CN205881451U - Device of making an uproar is removed to intelligence house - Google Patents
Device of making an uproar is removed to intelligence house Download PDFInfo
- Publication number
- CN205881451U CN205881451U CN201620789851.3U CN201620789851U CN205881451U CN 205881451 U CN205881451 U CN 205881451U CN 201620789851 U CN201620789851 U CN 201620789851U CN 205881451 U CN205881451 U CN 205881451U
- Authority
- CN
- China
- Prior art keywords
- noise
- signal
- conversion module
- unit
- processing unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model provides a device of making an uproar is removed to intelligence house, including the DSP processing unit who links to each other with elementary noise acquisition unit, DSP processing unit links to each other with secondary noise output unit, residual noise acquisition unit respectively, the noise that elementary noise source produced is propagated in the space and is formed the sound field, sending into the preamplification circuit behind the elementary noise signal of reference sensor collection among the elementary noise acquisition unit and carrying out the signal amplification, the signal after enlargeing loops through the anti -aliasing filter ware with AD conversion module turns into data signal with analog signal, delivers to DSP processing unit and carries out the adaptive noise cancellation processing, signal after the processing loops through and drives the noise that the speaker sent with the noise amplitude is the same, the phase place is opposite elementarily after DA conversion module, smoothing filter and power amplifier amplify, remaining noise signal after residual noise acquisition unit gathers and to offset enlargies the residue signal, convert to and delivers to DSP processing unit behind the data signal and handle, have the characteristics effectual, simple structure of making an uproar.
Description
Technical field
This utility model belongs to noise management technique field, particularly to a kind of Smart Home denoising device, with multichannel
Denoising is realized based on active noise controlling.
Background technology
In daily life, we can be by effect of noise.Such as automobile engine and row in civil area
The noise of feed channel, the noise that in industrial circle, ventilation shaft, transformator, compressor etc. bring.Particularly room internal fan, sky
The work of the noise on human that the electrical equipments such as tune produce, sleep have serious impact, and people in the noise hazard of high intensity
Body, make people feel tired, produce negative feeling, even cause disease.Due to people to the requirement of quality of life increasingly
Height, especially requires to reduce the noise under some special environment, and therefore the control to noise is particularly important.
Fan noise is all the most universal a kind of noise source in daily life and commercial production, and the effect of fan is
Producing enough pressure enables the gas of needs to pass through, so generally fan noise is by rotational noise and wadding flow noise two
Part composition.Owing to this partial noise is at low-frequency range, the most traditional passive noise control wants to reach good noise reduction
Effect is difficult.
Summary of the invention
For overcoming above-mentioned the deficiencies in the prior art, this utility model purpose is that solving room internal fan, air-conditioning etc. produces
The impact of noise on human and a kind of device of designing, this device can effectively weaken the low-frequency noise in room.
For achieving the above object, the technical solution used in the present invention is: a kind of Smart Home denoising device, includes with just
The DSP processing unit that level Noise Acquisition unit is connected, DSP processing unit is adopted with secondary noise output unit, residual noise respectively
Collection unit is connected.
Described primary noise collecting unit includes reference sensor, and reference sensor is by pre-amplification circuit one and resists
Aliasing filter one is connected, and frequency overlapped-resistable filter one is connected with AD conversion module one.
Described secondary noise output unit includes that D/A conversion module, D/A conversion module are put with power by smoothing filter
Big device is connected, and power amplifier is connected with speaker.
Described residual noise collecting unit includes error pick-up, error pick-up by pre-amplification circuit two with
Frequency overlapped-resistable filter two is connected, and frequency overlapped-resistable filter two is connected with DSP processing unit by AD conversion module two.
Described speaker according to fan-shaped array above the quiet district that error pick-up forms.
DSP processing unit uses multichannel NLMS algorithm to be automatically adjusted relevant parameter, it is achieved noise cancellation.
DSP processing unit is as noise cancellation processing module.
Described reference sensor is used for gathering fan noise signal to realize acoustic-electric translation function；Pre-amplification circuit will
The signal of telecommunication after conversion is amplified to certain level and processes for subsequent conditioning circuit；It is useless that frequency overlapped-resistable filter filters in signal some
High fdrequency component；AD conversion module is used for converting analog signals into digital signal.
