Omnidirectional deepwater hydrophone

Abstract

The utility model provides an omni-directional deepwater hydrophone, which relates to the technical field of ocean exploration equipment and comprises a shell, a waterproof connector, a base and a movement unit, the base and the movement unit are arranged in the shell, the movement unit is fixed on the base and used for detecting signals in water, and the waterproof connector is arranged in the shell. The number of the movement units is at least three, the movement units are evenly distributed along the periphery of the base, the movement units are connected in parallel, namely the movement units form a circle in a surrounding mode, the movement can receive signals in all directions, the sensitivity of the hydrophone is improved, and therefore the problem that in the prior art, signal receiving in the direction perpendicular to the movement units is poor is solved. Therefore, the sensitivity of the hydrophone is improved, detection can be carried out in a deeper water area, and the field where people can detect is increased, in order to facilitate wiring, the waterproof connector is installed at one end, away from the movement unit, of the base and used for sealing the opening position of the shell, and the shell is formed through injection molding to form a whole.

Description

Technical Field

[0001] The utility model relates to the technical field of marine exploration equipment, in particular to an omnidirectional deep-water hydrophone. Background Art

[0002] At present, the most widely used hydrophone in underwater survey is the piezoelectric ceramic hydrophone. The ceramic processing process is simple and easy to operate, and it can be made into different shapes. It has strong piezoelectric properties and high electromechanical coupling coefficients. However, the hydrophone used in marine exploration is composed of two sets of piezoelectric ceramics in parallel, and the two are arranged in parallel, with poor directivity. The receiving sensitivity in the direction perpendicular to the piezoelectric ceramics is very weak, which results in the hydrophone only working in relatively shallow waters. Utility Model Content

[0003] The purpose of the utility model is to provide an omnidirectional deep-water hydrophone to solve the technical problem that the hydrophone in the prior art is composed of two groups of piezoelectric ceramics connected in parallel, has poor directivity, and has weak receiving sensitivity in the direction perpendicular to the piezoelectric ceramics. The preferred technical solution among the many technical solutions provided by the utility model can produce many technical effects as described below.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] The utility model provides an omnidirectional deep-water hydrophone, comprising a shell, a waterproof connector, a base, and a core unit. The base and the core unit are both arranged in the shell, the core unit is fixed on the base, and at least three core units are arranged and evenly distributed along the periphery of the base. A plurality of the core units are connected in parallel, and the waterproof connector is installed at one end of the base away from the core unit, and is used to close the opening position of the shell.

[0006] Preferably, three core units are provided and distributed in the shape of an equilateral triangle.

[0007] Preferably, the core unit comprises a bracket, a sealing gland, and a piezoelectric ceramic, wherein the piezoelectric ceramic is on the bracket, and the piezoelectric ceramic is used to press and fix the piezoelectric ceramic.

[0008] Preferably, a first O-ring is provided between the piezoelectric ceramic and the sealing gland.

[0009] Preferably, the bracket is provided with a first cavity, a filling layer is provided in the first cavity, the material of the filling layer is silicone oil, and the piezoelectric ceramics are provided on both sides of the bracket.

[0010] Preferably, the base is provided with an oil filling hole and a sealing member arranged on the oil filling hole, the first cavity is connected with the oil filling hole, and the oil filling hole is provided on the oil filling hole.

[0011] Preferably, the bracket is provided with an impedance matching coil on one side where the core unit is installed, and the impedance matching collar is arranged in the space surrounded by the core unit.

[0012] Preferably, a second O-ring is provided on the waterproof connector.

[0013] Preferably, a copper substrate is further included. The copper substrate is mounted on both sides of the piezoelectric ceramic and is fixed on the bracket.

[0014] Preferably, the material of the shell is two-component polyurethane.

[0015] The technical solution provided by this application document includes the following beneficial effects:

[0016] The utility model provides an omnidirectional deep-water hydrophone, including a shell, a waterproof connector, a base, and a core unit, wherein the base and the core unit are both arranged in the shell, the core unit is fixed on the base, and the core unit is used to detect signals in the water, wherein at least three core units are arranged and evenly distributed along the periphery of the base, and multiple core units are connected in parallel, that is, multiple core units are formed around a circle, and the core can receive signals in all directions, thereby increasing the sensitivity of the hydrophone, thus solving the problem of poor signal reception in the direction perpendicular to the core unit in the prior art. In this way, the sensitivity of the hydrophone is increased, and it can detect deeper waters, increasing the area that people can detect, wherein, in order to facilitate wiring, the waterproof connector is installed at one end of the base away from the core unit, and is used to close the opening position of the shell, wherein the shell is completed by injection molding to form an integral body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a schematic diagram showing a three-dimensional structure of a hydrophone according to an exemplary embodiment;

[0019] Figure 2 is a schematic diagram showing a structure of a hydrophone outside a housing according to an exemplary embodiment;

[0020] Figure 3 is a schematic diagram showing a cross-sectional structure of a hydrophone according to an exemplary embodiment;

[0021] Figure 4 is a front view showing a hydrophone outside a housing according to an exemplary embodiment;

[0022] Figure 5 yes Figure 4 Middle BB section view;

[0023] Figure 6 It is a cross-sectional view of the movement unit.

