A receiver

Abstract

The present invention provides a receiver, which includes: a receiver body and a shell; the receiver body is arranged inside the shell, and a cavity is formed between the receiver body and the inner wall surface of the shell, and a sound-permeable hole connected to the cavity is opened on the shell; the receiver body includes: a piezoelectric vibration module, which is used to generate a vibration signal by using the inverse piezoelectric effect when excited by an electric signal; and a conduction module, which is used to conduct the vibration signal to the cavity. The piezoelectric vibration module in the receiver body generates a vibration signal when excited by the electric signal, and the conduction module conducts the vibration signal to the cavity between the receiver body and the shell. The sound-permeable hole between the receiver body and the shell connects the cavity with the outside of the receiver, so that the air or water in the cavity can vibrate freely. The problem that the sound-generating principle of the traditional receiver is that a light-weight paper cone or diaphragm vibrates in the air, and the resistance encountered in water is thousands of times greater than that in air, and it cannot be used normally is solved.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a receiver. Background Art

[0002] Underwater communication technology ensures the ability of divers to communicate with others when working underwater. Therefore, underwater communication receivers are important devices for underwater operations, which can convert communication signals into sound signals and be heard by users underwater. However, the sound generation principle of traditional receivers is that a light paper cone or diaphragm vibrates in the air. The resistance in water is thousands of times greater than that in air, so it cannot be used normally. Summary of the invention

[0003] The purpose of the present invention is to provide a receiver to solve the problem that the sound generation principle of the receiver in the prior art is that a light paper cone or diaphragm vibrates in the air, and the resistance encountered in water is thousands of times greater than that in air, so the receiver cannot be used normally.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides a receiver, which includes: a receiver body and a housing;

[0005] The receiver body is arranged inside the shell, and a cavity is formed between the receiver body and the inner wall surface of the shell, and a sound-permeable hole communicating with the cavity is opened on the shell;

[0006] The receiver body comprises:

[0007] Piezoelectric vibration module, used to generate vibration signal by using inverse piezoelectric effect when excited by electrical signal;

[0008] The conduction module is used for conducting the vibration signal to the cavity.

[0009] Optionally, in the receiver, the conduction module comprises:

[0010] An elastic material body forming an accommodating space, wherein the piezoelectric vibration module is arranged in the accommodating space;

[0011] The sealant covers the piezoelectric vibration module, and the sealant seals the accommodating space.

[0012] Optionally, in the receiver, the piezoelectric vibration module includes a first electrode sheet, a piezoelectric sheet and a second electrode sheet which are stacked in sequence.

[0013] Optionally, in the receiver, there are multiple sound-permeable holes, which are evenly arranged around the receiver body.

[0014] Optionally, the receiver, wherein the shell includes a closed top surface and a bottom surface with an opening, the bottom surface is provided with a plurality of protrusions extending from the inner wall of the shell, the protrusions are connected to the outer wall surface of the receiver body, the outer wall surface of the receiver body, the inner wall surface of the shell and two adjacent protrusions are arranged to form a sound-permeable hole.

[0015] Optionally, in the receiver, the elastic material body is made of soft sound damping material.

[0016] Optionally, in the receiver, the first electrode sheet and the second electrode sheet are made of conductive material.

[0017] Optionally, in the receiver, the first electrode sheet and the second electrode sheet are respectively connected to a communication system via wires.

[0018] The beneficial effects of the above technical solution of the present invention are as follows:

[0019] In the above scheme, the piezoelectric vibration module in the receiver body generates a vibration signal when excited by an electrical signal, and the conduction module conducts the vibration signal to the cavity between the receiver body and the housing. The sound-permeable hole between the receiver body and the housing connects the cavity with the outside of the receiver, allowing the air or water in the cavity to vibrate freely. This solves the problem that the sound-generating principle of the traditional receiver is that a light paper cone or diaphragm vibrates in the air, and the resistance encountered in water is thousands of times greater than that in air, and it cannot be used normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A front view of a receiver according to an embodiment of the present invention;

[0021] Figure 2 A bottom view of a receiver according to an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of a multi-physics field finite element simulation analysis result of a receiver according to an embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of a frequency response curve after assembly actually measured for the receiver according to an embodiment of the present invention.