Described dsp processor uses multichannel NLMS algorithm in self-adaprive predictive control can be automatically adjusted relevant
Parameter, follows practical situation change, it is achieved optimal neutralization effect.
Described D/A conversion module (10) converts digital signals into analogue signal；Smoothing filter eliminates analogue signal
Ladder, constructs the low frequency signal that waveform is smooth；Power amplifier amplifies the faint signal of telecommunication to drive speaker to send sound
Sound.
Described error pick-up is used for gathering residual noise signal to realize acoustic-electric conversion；Pre-amplification circuit will conversion
After the signal of telecommunication be amplified to certain level and process for subsequent conditioning circuit；Frequency overlapped-resistable filter filters high fdrequency component useless in signal
Prevent by producing spectral aliasing after AD conversion module.
The noise that noise source produces propagates formation sound field in space；In order to expand noise cancellation scope, whole device selects
Use multichannel active noise control system, offset the noise energy in desired region, dead zone by the speaker of fan-shaped array,
Formed without sound area, just can control the size without sound area by controlling fan-shaped angle.
Compared with prior art, the beneficial effects of the utility model are:
The noise that this device produces for room internal fan, air-conditioning etc., uses Multi-channel active noise control device, effectively
The formation of noise dead zone of low-frequency range under specific environment is offset on ground.And compared with traditional passive control methods, this utility model
Simple in construction, uses more light and flexible.
This utility model uses active noise controlling, and active noise controlling is by adding and noise amplitude phase in sound field
Same, the sound wave of opposite in phase, this sound wave is overlapped mutually with noise source and offsets, thus the one realizing noise reduction is noise control
Method.This solves and low frequency range noise is controlled the undesirable defect of effect, and implement that volume is little, be easy to set
Count, install and control.Meanwhile, when noise is in indoor environment, sound wave is propagated with the form of spherical wave, now must select many
Passage active noise control system, offsets the noise energy in a certain region by the secondary sound source of fan-shaped array, is formed noiseless
District.Therefore the method for counteracting to(for) low-frequency noise in daily life and commercial production has great importance.
Accompanying drawing explanation
Fig. 1 is the system structure that this utility model carries out domestic environment denoising with multichannel active noise controlling for method
Figure.
In figure: 1 is primary noise source, 2 is primary noise collecting unit, and 3 is DSP processing unit, and 4 export for secondary noise
Unit, 5 is residual noise collecting unit, and 6 is reference sensor, and 7 is pre-amplification circuit one, and 8 is frequency overlapped-resistable filter one, 9
For AD conversion module one, 10 is D/A conversion module, and 11 is smoothing filter, and 12 is power amplifier, and 13 is speaker, and 14 for by mistake
Gap sensor, 15 is pre-amplification circuit two, and 16 is frequency overlapped-resistable filter two, and 17 is AD conversion module two.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described in further detail.
See Fig. 1, a kind of Smart Home denoising device, include the DSP being connected with primary noise collecting unit 2 and process single
Unit 3, DSP processing unit 3 is connected with secondary noise output unit 4, residual noise collecting unit 5 respectively.
Described primary noise collecting unit 2 includes reference sensor 6, and reference sensor 6 is by pre-amplification circuit 1
Being connected with frequency overlapped-resistable filter 1, frequency overlapped-resistable filter 1 is connected with AD conversion module 1.Collecting unit 2 at primary noise
It is used for gathering, processing noise signal, after having processed, this signal being delivered to carries out processing generation two-way in DSP processing unit 3 defeated
Going out signal, processing method uses the multichannel NLMS algorithm in self-adaprive predictive control.
Described secondary noise output unit 4 includes D/A conversion module 10, and D/A conversion module 10 passes through smoothing filter
11 are connected with power amplifier 12, and power amplifier 12 is connected with speaker 13.The two-way wherein produced by DSP processing unit 3
Output signal, through D/A conversion module 10, converts digital signals into analogue signal；Two-way analogue signal passes through smoothing filter
11 ladders eliminating signal, construct the low frequency signal that waveform is smooth；Power amplifier 12 amplifies the faint signal of telecommunication to drive
Two speakers 13 send noise identical with noise source amplitude, opposite in phase respectively and offset.
