pressure are guaranteed, after the mixture of the glass beads and the epoxy is solidified, a precision grinding machine is adopted for dry grinding, the defective part is removed, the defective part can be further removed after the mixture is ground to the designed size, and the mechanical performance of the part of the material is better.

The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.