[0024] Explanation of symbols:

[0025] 1- piezoelectric sheet; 2- first electrode sheet; 3- second electrode sheet; 4- elastic material body; 5- sealant; 6- sound-permeable hole; 7- shell; 8- cavity. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The present invention provides a receiver to solve the problem that the sound generation principle of the receiver in the prior art is that a light paper cone or diaphragm vibrates in the air, and the resistance encountered in water is thousands of times greater than that in air, so the receiver cannot be used normally.

[0028] like Figure 1 As shown, an embodiment of the present invention provides a receiver, which includes: a receiver body and a housing 7;

[0029] The receiver body is disposed inside the housing 7, and a cavity 8 is formed between the receiver body and the inner wall of the housing 7. The housing 7 is provided with a sound-permeable hole 6 connected to the cavity 8.

[0030] The receiver body comprises:

[0031] Piezoelectric vibration module, used to generate vibration signal by using inverse piezoelectric effect when excited by electrical signal;

[0032] The conduction module is used to conduct the vibration signal to the cavity 8.

[0033] In this embodiment, the piezoelectric vibration module in the receiver body generates the vibration signal when excited by the electrical signal, and the conduction module conducts the vibration signal to the cavity 8 between the receiver body and the housing 7. The sound-permeable hole 6 between the receiver body and the housing 7 connects the cavity 8 with the outside of the receiver, so that the air or water in the cavity 8 can vibrate freely. This solves the problem that the sound-generating principle of the traditional receiver is that a light-weight paper cone or diaphragm vibrates in the air, and the resistance encountered in water is thousands of times greater than that in air, so it cannot be used normally.

[0034] Optionally, in the receiver, the conduction module comprises:

[0035] An elastic material body 4 forming an accommodating space, wherein the piezoelectric vibration module is arranged in the accommodating space;

[0036] The sealant 5 covers the piezoelectric vibration module, and the sealant 5 seals the accommodating space.

[0037] In this embodiment, the elastic material body 4 and the sealant 5 form a closed accommodating space in which the piezoelectric vibration module is placed, thereby preventing the piezoelectric vibration module from contacting the external water environment and affecting the normal operation of the receiver.

[0038] Optionally, in the receiver, the piezoelectric vibration module includes a first electrode sheet 2, a piezoelectric sheet 1 and a second electrode sheet 3 which are stacked in sequence.

[0039] In this embodiment, the piezoelectric sheet 1 is excited by an electrical signal between the first electrode sheet 2 and the second electrode sheet 3. Since the piezoelectric sheet 1 is made of piezoelectric material, it generates mechanical vibrations by its own inverse piezoelectric effect. Compared with the receiver in the prior art that vibrates and sounds in the air through a light paper cone or diaphragm, the receiver that vibrates and sounds through solids is more suitable for use in underwater environments and has a better vibration sound effect.

[0040] like Figure 2 As shown, optionally, in the receiver, there are multiple sound-permeable holes 6 that are evenly arranged around the receiver body.

[0041] Optionally, the receiver, wherein the shell 7 includes a closed top surface and a bottom surface with an opening, the bottom surface is provided with a plurality of protrusions extending from the inner wall of the shell 7, the protrusions are connected to the outer wall surface of the receiver body, the outer wall surface of the receiver body, the inner wall surface of the shell 7 and two adjacent protrusions are arranged to form a sound-permeable hole 6.

[0042] In this embodiment, the sound-permeable holes 6 are evenly arranged around the receiver body, which is conducive to the uniform transmission of sound signals. The structure of the cavity 8 allows the mechanical vibration of the piezoelectric sheet 1 to be unimpeded on the upper side of the first electrode sheet 2. The sound-permeable holes 6 connect the cavity 8 with the outside of the receiver. When the receiver body vibrates, the sound-permeable holes 6 can allow the water or air inside the cavity 8 to vibrate freely.

[0043] Optionally, in the receiver, the elastic material body 4 is made of soft sound damping material.

[0044] In this embodiment, the elastic material body 4 transmits the vibration signal of the piezoelectric sheet 1 to the external space of the receiver. The sealant 5 is located above the first electrode sheet 2 and forms a closed space with the elastic material body 4 to prevent the piezoelectric sheet 1, the first electrode sheet 2 and the second electrode sheet 3 from contacting the external water environment.

[0045] It should be noted that the piezoelectric sheet 1 in the embodiment of the present invention is made of piezoelectric ceramic material, the elastic material body 4 is made of seawater-proof rubber TPU, the sealant 5 is made of special glue for waterproof potting, and the shell 7 is made of plastic. Embodiments using other materials that can achieve the same effect are also within the protection scope of the patent of this invention.

