Receiver

Abstract

The utility model provides a receiver, comprising a housing provided with an accommodating space; the receiver main body is arranged in the accommodating space, a cavity is formed between the receiver main body and the inner wall surface of the shell, and a sound transmission hole communicated with the cavity is formed in the shell; wherein the receiver main body comprises a piezoelectric vibration assembly and a conduction sealing assembly used for sealing the piezoelectric vibration assembly, the piezoelectric vibration assembly comprises a first electrode plate, a piezoelectric plate and a second electrode plate which are sequentially stacked from bottom to top, the conduction sealing assembly comprises an elastic material body, the size of the first electrode plate is smaller than that of the piezoelectric plate, and the size of the second electrode plate is smaller than that of the piezoelectric plate. The part, exceeding the first electrode plate, of the piezoelectric plate is in contact with the elastic material body, so that sound waves generated when the piezoelectric plate vibrates can be directly transmitted to a conduction part in the conduction sealing assembly and then are conducted to an external space, the sound production intensity of the receiver in water is enhanced, and the underwater communication quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of communications, and particularly relates to a receiver. Background Art

[0002] Underwater communication technology ensures the communication ability of divers during underwater operations. The underwater communication receiver is an important device in the field of underwater communication, which realizes the conversion of communication signals into sounds underwater and allows the user to hear them. In the underwater environment, the acoustic environment is relatively complex, and sounds such as bubble sounds, underwater environmental background noise, and noise generated by the divers' own actions will all affect the receiving quality of divers during underwater communication. Therefore, how to improve the performance of the underwater receiver, so that it can emit sound signals with a higher sound pressure level under a certain power, and then improve the communication quality of divers, has become an urgent problem to be solved in underwater communication technology. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a receiver, which is used to solve the problem that the underwater receiver in the prior art has low receiving quality in the underwater environment with a complex acoustic environment, affecting the call quality of divers.

[0004] In order to solve the above technical problems, an embodiment of the utility model provides a receiver, which includes: [[ID=;18]]

[0005] A housing, provided with an accommodation space;

[0006] A receiver main body, arranged in the accommodation space, and a cavity is formed between the receiver main body and the inner wall surface of the housing. The housing is provided with a sound transmission hole communicating with the cavity;

[0007] Wherein, the receiver main body includes a piezoelectric vibration component and a conduction sealing component for sealing the piezoelectric vibration component:

[0008] The piezoelectric vibration component includes a first electrode plate, a piezoelectric sheet and a second electrode plate which are stacked in sequence from bottom to top. The conduction sealing component includes an elastic material body. The size of the first electrode plate is smaller than that of the piezoelectric sheet, and the part of the piezoelectric sheet exceeding the first electrode plate is in contact with the elastic material body.

[0009] Optionally, in the receiver, the orthographic projection of the second electrode plate on the plane where the piezoelectric sheet is located covers the piezoelectric sheet, and the orthographic projection of the piezoelectric sheet on the plane where the first electrode plate is located covers the first electrode plate.

[0010] Optionally, in the receiver, the conduction sealing component further includes a sealant layer;

[0011] Among them, the sealant layer is disposed on the top surface of the elastic material body, and combines with the elastic material body to form a closed space, and the piezoelectric vibration assembly is disposed in the closed space.

[0012] Optionally, for the receiver, inside the closed space, the elastic material body includes a plurality of stepped surfaces, respectively corresponding to supporting the first electrode sheet, the piezoelectric sheet and the second electrode sheet.

[0013] Optionally, for the receiver, the thickness of the part of the elastic material body covered by the positive projection of the first electrode sheet in the plane where the elastic material body is located is less than 1 mm.

[0014] Optionally, for the receiver, the thickness of the sealant layer is less than 0.5 mm.

[0015] Optionally, for the receiver, the elastic material body is made of a soft acoustic damping material.

[0016] Optionally, for the receiver, the sealant layer is made of a sealing material with a certain adhesiveness.

[0017] Optionally, for the receiver, the first electrode sheet and the second electrode sheet are made of a conductive material.

[0018] The beneficial effects of the above technical solutions of the present utility model are as follows:

[0019] In the above solution, the conduction seal assembly in the receiver main body disposed in the accommodation space of the housing seals the piezoelectric vibration assembly. The size of the first electrode sheet in the piezoelectric vibration assembly is smaller than that of the piezoelectric sheet, and the part of the piezoelectric sheet exceeding the first electrode sheet is in direct contact with the elastic material body of the conduction seal assembly, so that the sound wave generated when the piezoelectric sheet vibrates can be directly transmitted to the conduction part in the conduction seal assembly, and then transmitted to the external space, enhancing the sound emission intensity of the receiver in water and improving the underwater communication quality. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the receiver according to an embodiment of the present utility model;

[0021] Figure 2 It is one of the schematic diagrams of the multi-physics field finite element simulation analysis results of the receiver according to an embodiment of the present utility model;

[0022] Figure 3 It is another schematic diagram of the multi-physics field finite element simulation analysis results of the receiver according to an embodiment of the present utility model;

[0023] Figure 4 It is one of the frequency response curves of the receiver according to an embodiment of the present utility model;

[0024] Figure 5 This is the second frequency response curve of the receiver described in the embodiments of the present invention;

[0025] Figure 6 This is the third frequency response curve of the receiver described in the embodiments of the present invention.

[0026] Symbol description:

[0027] 1 - Piezoelectric sheet; 2 - First electrode sheet; 3 - Second electrode sheet; 4 - Elastic material body; 5 - Sealing glue layer; 6 - Sound transmission hole; 7 - Outer shell; 8 - Cavity. Specific implementation manner

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Aiming at the problem that the underwater receiver in the prior art has low receiving quality in the underwater environment with complex acoustic environment and affects the call quality of divers, the present invention provides a receiver.

[0030] As Figure 1 shown, the embodiments of the present invention provide a receiver, which includes:

[0031] An outer shell 7 provided with an accommodating space;

[0032] A receiver main body disposed in the accommodating space, and a cavity 8 is formed between the receiver main body and the inner wall surface of the outer shell 7, and a sound transmission hole 6 communicating with the cavity 8 is opened on the outer shell 7;

[0033] Among them, the receiver main body includes a piezoelectric vibration assembly and a conduction sealing assembly for sealing the piezoelectric vibration assembly:

[0034] The piezoelectric vibration assembly includes a first electrode sheet 2, a piezoelectric sheet 1, and a second electrode sheet 3 stacked in sequence from bottom to top. The conduction sealing assembly includes an elastic material body 4. The size of the first electrode sheet 2 is smaller than that of the piezoelectric sheet 1, and the part of the piezoelectric sheet 1 exceeding the first electrode sheet 2 contacts the elastic material body 4.

[0035] In this embodiment, the conduction and sealing assembly in the receiver body disposed in the accommodation space of the housing 7 seals the piezoelectric vibration assembly. The size of the first electrode sheet 2 in the piezoelectric vibration assembly is smaller than that of the piezoelectric sheet 1. The portion of the piezoelectric sheet 1 extending beyond the first electrode sheet 2 is in direct contact with the elastic material body 4 of the conduction and sealing assembly, so that the sound wave generated when the piezoelectric sheet 1 vibrates can be directly transmitted to the conduction part in the conduction and sealing assembly, and then conducted to the external space, enhancing the sound generation intensity of the receiver in water and improving the underwater communication quality.

[0036] It should be noted that the first electrode sheet 2 and the second electrode sheet 3 are respectively connected to the communication system through wire wiring. When the receiver works, an alternating current signal is conducted to the upper and lower ends of the piezoelectric sheet 1. The piezoelectric sheet 1 generates mechanical vibration by relying on its own inverse piezoelectric effect under the excitation of the alternating current signal. The cavity 8 formed between the housing 7 and the receiver body is connected to the outside of the receiver through the sound transmission hole 6. The cavity 8 and the sound transmission hole 6 are used to balance the pressure difference between the upper and lower spaces of the piezoelectric sheet 1 when the piezoelectric sheet 1 vibrates. The mechanical vibration of the receiver body is conducted to the outside of the receiver through the conduction part of the conduction and sealing assembly to form sound, which is then received by the user to complete the receiving function.

