CN218497781U - Integrated sound source for active noise reduction control - Google Patents
Integrated sound source for active noise reduction control Download PDFInfo
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- CN218497781U CN218497781U CN202222205418.9U CN202222205418U CN218497781U CN 218497781 U CN218497781 U CN 218497781U CN 202222205418 U CN202222205418 U CN 202222205418U CN 218497781 U CN218497781 U CN 218497781U
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Abstract
The utility model discloses an integrated sound source for active noise reduction control, which comprises a box body, wherein one side of the box body is provided with a loudspeaker and at least two microphones, at least one microphone is arranged in the box body, only the radio port of the microphone is exposed out of the box body, the other microphones are fixed at the top of the box body through a mounting fixture, the radio ports of all the microphones are consistent with the direction of the playing port of the loudspeaker, a power supply and a power amplifier module are arranged in the box body, the loudspeaker and the microphone are powered through the power supply, and the box body is provided with an electrical appliance interface for charging the power supply; the power supply and power amplifier module is further integrated with a control unit and a power amplifier circuit, the signal output end of the microphone is connected with the noise detection signal input end of the control unit, the noise reduction signal output end of the control unit is connected with the signal input end of the power amplifier circuit, and the signal output end of the power amplifier circuit is connected with the signal input end of the loudspeaker. Save space, reduce installation time, improve the installation effectiveness, put in a flexible way.
Description
Technical Field
The utility model relates to a noise treatment technical field, concretely relates to integrated form sound source for active noise reduction control.
Background
The nuclear power plant master control room and the auxiliary plants thereof have certain noise problems, and the noise characteristics are different according to different noise generation reasons. Generally, passive noise reduction measures such as sound absorption, sound insulation, damping and a silencer are adopted for the noise problem, the traditional vibration reduction and noise reduction measures have a good control effect for medium and high frequency bands, but many factors such as civil engineering change, safety, shock resistance and the like can be involved, the implementation is difficult in the noise treatment process of an existing nuclear power plant, and the cost is high, so that an active noise reduction system is commonly used in the nuclear power plant for noise reduction.
In conventional active noise reduction systems, a speaker is typically used as an actuator and a microphone is used as a system reference/error sensor. The index parameters of the loudspeaker mainly include: sensitivity, frequency response, impedance, etc. The noise abatement site usually limits the occupation of treatment measures.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving the technical problem who exists among the prior art, creatively provide an integrated form sound source for actively falling control very much, save space, reduce installation time, improve the installation effectiveness, put the flexibility.
In order to realize the above object of the present invention, the present invention provides an integrated sound source for active noise reduction control, comprising a box body, a speaker and at least two microphones are installed on one side of the box body, at least one microphone is arranged inside the box body, only the radio port of the microphone is exposed outside the box body, the other microphones are fixed on the top of the box body through a mounting fixture, and the radio ports of all the microphones are in the same direction as the playing port of the speaker, a power supply and a power amplification module are arranged in the box body, the speaker and the microphone are powered through the power supply, and an electrical interface for charging the power supply is arranged on the box body;
the power supply and power amplifier module is further integrated with a control unit and a power amplifier circuit, the signal output end of the microphone is connected with the noise detection signal input end of the control unit, the noise reduction signal output end of the control unit is connected with the signal input end of the power amplifier circuit, and the signal output end of the power amplifier circuit is connected with the signal input end of the loudspeaker.
In the scheme, the method comprises the following steps: the power amplifier circuit comprises a capacitor C1, one end of the capacitor C1 is a signal input end of the power amplifier circuit and is connected with a noise reduction signal output end of the control unit, the other end of the capacitor C1 is connected with one end of a resistor R1 and a signal input end of an amplifier U1, the other end of the resistor R1 is connected with a power ground, a positive power supply end of the amplifier U1 is connected with one end of a capacitor C3, one end of a capacitor C2 and an amplifier positive power supply end of a power supply, a negative power supply end of the amplifier U1 is connected with one end of the capacitor C3, one end of the capacitor C2 and an amplifier negative power supply end of the power supply, a negative feedback end of the amplifier U1 is connected with one end of a resistor R2 and one end of a resistor R3, the other end of the resistor R3 is connected with one end of a capacitor C4, and the other end of the capacitor C4 is connected with the power ground; the other end of the resistor R2 is connected with one end of a resistor R4 and the output end of the amplifier U1, the other end of the resistor R4 is connected with one end of a capacitor C7, and the other end of the capacitor C7 is connected with a power ground; the output end of the amplifier U1 is also connected with one end of a resistor R5 and one end of a loudspeaker, the other end of the resistor R5 is connected with one end of a capacitor C8 and one end of a resistor R8, the other end of the resistor R8 is connected with a power ground, the other end of the capacitor C8 is connected with the negative feedback end of the amplifier U2 and one end of a resistor R7, the signal input end of the amplifier U2 is connected with one end of a resistor R6, the other end of the resistor R6 is connected with the power ground, the positive power end of the amplifier U2 is connected with the positive power supply end of the amplifier, the negative power supply end of the amplifier U2 is connected with the negative power supply end of the amplifier, the output end of the amplifier U2 is connected with the other end of the resistor R7, one end of the resistor R9 and the other end of the loudspeaker, the other end of the resistor R9 is connected with one end of the capacitor C9, and the other end of the capacitor C9 is connected with the power ground.