Described residual noise collecting unit 5 includes error pick-up 14, and error pick-up 14 is positioned at desired dead zone,
Error pick-up 14 is connected with frequency overlapped-resistable filter 2 16 by pre-amplification circuit 2 15, and frequency overlapped-resistable filter 2 16 passes through AD
Modular converter 2 17 is connected with DSP processing unit 3.Wherein two-way error pick-up 14 gathers the residual noise letter after offsetting respectively
Number, the signal after gathering is delivered to pre-amplification circuit 15 after being converted into the signal of telecommunication and is amplified, and frequency overlapped-resistable filter 16 filters
The high fdrequency component that in signal, some are useless；Signal after filtering is input in AD conversion module 2 17 be AD converted；Turn
Digital signal after changing continues to be fed into the renewal carrying out sef-adapting filter weights in DSP processing unit 3 to adapt to actual environment
Change.
Described speaker 13 according to fan-shaped array above the quiet district that error pick-up 14 forms.
Described residual noise collecting unit 5 is connected with DSP processing unit 3.
DSP processing unit 3 uses multichannel NLMS algorithm to be automatically adjusted relevant parameter, it is achieved noise cancellation.
DSP processing unit is as noise cancellation processing module.
Described reference sensor 6 is used for gathering fan noise signal to realize acoustic-electric translation function, by noise signal also
It is translated into the signal of telecommunication；The signal of telecommunication after conversion is amplified to certain level and supplies output by pre-amplification circuit 1, for follow-up
Processing of circuit；Frequency overlapped-resistable filter 1 filters some useless high fdrequency components and some other spurious signal in signal, prevents
Spectral aliasing is being produced after AD conversion module 1；AD conversion module 1 is used for converting analog signals into digital signal.
Described DSP processing unit 3 uses multichannel NLMS algorithm in self-adaprive predictive control to be automatically adjusted
Relevant parameter, follows practical situation change, it is achieved optimal neutralization effect.
Described D/A conversion module 10 converts digital signals into analogue signal；Smoothing filter 11 eliminates analogue signal
Ladder, constructs the low frequency signal that waveform is smooth；12 faint signals of telecommunication of power amplifier amplify to drive speaker 13
Go out sound.
Described error pick-up 14 is used for gathering residual noise signal to realize acoustic-electric conversion；Pre-amplification circuit 2 15
The signal of telecommunication after conversion is amplified to certain level process for subsequent conditioning circuit；Frequency overlapped-resistable filter 2 16 filters in signal useless
High fdrequency component prevent by after AD conversion module 2 17 produce spectral aliasing.
The noise that primary noise source 1 produces propagates formation sound field in space, and when fan rotates, rotational noise and wadding stream are made an uproar
Sound forms spherical wave in space；In order to expand noise cancellation scope, whole device selects multichannel active noise control system,
Offset the noise energy in region, desired dead zone by the speaker 13 of fan-shaped array, formed without sound area, by controlling sector
Angle just can control the size without sound area.
In the present invention, DSP processing unit 3 uses general DSP device.
Reference sensor 6 in primary noise collecting unit 2 sends into pre-amplification circuit 1 after gathering primary noise signal
Carrying out signal amplification, the signal after amplification passes sequentially through frequency overlapped-resistable filter 1 and AD conversion module 1 and analogue signal is converted
For digital signal, it is then sent to DSP processing unit 3 and carries out adaptive noise cancellation process；Signal after having processed is by secondary
Level noise output unit 4, i.e. passes sequentially through D/A conversion module 10, smoothing filter 11 and power amplifier 12 and small-signal is entered
Row amplifies to drive speaker 13 to send, the noise of opposite in phase identical with primary noise amplitude；Residual noise collecting unit 5 is used
Gather the residual noise signal after counteracting, continue to deliver to DSP process after being amplified, be converted into digital signal by this residue signal
Unit updates the weights of sef-adapting filter to adapt to the change of actual environment.The method using multichannel active noise controlling
Design the noise of the generations such as fan that this device can offset in daily life in room, air-conditioning, refrigerator, thus reduce low frequency and make an uproar
The harm etc. of the neural fatigue that sound brings to people.
