CN205876649U - Active noise reduction system that initiatively eliminates noise of compressor - Google Patents
Active noise reduction system that initiatively eliminates noise of compressor Download PDFInfo
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- CN205876649U CN205876649U CN201620471931.4U CN201620471931U CN205876649U CN 205876649 U CN205876649 U CN 205876649U CN 201620471931 U CN201620471931 U CN 201620471931U CN 205876649 U CN205876649 U CN 205876649U
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Abstract
The utility model discloses an active noise reduction system that initiatively eliminates noise of compressor, it mainly includes voice capture module, controller module and voice output module, voice capture module, controller module and voice output module connect gradually, voice capture module is used for gathering the noise signal of compressor, the controller module is used for receiving noise signal that voice capture module gathered and handles this noise signal, produces to equal and the opposite anti - noise signal of phase place with this noise signal amplitude, the voice output module is for the anti - noise signal and the output of the output of reception control unit module, the utility model discloses the principle of utilizing the sound wave mutual interference to offset can be sent equally with compressor noise amplitude and the opposite anti - noise signal of phase place, and initial noise is offset in the interference to reach the purpose that reduces compressor noise level, therefore can obtain better low frequency the noise reduction effect with littleer volume.
Description
Technical field
This utility model relates to universal machine noise elimination noise reduction technical field, eliminates the noise particularly to a kind of active active of compressor
Noise reduction system.
Background technology
Compressor is as a kind of common apparatus for improving gas pressure and conveying gas, in oil, natural gas, change
The field such as work, metallurgy is widely applied.Compressor can produce the biggest noise in the course of the work, the lowest
Frequently noise characteristic is notable, is the key component in compressor noise.These noises often to the physiology of surrounding people and
Mental health causes various injury, auditory dysesthesia, it is easy to tired, aprosexia, production efficiency reduction etc..
Passive noise reduction technology is by noise sound wave and acoustical material or the interaction sound energy consumption of acoustic construction, thus reaches
To the purpose of reduction noise, but being difficult to use in control low-frequency noise, unless disregarded any cost, passive denoising device being made to
Sufficiently large.If passive noise reduction technology is used for controlling low-frequency noise, passive denoising device is the most bulky, expensive, and
And be difficult to install.
Utility model content
This utility model solves the technical problem that and is to provide that a kind of volume is little, the active master of a kind of compressor of excellent noise reduction effect
Dynamic noise elimination noise reduction system.
This utility model solves its technical problem and be the technical scheme is that a kind of compressor active active noise elimination noise reduction
System, including sound acquisition module, controller module and sound output module, described sound acquisition module, controller module and
Voice output module is sequentially connected with；
Described sound acquisition module is in order to the noise signal of collect and process machine；
This noise signal is also carried out by noise signal that described controller module collects in order to receive sound acquisition module
Process, produce and the antinoise signal of opposite in phase equal with this noise signal amplitude；
Described voice output module is in order to receive the antinoise signal of controller module output and to export.
Further: also include that noise elimination evaluation module, described noise elimination evaluation module are connected with controller module, disappear described in
Acoustic evaluation module is interfered the noise signal after offsetting in order to gather and passes it to controller module, assessment noise elimination noise reduction effect
Really.
Further: described sound input module includes the first sound collector, the first data conditioning circuit, the first filter
Wave circuit, the first A/D convertor circuit, described first sound collector, the first data conditioning circuit, the first filter circuit, an AD
Change-over circuit is sequentially connected with.
Have plenty of further: described voice output module includes audio output device, the second data conditioning circuit, the second filter
Wave circuit, DA change-over circuit, described audio output device, the second data conditioning circuit, the second filter circuit, DA change-over circuit depend on
Secondary connection.
Further: described noise elimination evaluation module includes the second sound collector, the 3rd data conditioning circuit, the 3rd filter
Wave circuit and the second A/D convertor circuit, described second sound collector, the 3rd data conditioning circuit, the 3rd filter circuit and second
A/D convertor circuit is sequentially connected with.
Further: the quantity of described first sound collector, the second sound collector and audio output device 1～
Between 16.
Further: described first sound collector, the second sound collector and audio output device are around compressor
Lay, and the second sound collector is distal to first sound collector distance away from compressor compared with the distance of compressor.
Further: described first sound collector is non-acoustic sensor or acoustic sensor, described non-acoustic
Sensor is in order in order to indirect collect and process machine characteristic frequency, according to characteristic frequency synthetic compressor noise signal；Described sampling
Frequency is 0.2kHz～192kHz.
Further: described second sound collector is acoustic sensor, described sample frequency be 0.2kHz～
192kHz。
Further: described controller module includes dsp chip, and the quantity of described dsp chip is between 1～16.
