CN114071321A - System capable of adjusting high-voltage sound source - Google Patents
System capable of adjusting high-voltage sound source Download PDFInfo
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- CN114071321A CN114071321A CN202111178113.7A CN202111178113A CN114071321A CN 114071321 A CN114071321 A CN 114071321A CN 202111178113 A CN202111178113 A CN 202111178113A CN 114071321 A CN114071321 A CN 114071321A
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- 230000003321 amplification Effects 0.000 claims abstract description 19
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 230000005284 excitation Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
- H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
- H03F3/187—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only in integrated circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/213—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only in integrated circuits
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
- H04R2430/01—Aspects of volume control, not necessarily automatic, in sound systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention discloses a system capable of adjusting a high-voltage sound source, which comprises: the device comprises a sine wave generating module, an analog amplifying module, a power amplifier output module and a sounding module; the sine wave generating module comprises a sine wave generating device, a sine wave frequency adjusting device and a sine wave amplitude adjusting device; sine wave generating means for generating a sine wave signal; a sine wave frequency adjusting means for adjusting the frequency of the sine wave signal so as to control the frequency of the emitted sound source; a sine wave amplitude adjusting device for adjusting the amplitude of the sine wave signal so as to control the sound pressure level of the sound source; the analog amplification module is used for amplifying the voltage of the sine wave signal; the power amplifier output module is used for amplifying the power of the sine wave signal and driving the sound production module; and the sounding module is used for sounding sound sources with different frequencies and different sound pressure levels and applying the sound sources to the object to be tested. The system provided by the invention solves the simultaneous adjustment of the frequency and sound pressure level of the sound source.
Description
Technical Field
The invention relates to the technical field of acoustics, in particular to a sound source system capable of adjusting high sound pressure level.
Background
Along with the development of aerospace technology in China, people pay more and more attention to the research of high sound pressure noise. When the sound pressure level is 160dB, the mechanical mechanism of the aerospace craft breaks due to the influence of noise, and the service life of the aerospace craft is seriously influenced. It is now necessary to develop a high sound pressure level source to provide noise excitation. The existing sound source can output 95 dB-120 dB of sound power signals, the main component is a loudspeaker which is usually matched with a power amplifier for use, the loudspeaker can provide sound excitation signals for the calibration of a noise sensor, and the loudspeaker is used for the test of the noise transfer function and the acoustic transfer function, and the sound vibration transfer path analysis.
From the above, it can be seen that how to simultaneously adjust the frequency and the sound pressure level of the sound source is a problem to be solved at present.
Disclosure of Invention
The invention aims to provide a system capable of adjusting a high-voltage sound source, which realizes that the frequency and the sound pressure level of the sound source can be adjusted at the same time.
In order to solve the above technical problem, the present invention provides a system for adjusting a high-voltage sound source, comprising: the device comprises a sine wave generating module, an analog amplifying module, a power amplifier output module and a sounding module;
the sine wave generating module comprises a sine wave generating device, a sine wave frequency adjusting device and a sine wave amplitude adjusting device;
the sine wave generating device is used for generating a sine wave signal;
the sine wave frequency adjusting device is used for adjusting the frequency of the sine wave signal so as to control the frequency of the sound source;
the sine wave amplitude adjusting device is used for adjusting the amplitude of the sine wave signal so as to control the sound pressure level of the sound source;
the analog amplification module is used for amplifying the voltage of the sine wave signal;
the power amplifier output module is used for amplifying the power of the sine wave signal and driving the sound production module;
the sounding module is used for sounding sound sources with different frequencies and different sound pressure levels and applying the sound sources to an object to be tested.
In one embodiment of the present invention, the sine wave frequency adjusting device is:
the sine wave frequency control knob with the adjusting range of 50 Hz-8 KHz.
In one embodiment of the present invention, the sine wave amplitude adjusting device is:
the adjusting range is 0V-1V sine wave amplitude control knob.
In one embodiment of the present invention, the sine wave sound generating device includes:
the amplifier comprises an amplifying circuit, a positive feedback network, a frequency selection network and an amplitude stabilizing circuit.