When this utility model is used for offsetting fan noise in room, gathers with reference sensor 6 near noise source 1 and make an uproar
Acoustical signal；Signal after acquisition process is input to DSP processing unit 3 by primary noise collecting unit 2 to be carried out at adaptive-filtering
Reason produces, the noise of opposite in phase identical with noise amplitude；Process complete after two-way output signal by respective secondary noise
Output unit 4 drives two speakers 13 to send antinoise respectively and offsets with primary noise；Residual noise after counteracting by
Two-way error pick-up 14 gathers, and is input to dsp processor 7 after being processed by two-way residual noise collecting unit 5 respectively
In be filtered the renewal of device weights, automatic regulating system parameter, follow actual scene change, amplitude peak reduces noise.
Claims (5)
1. a Smart Home denoising device, it is characterised in that include at the DSP being connected with primary noise collecting unit (2)
Reason unit (3), DSP processing unit (3) is connected with secondary noise output unit (4), residual noise collecting unit (5) respectively.
A kind of Smart Home denoising device the most according to claim 1, it is characterised in that described primary noise collection
Unit (2) includes reference sensor (6), and reference sensor (6) is by pre-amplification circuit one (7) and frequency overlapped-resistable filter one
(8) being connected, frequency overlapped-resistable filter one (8) is connected with AD conversion module one (9).
A kind of Smart Home denoising device the most according to claim 1, it is characterised in that described secondary noise output is single
Unit (4) includes D/A conversion module (10), and D/A conversion module (10) is connected with power amplifier (12) by smoothing filter (11),
Power amplifier (12) is connected with speaker (13).
A kind of Smart Home denoising device the most according to claim 1, it is characterised in that described residual noise gathers single
Unit (5) includes error pick-up (14), and error pick-up (14) passes through pre-amplification circuit two (15) and frequency overlapped-resistable filter
Two (16) are connected, and frequency overlapped-resistable filter two (16) is connected with DSP processing unit (3) by AD conversion module two (17).
A kind of Smart Home denoising device the most according to claim 3, it is characterised in that described speaker (13) according to
Fan-shaped array is above the quiet district that error pick-up (14) forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620789851.3U CN205881451U (en) | 2016-07-26 | 2016-07-26 | Device of making an uproar is removed to intelligence house |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620789851.3U CN205881451U (en) | 2016-07-26 | 2016-07-26 | Device of making an uproar is removed to intelligence house |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205881451U true CN205881451U (en) | 2017-01-11 |
Family
ID=57697750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620789851.3U Expired - Fee Related CN205881451U (en) | 2016-07-26 | 2016-07-26 | Device of making an uproar is removed to intelligence house |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205881451U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107452368A (en) * | 2017-08-14 | 2017-12-08 | 海尔优家智能科技（北京）有限公司 | The noise-reduction method and device of a kind of home appliance |
| CN107564508A (en) * | 2017-10-17 | 2018-01-09 | 潘跃升 | A kind of active noise reduction control system and the method based on the system |
| CN107644634A (en) * | 2017-08-01 | 2018-01-30 | 柴世军 | Environmental audio denoising device |
| CN109119060A (en) * | 2018-08-09 | 2019-01-01 | 广州小鹏汽车科技有限公司 | A kind of reduction method and system applied to automobile |
| CN110822695A (en) * | 2019-11-27 | 2020-02-21 | 广东美的制冷设备有限公司 | Noise reduction method and device for air conditioner, air conditioner and electronic equipment |
| CN112489615A (en) * | 2020-10-29 | 2021-03-12 | 宁波方太厨具有限公司 | Noise reduction method, noise reduction system, noise reduction device and range hood |
