A type of deep-sea sonar

Abstract

This invention relates to a deep-sea sonar, comprising a shell, a transducer module, and an elastic module. The shell has a first mounting hole and a second mounting hole on its sidewall. The transducer module is mounted at the first mounting hole, and the elastic module is mounted at the second mounting hole. The shell, the transducer module, and the elastic module form a pressure balance cavity filled with a compressible fluid medium. The elastic module includes a first elastic layer, a rope net, and a second elastic layer. The rope net is adhered between the first and second elastic layers, and a portion of the first and second elastic layers fills the mesh of the rope net. The rope net includes a plurality of tensile ropes, the elongation of which is less than the elongation of the first and second elastic layers.

Description

Technical Field

[0001] This invention relates to the field of sonar, and in particular to a deep-sea sonar. Background Technology

[0002] Deep-sea sonar is an important device for surveying information such as deep-sea mineral deposits and biological distribution. It mainly consists of three parts: a shell, a transmitting transducer module, and a receiving transducer module, which are mounted on the shell. The transmitting transducer module is used to transmit sound wave signals in the deep sea, while the receiving transducer module is used to receive reflected sound wave signals, thereby obtaining deep-sea information.

[0003] Taking the receiving transducer module as an example, it is usually a planar structure. Due to the high pressure in deep sea water, it is often difficult to balance the pressure inside and outside the shell. This makes the planar receiving transducer module very easy to deform, resulting in a decrease in the receiving accuracy of the receiving transducer module for receiving sound wave signals. Summary of the Invention

[0004] Therefore, it is necessary to provide a deep-sea sonar to address the problem that transducer modules are prone to deformation in the deep sea.

[0005] A deep-sea sonar includes a shell, a transducer module, and an elastic module. The shell has a first mounting hole and a second mounting hole on its side wall. The transducer module is mounted at the first mounting hole, and the elastic module is mounted at the second mounting hole. The shell, the transducer module, and the elastic module form a pressure balance cavity, which is filled with a compressible fluid medium.

[0006] The elastic module includes a first elastic layer, a rope net, and a second elastic layer. The rope net is adhered between the first elastic layer and the second elastic layer, and a portion of the first elastic layer and the second elastic layer fills the mesh of the rope net. The rope net includes a plurality of tensile ropes, and the elongation of the tensile ropes is less than the elongation of the first elastic layer and the second elastic layer.

[0007] In one embodiment, a potting material is disposed between the transducer module and the edge of the first mounting hole.

[0008] In one embodiment, the compressible fluid medium is industrial white oil, silicone oil, or transformer oil, the first elastic layer and the second elastic layer are made of neoprene rubber, and the rope net is made of polyamide.

[0009] In one embodiment, the thickness of the first elastic layer and the second elastic layer is not less than twice the diameter of the tensile rope.

[0010] In one embodiment, the tensile rope is formed into the rope net by a plain weave, and the mesh shape is rhomboid.

[0011] In one embodiment, the side length of the mesh is no greater than nine times the diameter of the tensile rope.

[0012] In one embodiment, the mesh is square in shape.

[0013] In one embodiment, the deep-sea sonar satisfies:

[0014] ;

[0015] ;

[0016] ;

[0017] ;

[0018] ;

[0019] ;

[0020] ;in,

[0021] P is the pressure value of the deep-sea sonar at its maximum operating depth, in MPa;

[0022] V0 is the volume of the compressible fluid medium in the pressure balance chamber when the elastic module is not deformed, in liters (L).

[0023] K is the bulk modulus of the compressible fluid medium, in MPa;

[0024] R is the radius of curvature of the elastic module when it is deformed to its limit state, in mm;

[0025] h is the distance between the center of the sphere and the bottom surface of the spherical crown when the elastic module is deformed to its limit state, in mm.