The beneficial effects of the utility model are: this utility model utilizes sound wave to interfere the principle of counteracting, can send with
Compressor noise amplitude is equal and the antinoise signal of opposite in phase, interferes and offsets initial noisc, thus reduces compressor
The purpose of noise level, thus more preferable low frequency noise reduction, and the setting of noise elimination evaluation module can be obtained with less volume
Controller module can be made constantly to adjust the amplitude of sound wave and the phase place of antinoise signal by assessment soundproof effect, thus reach
To predetermined soundproof effect.
Accompanying drawing explanation
Fig. 1 is active noise-cancelling theory schematic diagram.
Fig. 2 is the structured flowchart of active active noise elimination noise reduction system.
Fig. 3 is the structural representation of the embodiment of active active noise elimination noise reduction system.
Figure is labeled as: first sound collector the 1, second sound collector 2, speaker 3.
Detailed description of the invention
With detailed description of the invention, this utility model is further illustrated below in conjunction with the accompanying drawings.
Being illustrated in figure 1 this utility model schematic diagram, its ultimate principle is for introducing secondary sound source and utilizing it in sound field
Send equal with initial noisc amplitude but " antinoise " of opposite in phase, interfere and offset initial noisc, thus it is initial to reach suppression
The purpose of noise.
A kind of compressor active active noise elimination noise reduction system as shown in Figure 2, including sound acquisition module, controller module
With sound output module, described sound acquisition module, controller module and sound output module are sequentially connected with；
Described sound acquisition module is in order to the noise signal of collect and process machine；
This noise signal is also carried out by noise signal that described controller module collects in order to receive sound acquisition module
Process, produce and " antinoise " signal of opposite in phase equal with this noise signal amplitude；
Described voice output module is in order to receive " antinoise " signal of controller module output and to export, owing to " counter making an uproar
Sound " signal is equal with noise signal amplitude and opposite in phase so that and two signals interfere reaction, thus reduce noise
Purpose, and native system volume is little, excellent noise reduction effect.
Additionally, described sound input module includes the first sound collector, the first data conditioning circuit, the first filtered electrical
Road, the first A/D convertor circuit, described first sound collector, the first data conditioning circuit, the first filter circuit, the first AD conversion
Circuit is sequentially connected with, and described voice output module includes audio output device, the second data conditioning circuit, the second filter circuit,
DA change-over circuit, described audio output device, the second data conditioning circuit, the second filter circuit, DA change-over circuit be sequentially connected with,
First sound collector sequentially passes through the first data conditioning circuit, the first filter circuit, the first AD conversion after obtaining noise signal
Circuit so that the analogue noise signal collected is converted into digital signal and reaches controller module and carry out data process, through place
Digital signal is turned by the signal after reason through DA change-over circuit, the second filter circuit, the second data conditioning circuit, audio output device
Turning to analog signal output, described audio output device is speaker or sound equipment etc., uses this kind of circuit can make signals collecting
More accurate with output, advantageously reduce the noise of compressor.
Additionally, also include noise elimination evaluation module, described noise elimination evaluation module is connected with controller module, described assessment of eliminating the noise
Module is interfered the noise signal after offsetting in order to gather and passes it to controller module, assesses noise elimination noise reduction effect, described
Noise elimination evaluation module includes the second sound collector, the 3rd data conditioning circuit, the 3rd filter circuit and the second A/D convertor circuit,
Described second sound collector, the 3rd data conditioning circuit, the 3rd filter circuit and the second A/D convertor circuit are sequentially connected with, and second
Signal after the noise reduction that sound collector will collect sequentially passes through the 3rd data conditioning circuit, the 3rd filter circuit and the 2nd AD
Change-over circuit so that analogue signal is converted to digital signal and feeds back to controller module, assesses active active noise elimination noise reduction system
Soundproof effect, due to produce antinoise signal time cannot directly form the signal equal with initial noisc signal amplitude, need
Gradually approach, therefore need noise elimination evaluation module to identify,.Equipment noise after noise reduction being detected is higher than our setting value
Time, controller module, by constantly adjusting amplitude and the phase place of the antinoise signal that voice output module sends, is finally reached pre-
The soundproof effect that phase sets so that reduce the noise effects of compressor more preferably.
Described first sound collector can be acoustic sensor, and described sample frequency is 0.2kHz～192kHz, described
Acoustic sensor can be microphone, mike etc., and described first sound collector can also be non-acoustic sensor, described non-
Acoustic sensor is tachometer, accelerometer, optical pickocff etc., and described non-acoustic sensor is in order in order to indirect collect and process machine
Characteristic frequency, according to characteristic frequency synthetic compressor noise signal.
Described second sound collector is acoustic sensor, and described sample frequency is 0.2kHz～192kHz, described acoustics
Sensor can be microphone, mike etc..
Described first sound collector, the second sound collector and audio output device lay around compressor, and second
Sound collector is distal to first sound collector distance away from compressor compared with the distance of compressor, the first sound collector, second
The quantity of sound collector and audio output device is between 1～16, and described controller module includes dsp chip, described DSP
The quantity of chip is between 1～16.