[0037] Optionally, in the receiver, the positive projection of the second electrode sheet 3 on the plane where the piezoelectric sheet 1 is located covers the piezoelectric sheet 1, and the positive projection of the piezoelectric sheet 1 on the plane where the first electrode sheet 2 is located covers the first electrode sheet 2.

[0038] In this embodiment, as Figure 1 shown, the positive projection of the second electrode sheet 3 on the plane where the piezoelectric sheet 1 is located covers the piezoelectric sheet 1, the positive projection of the piezoelectric sheet 1 on the plane where the first electrode sheet 2 is located covers the first electrode sheet 2, and the first electrode sheet 2, the piezoelectric sheet 1 and the second electrode sheet 3 are coaxially arranged.

[0039] Optionally, in the receiver, the conduction and sealing assembly further includes a sealant layer 5;

[0040] Wherein, the sealant layer 5 is disposed on the top surface of the elastic material body 4 and forms a closed space in combination with the elastic material body 4, and the piezoelectric vibration assembly is disposed in the closed space.

[0041] In this embodiment, the size of the first electrode sheet 2 is smaller than that of the piezoelectric sheet 1, such that there is a directly contacting portion between the piezoelectric sheet 1 and the elastic material body 4. When the piezoelectric sheet 1 vibrates, sound waves can directly propagate into the elastic material body 4 and then be conducted to the external space of the receiver; the size of the second electrode sheet 3 is larger than that of the piezoelectric sheet 1, such that the piezoelectric sheet 1 does not directly contact the sealant layer 5, thereby preventing the piezoelectric sheet 1, the first electrode sheet 2, and the second electrode sheet 3 from directly contacting the liquid, and thus enabling the receiver to be normally powered on and generate sound in a liquid environment.

[0042] It should be noted that the sealant layer 5, the first electrode sheet 2, the piezoelectric sheet 1, the second electrode sheet 3, and the elastic material body 4 together form an acoustic resonance system. By designing the thicknesses and diameters of the first electrode sheet 2, the piezoelectric sheet 1, and the second electrode sheet 3, the main mode resonance frequency of this resonance system is designed to be around 1.5 kHz, thereby achieving a high conversion rate of the microphone for voice band signals.

[0043] Optionally, for the receiver, inside the enclosed space, the elastic material body 4 includes a plurality of stepped surfaces that respectively support the first electrode sheet 2, the piezoelectric sheet 1, and the second electrode sheet 3.

[0044] In this embodiment, as Figure 1 shown, in order to adapt to the situation where the size of the first electrode sheet 2 is smaller than that of the piezoelectric sheet 1 and the size of the second electrode sheet 3 is larger than that of the piezoelectric sheet 1, a plurality of stepped surfaces are provided on the elastic material body 4 to respectively support the first electrode sheet 2, the piezoelectric sheet 1, and the second electrode sheet 3, which can not only make there be a directly contacting portion between the piezoelectric sheet 1 and the elastic material body 4, but also avoid the piezoelectric sheet 1 directly contacting the sealant layer 5, thereby preventing the piezoelectric sheet 1, the first electrode sheet 2, and the second electrode sheet 3 from directly contacting the liquid, and thus enabling the receiver to be normally powered on and generate sound in a liquid environment.

[0045] Optionally, for the receiver, the thickness of the portion of the elastic material body 4 covered by the positive projection of the first electrode sheet 2 on the plane where the elastic material body 4 is located is less than 1 mm.

[0046] In this embodiment, when the thickness of the elastic material body 4 is reduced from 3.5 mm in the prior art to 1 mm and the thickness of the sealant layer 5 remains unchanged at 3 mm in the prior art, the multi-physics field finite element simulation analysis results are as Figure 2 shown: the sensitivity of the receiver at 1 kHz increases from 97 dB / mW to 109 dB / mW.

[0047] Optionally, for the receiver, the thickness of the sealant layer 5 is less than 0.5 mm.

