CN216700292U - Microphone signal amplifying device and microphone - Google Patents
Microphone signal amplifying device and microphone Download PDFInfo
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- CN216700292U CN216700292U CN202123143154.0U CN202123143154U CN216700292U CN 216700292 U CN216700292 U CN 216700292U CN 202123143154 U CN202123143154 U CN 202123143154U CN 216700292 U CN216700292 U CN 216700292U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
A microphone signal amplification device and a microphone relate to the technical field of electroacoustic, and comprise: the microphone comprises a piezoelectric module, a power supply module, a control switch and an amplification module, wherein the piezoelectric module is used for generating vibration based on external sound and/or external vibration, the generated vibration is converted into voltage to charge the power supply module, the control switch is used for connecting or disconnecting the power supply module and the amplification module, the power supply module is used for storing electric energy charged by the piezoelectric module, and the power supply module supplies power to the amplification module when the control switch controls the power supply module and the amplification module to be connected, so that the amplification module amplifies sound signals sent by the microphone. The microphone signal amplification device and the microphone can realize self-power supply inside, and the cost of amplifying the volume of the microphone is reduced.
Description
Technical Field
The embodiment of the application relates to the technical field of electroacoustic, in particular to a microphone signal amplifying device and a microphone.
Background
Moving coil microphones are good quality and soft but have the obvious disadvantage of low sensitivity, typically-68 dB, which is more than 2 times lower than that of condenser microphones, and so have limitations in live broadcast applications.
In the prior art, in order to improve the sensitivity of the moving coil microphone and enlarge the sound production of the microphone, the amplifier is added to the moving coil microphone, and the power supply battery for supplying power to the amplifier is installed, so that the cost is increased, the volume is increased, the battery needs to be replaced regularly, and the inconvenience in use and operation of a user is caused.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a microphone signal amplification device, which is a microphone, and can realize power supply for an amplifier on the premise of not increasing the cost and the volume, thereby improving the volume of the microphone.
An aspect of an embodiment of the present application provides a microphone signal amplifying device, including:
the device comprises a piezoelectric module, a power supply module, a control switch and an amplification module; the piezoelectric module is connected with the power supply module, and the amplifying module is connected with a microphone head of the microphone; the piezoelectric module is used for generating vibration based on external sound and/or external vibration and converting the generated vibration into direct-current voltage to charge the power supply module; the control switch is used for connecting or disconnecting the power supply module and the amplification module; the power supply module is used for storing electric energy charged by the piezoelectric module and supplying power to the amplification module when the control switch controls the power supply module to be communicated with the amplification module, so that the amplification module amplifies a sound signal emitted by the microphone.
Further, the microphone signal amplifying device further includes: the constant current module comprises a voltage stabilizing module and a constant current module; the voltage stabilizing module is connected with the piezoelectric module, the power supply module and the constant current module, and the constant current module is connected with the voltage stabilizing module and the power supply module; the voltage stabilizing module is used for stabilizing the voltage value of the direct current voltage output by the piezoelectric module within a preset voltage range, and the constant current module is used for stabilizing the current value of the direct current voltage output by the piezoelectric module within a preset current range.
Further, the piezoelectric module comprises a PVDF film, and an area of the PVDF film is larger than a preset area.
Further, the power supply module comprises a super capacitor.
Further, the amplifying module includes a field effect transistor.
Further, the voltage stabilizing module comprises a voltage stabilizing diode, and the constant current module comprises a constant current diode.
Another aspect of the embodiments of the present application provides a microphone, including:
wheat head, wheat barrel and hand-held part; the microphone signal amplifying device is arranged in the microphone barrel, and a microphone is arranged in the microphone head; the microphone signal amplifying device comprises a microphone signal amplifying device, a power supply module and an amplifying module, wherein the microphone signal amplifying device comprises a microphone, the power supply module is used for supplying power to the microphone signal amplifying device, the piezoelectric module in the microphone signal amplifying device is used for generating vibration based on external sound and/or external vibration and converting the generated vibration into direct-current voltage to charge the power supply module in the microphone signal amplifying device, the power supply module is used for storing electric energy charged by the piezoelectric module and supplying power to the amplifying module when the power supply module is communicated with the amplifying module in the microphone signal amplifying device, and the amplifying module is connected with the microphone and is used for amplifying a sound signal output by the microphone.
