Anti-electromagnetic interference hydrophone

Abstract

The utility model discloses an anti-electromagnetic interference hydrophone, which comprises a hydrophone and a shell, the shell comprises an upper shell, a lower shell, an outer metal layer, a middle metal layer and an inner metal layer, and the outer metal layer, the middle metal layer and the inner metal layer are sequentially fixed on the lower shell from outside to inside by taking the circle center of the lower shell as a reference. The upper shell is detachably fixed to the tops of the outer metal layer, the middle metal layer and the inner metal layer, the outer metal layer, the middle metal layer and the inner metal layer are each provided with an acoustic window, the acoustic windows on the three different metal layers are opposite in position, a first electromagnetic shielding assembly is arranged at the acoustic window of the outer metal layer, and a second electromagnetic shielding assembly is arranged at the acoustic window of the middle metal layer. Second electromagnetic shielding assemblies are arranged at the acoustic window of the middle metal layer and the acoustic window of the inner side metal layer, the upper shell and the lower shell are each provided with a plurality of first clamping assemblies, and a plurality of second clamping assemblies are fixed to the side wall of the inner side metal layer. The hydrophone has the advantages that the interference of external electromagnetism on the hydrophone is reduced, and the signal quality, the measurement precision and the reliability of the hydrophone are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydrophone technical field, concretely is a kind of hydrophone of anti-electromagnetic interference. BACKGROUND

[0002] Hydrophone is an important sensor for detecting and receiving underwater acoustic signals, widely used in ocean acoustic monitoring, underwater communication, underwater navigation, sonar system and seismic exploration fields. With the continuous development of modern electronic technology, the sensitivity and accuracy of hydrophone have been significantly improved. However, this also makes the hydrophone more susceptible to external electromagnetic interference (EMI). Electromagnetic interference can significantly reduce the signal quality of hydrophone, affect its measurement accuracy and reliability. Therefore, electromagnetic shielding becomes a crucial part of hydrophone design. SUMMARY

[0003] The technical problem to be solved by the utility model is that the hydrophone is susceptible to external electromagnetic interference, which can reduce the signal quality of the hydrophone and affect its measurement accuracy and reliability.

[0004] The technical solution adopted is as follows:

[0005] A kind of hydrophone of anti-electromagnetic interference, including hydrophone and the shell being arranged in the outside of hydrophone, the shell includes upper shell, lower shell, outer metal layer, middle metal layer and inner metal layer, outer metal layer, middle metal layer and inner metal layer are fixed on lower shell in turn from outside to inside with lower shell center as reference, upper shell is detachably fixed on the top of outer metal layer, middle metal layer and inner metal layer, an acoustic window is arranged on outer metal layer, middle metal layer and inner metal layer, the acoustic window positions on the three different metal layers are opposite, a first electromagnetic shielding assembly is arranged at the acoustic window of outer metal layer, a second electromagnetic shielding assembly is arranged at the acoustic window of middle metal layer and inner metal layer, a plurality of first clamping assemblies are arranged on upper shell and lower shell, and a plurality of second clamping assemblies are fixed on the side wall of inner metal layer.

[0006] Further optimization of the technical solution of the utility model, the first electromagnetic shielding assembly includes a learning window, the acoustic window is fixed inside the acoustic window of outer metal layer, a conductive sealing ring is arranged between the acoustic window and outer metal layer, a first electromagnetic shielding net is arranged on the other side of acoustic window, and the conductive sealing ring is electrically connected with the first electromagnetic shielding net and outer metal layer respectively; to ensure waterproof while forming a continuous electromagnetic shielding path for electromagnetic shielding.

[0007] Further optimization of the technical solution of the utility model, the acoustic window is made of polyurethane material; to reduce the influence on sound wave, so that the hydrophone can more accurately absorb sound wave.

[0008] Further optimization of the technical scheme of the utility model, the second electromagnetic shielding assembly includes second electromagnetic shielding net, be used for further shielding.

[0009] Further optimization of the technical scheme of the utility model, the first clamping assembly includes first clamping plate, and the first clamping plate is fixed on the upper shell or lower shell through multiple damping components, and the first clamping assembly arranged on the upper shell and lower shell respectively is used for fixing hydrophone up and down and reducing the up and down vibration of hydrophone caused by external impact.