Being illustrated in figure 3 one of them embodiment, compressor surrounding is provided with four and measures the of compressor noise signals
One acoustic sensor 1, the output speaker 3 being provided with correspondence around each first acoustic sensor 1 is believed after measuring noise elimination
Number the second acoustic sensor 2, second acoustic sensor 2 distance away from compressor more than the first acoustic sensor 1 away from compressor
Distance, the first acoustic sensor 1 is in order to the noise signal of collect and process machine, and speaker 3 is in order to send and noise signal amplitude
Equal, the anti-noise signal of opposite in phase so that the noise around compressor is lowered, the second acoustic sensor 2 can be adopted
The noise that collection interferes, carries out the assessment of soundproof effect so that the amplitude of the sound wave of anti-noise signal and phase place can be by not
Break and adjust and obtain best noise reduction.
Particular embodiments described above, has carried out entering one to the purpose of this utility model, technical scheme and beneficial effect
Step describes in detail, be it should be understood that and the foregoing is only specific embodiment of the utility model, is not limited to this
Utility model, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. done, all should wrap
Within being contained in protection domain of the present utility model.
Claims (8)
1. a compressor active active noise elimination noise reduction system, it is characterised in that: include sound acquisition module, controller module and
Voice output module, described sound acquisition module, controller module and sound output module are sequentially connected with；
Described sound acquisition module is in order to the noise signal of collect and process machine；
This noise signal is also processed by noise signal that described controller module collects in order to receive sound acquisition module,
Produce and the antinoise signal of opposite in phase equal with this noise signal amplitude；
Described voice output module is in order to receive the antinoise signal of controller module output and to export；
Described sound input module includes that the first sound collector, the first data conditioning circuit, the first filter circuit, an AD turn
Changing circuit, described first sound collector, the first data conditioning circuit, the first filter circuit, the first A/D convertor circuit connect successively
Connect；
Described first sound collector is non-acoustic sensor, and described non-acoustic sensor is tachometer or accelerometer, described non-
Acoustic sensor is in order to indirect collect and process machine characteristic frequency, according to characteristic frequency synthetic compressor noise signal.
2. a kind of compressor active active noise elimination noise reduction system as claimed in claim 1, it is characterised in that: also include that noise elimination is commented
Estimating module, described noise elimination evaluation module is connected with controller module, after described noise elimination evaluation module is in order to gather interference counteracting
Noise signal also passes it to controller module, assesses noise elimination noise reduction effect.
3. a kind of compressor active active noise elimination noise reduction system as claimed in claim 2, it is characterised in that: described assessment of eliminating the noise
Module includes the second sound collector, the 3rd data conditioning circuit, the 3rd filter circuit and the second A/D convertor circuit, described second
Sound collector, the 3rd data conditioning circuit, the 3rd filter circuit and the second A/D convertor circuit are sequentially connected with.
4. a kind of compressor active active noise elimination noise reduction system as claimed in claim 1, it is characterised in that: described voice output
Module includes audio output device, the second data conditioning circuit, the second filter circuit, DA change-over circuit, and described voice output sets
Standby, the second data conditioning circuit, the second filter circuit, DA change-over circuit are sequentially connected with.
5. a kind of compressor active active noise elimination noise reduction system as described in claim 1 or 3, it is characterised in that: described first
The quantity of sound collector, the second sound collector and audio output device is between 1～16.
6. a kind of compressor active active noise elimination noise reduction system as described in claim 3 or 4, it is characterised in that: described first
Sound collector, the second sound collector and audio output device lay around compressor, and the second sound collector relatively compresses
The distance of machine is distal to first sound collector distance away from compressor.
7. a kind of compressor active active noise elimination noise reduction system as claimed in claim 3, it is characterised in that: described second sound
Harvester is acoustic sensor, and sample frequency is 0.2kHz～192kHz.
8. a kind of compressor active active noise elimination noise reduction system as claimed in claim 1, it is characterised in that: described controller mould
Block includes dsp chip, and the quantity of described dsp chip is between 1～16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201620471931.4U CN205876649U (en) | 2016-05-23 | 2016-05-23 | Active noise reduction system that initiatively eliminates noise of compressor |
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| CN201620471931.4U CN205876649U (en) | 2016-05-23 | 2016-05-23 | Active noise reduction system that initiatively eliminates noise of compressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840462A (en) * | 2016-05-23 | 2016-08-10 | 苏州艾柏特精密机械有限公司 | Active noise-eliminating and noise-reducing system of compressor |
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2016
- 2016-05-23 CN CN201620471931.4U patent/CN205876649U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840462A (en) * | 2016-05-23 | 2016-08-10 | 苏州艾柏特精密机械有限公司 | Active noise-eliminating and noise-reducing system of compressor |
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