In the scheme, the method comprises the following steps: the mounting fixture is concavely provided with a groove matched with the microphone, the microphone is tightly pressed on the top of the box body through the mounting fixture, and the mounting fixture parts on two sides of the groove are mounted on the box body through screws.
In the scheme, the method comprises the following steps: the box body is provided with a mesh enclosure covering the loudspeaker. The loudspeaker is protected from being damaged, and the service life is prolonged.
In the scheme, the method comprises the following steps: the box body is made of aluminum. The weight is lighter, and the transport of being convenient for can adjust according to the demand of oneself.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that: the loudspeaker, the control unit and the microphone are integrated, so that the microphone is convenient to flexibly place on a noise reduction site; the device has the characteristics of small volume, combinability and the like, can be combined according to requirements, and is high in flexibility. The noise level under the current environment is detected through the microphone, the noise signal is transmitted to the control unit, the detected noise signal is amplified through the control unit, and a noise elimination sound field is formed through the loudspeaker.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a circuit diagram of a power amplifier circuit.
Fig. 4 is a schematic diagram of the system of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
As shown in fig. 1 to 4, an integrated sound source for active noise reduction control includes a cabinet 4, and a speaker 6 and two microphones 7 are installed at the front side of the cabinet 4. One of the microphones 7 is arranged in the box body 4, a mounting channel 8 for mounting the microphone 7 is arranged on the front side of the box body 4, the mounting channel 8 extends forwards and backwards, the microphone 7 is arranged in the mounting channel 8, and a sound receiving port of the microphone 7 is exposed out of the box body 4. The other microphone 7 is fixed on the top of the box body 4 through the mounting clamp 1, a groove matched with the microphone 7 is concavely arranged on the mounting clamp 1, the microphone 7 is tightly pressed on the top of the box body 4 through the mounting clamp 1, and the parts of the mounting clamps 1 on two sides of the groove are mounted on the box body 4 through screws. And the sound reception ports of all microphones 7 are directed in line with the playback ports of the speakers 6.
A power supply and power amplification module 9 is arranged in the box body 4, the power supply supplies power to the loudspeaker 6 and the microphone 7, and an electrical appliance interface 3 for charging the power supply is arranged on the side wall of the box body 4;
the power supply and power amplifier module 9 is also integrated with a control unit and a power amplifier circuit, and the signal output end of the microphone 7 is connected with the noise detection signal input end of the control unit. The noise reduction signal output end of the control unit is connected with the signal input end of the power amplifier circuit, and the signal output end of the power amplifier circuit is connected with the signal input end of the loudspeaker 6.
The power amplifier circuit comprises a capacitor C1, one end of the capacitor C1 is a signal input end of the power amplifier circuit and is connected with a noise reduction signal output end of the control unit, the other end of the capacitor C1 is connected with one end of a resistor R1 and a signal input end of an amplifier U1, the other end of the resistor R1 is connected with a power ground, a positive power supply end of the amplifier U1 is connected with one end of a capacitor C3, one end of a capacitor C2 and an amplifier positive power supply end of the power supply, a negative power supply end of the amplifier U1 is connected with one end of the capacitor C3, one end of the capacitor C2 and an amplifier negative power supply end of the power supply, a negative feedback end of the amplifier U1 is connected with one end of the resistor R2 and one end of the resistor R3, the other end of the resistor R3 is connected with one end of a capacitor C4, and the other end of the capacitor C4 is connected with the power ground; the other end of the resistor R2 is connected with one end of a resistor R4 and the output end of the amplifier U1, the other end of the resistor R4 is connected with one end of a capacitor C7, and the other end of the capacitor C7 is connected with a power ground; the output end of the amplifier U1 is also connected with one end of a resistor R5 and one end of a loudspeaker 6, the other end of the resistor R5 is connected with one end of a capacitor C8 and one end of a resistor R8, the other end of the resistor R8 is connected with a power ground, the other end of the capacitor C8 is connected with the negative feedback end of the amplifier U2 and one end of a resistor R7, the signal input end of the amplifier U2 is connected with one end of a resistor R6, the other end of the resistor R6 is connected with the power ground, the positive power end of the amplifier U2 is connected with the positive power supply end of the amplifier of the power supply, the negative power supply end of the amplifier U2 is connected with the negative power supply end of the amplifier, the output end of the amplifier U2 is connected with the other end of the resistor R7, one end of the resistor R9 and the other end of the loudspeaker 6, the other end of the resistor R9 is connected with one end of the capacitor C9, and the other end of the capacitor C9 is connected with the power ground.