Furthermore, the piezoelectric module in the microphone signal amplifying device comprises a PVDF film, the wall of the microphone barrel comprises an inner wall, the PVDF film is fixedly arranged on the inner wall, and the area of the PVDF film is the same as that of the inner wall.
Further, a control switch and a power supply module in the microphone signal amplifying device are arranged in the handheld portion, the power supply module comprises a super capacitor, and an operation button of the control switch is arranged on the surface of the handheld portion.
Furthermore, a printed circuit board is arranged at the connecting part of the microphone and the handheld part, and a lead of the microphone, a lead of the control switch and a lead of the super capacitor are connected to the printed circuit board.
According to the embodiments of the present application, the microphone signal amplifying device includes a piezoelectric module, a power supply module, a control switch and an amplifying module, the piezoelectric module generates vibration based on external sound and/or external vibration, and converts the generated vibration into a direct current voltage to charge the power supply module, the power supply module can store the charged electric energy, and supply power to the amplifying module when the control switch controls the power supply module and the amplifying module to be communicated, so that the amplifying module amplifies the sound signal emitted by the microphone head, thereby automatically charging the amplifying module in the microphone signal amplifying device, without additionally supplying power to a charging battery, thereby omitting the operation of replacing the charging battery, avoiding the inconvenience of user operation, and simultaneously reducing the cost of amplifying the microphone sound.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a microphone signal amplifying device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a microphone signal amplifying device according to another embodiment of the present application;
fig. 3 is a schematic circuit diagram of a microphone signal amplifying device according to an embodiment of the present disclosure;
fig. 4 is a front view of a microphone provided in an embodiment of the present application;
fig. 5 is a cross-sectional view of a microphone according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the indicated orientations and positional relationships based on the drawings for ease of description and simplicity of description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly and include, for example, fixed or removable connections or integral parts; the connection can be mechanical connection, electrical connection or communication connection; either directly or indirectly through intervening media, either internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. The technical solution of the present application will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a microphone signal amplifying device according to an embodiment of the present disclosure. The microphone signal amplifying device can be applied to a moving coil microphone and also can be applied to a capacitance microphone, and is not limited by the type of the microphone, and the microphone signal amplifying device mainly comprises:
the piezoelectric module 10, the power supply module 20, the control switch 30 and the amplifying module 40;
the piezoelectric module 10 is connected with the power supply module 20, and the amplifying module 40 is connected with a microphone head;
the control switch 30 is used for connecting the power supply module 20 and the amplification module 40, or disconnecting the connected power supply module 20 and the amplification module 40;
specifically, when the user turns on the control switch 30, the power supply module 20 is connected to the amplifying module 40, and when the user turns off the control switch 30, the power supply module 20 is disconnected from the amplifying module 40.
The piezoelectric module 10 is configured to generate vibration based on external sound and/or external vibration, and convert the generated vibration into a dc voltage to charge the power supply module 20;
when sound exists around the microphone signal amplifying device or vibration occurs, the piezoelectric module 10 generates vibration accordingly, and converts the generated vibration into a direct current voltage, and the direct current voltage is input to the power supply module 20 connected with the power supply module to charge the power supply module 20.
The power supply module 20 is used for storing the electric energy charged by the piezoelectric module 10 and supplying power to the amplifying module 40 when the control switch 30 controls the electric module 20 and the amplifying module 40 to be communicated, so that the amplifying module 40 amplifies the sound signal emitted by the microphone.
The microphone signal amplification device that this embodiment provided includes the piezoelectricity module, power module, control switch and amplification module, the piezoelectricity module produces the vibration based on outside sound and/or outside vibration, and convert the vibration that produces to direct current voltage and charge for power module, power module can store the electric energy that charges, and for amplifying the module power supply when control switch control power module and amplification module intercommunication, make the sound signal that the microphone's miaow head sent of amplification module amplification, thereby realize charging for amplification module in microphone signal amplification device inside automatically, need not to add the battery power supply of charging in addition, the operation of changing rechargeable battery has also been saved, the inconvenience of user operation has been avoided, reduce the cost of amplifying the microphone sound simultaneously.