In one embodiment of the present invention, the analog amplification module comprises:
the analog amplification module adopts an in-phase amplification circuit.
In an embodiment of the present invention, an emitter of a transistor in the sine wave generating module is connected to a collector of a transistor in the analog amplifying module through a resistor, and an emitter of a transistor in the analog amplifying module is connected to a collector of a transistor in the power amplifier output module through a resistor.
In one embodiment of the present invention, the sound emitting module includes:
a horn, a sound tube and an adapter;
the loudspeaker is used for generating a sound source;
the sound transmission tube is used for transmitting an output sound source;
the adapter is used for matching the object to be detected.
In one embodiment of the invention, the horn is connected to the sound tube, and the sound tube is connected to the adapter.
In an embodiment of the present invention, the power amplifier output module includes:
a power amplifying circuit and a driving device;
the power amplification circuit is connected with the driving device, so that the sine wave signal can be output conveniently and directly passes through the driving device to drive the sound production module to emit a sound source.
In an embodiment of the present invention, the driving device in the power amplifier output module is connected to the speaker in the sound module through a wire.
The system capable of adjusting the high-voltage sound source provided by the invention generates and adjusts the frequency and the size of a sine wave signal through the sine wave sounding module, amplifies the voltage in the sine wave signal through the analog amplification module, amplifies the power of the sine wave signal through the power amplification output module, drives a loudspeaker in the sound source module to emit the sound source through the output module, and transmits the sound source to a measured object through the sound transmission tube; the invention realizes the simultaneous adjustment of the frequency and the sound pressure level of the emitted sound source by adjusting the frequency and the amplitude of the sine wave signal.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a block diagram of a first embodiment of an adjustable high-pressure stage sound source system provided by the present invention;
Detailed Description
The core of the invention is to provide a system capable of adjusting the high-voltage level sound source, so as to realize the simultaneous adjustment of the frequency and the sound pressure level of the sound source.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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 invention.
Referring to fig. 1, fig. 1 is a structural diagram of a first embodiment of a system for adjusting a high-pressure sound source according to the present invention; the adjustable high-voltage sound source system provided by the invention comprises a sine wave generating module, an analog amplifying module, a power amplifier output module and a sounding module.
The emitter connecting resistance reconnection of triode in the sine wave produces the module the collecting electrode of triode in the simulation module of amplifying, the emitter connecting resistance reconnection of triode in the simulation module of amplifying the collecting electrode of triode in the power amplifier output module, drive arrangement in the power amplifier output module passes through the wire and connects among the sound production module loudspeaker, loudspeaker connect the acoustic pipe, the acoustic pipe is connected the adapter.
The sine wave generating module comprises a sine wave generating device, a sine wave frequency control knob and a sine wave amplitude control knob.
The frequency and the amplitude of the sine wave signal are adjusted through the sine wave frequency control knob and the sine wave amplitude control knob, and the sine wave signal is generated by the sine wave generating device.
The sine wave signal is amplified in voltage through the analog amplification module, and then amplified in power through the power amplifier output module, and the voltage of sine waves from the sine wave generation module to the power amplifier output module is amplified by 46 times.
And the power amplifier output module is utilized to drive the sounding module to emit a sound source, and the sound source is applied to an object to be tested.
The power amplification circuit is connected with the driving device, so that the sine wave signal can be output conveniently and directly passes through the driving device to drive the sound production module to emit a sound source.
And the emitted sound source acts on the object to be detected matched with the adapter through the sound transmission tube.
According to the frequency and the sound pressure level required by the object to be measured, the frequency and the amplitude of the sine wave are adjusted in the sine wave generation module, and the frequency and the sound pressure level of the sound source can be changed.
The invention can provide acoustic excitation, calibrate the noise sensor at high sound pressure levels, and adjust the frequency. The acoustic calibration device overcomes the defects that the acoustic pressure level in the acoustic calibration device is satisfied but the frequency is fixed (an acoustic calibrator) or the frequency-adjustable acoustic pressure level is low (an electrostatic actuator), realizes the simultaneous adjustment of the acoustic pressure level and the frequency, and establishes the relationship between the frequency and the amplitude of the sine wave and the frequency and the amplitude of the output acoustic signal.