[0026] θ is the central angle corresponding to the arc contour line when the elastic module is deformed to the limit state, and the unit is rad;

[0027] L is the length of the arc-shaped profile when the elastic module is deformed to its limit state, in mm;

[0028] C is the chord length corresponding to the elastic module when it is deformed to the limit state, in mm;

[0029] V 绳网 The percentage of the volume of the rope net in the elastic module is expressed as % .

[0030] E 绳网 The elastic modulus of the rope net is expressed in Pa.

[0031] V 第一弹性层 The percentage of the volume of the first elastic layer in the elastic module is expressed as % (%).

[0032] E 第一弹性层 Here is the elastic modulus of the first elastic layer, in Pa;

[0033] V 第二弹性层 The percentage of the volume of the second elastic layer in the elastic module is expressed as % .

[0034] E 第二弹性层 This is the elastic modulus of the second elastic layer, in Pa.

[0035] E 抗拉绳 The elastic modulus of the tensile rope is expressed in Pa.

[0036] α is the structural correction factor for the rope net;

[0037] η is the weaving density of the rope net;

[0038] d is the diameter of the tensile rope;

[0039] s is the axial distance between two adjacent tensile ropes extending along the warp direction.

[0040] In one embodiment, the elastic module is circular in shape.

[0041] In one embodiment, the method for preparing the elastic module includes the following steps:

[0042] The tensile rope is soaked in a coupling agent solution and then dried.

[0043] The dried tensile rope is woven into a square-shaped first elastic layer to form the rope net;

[0044] A square-shaped second elastic layer is placed over the rope net;

[0045] The first elastic layer and the second elastic layer are squeezed so that a portion of the first elastic layer and the second elastic layer fills the mesh of the rope net;

[0046] The first and second elastic layers after extrusion are cut to obtain a circular elastic module.

[0047] The beneficial effects of this invention are as follows:

[0048] When the deep-sea sonar is in a deep-sea environment, the outside of the pressure balance chamber is under high water pressure. This high water pressure acts simultaneously on the outer surface of the elastic module and the outer surface of the transducer module. Due to the water pressure, the elastic module bends inward towards the shell, causing a decrease in the volume and an increase in the pressure of the compressible fluid medium. This also increases the supporting effect of the compressible fluid medium on the inner surface of the transducer module, thereby reducing the bending deformation of the transducer module in the deep sea and enabling it to better maintain high-performance operation in deep-sea environments.

[0049] The first elastic layer is in direct contact with the compressible fluid medium and only needs to meet the requirements for oil resistance. The second elastic layer is in direct contact with seawater and only needs to meet the requirements for seawater resistance. Based on the layered structure of the first elastic layer, the rope net, and the second elastic layer, the oil and seawater resistance characteristics of the elastic module are satisfied.

[0050] The low elongation of the tensile rope allows the rope net to limit the overall deformation capacity of the elastic module, preventing excessive local deformation. Combined with the rope net's mesh-like mechanical transmission structure, this improves the consistency of deformation across different parts of the elastic module. Furthermore, the first and second elastic layers fill the mesh openings of the rope net, preventing the elastic module's deformation capacity from being entirely dependent on the rope net's deformation capacity. Ultimately, this allows the elastic module's deformation capacity to fall between that of the first elastic layer and the rope net, or between the rope net and the second elastic layer, allowing for appropriate deformation. This approach prevents the elastic module from having an excessively small deformation capacity, ensuring sufficient compressibility of the compressible fluid medium at operating water depths to provide adequate support for the transducer module. It also prevents the elastic module from having an excessively large deformation capacity, thus avoiding significant differences in the actual deformation of different parts of the elastic module under ocean currents.