Preferably, the mounting fixture 1 is concavely provided with a groove matched with the microphone 7, the microphone 7 is pressed on the top of the box body 4 through the mounting fixture 1, and the mounting fixture 1 parts on two sides of the groove are mounted on the box body 4 through screws.
Preferably, the cabinet 4 is provided with a mesh cover 5 covering the speaker 6. The loudspeaker 6 is protected from being damaged, and the service life is prolonged.
Preferably, the housing 4 is made of aluminum. The weight is lighter, and the transport of being convenient for can adjust according to the demand of oneself.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. An integrated acoustic source for active noise reduction control, comprising: the portable microphone comprises a box body (4), wherein a loudspeaker (6) and at least two microphones (7) are installed on one side of the box body (4), at least one microphone (7) is arranged inside the box body (4), only the sound receiving port of each microphone (7) is exposed out of the box body (4), the rest microphones (7) are fixed on the top of the box body (4) through a mounting clamp (1), the sound receiving ports of all the microphones (7) are in the same direction as the playing port of the loudspeaker (6), a power supply and power amplification module (9) is arranged in the box body (4), the loudspeaker (6) and the microphones (7) are powered through the power supply, and an electric appliance interface (3) used for charging the power supply is arranged on the box body (4);
the power supply and power amplifier module (9) is further integrated with a control unit and a power amplifier circuit, the signal output end of the microphone (7) is connected with the noise detection signal input end of the control unit, the noise reduction signal output end of the control unit is connected with the signal input end of the power amplifier circuit, and the signal output end of the power amplifier circuit is connected with the signal input end of the loudspeaker (6).
2. An integrated acoustic source for active noise reduction control according to claim 1, wherein: the power amplifier circuit comprises a capacitor C1, one end of the capacitor C1 is a signal input end of the power amplifier circuit and is connected with a noise reduction signal output end of the control unit, the other end of the capacitor C1 is connected with one end of a resistor R1 and a signal input end of an amplifier U1, the other end of the resistor R1 is connected with a power ground, a positive power supply end of the amplifier U1 is connected with one end of a capacitor C3, one end of a capacitor C2 and an amplifier positive power supply end of a power supply, a negative power supply end of the amplifier U1 is connected with one end of the capacitor C3, one end of the capacitor C2 and an amplifier negative power supply end of the power supply, a negative feedback end of the amplifier U1 is connected with one end of a resistor R2 and one end of a resistor R3, the other end of the resistor R3 is connected with one end of a capacitor C4, and the other end of the capacitor C4 is connected with the power ground; the other end of the resistor R2 is connected with one end of a resistor R4 and the output end of the amplifier U1, the other end of the resistor R4 is connected with one end of a capacitor C7, and the other end of the capacitor C7 is connected with a power ground; the output end of the amplifier U1 is also connected with one end of a resistor R5 and one end of a loudspeaker (6), the other end of the resistor R5 is connected with one end of a capacitor C8 and one end of a resistor R8, the other end of the resistor R8 is connected with a power ground, the other end of the capacitor C8 is connected with the negative feedback end of the amplifier U2 and one end of a resistor R7, the signal input end of the amplifier U2 is connected with one end of the resistor R6, the other end of the resistor R6 is connected with the power ground, the positive power end of the amplifier U2 is connected with the positive power supply end of the amplifier of the power, the negative power supply end of the amplifier U2 is connected with the negative power supply end of the amplifier, the output end of the amplifier U2 is connected with the other end of the resistor R7, one end of the resistor R9 and the other end of the loudspeaker (6), the other end of the resistor R9 is connected with one end of the capacitor C9, and the other end of the capacitor C9 is connected with the power ground.
3. An integrated acoustic source for active noise reduction control according to claim 1, wherein: the microphone mounting structure is characterized in that a groove matched with the microphone (7) is concavely arranged on the mounting clamp (1), the microphone (7) is tightly pressed on the top of the box body (4) through the mounting clamp (1), and the mounting clamps (1) on two sides of the groove are partially mounted on the box body (4) through screws.
4. An integrated acoustic source for active noise reduction control according to claim 1, wherein: and a mesh enclosure (5) covering the loudspeaker (6) is arranged on the box body (4).
5. An integrated acoustic source for active noise reduction control according to claim 4, wherein: the box body (4) is made of aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222205418.9U CN218497781U (en) | 2022-08-22 | 2022-08-22 | Integrated sound source for active noise reduction control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222205418.9U CN218497781U (en) | 2022-08-22 | 2022-08-22 | Integrated sound source for active noise reduction control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218497781U true CN218497781U (en) | 2023-02-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222205418.9U Active CN218497781U (en) | 2022-08-22 | 2022-08-22 | Integrated sound source for active noise reduction control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218497781U (en) |
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2022
- 2022-08-22 CN CN202222205418.9U patent/CN218497781U/en active Active
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