[0024] In the figure: 1. housing; 2. waterproof connector; 3. base; 4. movement unit; 41. bracket; 42. sealing gland; 43. piezoelectric ceramic; 44. copper substrate; 5. first O-ring; 6. second O-ring; 7. oil filling hole; 8. impedance matching coil. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0026] This specific implementation provides an omnidirectional deep-water hydrophone, which solves the technical problem in the prior art that the hydrophone is composed of two groups of piezoelectric ceramics connected in parallel, has poor directivity, and has very weak receiving sensitivity in the direction perpendicular to the piezoelectric ceramics.

[0027] The following is an explanation of the embodiments with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the contents of the utility model described in the claims. In addition, the entire contents of the structures represented by the following embodiments are not limited to the solutions required as the utility model described in the claims.

[0028] Reference Figure 1-Figure 6The utility model provides an omnidirectional deep-water hydrophone, including a housing 1, a waterproof connector 2, a base 3, and a core unit 4, wherein the base 3 and the core unit 4 are both arranged in the housing 1, the core unit 4 is fixed on the base 3, and the core unit 4 is used to detect signals in the water, wherein at least three core units 4 are arranged, evenly distributed along the periphery of the base 3, and multiple core units 4 are connected in parallel, that is, multiple core units 4 are formed around a circle, and the core can receive signals in all directions, thereby increasing the sensitivity of the hydrophone, thus solving the problem of poor signal reception in the direction perpendicular to the core unit 4 in the prior art. In this way, the sensitivity of the hydrophone is increased, and it can detect deeper waters, increasing the area that people can detect, wherein, in order to facilitate wiring, the waterproof connector 2 is installed at one end of the base 3 away from the core unit 4, and is used to close the opening position of the housing 1, wherein the housing 1 is completed by injection molding to form a whole.

[0029] The material of the outer shell 1 is two-component polyurethane, which has excellent wear resistance, low-temperature flexibility, a wide range of adjustable performance, high mechanical strength, good adhesion, good elasticity, and excellent recovery, and is suitable for dynamic joints, deformation joints, and expansion joints. It has good weather resistance, excellent oil resistance, resistance to biological aging, and low price.

[0030] In this embodiment, Figure 2 As shown, three core units 4 are provided and distributed in the shape of an equilateral triangle to form a ring. The side perpendicular to any core unit 4 is received by other core units 4, thereby increasing the sensitivity of the hydrophone.

[0031] Specifically, Figure 6 As shown, the movement unit 4 includes a bracket 41, a sealing cover 42, a piezoelectric ceramic 43, and a fixing assembly, wherein the bracket 41 provides support, the piezoelectric ceramic 43 is on the bracket 41, and in order to facilitate the fixing of the piezoelectric ceramic 43, the sealing cover 42 is used to press and fix the piezoelectric ceramic 43, wherein the fixing assembly is used to fix the sealing cover 42 on the bracket 41 to prevent the piezoelectric ceramic 43 from detaching from the bracket 41, wherein the fixing assembly is not limited to bolts and nuts, wherein the bracket 41 and the sealing cover 42 are both provided with mounting holes, and the bolts are passed through the mounting holes on the bracket 41 and the sealing cover 42, thereby fixing the sealing cover 42.

[0032] In this embodiment, in order to avoid contact between the sealing cover 42 and the piezoelectric ceramic 43 and to prevent the piezoelectric ceramic 43 from being crushed, a first O-ring 5 is provided between the piezoelectric ceramic 43 and the sealing cover 42. The first O-ring 5 is nitrile rubber. Nitrile rubber is a copolymer formed by polymerization of acrylonitrile and butadiene monomers, and is mainly produced by low-temperature emulsion polymerization. It has excellent oil resistance, high wear resistance, good heat resistance, and strong adhesion.

[0033] In this embodiment, in order to increase the sensitivity, the bracket 41 is provided with a first cavity, a filling layer is provided in the first cavity, the material of the filling layer is silicone oil, and the piezoelectric ceramics 43 are provided on both sides of the bracket 41, that is, the bracket 41 is provided with the first cavity to form a drum shape, and the piezoelectric ceramics 43 are installed on two end faces. The first cavity is filled with silicone oil to form a fully oil-filled closed inner cavity, which improves the coupling of the signal on the one hand, and improves the water pressure resistance of the entire hydrophone on the other hand, thereby increasing its working water depth.