[0051] In summary, based on the structure of the present invention, in which the rope net is adhered between the first elastic layer and the second elastic layer, and a portion of the first elastic layer and the second elastic layer fills the mesh of the rope net, the elastic module can meet the requirements of oil and seawater resistance while also satisfying the requirements of appropriate deformation capacity. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the three-dimensional structure of the deep-sea sonar in an embodiment of the present invention. Figure 1 ;

[0053] Figure 2 This is a schematic diagram of the three-dimensional structure of the deep-sea sonar in an embodiment of the present invention. Figure 2 ;

[0054] Figure 3 This is a schematic cross-sectional view of the deep-sea sonar in an embodiment of the present invention (the elastic module is not deformed).

[0055] Figure 4 for Figure 3 A magnified structural diagram of part A in the middle;

[0056] Figure 5 This is a schematic cross-sectional view of the deep-sea sonar in an embodiment of the present invention (elastic module deformation).

[0057] Figure 6 for Figure 5 A magnified structural diagram of part B in the middle section;

[0058] Figure 7 This is a three-dimensional structural diagram of the shell in an embodiment of the present invention;

[0059] Figure 8 This is a three-dimensional structural diagram of the elastic module after it has been assembled onto the fixing base in an embodiment of the present invention;

[0060] Figure 9 This is a three-dimensional structural diagram of the fixing base in an embodiment of the present invention;

[0061] Figure 10 This is a cross-sectional structural diagram of the fixing seat in an embodiment of the present invention;

[0062] Figure 11 This is a three-dimensional structural diagram of the elastic module in an embodiment of the present invention;

[0063] Figure 12 This is a perspective view of the elastic module in an embodiment of the present invention;

[0064] Figure 13 This is a schematic diagram of the planar structure of the rope net in an embodiment of the present invention;

[0065] Figure 14 This is a cross-sectional view of the elastic module after it has been assembled into the fixing base in an embodiment of the present invention.

[0066] Figure 15 This is a three-dimensional structural diagram of the elastic module after deformation on the fixed base in an embodiment of the present invention;

[0067] Figure 16 This is a schematic cross-sectional view of the elastic module after deformation on the fixed base in an embodiment of the present invention;

[0068] Figure 17 This describes the state of the elastic module during the manufacturing process in an embodiment of the present invention. Figure 1 ;

[0069] Figure 18 This describes the state of the elastic module during the manufacturing process in an embodiment of the present invention. Figure 2 .

[0070] Figure label:

[0071] 1. Housing; 11. First mounting hole; 12. Second mounting hole; 2. Transducer module; 3. Elastic module; 31. First elastic layer; 32. Rope net; 321. Mesh; 322. Tension rope; 33. Second elastic layer; 34. Fixing base; 341. Step; 4. Pressure balance chamber. Detailed Implementation

[0072] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0073] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0074] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0075] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0076] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0077] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0078] Example:

[0079] like Figure 1 and Figure 2 As shown, this embodiment provides a deep-sea sonar, specifically including a shell 1, a transducer module 2, and an elastic module 3.

[0080] There are typically at least two transducer modules 2. Some transducer modules 2 are transmitting transducers, which are used to emit acoustic signals, while the remaining transducer modules 2 are receiving transducers, which are used to receive reflected acoustic signals. To facilitate the reception of acoustic signals, the receiving transducers are usually designed as flat plates.

[0081] See details Figure 3 and Figure 7 In this embodiment, a first mounting hole 11 is provided on the front side wall of the housing 1, and a second mounting hole 12 is provided on the rear side wall of the housing 1. The transducer module 2 is installed at the first mounting hole 11, thereby blocking the first mounting hole 11, and the elastic module 3 is installed at the second mounting hole 12, thereby blocking the second mounting hole 12. Based on this, the housing 1, the transducer module 2, and the elastic module 3 form a pressure balance cavity 4, which is filled with a compressible fluid medium. Accordingly, both the transducer module 2 and the elastic module 3 will be in contact with the compressible fluid medium.

[0082] The shell 1 is made of a rigid metal material (such as aluminum alloy, stainless steel, or titanium alloy) to ensure the fixed relative position between the receiving transducer and the transmitting transducer, thereby meeting the requirements of the deep-sea sonar imaging algorithm.