Referring to fig. 2, in another embodiment, the microphone signal amplifying device further includes: a voltage stabilizing module 50 and a constant current module 60;
the voltage stabilizing module 50 is connected with the piezoelectric module, the power supply module and the constant current module 60, and the constant current module 60 is connected with the voltage stabilizing module 50 and the power supply module;
the voltage stabilizing module 50 is configured to stabilize a voltage value of the dc voltage output by the piezoelectric module within a preset voltage range, and the constant current module 60 is configured to stabilize a current value of the dc voltage output by the piezoelectric module within a preset current range.
Specifically, the piezoelectric module 10 includes a PVDF (polyvinylidene fluoride) film having an area larger than a predetermined area, and the PVDF film is a piezoelectric material and generates vibration and voltage under the action of external sound pressure and an external vibration source. The PVDF film in this embodiment is preferably 0.2 mm thick to further improve the sensitivity of sensing sound and vibration. The piezoelectric property of the PVDF film is adopted to generate electric energy, additional power supply is not needed, and energy consumption and cost are reduced. The PVDF film in the embodiment has a large area, and can convert sound waves near the microphone and vibration generated by the handheld microphone into electric energy to be stored in the super capacitor.
The power supply module 20 includes a super capacitor (also called electrochemical capacitor), which is a power source with special performance between a conventional capacitor and a battery. The super capacitor is high in charging speed and belongs to the class of second rush.
The amplifying block 40 includes a Field Effect Transistor (FET). The FET is a micro-power consumption element, the power consumption is in microampere level, and the electric energy is greatly saved.
The voltage stabilization module 50 includes a voltage stabilization diode, and the constant current module 60 includes a constant current diode.
The circuit structure schematic diagram of the microphone signal amplifying device is shown in fig. 3, wherein C1 is a super capacitor, and the model can be CHV-2R 7607R-TW; d1 is a voltage stabilizing diode, the model can be 1N4728, and the low-power-consumption element can save electric energy; d2 is a constant current diode, and the model can be 2DH 7; s1 is a control switch; MIC is microphone and impedance may be 600 ohms.
The circuit principle shown in fig. 3 is as follows:
the PVDF film is subjected to external sound and/or vibration to generate vibration, the vibration is converted into direct-current voltage to be output, the direct-current voltage is stabilized through a voltage stabilizing diode D1, the output voltage of the PVDF does not exceed 3.3V, the super capacitor C1 is prevented from being broken down by overhigh voltage, the constant current of the current is controlled through a constant current diode D2, the super capacitor C1 is charged through a diode D3 (the model is 1N4007), and 2.7v of direct-current voltage can be stored inside the super capacitor C1, so that the processes from external sound, vibration to power generation and super capacitor energy storage are completed.
Further, switch S1 is closed and supercapacitor C1 powers the amplifier FET through bias resistor R1. When a user speaks or sings through the microphone, a sound signal collected by the microphone MIC enters the FET through the resistor R2, the FET amplifies the signal and outputs the amplified signal from the OUT end through the capacitor C4, and the process of amplifying and outputting the sound signal picked up by the microphone is achieved.
Referring to fig. 4 and 5, the present embodiment also provides a microphone including:
a head 100, a barrel 200 and a hand-held part 300;
the connection structure, connection process, etc. of the wheat head 100, the microphone 200 and the handheld portion 300 are the same as those of the microphone connection technology in the prior art, and are not described herein again.