[0010] Further optimization of the technical scheme of the utility model, the second clamping component assembly includes second clamping plate, and the second clamping plate is fixed on the inner metal layer side wall through multiple damping components, and the second clamping component assembly is used for clamping hydrophone in cooperation with multiple second clamping assemblies, so as to reduce the left and right vibration of hydrophone caused by external impact.

[0011] Further optimization of the technical scheme of the utility model, the upper shell is provided with a through hole in the center, a waterproof connector is arranged at the through hole, and a conductive sealing ring is also arranged between the waterproof connector and the through hole, so as to connect the external cable through the waterproof connector, and the conductive sealing ring ensures the electromagnetic shielding path between the waterproof connector and the upper shell.

[0012] Further optimization of the technical scheme of the utility model, the upper shell is provided with a first circular groove and a second circular groove at the bottom, the first circular groove is opposite to the intermediate metal layer, the second circular groove is opposite to the inner metal layer, a conductive sealing ring is fixed in the first circular groove and the second circular groove, and a conductive sealing ring is also arranged on the contact surface of the outer metal layer and the upper shell, so as to form the electromagnetic shielding path between the upper shell and the outer metal layer, the intermediate metal layer and the inner metal layer respectively, and ensure the waterproof performance of the whole shell.

[0013] Further optimization of the technical scheme of the utility model, the height of the intermediate metal layer and the inner metal layer is higher than the height of the outer metal layer.

[0014] Further optimization of the technical scheme of the utility model, the outer side of the intermediate metal layer and the outer side of the inner metal layer are provided with multiple heat dissipation fins, so as to transfer the heat in the inner metal layer to the intermediate metal layer, and then transfer the heat to the outer metal layer, thereby dissipating the heat.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] 1. The utility model discloses an electromagnetic shielding path of the whole shell is formed through setting first electromagnetic shielding assembly at the acoustic window of the outer metal layer, setting second electromagnetic shielding assembly at the acoustic window of the middle metal layer and the acoustic window of the inner metal layer, setting conductive sealing ring between the upper shell and the outer metal layer, the middle metal layer, the inner metal layer and waterproof connector, reduces the influence of external electromagnetic interference on the hydrophone, guarantees the signal quality and measurement accuracy and reliability of the hydrophone.

[0017] 2. The utility model discloses setting acoustic window in the middle metal layer and the inner metal layer, and the outer side of the middle metal layer and the outer side of the inner metal layer are equipped with a plurality of cooling fins, which can transfer heat in the inner metal layer to the middle metal layer, and the middle metal layer transfers heat to the outer metal layer, thereby dissipating heat.

[0018] 3. The utility model discloses the fixing of hydrophone is realized through the cooperation of first clamping component and second clamping component, and the influence of external impact on the hydrophone can be reduced under the cooperation of a plurality of damping components. DRAWINGS

[0019] Figure 1 It is the whole structure schematic diagram of this embodiment;

[0020] Figure 2 It is the whole structure partial section view of this embodiment;

[0021] Figure 3 It is the structure section view of this embodiment and removes the cooling fin part;

[0022] Figure 4 It is the upper shell of this embodiment and looks up;

[0023] Mark explanation: 1, lower shell;2, upper shell;3, outer metal layer;4, middle metal layer;5, inner metal layer;6, first clamping component;7, second clamping component;8, damping component;9, cooling fin;10, waterproof connector;21, first circular groove;22, second circular groove;31, the acoustic window of outer metal layer;61, first clamping plate;71, second clamping plate. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following combines the drawing and embodiment, and further detailedly explains the utility model. EMBODIMENT

[0025] As Figures 1-4 shown, the utility model discloses a kind of electromagnetic interference resistant hydrophones of the utility model, including hydrophone and the shell of setting in the outside of hydrophone.

[0026] As Figure 2As shown, in this embodiment, the outer shell includes an upper shell 2, a lower shell 1, an outer metal layer 3, a middle metal layer 4, and an inner metal layer 5. The outer metal layer 3, the middle metal layer 4, and the inner metal layer 5 are fixed to the lower shell 1 sequentially from the outside to the inside, with the center of the lower shell 1 as the reference. The outer metal layer 3 is fixed at the edge of the lower shell 1. The outer metal layer 3, the middle metal layer 4, and the inner metal layer 5 are welded to the lower shell 1 respectively.