[0083] Conversely, the elastic module 3 has the ability to deform. When the pressure it is subjected to changes, it will bend and deform, thereby changing the volume of the pressure balance chamber 4. The volume of the compressible fluid medium will expand or contract adaptively with the change in the volume of the pressure balance chamber 4. Correspondingly, the pressure support that the compressible fluid medium can provide to the transducer module 2 will also change accordingly.

[0084] See Figure 5 It is easy to understand that when the deep-sea sonar is in a deep-sea environment, the outside of the pressure balance chamber 4 is under high water pressure. This high water pressure acts simultaneously on the outer surface of the elastic module 3 and the outer surface of the transducer module 2. Due to the water pressure, the elastic module 3 bends inward towards the shell 1, reducing the volume of the pressure balance chamber 4 and the volume of the compressible fluid medium. Consequently, the pressure of the compressible fluid medium increases, and its support effect on the inner surface of the transducer module 2 also increases. In other words, the water pressure on the outer surface of the transducer module 2 can better balance the pressure of the compressible fluid medium on the inner surface of the transducer module 2, thereby reducing the bending deformation of the transducer module 2 in the deep sea. This allows the transducer module 2 to better maintain high-performance operation in the deep sea.

[0085] Of particular note is that whenever the water pressure outside the deep-sea sonar changes, regardless of the magnitude of the change, the deformation of the elastic module 3 will immediately change accordingly. That is, the elastic module 3 has an instantaneous response characteristic to water pressure changes. As long as the water depth at the location of the deep-sea sonar is not greater than its maximum allowable operating depth, the transducer module 2 can maintain a good balance between internal and external pressure.

[0086] Preferably, a potting material is provided between the transducer module 2 and the edge of the first mounting hole 11. The potting material increases the seal between the transducer module 2 and the edge of the first mounting hole 11, and also provides radial restraint to the transducer module 2, thereby suppressing radial deformation. Therefore, as long as the pressure on the front and rear sides of the transducer module 2 is balanced, the overall deformation of the transducer module 2 can be effectively suppressed. Furthermore, the housing 1 is made of a rigid metal material, which allows for better adhesion to the potting material.

[0087] It is not hard to imagine that the deformation capacity of the elastic module 3 cannot be too small; otherwise, the actual volume that the compressible fluid medium can be compressed will be limited, and the maximum supporting pressure that the compressible fluid medium can provide will be insufficient, which will not meet the requirements of the working water depth of the deep-sea sonar.

[0088] However, what is less noticeable is that the deformation capacity of the elastic module 3 cannot be too large. The reason is that due to the presence of ocean currents in the deep sea, even if the elastic module 3 is at the same water depth, the actual water pressure experienced by different parts of it will vary greatly. If the deformation capacity of the elastic module 3 is too strong, it will lead to a large difference in the actual deformation of different parts of the elastic module 3, which makes the elastic module 3 particularly prone to local damage.

[0089] In conclusion, selecting a material with suitable deformation capacity to manufacture the elastic module 3 is of great significance. Furthermore, since the elastic module 3 needs to come into contact with seawater and compressible fluid media (typically industrial white oil, silicone oil, or transformer oil), the material used to manufacture the elastic module 3 must also meet the requirements of oil and seawater resistance. However, for most materials, it is often difficult to simultaneously achieve both oil and seawater resistance and suitable deformation capacity.