[0048] In this embodiment, the thickness of the sealant layer 5 is reduced from 3 mm in the prior art to 0.5 mm. When the thickness of the elastic material body 4 is 1 mm, the multi-physics finite element simulation analysis results are as Figure 3 shown: the 1 kHz sensitivity of the receiver increases from 109 dB / mW to 115 dB / mW. Figure 4 , Figure 5 , Figure 6 is the frequency response curve of the assembled underwater communication receiver actually measured in the embodiment of the present invention. Figure 4 is: when the thickness of the elastic material body 4 is 3.5 mm and the thickness of the sealant layer 5 is 3 mm, the measured 1 kHz sensitivity of the receiver is 87 dB / mW. Figure 5 is: when the thickness of the elastic material body 4 is 1 mm and the thickness of the sealant layer 5 is 3 mm, the measured 1 kHz sensitivity of the receiver is 102 dB / mW. Figure 6 is: when the thickness of the elastic material body 4 is 1 mm and the thickness of the sealant layer 5 is 1 mm, the measured 1 kHz sensitivity of the receiver is 110 dB / mW. It can be seen that through the receiver of the present invention, the measured sensitivity result has increased by 23 dB, which greatly improves its communication ability in the underwater noise environment.

[0049] Optionally, for the receiver, the elastic material body 4 is made of a soft acoustic damping material.

[0050] In this embodiment, the elastic material body 4 is made of a soft acoustic damping material and can be made of seawater-resistant rubber TPU.

[0051] Optionally, for the receiver, the sealant layer 5 is made of a sealing material with a certain adhesiveness.

[0052] In this embodiment, the sealant layer 5 is made of a sealing material with a certain adhesiveness and can be a special waterproof potting adhesive.

[0053] Optionally, for the receiver, the first electrode plate 2 and the second electrode plate 3 are made of a conductive material.

[0054] In this embodiment, the first electrode plate 2 and the second electrode plate 3 are made of a conductive material, and the piezoelectric sheet 1 is made of a piezoelectric material, which can be piezoelectric ceramics.

[0055] Obviously, those skilled in the art can make various modifications and variations to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model also intends to include these modifications and variations.

Claims

1. A receiver, characterized in that, Comprising: A housing (7) provided with a receiving space; A receiver body disposed within the receiving space, and a cavity (8) is formed between the receiver body and the inner wall surface of the housing (7), and a sound transmission hole (6) communicating with the cavity (8) is formed on the housing (7); Wherein, the receiver body includes a piezoelectric vibration component and a conduction sealing component for sealing the piezoelectric vibration component: The piezoelectric vibration component includes a first electrode plate (2), a piezoelectric sheet (1), and a second electrode plate (3) stacked in sequence from bottom to top, the conduction sealing component includes an elastic material body (4), the size of the first electrode plate (2) is smaller than that of the piezoelectric sheet (1), and the part of the piezoelectric sheet (1) exceeding the first electrode plate (2) contacts the elastic material body (4).

2. The receiver according to claim 1, characterized in that, The positive projection of the second electrode plate (3) on the plane where the piezoelectric sheet (1) is located covers the piezoelectric sheet (1), and the positive projection of the piezoelectric sheet (1) on the plane where the first electrode plate (2) is located covers the first electrode plate (2).

3. The receiver according to claim 1, characterized in that, The conduction sealing component further includes a sealant layer (5); Wherein, the sealant layer (5) is disposed on the top surface of the elastic material body (4) and forms a closed space in combination with the elastic material body (4), and the piezoelectric vibration component is disposed within the closed space.

4. The receiver according to claim 3, characterized in that, Inside the closed space, the elastic material body (4) includes a plurality of stepped surfaces respectively corresponding to supporting the first electrode plate (2), the piezoelectric sheet (1), and the second electrode plate (3).

5. The receiver according to claim 3, characterized in that, The thickness of the part of the elastic material body (4) covered by the positive projection of the first electrode plate (2) on the plane where the elastic material body (4) is located is less than 1 mm.

6. The receiver according to claim 3, wherein, The thickness of the sealant layer (5) is less than 0.5 mm.

7. The receiver according to claim 3, characterized in that, The elastic material body (4) is made of a soft sound damping material.

8. The receiver according to claim 3, characterized in that, The sealant layer (5) is made of a sealing material with certain adhesiveness.

9. The receiver according to claim 1, characterized in that, The first electrode plate (2) and the second electrode plate (3) are made of a conductive material.

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