[0027] The upper shell 2 is detachably fixed to the top of the outer metal layer 3, the middle metal layer 4, and the inner metal layer 5 by bolts. On the opposite surfaces of the upper shell 2 and the lower shell 1, a first circular groove 21 and a second circular groove 22 are opened. The first circular groove 21 is opposite to the middle metal layer 4, and the second circular groove 22 is opposite to the inner metal layer 5. Conductive sealing rings are fixed inside the first circular groove 21 and the second circular groove 22. Conductive sealing rings are also provided on the contact surface between the outer metal layer 3 and the upper shell 2 to ensure the sealing between the upper shell 2 and the outer metal layer 3, the middle metal layer 4 and the inner metal layer 5. At the same time, electromagnetic shielding paths are formed between the upper shell 2 and the outer metal layer 3 and the lower shell 1, between the upper shell 2 and the middle metal layer 4 and the lower shell 1, and between the outer shell and the inner metal layer 5 and the lower shell 1 to avoid electromagnetic interference to the hydrophone.

[0028] In this embodiment, a through hole is opened at the center of the upper shell 2, and a waterproof connector 10 is provided at the through hole. A conductive sealing ring is also provided between the waterproof connector 10 and the through hole. This is used for the hydrophone to connect to external cables through the waterproof connector 10, while the conductive sealing ring ensures the electromagnetic shielding path between the waterproof connector 10 and the upper shell 2.

[0029] like Figure 4 As shown, in this embodiment, an acoustic window is provided on the outer metal layer 3, the middle metal layer 4 and the inner metal layer 5, and the acoustic windows on the three different metal layers are positioned relative to each other.

[0030] A first electromagnetic shielding assembly is provided at the acoustic window of the outer metal layer 3. The first electromagnetic shielding assembly includes an acoustic window, which is fixed to the inner side of the acoustic window of the outer metal layer 3 by bolts. A conductive sealing ring is provided between the acoustic window and the outer metal layer 3. A first electromagnetic shielding mesh is provided on the other side of the acoustic window. The conductive sealing ring is electrically connected to the first electromagnetic shielding mesh and the outer metal layer 3 respectively. This is used to ensure waterproofing while forming a continuous electromagnetic shielding path for electromagnetic shielding.

[0031] In this embodiment, the acoustic window is made of polyurethane material to reduce the impact on sound waves, enabling the hydrophone to absorb sound waves more accurately.

[0032] The second electromagnetic shielding assembly is provided at the acoustic window of the intermediate metal layer 4 and the inner metal layer 5, and comprises a second electromagnetic shielding net, the second electromagnetic shielding net provided at the acoustic window of the intermediate metal layer 4 is electrically connected with the intermediate metal layer 4, and the second electromagnetic shielding net provided at the acoustic window of the inner metal layer 5 is electrically connected with the inner metal layer 5, so as to further shield electromagnetic interference.

[0033] As shown in Figure 2 and Figure 3 In the embodiment, the inner side wall of the inner metal layer 5 is provided with a second clamping assembly 7 around the periphery, the second clamping assembly 7 comprises a second clamping plate 71, the second clamping plate 71 is fixed on the side wall of the inner metal layer 5 through a damping assembly 8, and the multiple second clamping assemblies 7 cooperate to clamp the hydrophone, and the damping assembly 8 reduces the left and right vibration of the hydrophone caused by external impact.

[0034] In the embodiment, the damping assembly 8 comprises a damper and a spring, the spring is sleeved outside the damper, the damper of the damping assembly 8 provided between the second clamping plate 71 and the side wall of the inner metal layer 5 is fixedly connected with the side wall of the inner metal layer 5 at one end and fixedly connected with the second clamping plate 71 at the other end.

[0035] In the embodiment, the second clamping plate 71 is arc-shaped, and a rubber strip is fixed on the contact surface between the second clamping plate 71 and the hydrophone, so that the second clamping plate 71 and the hydrophone are more stably clamped through friction.

[0036] In the embodiment, the lower shell 1 and the upper shell 2 are each provided with a first clamping assembly 6 around the periphery, the first clamping assembly 6 comprises a first clamping plate 61, the first clamping plate 61 is fixed on the upper shell 2 or the lower shell 1 through a damping assembly 8, and the first clamping assemblies 6 provided on the upper shell 2 and the lower shell 1 are used for fixing the hydrophone upward and downward and reducing the upward and downward vibration of the hydrophone caused by external impact.