[0090] Based on the above problems, this embodiment provides a specific structure for the elastic module 3, as follows: Figure 11 and Figure 12 As shown. The elastic module 3 described in this embodiment includes a first elastic layer 31, a rope net 32, and a second elastic layer 33. The first elastic layer 31, the rope net 32, and the second elastic layer 33 are generally arranged in layers, wherein the rope net 32 ​​is adhered between the first elastic layer 31 and the second elastic layer 33. Figure 14 As shown, a portion of the first elastic layer 31 and the second elastic layer 33 fills the mesh 321 of the rope net 32, thereby forming the skeleton structure of the deformable part of the entire elastic module 3. The rope net 32 ​​includes several tensile ropes 322, the elongation of which is less than that of the first elastic layer 31 and the second elastic layer 33. In other words, the deformation capacity of the rope net 32 ​​is weaker than that of the first elastic layer 31 and the second elastic layer 33.

[0091] Figures 3-6 As shown, the first elastic layer 31 is in direct contact with the compressible fluid medium, and is separated from seawater by the rope net 32 ​​and the second elastic layer 33. Therefore, it does not directly contact seawater, and correspondingly, the first elastic layer 31 only needs to meet the oil resistance requirement. Similarly, the second elastic layer 33 is in direct contact with seawater, but is separated from the compressible fluid medium by the first elastic layer 31 and the rope net 32. Therefore, the second elastic layer 33 only needs to meet the seawater resistance requirement. Due to the separation of the first elastic layer 31 and the second elastic layer 33, the rope net 32 ​​is neither in direct contact with seawater nor with the compressible fluid medium. Therefore, when selecting materials for the tensile rope 322, only the elongation needs to be considered, and oil and seawater resistance is not required. Based on the layered structure of the first elastic layer 31, the rope net 32, and the second elastic layer 33, the oil and seawater resistance characteristics of the elastic module 3 are satisfied first.

[0092] Secondly, the low elongation of the tensile rope 322 allows the rope net 32 ​​to limit the overall deformation capacity of the elastic module 3, preventing excessive local deformation. Combined with the mesh-like mechanical transmission structure of the rope net 32, it improves the deformation consistency of different parts of the elastic module 3. When the elastic module 3 is impacted, the rope net 32 ​​also helps to disperse the impact force, thereby improving the tensile and compressive strength of the entire elastic module 3, ultimately extending the service life of the deep-sea sonar in the deep sea. Furthermore, the first elastic layer 31 and the second elastic layer 33 fill the mesh 321 in the rope net 32, preventing the deformation capacity of the elastic module 3 from being completely limited by the deformation capacity of the rope net 32. Ultimately, the deformation capacity of the elastic module 3 can be between that of the first elastic layer 31 and the rope net 32, or between that of the rope net 32 ​​and the second elastic layer 33, allowing the elastic module 3 to possess a suitable deformation capacity.

[0093] Optionally, the first elastic layer 31 and the second elastic layer 33 are made of neoprene rubber, and the rope net 32 ​​is made of polyamide. The amide bonds (-CO-NH-) in polyamide undergo hydrolysis under seawater catalysis. Chloride ions in seawater cause the polyamide fibers to swell, reducing their performance. In this embodiment, neoprene rubber acts as a physical barrier directly in contact with seawater. Utilizing its weather resistance, ozone resistance, chemical corrosion resistance, and resistance to seawater salinity, it directly prevents direct contact between seawater and polyamide. Furthermore, it prevents enzymes secreted by marine microorganisms and bacteria from directly contacting the polyamide, protecting it from microbial attachment and biodegradation.

[0094] To ensure that the first elastic layer 31 and the second elastic layer 33 can fully fill the mesh 321, the thickness of the first elastic layer 31 and the second elastic layer 33 is generally not less than twice the diameter of the tensile rope 322.

[0095] like Figure 13 As shown, in this embodiment, the tensile rope 322 is formed into the rope net 32 ​​using a plain weave, and the mesh 321 is rhomboid in shape. Therefore, by changing the side length and apex angle β of the mesh 321, the overall deformation capability of the rope net 32 ​​can be adjusted; the larger the side length and β, the better the deformation capability of the rope net 32. For example, in this embodiment, β = 90°, and the side length of the mesh 321 is no greater than nine times the diameter of the tensile rope 322; in other words, the mesh 321 in this embodiment is square.