[0046] like Figure 1 , Figure 3 and Figure 4 As shown, optionally, in the receiver, the first electrode sheet 2 and the second electrode sheet 3 are made of conductive material.

[0047] Optionally, in the receiver, the first electrode sheet 2 and the second electrode sheet 3 are respectively connected to a communication system via wires.

[0048] In this embodiment, the first electrode sheet 2 and the second electrode sheet 3 are respectively connected to the communication system through wires to generate electrical signals to stimulate the piezoelectric sheet 1. The piezoelectric sheet 1 generates mechanical vibrations, thereby causing the receiver body to vibrate mechanically, and the vibrations are transmitted to the outside of the receiver through the elastic material body 4 to form sounds, which are then received by the user, completing the receiving function.

[0049] It should be noted that the embodiment of the present invention uses solid piezoelectric materials to vibrate and generate sound. Since the bulk modulus of solid piezoelectric materials is generally on the order of hundreds of GPa, the vibration and sound generation of the embodiment of the present invention will not be affected by the external liquid pressure in a water environment of tens of meters deep. The receiver body composed of the sealant 5, the first electrode sheet 2, the piezoelectric sheet 1, the second electrode sheet 3, and the elastic material body 4 is a resonant system as a whole. By designing the thickness and diameter of the first electrode sheet 2, the piezoelectric sheet 1, and the second electrode sheet 3, the main mode resonant frequency of the resonant system is designed to be around 2kHz, thereby achieving a high conversion rate of the microphone to the voice band signal. Figure 3 The figure is a schematic diagram of the multi-physics field finite element simulation analysis results of the receiver according to the embodiment of the present invention. The receiver has two resonance peaks at 1.9 kHz and 17 kHz on a standard artificial ear. Figure 3 The sub-figure in the figure shows the distribution of modes, which shows that 1.9kHz is the main mode and 17kHz is the transverse third-order mode.

[0050] Figure 4This is a schematic diagram of the assembled frequency response curve of the receiver actually measured in the embodiment of the present invention. In the frequency band below 1.9kHz, the sensitivity is guaranteed by the fit between the underwater communication receiver and the artificial ear to prevent sound spillover. The measured results show that in the frequency band between 100Hz and 4kHz, the sensitivity of the underwater communication receiver can reach 85dB / mW, which ensures its high conversion rate in the voice band; the sensitivity in the other frequency bands is lower, which has a better suppression of noise in the environment.

[0051] It should be noted here that the above-mentioned device provided in the embodiment of the present invention can implement all the method steps implemented in the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects that are the same as the method embodiment in this embodiment will not be described in detail here.

[0052] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A receiver, characterized in that: include: Receiver body and housing (7); The receiver body is arranged inside the shell (7), and a cavity (8) is formed between the receiver body and the inner wall surface of the shell (7), and a sound-permeable hole (6) communicating with the cavity (8) is provided on the shell (7); the shell (7) comprises a closed top surface and a bottom surface with an opening, and a plurality of protrusions extending from the inner wall of the shell (7) are arranged on the bottom surface, and the protrusions are connected to the outer wall surface of the receiver body, and the outer wall surface of the receiver body, the inner wall surface of the shell (7) and two adjacent protrusions surround and form one sound-permeable hole (6); The receiver body comprises: A piezoelectric vibration module is used to generate a vibration signal by using the inverse piezoelectric effect when stimulated by an electrical signal; the piezoelectric vibration module comprises a first electrode sheet (2), a piezoelectric sheet (1) and a second electrode sheet (3) which are stacked in sequence; A conduction module is used for conducting the vibration signal to the cavity (8).

2. The receiver according to claim 1, characterized in that The conduction module comprises: An elastic material body (4) forming an accommodating space, wherein the piezoelectric vibration module is arranged in the accommodating space; The sealant (5) covers the piezoelectric vibration module, and the sealant (5) seals the accommodating space.

3. The receiver according to claim 1, characterized in that The sound-transmitting holes (6) are multiple and are evenly arranged around the receiver body.

4. The receiver according to claim 2, characterized in that: The elastic material body (4) is made of soft sound damping material.

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

6. The receiver according to claim 1, characterized in that The first electrode sheet (2) and the second electrode sheet (3) are respectively connected to a communication system via wires.

Images