The system provided by the embodiment of the invention can be realized by adjusting the frequency and the amplitude of the sine wave to control the frequency and the pressure level of the sound source to be sent so as to be required by the object to be detected.
Based on the above embodiments, the present embodiment utilizes the adjustable high-pressure sound source system to generate a sound source with a frequency of 8KHz and a sound pressure level of 160dB, and adjusts the frequency and amplitude of the sine wave to change the frequency and sound pressure level of the sound source.
Through adjusting sine wave frequency control knob, adjust the frequency of sine wave signal alright control send the frequency of sound source, the frequency of sine wave is the one-to-one with the frequency of sound source, and 1KHz during the sine wave, the sound source is exactly 1KHz, all can adjust in 50Hz ~ 8KHz within range.
By adjusting the sine wave size control knob, the sound pressure level of a sound source can be controlled by adjusting the amplitude of the sine wave signal so as to control the stool and urine, and the maximum positive pressure level can reach 160 dB.
And a frequency knob and an amplitude knob which control the sine wave generating circuit are shifted so as to control the frequency and amplitude of the output sound signal, wherein the frequency of the sine wave is the frequency of the output sound signal.
The frequency of the sine wave is adjusted to 8KHz, the amplitude of the sine wave is adjusted to 1V, and a sine wave signal with the frequency of 8KHz and the amplitude of 1V is generated by a sine wave generating device.
The sine wave signal is transmitted to the analog amplification circuit, the voltage of the sine wave signal is amplified through the in-phase amplification circuit, the power of the sine wave signal is amplified through the power amplifier output circuit, and the voltage of the sine wave signal is amplified by 46 times in the whole amplification process.
The sine wave signal amplified by 46 times is used for driving a loudspeaker to emit a sound source with the frequency of 8KHz and the sound pressure level of 160dB by using an output circuit.
The sound source with the generated frequency of 8KHz and sound pressure level of 160dB is transmitted to the adapter-matched detection device by using the sound transmission tube.
The frequency of the sine wave is adjusted to be 50Hz, the amplitude value is 0.1V, the sound source is amplified and output through the analog amplification circuit and the power amplifier output circuit, the frequency can be 8KHz, the sound source with the sound pressure level of 160dB can be adjusted to be the sound source with the frequency of 50Hz and the sound pressure level of 16 dB.
The need to simultaneously adjust the frequency and sound pressure level of the sound source can be achieved by adjusting the frequency and amplitude of the sine wave signal.
According to the system provided by the embodiment, by utilizing the system provided by the invention, a sine wave signal with the frequency of 8KHz and the amplitude of 1V is subjected to analog amplification and a power amplifier output circuit to drive a loudspeaker to generate a 160dB sound source meeting the high pressure level of aerospace, the frequency of 8KHz is used for adjusting the frequency and the amplitude of the sine wave signal, the frequency of 8KHz and the sound pressure level of 160dB are adjusted to be 50Hz, and the sound pressure level of 16dB, so that the sound source frequency and the sound pressure level can be adjusted at the same time.
The system for adjusting a high-pressure sound source provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A system for adjusting a high pressure stage sound source, comprising:
the device comprises a sine wave generating module, an analog amplifying module, a power amplifier output module and a sounding module;
the sine wave generating module comprises a sine wave generating device, a sine wave frequency adjusting device and a sine wave amplitude adjusting device;
the sine wave generating device is used for generating a sine wave signal;
the sine wave frequency adjusting device is used for adjusting the frequency of the sine wave signal so as to control the frequency of the sound source;
the sine wave amplitude adjusting device is used for adjusting the amplitude of the sine wave signal so as to control the sound pressure level of the sound source;
the analog amplification module is used for amplifying the voltage of the sine wave signal;
the power amplifier output module is used for amplifying the power of the sine wave signal and driving the sound production module;
the sounding module is used for sounding sound sources with different frequencies and different sound pressure levels and applying the sound sources to an object to be tested.
2. The system of claim 1, wherein the sine wave frequency adjustment means is:
the sine wave frequency control knob with the adjusting range of 50 Hz-8 KHz.