[0096] like Figure 6 , Figures 8-10 As shown, in this embodiment, the elastic module 3 is mounted on a fixed base 34. The fixed base 34 is generally annular and is fixed to the rear outer wall of the housing 1. A step 341 is provided on the inner wall of the fixed base 34. The depth of the step 341 in the axial direction of the fixed base 34 is 'a', and the width in the radial direction of the fixed base 34 is 'b'. Figure 14 As shown, the edge of the first elastic layer 31 is adhered to the step 341, so the portion of the elastic module 3 at the step 341 cannot deform; only the central portion of the elastic module 3 can deform. For example, in this embodiment, the elastic module 3 is circular in shape with a diameter of D. In other words, in this embodiment, only the circular portion with a diameter of D-2b at the center of the elastic module 3 can deform on the fixing base 34.

[0097] See details Figure 14 When the elastic module 3 does not deform, the entire elastic module 3 is roughly flat. At this time, the volume of the compressible fluid medium in the pressure balance chamber 4 is V0, and the unit is L.

[0098] See details Figure 15 and Figure 16 As mentioned above, since the deformation consistency of different parts of the elastic module 3 has been improved in this embodiment, after the central part of the elastic module 3 bulges into the shell 1 under the pressure of seawater, the part of the elastic module 3 that deforms at the center is approximately a spherical cap, and the corresponding spherical cap volume can be used to compress the volume of the fluid medium.

[0099] When the elastic module 3 deforms to its limit, the volume of the spherical cap is: Where R is the radius of curvature (i.e., the radius of the spherical cap) when the elastic module 3 is deformed to its limit state, in mm; h is the distance between the center of the sphere and the bottom surface of the spherical cap when the elastic module 3 is deformed to its limit state, in mm.

[0100] R and h are determined by the specific structure of the elastic module 3. They correspond to satisfying... ; ; ; ; ; .

[0101] θ is the central angle corresponding to the arc contour line when the elastic module 3 is deformed to its limit state, in rad; L is the length of the arc contour line when the elastic module 3 is deformed to its limit state, in mm; C is the chord length corresponding to the elastic module 3 being deformed to its limit state, in mm (in this embodiment, C = D - 2b); V 绳网 E represents the volume percentage of the rope net 32 ​​in the elastic module 3, expressed as % . 绳网 V represents the elastic modulus of rope net 32, in Pa; 第一弹性层 E represents the volume percentage of the first elastic layer 31 in the elastic module 3, expressed as % . 第一弹性层 V represents the elastic modulus of the first elastic layer 31, in Pa; 第二弹性层 E represents the volume percentage of the second elastic layer 33 in the elastic module 3, expressed as % .第二弹性层 E represents the elastic modulus of the second elastic layer 33, in Pa. 抗拉绳 α is the elastic modulus of the tensile rope 322, in Pa; α is the structural correction coefficient of the rope net 32; η is the weaving density of the rope net 32; d is the diameter of the tensile rope 322; and s is the axial distance between two adjacent tensile ropes 322 extending along the warp direction.

[0102] When a deep-sea sonar is at its maximum operating depth, the water pressure is P, measured in MPa. The volume of a compressible fluid medium that needs to be compressed to balance the water pressure is... , where K is the bulk modulus of the compressible fluid medium, in MPa.

[0103] It is easy to understand that, in order to ensure that the transducer module 2 can maintain internal and external pressure balance when the deep-sea sonar is at its maximum operating depth, it must meet the following requirements. .

[0104] This embodiment also provides a method for preparing the elastic module 3, including the following steps:

[0105] Step S1: Immerse the tensile rope 322 in a coupling agent solution (KH-550 solution with a concentration of 5wt%) for 30 minutes, and then take it out and place it in an oven at 100°C for drying for 60 minutes to remove unreacted coupling agent solution.