The microphone signal amplifying device as described in the previous embodiment is arranged in the microphone barrel 200, the microphone head 101 is arranged in the microphone head 100, and the microphone head 101 is the microphone MIC in the previous embodiment;
the piezoelectric module 10 in the microphone signal amplifying device shown in fig. 1 is configured to generate vibration based on external sound and/or external vibration, and convert the generated vibration into a direct current voltage to charge the power supply module 20 in the microphone signal amplifying device shown in fig. 1, the power supply module 20 is configured to store electric energy charged by the piezoelectric module 20 and supply power to the amplifying module 40 when communicating with the amplifying module 40 in the microphone signal amplifying device, the control switch 30 in the microphone signal amplifying device is configured to supply power to the power supply module 20 and the amplifying module 40, and the amplifying module 40 is connected to the microphone 101 and is configured to amplify a sound signal output by the microphone 101. Further, the piezoelectric module 10 in the microphone signal amplifying device comprises a PVDF film 11, the wall of the microphone 200 comprises an outer protective cover 201 and an inner wall 202, and the PVDF film 11 is fixedly arranged on the inner wall 202. The area of the PVDF film 11 is the same as that of the inner wall 202, the PVDF film 11 is flatly paved on the inner side of the inner wall 202, and the PVDF film with a larger area can more effectively convert sound waves near a microphone and vibration generated by a handheld microphone into electric energy to be stored in the super capacitor.
The outer shield 201 is disposed at the outermost layer of the microphone 200, and mainly protects the microphone 200 from being damaged and does not form damping due to external sound.
Further, the control switch 30 and the power supply module 20 in the microphone signal amplifying device shown in fig. 1 are disposed in the handheld portion 300, the power supply module 20 includes a super capacitor 21, the control switch 30 includes a manipulation button 31, and the manipulation button 31 is disposed on a surface of the handheld portion 300 for operation by a user. The user opens the control switch 30 by sliding or pressing the manipulation button 31, the power supply module 20 communicates with the amplification module 40, the user closes the control switch 30 by resetting the manipulation button 31, and the power supply module 20 is disconnected from the amplification module 40.
A Printed Circuit Board (PCB) 203 is provided at a connection portion between the microphone 200 and the hand-held portion 300, and the capacitor, the resistor, the diode, and the FET shown in fig. 3 are soldered to the PCB 203. The leads 102 of the microphone 101, the leads 32 of the control switch 30 and the leads 22 of the supercapacitor 21 are all connected to the PCB board 203.
Further, the head 100 further includes a microphone shield 103, the microphone shield 103 is disposed on the outermost layer of the head 100, is usually net-shaped and has a certain hardness, is usually made of metal, and is used for protecting the head 101 inside the head 100 and preventing air flow, such as wind.
In order to extract the direct-current voltage generated by the PVDF film 11, metal coatings are added on two surfaces of the PVDF film 11 to form positive and negative 2 electrodes, and a lead (not shown in figures 4 and 5) of each electrode is directly connected to the super capacitor 21 to charge the super capacitor 21.
The inner wall 202 of the wheat barrel 200 is a main body supporting structure of the wheat barrel 200 and is made of ABS plastic (acrylonitrile-butadiene-styrene plastic) in an injection molding mode, and the PVDF film 11 is bonded and fixed on the inner wall 202 to form a self-generating cylinder with a flat surface, so that vibration of the PVDF film 11 is facilitated.
The leads 102 of the microphone 101 transmit the collected user-generated audio signals to the FETs on the PCB 203 for amplification.
The hand-held portion 300 is formed by injection molding of ABS plastic.
The microphone of the embodiment is provided with the microphone signal amplifying device, the microphone signal amplifying device comprises a piezoelectric module, a power supply module, a control switch and an amplifying module, the piezoelectric module generates vibration based on external sound and/or external vibration, the generated vibration is converted into direct current voltage to charge the power supply module, the power supply module can store the charged electric energy, the amplifying module is powered when the control switch controls the power supply module and the amplifying module to be communicated, the amplifying module amplifies the sound signal emitted by the microphone head, the amplifying module is automatically charged in the microphone signal amplifying device, the power supply of an additional charging battery is not needed, the operation of replacing the charging battery is omitted, the inconvenience of user operation is avoided, and the cost of amplifying the microphone sound is reduced.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
The above description of the microphone signal amplifying device and the microphone provided by the present application is provided, and those skilled in the art will be able to change the embodiments and the application scope according to the idea of the embodiments of the present application, and in summary, the content of the present application should not be construed as limiting the present application.