[0037] The damper of the damping assembly 8 of the first clamping assembly 6 provided on the upper shell 2 is fixedly connected with the first clamping plate 61 at one end and fixedly connected with the upper shell 2 at the other end, and the damper of the damping assembly 8 of the first clamping assembly 6 provided on the lower shell 1 is fixedly connected with the first clamping plate 61 at one end and fixedly connected with the lower shell 1 at the other end.

[0038] As shown in Figure 2 In the embodiment, the outer side of the intermediate metal layer 4 and the outer side of the inner metal layer 5 are provided with multiple heat dissipation fins 9, so as to transfer the heat in the inner metal layer 5 to the intermediate metal layer 4, the intermediate metal layer 4 transfers the heat to the outer metal layer 3, and the heat is dissipated.

[0039] The above examples only illustrate the technical thought of the present application, and cannot limit the protection scope of the present application. Any modification made according to the technical thought of the present application on the basis of the technical scheme falls within the protection scope of the present application.

Claims

1. An electromagnetic interference resistant hydrophone comprising a hydrophone and a housing disposed externally to the hydrophone, characterised in that: The shell comprises an upper shell (2), a lower shell (1), an outer metal layer (3), an intermediate metal layer (4) and an inner metal layer (5), the outer metal layer (3), the intermediate metal layer (4) and the inner metal layer (5) are fixed on the lower shell (1) in turn from outside to inside with the center of the lower shell (1) as the reference, the upper shell (2) is detachably fixed on the top of the outer metal layer (3), the intermediate metal layer (4) and the inner metal layer (5), each of the outer metal layer (3), the intermediate metal layer (4) and the inner metal layer (5) is provided with an acoustic window, the acoustic windows on the three different metal layers are opposite, the acoustic window of the outer metal layer (3) is provided with a first electromagnetic shielding component, the acoustic windows of the intermediate metal layer (4) and the inner metal layer (5) are provided with a second electromagnetic shielding component, the upper shell (2) and the lower shell (1) are each provided with a plurality of first clamping components (6), and the side wall of the inner metal layer (5) is fixed with a plurality of second clamping components (7).

2. The electromagnetic interference resistant hydrophone of claim 1, wherein: The first electromagnetic shielding component comprises an acoustic window, the acoustic window is fixed inside the acoustic window of the outer metal layer (3), and an electrically conductive sealing ring is arranged between the acoustic window and the outer metal layer (3), and the other side of the acoustic window is provided with a first electromagnetic shielding net, and the electrically conductive sealing ring is electrically connected with the first electromagnetic shielding net and the outer metal layer (3) respectively.

3. The electromagnetic interference resistant hydrophone of claim 2, wherein: The acoustic window is made of polyurethane material.

4. The electromagnetic interference resistant hydrophone of claim 1, wherein: The second electromagnetic shielding component comprises a second electromagnetic shielding net.

5. The electromagnetic interference resistant hydrophone of claim 1, wherein: The first clamping component (6) comprises a first clamping plate (61), and the first clamping plate (61) is fixed on the upper shell (2) or the lower shell (1) through a plurality of damping components (8).

6. The electromagnetic interference resistant hydrophone of claim 1, wherein: The second clamping component comprises a second clamping plate (71), and the second clamping plate (71) is fixed on the side wall of the inner metal layer (5) through a plurality of damping components (8).

7. The electromagnetic interference resistant hydrophone of claim 1, wherein: A through hole is formed in the center of the upper shell (2), and a waterproof connector (10) is arranged at the through hole, and an electrically conductive sealing ring is also arranged between the waterproof connector (10) and the through hole.

8. The electromagnetic interference resistant hydrophone of claim 1, wherein: A first circular groove (21) and a second circular groove (22) are formed in the bottom of the upper shell (2), the first circular groove (21) is opposite to the intermediate metal layer (4), the second circular groove (22) is opposite to the inner metal layer (5), electrically conductive sealing rings are fixed inside the first circular groove (21) and the second circular groove (22), and an electrically conductive sealing ring is also arranged on the contact surface of the outer metal layer (3) and the upper shell (2).

9. The electromagnetic interference resistant hydrophone of claim 8, wherein: The heights of the intermediate metal layer (4) and the inner metal layer (5) are higher than the height of the outer metal layer (3) in cooperation with the first circular groove (21) and the second circular groove (22) of the upper shell (2).

10. The electromagnetic interference resistant hydrophone of claim 1, wherein: A plurality of heat dissipation fins (9) are arranged on the outer sides of the intermediate metal layer (4) and the inner metal layer (5).

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