[0106] Step S2: As Figure 17 As shown, a square first elastic layer 31 (300mm×300mm×3mm) is selected, and the tensile rope 322 is woven into the first elastic layer 31 in a plain weave to form a rope net 32.

[0107] In step S2, the diameter of the tensile rope 322 is d=1.5mm, the total length of a single tensile rope 322 is 300mm, and s=5mm. Therefore, the number of tensile ropes 322 extending radially and the number of tensile ropes 322 extending latitudinally are both 59. Accordingly, the total volume of the rope net 32 ​​is 59×2×π×(d / 2). 2 ×300, which is 62557mm 3 .

[0108] In step S2, the weaving density of the rope net 32 ​​is η=0.51, the structural correction coefficient of the rope net 32 ​​is α=0.9, and E 抗拉绳 =3GPa, E 绳网 =0.9×0.51×3GPa=1.377GPa.

[0109] In step S2, the volume of the first elastic layer 31 is 300mm × 300mm × 3mm, which is 270000mm. 3The first elastic layer 31 is made of neoprene rubber, therefore E 第一弹性层 =0.1GPa.

[0110] Step S3: As Figure 18 As shown, a square second elastic layer 33 (300mm×300mm×3mm) is selected and covered on the rope net 32.

[0111] In step S3, the volume of the second elastic layer 33 is 300mm × 300mm × 3mm, which is 270000mm. 3 .

[0112] The second elastic layer 33 is made of neoprene rubber, therefore E 第二弹性层 =0.1GPa.

[0113] Step S4: Use a tool to compress the first elastic layer 31 and the second elastic layer 33 with a compressive force of 5 MPa, so that a portion of the first elastic layer 31 and the second elastic layer 33 fills the mesh 321 of the rope net 32.

[0114] At this time V 绳网 =62557 / (62557+270000×2)≈10%, V 第一弹性层 =V 第二弹性层 ≈45%.

[0115] The coupling agent increases the adhesion strength between the rope mesh 32 and the first elastic layer 31, as well as between the rope mesh 32 and the second elastic layer 33. This increased adhesion strength helps the rope mesh 32 absorb and disperse local stress when the first elastic layer 31 and the second elastic layer 33 are subjected to impact. This not only inhibits the formation of cracks within the first elastic layer 31 and the second elastic layer 33, but also inhibits the propagation of cracks between the first elastic layer 31 and the second elastic layer 33, thereby effectively improving the tear resistance and durability of the elastic module 3.

[0116] Step S5: Cut the extruded first elastic layer 31 and second elastic layer 33 to obtain a circular elastic module 3 with a diameter of 220mm.

[0117] The step 341 on the fixing seat 34 is thoroughly wiped and cleaned with a clean disposable cloth soaked in acetone or isopropanol. Then, a layer of Chemlok 205 solvent is sprayed onto the step 341, ensuring a dry film thickness of 9μm ± 2μm. The step is then placed in a 60℃ oven for 20 minutes. After the oven is heated, a layer of Chemlok 220LF solvent is sprayed onto the step 341, ensuring a dry film thickness of 18μm ± 2μm. The step is then placed in a 60℃ oven for another 20 minutes. Finally, the circular elastic module 3 is attached to the step 341 and clamped at a pressure of 5MPa. The step is then placed in a 150℃ oven for 60 minutes.

[0118] The maximum operating depth of the deep-sea sonar in this embodiment is 6000m, corresponding to P=60MPa, V0=3.5L, K=1400MPa, and PV0 / K=0.15L. L=252.6mm, R=109.7mm, θ=2.3rad, h=45.1mm. =1156500mm 3 It is approximately 1.16L, which is much greater than 0.15L.