[0034] In this embodiment, in order to facilitate the silicone oil to enter the first cavity, an oil filling hole 7 and a sealing member arranged on the oil filling hole 7 are arranged on the base 3, and the first cavity is connected to the oil filling hole 7. The oil filling hole 7 is arranged on the oil filling hole 7. When people use it, they remove the sealing member and fill the silicone oil into the first cavity through the oil filling hole 7. When people inject the silicone oil, the silicone oil needs to be de-bubbled before being injected into the first cavity through the oil filling hole 7.

[0035] In this embodiment, in order to reduce the output impedance of the piezoelectric ceramic 43 and improve the output efficiency and load capacity of the piezoelectric ceramic 43, an impedance matching coil 8 is provided on one side of the bracket 41 where the core unit 4 is installed, and the impedance matching coil 8 is arranged in the space surrounded by the core unit 4.

[0036] In this embodiment, a copper substrate 44 is also included. Copper substrates 44 are installed on both sides of the piezoelectric ceramic 43. The copper substrate 44 is fixed on the bracket 41. Since the piezoelectric ceramic 43 is relatively thin, in order to facilitate people's installation, the piezoelectric ceramic 43 is first installed on the copper substrate 44, and then the copper substrate 44 is installed on the bracket 41. The thickness of the copper substrate 44 is 0.7-1.2 mm.

[0037] In this embodiment, in order to ensure the airtightness of the connection between the waterproof connector 2 and other parts, a second O-ring 6 is provided on the waterproof connector 2 .

[0038] It should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. used herein to indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0039] In the description of this article, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0040] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

[0041] It is to be understood that the same or similar parts in the above embodiments can refer to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments. The multiple schemes provided in this application include their own basic schemes, which are independent of each other and do not restrict each other, but they can also be combined with each other without conflict to achieve multiple effects together.

[0042] Although the embodiments of the present application have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present application. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An omnidirectional deep-water hydrophone, characterized in that: The invention comprises a housing (1), a waterproof connector (2), a base (3), and a core unit (4); the base (3) and the core unit (4) are both arranged in the housing (1); the core unit (4) is fixed on the base (3); at least three core units (4) are arranged and are evenly distributed along the periphery of the base (3); a plurality of core units (4) are connected in parallel; the waterproof connector (2) is installed at one end of the base (3) away from the core unit (4) and is used to close the opening of the housing (1).

2. The omnidirectional deep-water hydrophone according to claim 1, characterized in that: The core units (4) are provided in three numbers and are distributed in the shape of an equilateral triangle.

3. The omnidirectional deep-water hydrophone according to claim 1, characterized in that: The core unit comprises a bracket (41), a sealing gland (42), and a piezoelectric ceramic (43); the piezoelectric ceramic (43) is on the bracket (41); and the piezoelectric ceramic (43) is used to press and fix the piezoelectric ceramic (43).

4. The omnidirectional deep-water hydrophone according to claim 3, characterized in that: A first O-type sealing ring (5) is arranged between the piezoelectric ceramic (43) and the sealing gland (42).

5. The omnidirectional deep-water hydrophone according to claim 3, characterized in that: The support (41) is provided with a first cavity, a filling layer is provided in the first cavity, the material of the filling layer is silicone oil, and the piezoelectric ceramics (43) are provided on both sides of the support (41).

6. The omnidirectional deep-water hydrophone according to claim 5, characterized in that: The base (3) is provided with an oil filling hole (7) and a sealing member arranged on the oil filling hole (7); the first cavity is connected to the oil filling hole (7); and the oil filling hole (7) is provided on the oil filling hole (7).

7. The omnidirectional deep-water hydrophone according to claim 3, characterized in that: The support (41) is provided with an impedance matching coil (8) on one side of which the core unit (4) is mounted, and the impedance matching collar is arranged in the space surrounded by the core unit (4).

8. The omnidirectional deep-water hydrophone according to claim 1, characterized in that: The waterproof connector (2) is provided with a second O-ring (6).

9. The omnidirectional deep-water hydrophone according to claim 3, characterized in that: It also includes a copper substrate (44), the copper substrate (44) being mounted on both sides of the piezoelectric ceramic (43), and the copper substrate (44) being fixed on the bracket (41).

10. The omnidirectional deep-water hydrophone according to claim 1, characterized in that: The material of the shell (1) is two-component polyurethane.

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