Claims (10)
1. An apparatus for amplifying a microphone signal, comprising:
the device comprises a piezoelectric module, a power supply module, a control switch and an amplification module;
the piezoelectric module is connected with the power supply module, and the amplifying module is connected with the microphone;
the piezoelectric module is used for generating vibration based on external sound and/or external vibration and converting the generated vibration into direct-current voltage to charge the power supply module;
the control switch is used for connecting or disconnecting the power supply module and the amplification module;
the power supply module is used for storing electric energy charged by the piezoelectric module and supplying power to the amplification module when the control switch controls the power supply module to be communicated with the amplification module, so that the amplification module amplifies a sound signal emitted by the microphone.
2. The microphone signal amplification apparatus of claim 1, further comprising: the constant current module comprises a voltage stabilizing module and a constant current module;
the voltage stabilizing module is connected with the piezoelectric module, the power supply module and the constant current module, and the constant current module is connected with the voltage stabilizing module and the power supply module;
the voltage stabilizing module is used for stabilizing the voltage value of the direct current voltage output by the piezoelectric module within a preset voltage range, and the constant current module is used for stabilizing the current value of the direct current voltage output by the piezoelectric module within a preset current range.
3. The microphone signal amplifying device according to claim 1 or 2, wherein the piezoelectric module includes a PVDF film having an area larger than a preset area.
4. The microphone signal amplification device of claim 3, wherein the power supply module comprises a super capacitor.
5. The microphone signal amplification device of claim 4, wherein the amplification module comprises a field effect transistor.
6. The microphone signal amplifying device according to claim 2, wherein the voltage stabilizing module includes a voltage stabilizing diode, and the constant current module includes a constant current diode.
7. A microphone, comprising:
wheat head, wheat barrel and hand-held part;
the microphone signal amplifying device as claimed in any one of claims 1-5 is arranged in the microphone barrel, and a microphone head is arranged in the microphone head;
the microphone signal amplifying device comprises a microphone signal amplifying device, a power supply module and an amplifying module, wherein the microphone signal amplifying device comprises a microphone, the power supply module is used for supplying power to the microphone signal amplifying device, the piezoelectric module in the microphone signal amplifying device is used for generating vibration based on external sound and/or external vibration and converting the generated vibration into direct-current voltage to charge the power supply module in the microphone signal amplifying device, the power supply module is used for storing electric energy charged by the piezoelectric module and supplying power to the amplifying module when the power supply module is communicated with the amplifying module in the microphone signal amplifying device, and the amplifying module is connected with the microphone and is used for amplifying a sound signal output by the microphone.
8. The microphone of claim 7, wherein the piezoelectric module of the microphone signal amplifying device comprises a PVDF film, wherein the wall of the microphone barrel comprises an inner wall, and the PVDF film is fixedly disposed on the inner wall, and the area of the PVDF film is the same as the area of the inner wall.
9. The microphone as claimed in claim 8, wherein a control switch and a power supply module in the microphone signal amplifying device are disposed in the hand-held portion, the power supply module includes a super capacitor, and an operation button of the control switch is disposed on a surface of the hand-held portion.
10. The microphone as claimed in claim 9, wherein a connection portion of the microphone barrel and the hand-held portion is provided with a printed circuit board, and a lead of the microphone head, a lead of the control switch and a lead of the super capacitor are connected to the printed circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123143154.0U CN216700292U (en) | 2021-12-14 | 2021-12-14 | Microphone signal amplifying device and microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123143154.0U CN216700292U (en) | 2021-12-14 | 2021-12-14 | Microphone signal amplifying device and microphone |
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| Publication Number | Publication Date |
|---|---|
| CN216700292U true CN216700292U (en) | 2022-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123143154.0U Active CN216700292U (en) | 2021-12-14 | 2021-12-14 | Microphone signal amplifying device and microphone |
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| CN (1) | CN216700292U (en) |
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