[0119] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0120] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A deep-sea sonar, characterized in that, The device includes a housing (1), a transducer module (2), and an elastic module (3). The housing (1) has a first mounting hole (11) and a second mounting hole (12) on its side wall. The transducer module (2) is installed at the first mounting hole (11), and the elastic module (3) is installed at the second mounting hole (12). The housing (1), the transducer module (2), and the elastic module (3) form a pressure balance cavity (4), which is filled with a compressible fluid medium. The elastic module (3) includes a first elastic layer (31), a rope net (32), and a second elastic layer (33). The rope net (32) is bonded between the first elastic layer (31) and the second elastic layer (33), and a portion of the first elastic layer (31) and the second elastic layer (33) fills the mesh (321) of the rope net (32). The rope net (32) includes a plurality of tensile ropes (322), and the elongation of the tensile ropes (322) is less than the elongation of the first elastic layer (31) and the second elastic layer (33). The compressible fluid medium is industrial white oil, silicone oil or transformer oil, the first elastic layer (31) and the second elastic layer (33) are made of neoprene rubber, and the rope net (32) is made of polyamide. The thickness of the first elastic layer (31) and the second elastic layer (33) is not less than twice the diameter of the tensile rope (322); The tensile rope (322) is formed into the rope net (32) by plain weave, and the mesh (321) is rhomboid in shape; The mesh (321) is square in shape; The deep-sea sonar satisfies: ； ； ； ； ； ； ;in, P is the pressure value of the deep-sea sonar at its maximum operating depth, in MPa; V0 is the volume of the compressible fluid medium in the pressure balance chamber (4) when the elastic module (3) is not deformed, in L; K is the bulk modulus of the compressible fluid medium, in MPa; R is the radius of curvature of the elastic module (3) when it is deformed to the limit state, in mm; h is the distance between the center of the ball and the bottom surface of the spherical crown when the elastic module (3) is deformed to the limit state, in mm; θ is the central angle of the arc contour line when the elastic module (3) is deformed to the limit state, and the unit is rad; L is the length of the arc-shaped profile when the elastic module (3) is deformed to the limit state, in mm; C is the chord length corresponding to the elastic module (3) when it is deformed to the limit state, in mm; V 绳网 The percentage of the volume of the rope net (32) in the elastic module (3) is expressed as % %. E 绳网 The elastic modulus of the rope net (32) is expressed in Pa. V 第一弹性层 The percentage of the volume of the first elastic layer (31) in the elastic module (3), expressed in % %. E 第一弹性层 The elastic modulus of the first elastic layer (31) is expressed in Pa. V 第二弹性层 The percentage of the volume of the second elastic layer (33) in the elastic module (3), expressed in % %. E 第二弹性层 The elastic modulus of the second elastic layer (33) is expressed in Pa. E 抗拉绳 The elastic modulus of the tensile rope (322) is expressed in Pa. α is the structural correction factor of the rope net (32); η is the weaving density of the rope net (32); d is the diameter of the tensile rope (322); s is the axial distance between two adjacent tensile ropes (322) extending along the longitudinal direction.

2. The deep-sea sonar according to claim 1, characterized in that, A potting material is provided between the edge of the transducer module (2) and the first mounting hole (11).

3. The deep-sea sonar according to claim 1, characterized in that, The side length of the mesh (321) is no more than nine times the diameter of the tensile rope (322).

4. The deep-sea sonar according to claim 1, characterized in that, The elastic module (3) is circular in shape.

5. The deep-sea sonar according to claim 1, characterized in that, The preparation method of the elastic module (3) includes the following steps: The tensile rope (322) is soaked in a coupling agent solution and then dried; the dried tensile rope (322) is woven on a square first elastic layer (31) to form the rope net (32). A square-shaped second elastic layer (33) is placed over the rope net (32); The first elastic layer (31) and the second elastic layer (33) are squeezed so that a portion of the first elastic layer (31) and the second elastic layer (33) fills the mesh (321) of the rope net (32); The extruded first elastic layer (31) and second elastic layer (33) are cut to obtain a circular elastic module (3).

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