3. The system of claim 1, wherein the sine wave amplitude adjustment means is:
the adjusting range is 0V-1V sine wave amplitude control knob.
4. The system of claim 1, wherein the sine wave generating means comprises:
the amplifier comprises an amplifying circuit, a positive feedback network, a frequency selection network and an amplitude stabilizing circuit.
5. The system of claim 1, wherein an in-phase amplification circuit is employed in the analog amplification module.
6. The system of claim 1, wherein the emitter connecting resistor of the transistor of the sine wave generating module is further connected to the collector of the transistor of the analog amplifying module, and the emitter connecting resistor of the transistor of the analog amplifying module is further connected to the collector of the transistor of the power amplifier output module.
7. The system of claim 1, wherein the sound module comprises:
a horn, a sound tube and an adapter;
the loudspeaker is used for generating a sound source;
the sound transmission tube is used for transmitting an output sound source;
the adapter is used for matching the object to be detected.
8. The system of claim 7, wherein the horn is coupled to the sound tube, the sound tube being coupled to the adapter.
9. The system of claim 1, wherein the power amplifier output module comprises:
a power amplifying circuit and a driving device;
the power amplification circuit is connected with the driving device, so that the sine wave signal can be output conveniently and directly passes through the driving device to drive the sound production module to emit a sound source.
10. The system of claim 9, wherein the driving device of the power amplifier output module is connected to the speaker of the sound module through a wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111178113.7A CN114071321A (en) | 2021-10-09 | 2021-10-09 | System capable of adjusting high-voltage sound source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111178113.7A CN114071321A (en) | 2021-10-09 | 2021-10-09 | System capable of adjusting high-voltage sound source |
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| CN114071321A true CN114071321A (en) | 2022-02-18 |
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| CN202111178113.7A Pending CN114071321A (en) | 2021-10-09 | 2021-10-09 | System capable of adjusting high-voltage sound source |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2777852Y (en) * | 2005-02-01 | 2006-05-03 | 苏州市职业大学 | Sine wave signal generator |
| CN202383993U (en) * | 2011-11-08 | 2012-08-15 | 威凯检测技术有限公司 | Sound source generator used for verifying noise test capability |
| CN103233724A (en) * | 2013-04-26 | 2013-08-07 | 中国石油大学(华东) | Sound source exciting device for acoustic logging while drilling |
| CN110161933A (en) * | 2019-06-11 | 2019-08-23 | 宁波新策电子科技有限公司 | A kind of adjustable automatic stabilisation sine wave generating device of frequency |
| CN209375583U (en) * | 2018-11-19 | 2019-09-10 | 哈尔滨理工大学 | A kind of 300MHz sine wave signal generation circuit |
| CN213903643U (en) * | 2020-12-29 | 2021-08-06 | 江苏航发自动化科技有限公司 | Signal output control device |
-
2021
- 2021-10-09 CN CN202111178113.7A patent/CN114071321A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2777852Y (en) * | 2005-02-01 | 2006-05-03 | 苏州市职业大学 | Sine wave signal generator |
| CN202383993U (en) * | 2011-11-08 | 2012-08-15 | 威凯检测技术有限公司 | Sound source generator used for verifying noise test capability |
| CN103233724A (en) * | 2013-04-26 | 2013-08-07 | 中国石油大学(华东) | Sound source exciting device for acoustic logging while drilling |
| CN209375583U (en) * | 2018-11-19 | 2019-09-10 | 哈尔滨理工大学 | A kind of 300MHz sine wave signal generation circuit |
| CN110161933A (en) * | 2019-06-11 | 2019-08-23 | 宁波新策电子科技有限公司 | A kind of adjustable automatic stabilisation sine wave generating device of frequency |
| CN213903643U (en) * | 2020-12-29 | 2021-08-06 | 江苏航发自动化科技有限公司 | Signal output control device |
Non-Patent Citations (1)
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| 李瑜庆;田娟;: "基于DDS的高频正弦波信号发生器设计与实现", 通化师范学院学报, no. 02, pages 1 - 4 * |
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