| CN113077778A (en) * | 2020-01-03 | 2021-07-06 | 中车唐山机车车辆有限公司 | Active noise reduction system of motor train unit |
| CN113342131A (en) * | 2021-02-25 | 2021-09-03 | 深圳市智信新信息技术有限公司 | Fan noise reduction method of notebook computer and notebook computer |
-
2016
- 2016-07-26 CN CN201620789851.3U patent/CN205881451U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107644634A (en) * | 2017-08-01 | 2018-01-30 | 柴世军 | Environmental audio denoising device |
| CN107452368A (en) * | 2017-08-14 | 2017-12-08 | 海尔优家智能科技（北京）有限公司 | The noise-reduction method and device of a kind of home appliance |
| CN107564508A (en) * | 2017-10-17 | 2018-01-09 | 潘跃升 | A kind of active noise reduction control system and the method based on the system |
| CN109119060A (en) * | 2018-08-09 | 2019-01-01 | 广州小鹏汽车科技有限公司 | A kind of reduction method and system applied to automobile |
| CN110822695A (en) * | 2019-11-27 | 2020-02-21 | 广东美的制冷设备有限公司 | Noise reduction method and device for air conditioner, air conditioner and electronic equipment |
| CN113077778A (en) * | 2020-01-03 | 2021-07-06 | 中车唐山机车车辆有限公司 | Active noise reduction system of motor train unit |
| CN113077778B (en) * | 2020-01-03 | 2023-01-10 | 中车唐山机车车辆有限公司 | Active noise reduction system of motor train unit |
| CN112489615A (en) * | 2020-10-29 | 2021-03-12 | 宁波方太厨具有限公司 | Noise reduction method, noise reduction system, noise reduction device and range hood |
| CN113342131A (en) * | 2021-02-25 | 2021-09-03 | 深圳市智信新信息技术有限公司 | Fan noise reduction method of notebook computer and notebook computer |
| CN113342131B (en) * | 2021-02-25 | 2022-06-24 | 荣耀终端有限公司 | Fan noise reduction method of notebook computer and notebook computer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205881451U (en) | Device of making an uproar is removed to intelligence house | |
| CN108088064B (en) | Active noise reduction device arranged on ventilation pipe orifice and capable of realizing acoustic interaction and control method | |
| CN103035234B (en) | Active noise reducing device and method and the noise control system for smoke exhaust ventilator | |
| CN108916952B (en) | Range hood with three-dimensional space sound field noise reduction device and noise reduction method | |
| CN205425376U (en) | Take active noise reduction's new fan | |
| CN206179506U (en) | Device is subductd to unmanned aerial vehicle noise | |
| CN104217712B (en) | The active noise reducing device and rock drilling machine of engineering machinery operating room | |
| CN105848056A (en) | Novel active noise reduction method | |
| CN109036368A (en) | A kind of external device for actively eliminating noise | |
| CN204014060U (en) | There is auditory prosthesis and system and the application of autonomous adjusting function | |
| CN107289482A (en) | A kind of lampblack absorber self study automatic noise reduction system and method | |
| CN107768119A (en) | A kind of EHV power transformer active noise reduction system | |
| CN111536587A (en) | Air conditioner | |
| CN104835487A (en) | Household active noise reduction system and noise reduction control method thereof | |
| CN106356050A (en) | Automatic noise elimination method in teaching scene | |
| CN110856070B (en) | Initiative sound insulation earmuff that possesses pronunciation enhancement function | |
| CN106340306A (en) | Method and device for improving speech recognition degree | |
| CN105913836A (en) | Fixed-point real time noise reduction method based on DSP | |
| TW201712668A (en) | A robot indoor noises control system | |
| CN108260037A (en) | Voice acquisition device and home appliance | |
| CN109741728A (en) | A kind of active noise reduction system and method based on waveform feedback | |
| CN209199594U (en) | A kind of external device for actively eliminating noise | |
| CN112581931A (en) | Indoor noise reduction method and system applied to thermal power plant | |
| CN110660379A (en) | Noise processing method and device and air conditioner | |
| CN206625922U (en) | A kind of gas handling system of active noise reduction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170111 Termination date: 20170726 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |