CN105318490A - Control method and device for noise reduction of air conditioner - Google Patents
Control method and device for noise reduction of air conditioner Download PDFInfo
- Publication number
- CN105318490A CN105318490A CN201410329030.7A CN201410329030A CN105318490A CN 105318490 A CN105318490 A CN 105318490A CN 201410329030 A CN201410329030 A CN 201410329030A CN 105318490 A CN105318490 A CN 105318490A
- Authority
- CN
- China
- Prior art keywords
- signal
- sound source
- output signal
- conditioner
- air
- 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.)
- Pending
Links
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method and device for noise reduction of an air conditioner. The control method for noise reduction of the air conditioner comprises the steps that a digital reference signal of a primary sound source in the air conditioner is acquired; a control command is generated through the digital reference signal, and used for controlling a secondary sound source in the air conditioner to generate an output signal, and the output signal is used for restraining noise generated by the primary sound source; the secondary sound source is controlled to generate an output signal through the control command. By means of the control method and device, the problem that in the related technology, the noise reduction effect on medium-frequency stage noise and low-frequency stage noise is not obvious is solved.
Description
Technical field
The present invention relates to airconditioning control field, in particular to a kind of control method for air-conditioner noise reduction and device.
Background technology
At present, in the related, in order to carry out Noise measarement to air-conditioner, following several active noise reduction scheme is provided:
Scheme one, active noise controlling is carried out to tumbler, the program utilizes the corresponding relation of rotating speed and the transfer function prestored, and is determined the sound wave of secondary sound source by the operation transfer function corresponding with rotating speed and reference signal, and carrys out restraint speckle by the sound wave controlling secondary sound source.There is following shortcoming in the program: the database that 1) first must have transfer function and rotating speed, and in fact transfer function and rotating speed itself generally do not exist positive connection; 2) can only be applied in one dimension pipeline, there is limitation in accommodation.
Scheme two, active noise controlling is carried out to compressor, the program needs to arrange a cavity at compressor periphery, restraint speckle is carried out by the amplitude and phase place that control the sound wave of secondary sound source in real time, there is following shortcoming in the program: 1) need by analog signal or carry out active noise reduction in a frequency domain, and analog signal noise reduction mode does not have too many engineer applied to be worth; 2) in active noise reduction, the transfer function between reference signal and secondary sound source is used; 3) noise reduction can only be carried out to compressor.
In the related, in order to carry out Noise measarement to air-conditioner, passive noise reduction schemes is additionally provided.And passive noise reduction schemes is obvious to the noise reduction of high band noise, the noise reduction of centering, low frequency range noise is not obvious, and adopt passive noise reduction centering, low-frequency noise is when carrying out noise reduction, can increase the physical dimension of passive denoising device.
For the unconspicuous problem of noise reduction of centering, low frequency range noise in correlation technique, at present effective solution is not yet proposed.
Summary of the invention
Main purpose of the present invention is to provide a kind of control method for air-conditioner noise reduction and device, to solve the unconspicuous problem of noise reduction of centering in correlation technique, low frequency range noise.
To achieve these goals, according to an aspect of the present invention, a kind of control method for air-conditioner noise reduction is provided.The method comprises: the digital reference signal obtaining the elementary sound source in air-conditioner; Generate control command according to digital reference signal, wherein, control command produces output signal for the secondary sound source controlled in air-conditioner, outputs signal the noise for suppressing elementary sound source to send; And control secondary sound source generation output signal by control command.
Further, after being controlled secondary sound source by control command and producing output signal, this control method also comprises: obtain error signal; And according to error signal correction output signal, obtain revised output signal.
Further, obtain error signal to comprise: the current output signal obtaining secondary sound source; Obtain the transfer function of current output signal and error signal; Calculate according to current output signal and transfer function, obtain the acoustical signal of the sound field of secondary sound source; And using acoustical signal as error signal, or, obtain the desired signal of error pick-up self; Detect the output signal that secondary sound source is delivered to error pick-up; And calculate according to desired signal and the output signal being delivered to error pick-up, obtain error signal.
Further, while acquisition error signal, this control method also comprises: the filtering signal obtaining digital reference signal, and wherein, filtering signal is the convolution signal of digital reference signal and transfer function; Obtain first weighing vector of digital reference signal in the first moment; And determine the second weighing vector according to error signal, filtering signal and the first weighing vector, second weighing vector is the weighing vector of digital reference signal in the second moment, and the second moment was the moment after the first moment, wherein, according to the second weighing vector correction output signal, obtain revised output signal, and produce revised output signal by control command control secondary sound source.
Further, before the digital reference signal obtaining the elementary sound source in air-conditioner, this control method also comprises: the analog of detection of primary sound source; And analog is converted to digital reference signal.
Further, the digital reference signal of the elementary sound source obtained in air-conditioner comprises: the digital tach signal obtaining the blower fan of air-conditioner; And/or the digital acceleration signal of the compressor of acquisition air-conditioner; And/or obtain the digital tach signal of indoor set or the acceleration signal of air-conditioner.
To achieve these goals, according to a further aspect in the invention, a kind of control device for air-conditioner noise reduction is provided.This control device comprises: the first acquiring unit, for obtaining the digital reference signal of the elementary sound source in air-conditioner; Generation unit, for generating control command according to digital reference signal, wherein, control command produces output signal for the secondary sound source controlled in air-conditioner, outputs signal the noise for suppressing elementary sound source to send; And control unit, produce output signal for controlling secondary sound source by control command.
Further, this control device also comprises: second acquisition unit, for after being controlled secondary sound source by control command and producing output signal, obtains error signal; And amending unit, for according to error signal correction output signal, obtain revised output signal.
Further, second acquisition unit comprises: the first acquisition module, for obtaining the current output signal of secondary sound source; Second acquisition module, for obtaining the transfer function of current output signal and error signal; First computing module, for calculating according to current output signal and transfer function, the acoustical signal of the sound field of secondary sound source; And determination module, for using acoustical signal as error signal, or the 3rd acquisition module, for obtaining the desired signal of error pick-up self; Detection module, is delivered to the output signal of error pick-up for detecting secondary sound source; And second computing module, for calculating according to desired signal and the output signal that is delivered to error pick-up, obtain error signal.
Further, this control device also comprises: the 3rd acquiring unit, and for while acquisition error signal, obtain the filtering signal of digital reference signal, wherein, filtering signal is the convolution signal of digital reference signal and transfer function; 4th acquiring unit, for obtaining first weighing vector of digital reference signal in the first moment; And determining unit, for determining the second weighing vector according to error signal, filtering signal and the first weighing vector, second weighing vector is the weighing vector of digital reference signal in the second moment, and the second moment was the moment after the first moment, wherein, amending unit also for according to the second weighing vector correction output signal, obtains revised output signal, and control unit also produces revised output signal for controlling secondary sound source by control command.
Further, this control device also comprises: detecting unit, for before the digital reference signal obtaining the elementary sound source in air-conditioner, and the analog of detection of primary sound source; And converting unit, for analog is converted to digital reference signal.
Further, the first acquiring unit comprises: the 4th acquisition module, for obtaining the digital tach signal of the blower fan of air-conditioner; And/or the 5th acquisition module, for obtaining the digital acceleration signal of the compressor of air-conditioner; And/or the 6th acquisition module, for obtaining digital tach signal or the acceleration signal of the indoor set of air-conditioner.
By the present invention, adopt the digital reference signal of the elementary sound source obtained in air-conditioner; Generate control command according to digital reference signal, wherein, control command produces output signal for the secondary sound source controlled in air-conditioner, outputs signal the noise for suppressing elementary sound source to send; And control secondary sound source generation output signal by control command, solve the unconspicuous problem of noise reduction of centering in correlation technique, low frequency range noise, and then reach the obvious effect of noise reduction of centering, low frequency range noise.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the control device for air-conditioner noise reduction according to the embodiment of the present invention;
Fig. 2 is the schematic diagram of the preferred control device for air-conditioner noise reduction according to the embodiment of the present invention;
Fig. 3 is the signal flow diagram of the active noise reduction system according to the embodiment of the present invention;
Fig. 4 is the schematic diagram of the active noise reduction according to the embodiment of the present invention;
Fig. 5 is the another preferred schematic diagram for the control device of air-conditioner noise reduction according to the embodiment of the present invention;
Fig. 6 is the schematic diagram of the digital signal processor according to the embodiment of the present invention;
Fig. 7 is the schematic diagram of the blower fan noise reduction system according to the embodiment of the present invention;
Fig. 8 is the schematic diagram of the compressor noise-reduction system according to the embodiment of the present invention;
Fig. 9 is the schematic diagram of the indoor set noise reduction system according to the embodiment of the present invention;
Figure 10 is the flow chart of the control method for air-conditioner noise reduction according to the embodiment of the present invention;
Figure 11 is the flow chart of the preferred control method for air-conditioner noise reduction according to the embodiment of the present invention; And
Figure 12 is the another preferred flow chart for the control method of air-conditioner noise reduction according to the embodiment of the present invention.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Better the present invention program is understood in order to make those skilled in the art, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment obtained under those of ordinary skill in the art do not make creative work prerequisite, all should belong to protection scope of the present invention.
It should be noted that, term " first ", " second " etc. in description of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, and intention is to cover not exclusive comprising.
According to embodiments of the invention, provide a kind of control device for air-conditioner noise reduction, this control device being used for air-conditioner noise reduction is for carrying out active noise reduction to air-conditioner.
Fig. 1 is the schematic diagram of the control device for air-conditioner noise reduction according to the embodiment of the present invention.
As shown in Figure 1, this control device comprises: the first acquiring unit 10, generation unit 20 and control unit 30.
First acquiring unit 10 may be used for the digital reference signal of the elementary sound source obtained in air-conditioner.
Before the digital reference signal obtaining the elementary sound source in air-conditioner, first can obtain the analog of the elementary sound source in air-conditioner, then by analog signal discretization, just can obtain the digital reference signal corresponded.Particularly, can be processed analog by signal processor, obtain digital reference signal.
It should be noted that, it is basic because be there is structural vibration that construct noise produces, and therefore, in air-conditioner, any parts that can produce structural vibration can as elementary sound source.So-called elementary sound source is noise source.
Such as, noise source can comprise off-premises station and indoor set, and off-premises station noise source can comprise blower fan and compressor etc.Wherein, because construct noise is relevant to structural vibration, the rotational noise of blower fan is relevant to the rotating speed of blower fan, therefore, in embodiments of the present invention, reference signal (comprising digital reference signal and analog) can be structure vibration signals and tach signal etc.Such as, reference signal can be the tach signal of blower fan, the acceleration signal of compressor and the tach signal of indoor set or the acceleration signal etc. of indoor set.It should be noted that, why tach signal and acceleration signal can as with reference to signal being the frequency characteristic that can determine noise because of them.
Particularly, can pass through the analog that detector (as sensor) obtains the elementary sound source in air-conditioner, wherein, detector can be reference signal sensor.Such as, when elementary sound source is blower fan, rotation speed of fan signal can be obtained by speed probe; When elementary sound source is compressor, the acceleration signal of compressor can be obtained by acceleration transducer; When elementary sound source is indoor set, the tach signal of indoor set can be obtained by speed probe, or the acceleration signal of indoor set can be obtained by acceleration transducer.Aforesaid every speed signal and acceleration signal are all reference signals.It should be noted that, in embodiments of the present invention, can the analog of elementary sound source in Real-time Obtaining air-conditioner, and according to predeterminated frequency, analog is sampled, obtain corresponding digital reference signal.
Particularly, corresponding detector (as sensor) can not be set in air-conditioner, at this moment, the analog of elementary sound source can be obtained by other means, such as, the reference signal such as rotating speed and acceleration can be obtained by the control device of air-conditioner self.
Generation unit 20 may be used for generating control command according to digital reference signal.
Wherein, control command produces output signal for the secondary sound source controlled in air-conditioner, outputs signal the noise for suppressing elementary sound source to send.
Particularly, the control device in air-conditioner can compute weighted according to the length of digital reference signal and the weighing vector preset, and obtains the output signal of secondary sound source, and produces control command according to output signal.When control command is sent to secondary sound source by control device, secondary sound source can run aforesaid output signal according to control command.Wherein, the length of weighing vector is identical with the length of digital reference signal.
Such as, suppose that the length of digital reference signal X (n) and weighing vector W (n) is n, and n=1,2,3 ..., wherein, digital reference signal X (n) is input signal, then the output signal of secondary sound source can calculate y (n)=W (n) X by following formula
t(n).
During due to secondary sound source operation aforesaid output signal, the vibration of certain frequency may be produced, and the vibration of certain frequency can cause secondary sound source to send specific sound wave, wherein, the phase place of this specific sound wave is contrary with the phase place of the sound wave that noise source produces, but the size of aforementioned two kinds of sound waves can be identical.Like this, output signal just may be used for the noise suppressing elementary sound source to send, and reaches the object controlling air-conditioning noise reduction.It should be noted that, secondary sound source can be the loudspeaker etc. be arranged in air-conditioner.
Control unit 30 may be used for controlling secondary sound source by control command and produces output signal.
Pass through the embodiment of the present invention, owing to adopting digital reference signal, therefore wide accommodation, applicable scene is many, and because secondary sound source can according to control command, run the rotating speed corresponding with control command and/or acceleration, thus cause object vibration, produce specific sound wave or specific sound field, wherein, this specific sound wave or this specific sound field can restraint speckle sources (i.e. the sound wave that produces of elementary sound source or sound field), therefore, reach the effect of obvious air-conditioner active noise reduction.
In embodiments of the present invention, active noise reduction techniques may be used in the indoor set of air-conditioner and off-premises station, low-frequency noise carries out noise reduction, and carries out noise reduction to the indoor set of air-conditioner and the high-frequency noise of off-premises station.Preferably, active noise reduction techniques may be used in the indoor set of air-conditioner and off-premises station, low-frequency noise carries out noise reduction, and noise reduction is obvious, such as, can make the noise reduction 6-10 decibel of air-conditioner.
Fig. 2 is the schematic diagram of the preferred control device for air-conditioner noise reduction according to the embodiment of the present invention.
As shown in Figure 2, this embodiment can as preferred embodiment embodiment illustrated in fig. 1, the control device for air-conditioner noise reduction of this embodiment, except comprising the first acquiring unit 10 of previous embodiment, generation unit 20 and control unit 30, also comprises second acquisition unit 40 and amending unit 50.
First acquiring unit 10, generation unit 20 and the effect of control unit 30 and identical in previous embodiment, do not repeat them here.
Second acquisition unit 40 may be used for, after being controlled secondary sound source by control command and producing output signal, obtaining error signal.
In embodiments of the present invention, after being controlled secondary sound source by control command and producing output signal, error signal can be obtained in the following manner:
Mode one, by the mode of error pick-up direct-detection, the error signal that this kind of mode obtains can comprise two parts: the desired signal part of error pick-up itself, namely, error pick-up detects the acoustical signal part of elementary sound source, and the acoustical signal part of the sound field of secondary sound source that error pick-up detects.Wherein, adopt in this way, can simple and fast obtain error signal, and save a large amount of computational process, save time cost.
Mode two, by first detecting transfer function, then calculating in the output signal in a upper moment according to the transfer function detected and primary and secondary sound source, obtaining the size of error signal, that is, the mode of indirect detection.Wherein, adopt in this way, save error pick-up, the structure of simplification device, and save hardware cost.
Amending unit 50 may be used for, according to error signal correction output signal, obtaining revised output signal.
Particularly, the error signal of acquisition can be fed back to controller of air conditioner, and according to the mapping relations of the error signal preset and weighing vector in controller, first revise each in weighing vector, revise the output signal of secondary sound source corresponding with it again according to each in the weighing vector that have modified, thus obtain revised output signal.
Preferably, any one in weighing vector can be the iteration function of the filtering signal of its last item and error signal and convergence factor and reference signal (can be the input signal of control device at this).
Pass through the embodiment of the present invention, owing to only adopting the output signal determined by control command, farthest can not suppress the noise that elementary sound source (i.e. noise source) produces, therefore, error signal is adopted to revise output signal by revising, and secondary sound source runs this correction output signal, the noise that elementary sound source (i.e. noise source) can be suppressed greatly to produce, reaches the more obvious object of air-conditioner noise reduction.
Preferably, in embodiments of the present invention, second acquisition unit 40 can comprise: the first acquisition module, the second acquisition module, the first computing module and determination module.
First acquisition module may be used for the current output signal obtaining secondary sound source.Particularly, according to the current output signal of the control command determination secondary sound source corresponding with current output signal, or the current output signal of secondary sound source can immediately be detected by sensor.
Second acquisition module may be used for the transfer function obtaining current output signal and error signal.Particularly, the transfer function preset can be obtained from store list, wherein, store list is database table, or first can detect output signal and input signal, then carry out calculating according to output signal and input signal and obtain transfer function, wherein, output signal herein can be the output signal of secondary sound source, and input signal can the reference signal of elementary sound source.
First computing module may be used for calculating according to current output signal and transfer function, obtains the acoustical signal of the sound field of secondary sound source.Particularly, can by current output signal and transfer function to be carried out convolution algorithm, convolution results is the acoustical signal of the sound field of secondary sound source.
Determination module may be used for acoustical signal as error signal.
Like this, aforementioned error signal can be adopted to revise aforesaid weighing vector, obtain revised weighing vector, and then utilize revised weighing vector to revise the output signal of secondary sound source.It should be noted that, namely the mode of the acquisition error signal described in mode one is the mode of aforesaid indirect detection.
Or preferably, in embodiments of the present invention, second acquisition unit 40 can comprise: the 3rd acquisition module, detection module, the second computing module.
3rd acquisition module may be used for the desired signal obtaining error pick-up self.Error pick-up can obtain self desired signal by the mode detecting self.
Detection module may be used for detecting the output signal that secondary sound source is delivered to error pick-up.Wherein, secondary sound source is delivered to the function that the output signal of error pick-up can be the output signal of secondary sound source and the transfer function between secondary sound source and error pick-up.Such as, secondary sound source is delivered to the output signal of error pick-up can be the output signal of secondary sound source and the transfer function convolution between secondary sound source and error pick-up.Particularly, can go out by error pick-up direct-detection the output signal that secondary sound source is delivered to error pick-up.
Second computing module may be used for calculating according to desired signal and the output signal being delivered to error pick-up, obtains error signal.Wherein, error signal here can be the superposition of desired signal and the output signal being delivered to error pick-up.
Like this, the first error signal or the second error signal can be adopted to revise aforesaid weighing vector, obtain revised weighing vector, and then utilize revised weighing vector to revise the output signal of secondary sound source.It should be noted that, namely the mode of the error signal of the elementary sound source of the acquisition described in mode one and secondary sound source is the mode of aforesaid indirect detection.Namely the mode of the error signal of the elementary sound source of the acquisition described in mode two and secondary sound source is the aforesaid mode by error pick-up direct-detection.
Such as, when loudspeaker are as secondary sound source, on the indoor set that loudspeaker can be arranged on air-conditioner and off-premises station, as it can on the blower fan of machine disposed in the outdoor and compressor, wherein, the operation principle of the output signal noise reduction of the loudspeaker that have modified can realize according to following formula:
The output signal of loudspeaker: y (n)=W (n) X
t(n) (1)
Weighing vector: W (n+1)=W (n)-2ue (n) r (n) (2)
Error signal: e (n)=d (n)+s (n) (3)
Secondary sound source is delivered to the output signal of error pick-up: s (n)=y (n) * h
s(n) (4)
Filtering signal: r (n)=X (n) * h
s(n) (5)
Wherein, the output signal y (n) of loudspeaker determines the size of the acoustic pressure that loudspeaker send.The output signal y (n) of loudspeaker is undertaken superposing obtaining by reference signal (as tach signal, the acceleration signal etc.) X (n) of weighing vector W (n) and reference signal sensor detection (as speed probe, acceleration transducer etc.), the length of X (n) and W (n) can be L, L is natural number, W (n) can be designated as [w1 (n), w2 (n), wL (n)], X (n) is designated as [x (n), x (n-1) ... x (n-L+1)].Weighing vector W (n) can preset, or it can carry out correction according to error signal and obtain on the basis of the vector preset.Weighing vector W (n+1) can be obtained by weighted vector coefficient W (n) of last item, filtering signal r (n), convergence coefficient or convergence factor u and error signal e (n) correction.Filtering signal r (n) can be obtained by Filtered-X LMS algorithm by reference signal, compared with existing correlation technique, Filtered-X LMS algorithm considers the impact of the transfer function between secondary sound source to error pick-up, thus makes the noise reduction of air-conditioner more obvious.Error signal e (n) is desired signal d (n), and secondary sound source is delivered to the superposition of the output signal s (n) of error pick-up.As shown in Figure 3, the principle of its active noise reduction as shown in Figure 4 for the expression of each signal above-mentioned and transfer function.Wherein, in Fig. 4,1 is noise source (elementary sound source), and 2 is reference signal sensor (speed probe or acceleration transducer), and 3 is controller, and 4 is loudspeaker (elementary sound sources), and 5 is error pick-up.
Fig. 5 is the another preferred schematic diagram for the control device of air-conditioner noise reduction according to the embodiment of the present invention.
As shown in Figure 5, this embodiment can as preferred embodiment embodiment illustrated in fig. 2, the control device for air-conditioner noise reduction of this embodiment, except comprising the first acquiring unit 10 of previous embodiment, generation unit 20, control unit 30, second acquisition unit 40 and amending unit 50, also comprises the 3rd acquiring unit 60, the 4th acquiring unit 70 and determining unit 80.
First acquiring unit 10, generation unit 20, control unit 30 and the effect of second acquisition unit 40 and identical in previous embodiment, do not repeat them here.
3rd acquiring unit 60 may be used for, while the error signal obtaining elementary sound source and secondary sound source, obtaining the filtering signal of digital reference signal.
Particularly, while acquisition error signal, the filtering signal of digital reference signal is obtained.Wherein, filtering signal is the convolution signal of digital reference signal and transfer function.Such as, filtering signal can be obtained by Filtered-X LMS algorithm.
4th acquiring unit 70 may be used for obtaining first weighing vector of digital reference signal in the first moment.
Determining unit 80 may be used for determining the second weighing vector according to error signal, filtering signal and the first weighing vector.
Second weighing vector is the weighing vector of digital reference signal in the second moment, and the second moment was the moment after the first moment.Wherein, the second weighing vector can be calculated by aforesaid weighing vector formula (2): W (n+1)=W (n)-2ue (n) r (n), W (n) represents the first weighing vector.
Wherein, amending unit 50 can also be used for, according to the second weighing vector correction output signal, obtaining revised output signal.Control unit 30 can also control secondary sound source by control command and produce revised output signal.Concrete makeover process, as previous embodiment, does not repeat them here.Revise output signal by revising weighing vector, method is simple, and the noise that elementary sound source (i.e. noise source) can be suppressed greatly to produce, reach the more obvious object of air-conditioner noise reduction.
Preferably, in embodiments of the present invention, this control device can also comprise: detecting unit and converting unit.
Detecting unit may be used for before the digital reference signal obtaining the elementary sound source in air-conditioner, the analog of detection of primary sound source.
Converting unit may be used for analog to be converted to digital reference signal.
Particularly, the analog of detection of primary sound source can be carried out by the reference signal sensor be arranged in air-conditioner, such as, detect the rotating speed of blower fan and/or the rotating speed of indoor set by speed probe, and detect the acceleration etc. of compressor or indoor set by acceleration transducer.
After above-mentioned arbitrary analog being detected, analog can be converted to digital reference signal being arranged in the signal processor in air-conditioner.
Wherein, digital signal processor is the signal processor of active noise reduction, and as shown in Figure 6, digital signal processor can comprise audio coding decoding chip, dsp chip and power amplifier.5 is error pick-up, it by Real-time Collection to noise signal transmission to audio coding decoding chip carry out decoding process, obtain decoded signal, this decoded signal through audio coding decoding chip McASP port and transform through A/D, obtain data signal, this digital data transmission is to DSP, and utilize Filtered-X LMS algorithm to carry out filtering process in dsp, obtain filtering signal, this filtering signal carries out amplification process by AUDIOOUT port transmission to the power amplifier of audio coding decoding chip again, and exports this amplifying signal.
Preferably, in embodiments of the present invention, the first acquiring unit 10 can comprise: the 4th acquisition module and/or the 5th acquisition module and/or and/or the 6th acquisition module.4th acquisition module may be used for the digital tach signal of the blower fan obtaining air-conditioner.5th acquisition module may be used for the digital acceleration signal of the compressor obtaining air-conditioner.6th acquisition module may be used for digital tach signal or the acceleration signal of the indoor set obtaining air-conditioner.
Such as, as shown in Figure 7, in blower fan noise reduction system, A1 is speed probe, and it can be arranged on the flabellum of blower fan fan, and A1 may be used for the rotating speed detecting fan, and wherein, the rotating speed of fan determines the frequency characteristic of blower fan rotational noise; B1 is error pick-up, and it can be arranged on the impeller of blower fan fan, B1 may be used for detecting sound that fan noise and loudspeaker send superimposed after the size of sound field; C1 is loudspeaker, and it may be used for sounding, to offset the noise that blower fan sends, reaches the object of noise reduction.Wherein, the signal of A1, B1 and C1 processes in dsp.
Such as, as shown in Figure 8, in compressor noise-reduction system, A2 is acceleration transducer, it can be arranged in the primary importance of compressor, and A2 may be used for the acceleration detecting compressor, wherein, the acceleration of compressor determines the frequency characteristic of vibration of compressor noise, it should be noted that, the noise of structural radiation is except being caused by vibration of compressor, and the miscellaneous part vibration that can also be caused by compressor causes, wherein, compressor is noise source (elementary sound source); B2 is error pick-up, and it can be arranged in the second place of compressor, B2 may be used for detecting sound that compressor noise and loudspeaker send superimposed after the size of sound field; C2 is loudspeaker, and it may be used for sounding, to offset the noise that compressor sends, reaches the object of noise reduction.Wherein, the signal of A2, B2 and C2 processes in dsp.
Such as, as shown in Figure 9, in indoor set noise reduction system, A3 is acceleration transducer or speed probe, it can on the air outlet of machine disposed in the interior, A3 may be used for the acceleration or the rotating speed that detect indoor set, and wherein, the acceleration of indoor set or rotating speed determine the frequency characteristic of indoor set vibration noise; B3 is error pick-up, B2 may be used for detecting sound that noise of indoor unit and loudspeaker send superimposed after the size of sound field; C3 is loudspeaker, and it may be used for sounding, to offset the noise that indoor set sends, reaches the object of noise reduction.By using A3, a microphone can be eliminated, decrease manufacturing cost.Wherein, the signal of A3, B3 and C3 processes in dsp.
Wherein, if air-conditioner controller itself can obtain tach signal or acceleration signal, then can respectively from Fig. 7 to Fig. 9 A1, A2 and A3 are deleted, that is, A1, A2 and A3 are not set.
According to embodiments of the invention, provide a kind of control method for air-conditioner noise reduction, this control method being used for air-conditioner noise reduction is for carrying out active noise reduction to air-conditioner.It should be noted that, the control method for air-conditioner noise reduction that the embodiment of the present invention provides can be performed by the control device for air-conditioner noise reduction of the embodiment of the present invention, and the control device for air-conditioner noise reduction of the embodiment of the present invention also may be used for the control method for air-conditioner noise reduction performing the embodiment of the present invention.
Figure 10 is the flow chart of the control method for air-conditioner noise reduction according to the embodiment of the present invention.
As shown in Figure 10, the method comprises following step S102 to step S106:
Step S102, obtains the digital reference signal of the elementary sound source in air-conditioner.
Before the digital reference signal obtaining the elementary sound source in air-conditioner, first can obtain the analog of the elementary sound source in air-conditioner, then by analog signal discretization, just can obtain the digital reference signal corresponded.Particularly, can be processed analog by signal processor, obtain digital reference signal.
It should be noted that, it is basic because be there is structural vibration that construct noise produces, and therefore, in air-conditioner, any parts that can produce structural vibration can as elementary sound source.So-called elementary sound source is noise source.
Such as, noise source can comprise off-premises station and indoor set, and off-premises station noise source can comprise blower fan and compressor etc.Wherein, because construct noise is relevant to structural vibration, the rotational noise of blower fan is relevant to the rotating speed of blower fan, therefore, in embodiments of the present invention, reference signal (comprising digital reference signal and analog) can be structure vibration signals and tach signal etc.Such as, reference signal can be the tach signal of blower fan, the acceleration signal of compressor and the tach signal of indoor set or the acceleration signal etc. of indoor set.It should be noted that, why tach signal and acceleration signal can as with reference to signal being the frequency characteristic that can determine noise because of them.
Particularly, can pass through the analog that detector (as sensor) obtains the elementary sound source in air-conditioner, wherein, detector can be reference signal sensor.Such as, when elementary sound source is blower fan, rotation speed of fan signal can be obtained by speed probe; When elementary sound source is compressor, the acceleration signal of compressor can be obtained by acceleration transducer; When elementary sound source is indoor set, the tach signal of indoor set can be obtained by speed probe, or the acceleration signal of indoor set can be obtained by acceleration transducer.Aforesaid every speed signal and acceleration signal are all reference signals.It should be noted that, in embodiments of the present invention, can the analog of elementary sound source in Real-time Obtaining air-conditioner, and according to predeterminated frequency, analog is sampled, obtain corresponding digital reference signal.
Particularly, corresponding detector (as sensor) can not be set in air-conditioner, at this moment, the analog of elementary sound source can be obtained by other means, such as, the reference signal such as rotating speed and acceleration can be obtained by the control device of air-conditioner self.
Step S104, generates control command according to digital reference signal.
Wherein, control command may be used for the secondary sound source controlled in air-conditioner and produces output signal, and output signal may be used for the noise suppressing elementary sound source to send.
Particularly, the control device in air-conditioner can compute weighted according to the length of digital reference signal and the weighing vector preset, and obtains the output signal of secondary sound source, and produces control command according to output signal.When control command is sent to secondary sound source by control device, secondary sound source can run aforesaid output signal according to control command.Wherein, the length of weighing vector is identical with the length of digital reference signal.
Such as, suppose that the length of digital reference signal X (n) and weighing vector W (n) is n, and n=1,2,3 ..., wherein, digital reference signal X (n) is input signal, then the output signal of secondary sound source can calculate y (n)=W (n) X by following formula
t(n).
During due to secondary sound source operation aforesaid output signal, the vibration of certain frequency may be produced, and the vibration of certain frequency can cause secondary sound source to send specific sound wave, wherein, the phase place of this specific sound wave is contrary with the phase place of the sound wave that noise source produces, but the size of aforementioned two kinds of sound waves can be identical.Like this, output signal just may be used for the noise suppressing elementary sound source to send, and reaches the object controlling air-conditioning noise reduction.It should be noted that, secondary sound source can be the loudspeaker etc. be arranged in air-conditioner.
Step S106, controls secondary sound source by control command and produces output signal.
Pass through the embodiment of the present invention, owing to adopting digital reference signal, therefore wide accommodation, applicable scene is many, and because secondary sound source can according to control command, run the rotating speed corresponding with control command and/or acceleration, thus cause object vibration, produce specific sound wave or specific sound field, wherein, this specific sound wave or this specific sound field can restraint speckle sources (i.e. the sound wave that produces of elementary sound source or sound field), therefore, reach the effect of obvious air-conditioner active noise reduction.
In embodiments of the present invention, active noise reduction techniques may be used in the indoor set of air-conditioner and off-premises station, low-frequency noise carries out noise reduction, and carries out noise reduction to the indoor set of air-conditioner and the high-frequency noise of off-premises station.Preferably, active noise reduction techniques may be used in the indoor set of air-conditioner and off-premises station, low-frequency noise carries out noise reduction, and noise reduction is obvious, such as, can make the noise reduction 6-10 decibel of air-conditioner.
Figure 11 is the flow chart of the preferred control method for air-conditioner noise reduction according to the embodiment of the present invention.
As shown in figure 11, this control method being used for air-conditioner noise reduction comprises following step S202 to step S210, and this embodiment can as preferred embodiment embodiment illustrated in fig. 10.
Step S202 to step S206, respectively with step S102 embodiment illustrated in fig. 10 to step S106, do not repeat them here.
Step S208, obtains error signal.
In embodiments of the present invention, after being controlled secondary sound source by control command and producing output signal, the error signal of elementary sound source and secondary sound source can be obtained in the following manner:
Mode one, by the mode of error pick-up direct-detection, the error signal that this kind of mode obtains can comprise two parts: the desired signal part of error pick-up itself, namely, error pick-up detects the acoustical signal part of elementary sound source, and the acoustical signal part of the sound field of secondary sound source that error pick-up detects.Wherein, adopt in this way, can simple and fast obtain error signal, and save a large amount of computational process, save time cost.
Mode two, by first detecting transfer function, then calculating in the output signal in a upper moment according to the transfer function detected and primary and secondary sound source, obtaining the size of error signal, that is, the mode of indirect detection.Wherein, adopt in this way, save error pick-up, the structure of simplification device, and save hardware cost.
Step S210, according to error signal correction output signal, obtains revised output signal.
Particularly, the error signal of acquisition can be fed back to controller of air conditioner, and according to the mapping relations of the error signal preset and weighing vector in controller, first revise each in weighing vector, revise the output signal of secondary sound source corresponding with it again according to each in the weighing vector that have modified, thus obtain revised output signal.
Preferably, any one in weighing vector can be the iteration function of the filtering signal of its last item and error signal and convergence factor and reference signal (can be the input signal of control device at this).
Pass through the embodiment of the present invention, owing to only adopting the output signal determined by control command, farthest can not suppress the noise that elementary sound source (i.e. noise source) produces, therefore, error signal is adopted to revise output signal by revising, and secondary sound source runs this correction output signal, the noise that elementary sound source (i.e. noise source) can be suppressed greatly to produce, reaches the more obvious object of air-conditioner noise reduction.
Preferably, in embodiments of the present invention, the error signal of elementary sound source and secondary sound source can be obtained by following either type:
Mode one:
S2, obtains the current output signal of secondary sound source.Particularly, according to the current output signal of the control command determination secondary sound source corresponding with current output signal, or the current output signal of secondary sound source can immediately be detected by sensor.
S4, obtains the transfer function of current output signal and error signal.Particularly, the transfer function preset can be obtained from store list, wherein, store list is database table, or first can detect output signal and input signal, then carry out calculating according to output signal and input signal and obtain transfer function, wherein, output signal herein can be the output signal of secondary sound source, and input signal can the reference signal of elementary sound source.
S6, calculates according to current output signal and transfer function, obtains the acoustical signal of the sound field of secondary sound source.Particularly, can by current output signal and transfer function to be carried out convolution algorithm, convolution results is the acoustical signal of the sound field of secondary sound source.
S8, using acoustical signal as error signal.
Like this, aforementioned error signal can be adopted to revise aforesaid weighing vector, obtain revised weighing vector, and then utilize revised weighing vector to revise the output signal of secondary sound source.It should be noted that, namely the mode of the acquisition error signal described in mode one is the mode of aforesaid indirect detection.
Mode two:
S10, obtains the desired signal of error pick-up self.Error pick-up can obtain self desired signal by the mode detecting self.
S12, detects the output signal that secondary sound source is delivered to error pick-up.Wherein, secondary sound source is delivered to the function that the output signal of error pick-up can be the output signal of secondary sound source and the transfer function between secondary sound source and error pick-up.Such as, secondary sound source is delivered to the output signal of error pick-up can be the output signal of secondary sound source and the transfer function convolution between secondary sound source and error pick-up.Particularly, can go out by error pick-up direct-detection the output signal that secondary sound source is delivered to error pick-up.
S14, calculates according to desired signal and the output signal being delivered to error pick-up, obtains error signal.Wherein, error signal here can be the superposition of desired signal and the output signal being delivered to error pick-up.
Like this, the first error signal or the second error signal can be adopted to revise aforesaid weighing vector, obtain revised weighing vector, and then utilize revised weighing vector to revise the output signal of secondary sound source.It should be noted that, namely the mode of the error signal of the elementary sound source of the acquisition described in mode one and secondary sound source is the mode of aforesaid indirect detection.Namely the mode of the error signal of the elementary sound source of the acquisition described in mode two and secondary sound source is the aforesaid mode by error pick-up direct-detection.
Such as, when loudspeaker are as secondary sound source, on the indoor set that loudspeaker can be arranged on air-conditioner and off-premises station, as it can on the blower fan of machine disposed in the outdoor and compressor, wherein, the operation principle of the output signal noise reduction of the loudspeaker that have modified can realize according to following formula:
The output signal of loudspeaker: y (n)=W (n) X
t(n) (1)
Weighing vector: W (n+1)=W (n)-2ue (n) r (n) (2)
Error signal: e (n)=d (n)+s (n) (3)
Secondary sound source is delivered to the output signal of error pick-up: s (n)=y (n) * h
s(n) (4)
Filtering signal: r (n)=X (n) * h
s(n) (5)
Wherein, the output signal y (n) of loudspeaker determines the size of the acoustic pressure that loudspeaker send.The output signal y (n) of loudspeaker is undertaken superposing obtaining by reference signal (as tach signal, the acceleration signal etc.) X (n) of weighing vector W (n) and reference signal sensor detection (as speed probe, acceleration transducer etc.), the length of X (n) and W (n) can be L, L is natural number, W (n) can be designated as [w1 (n), w2 (n), wL (n)], X (n) is designated as [x (n), x (n-1) ... x (n-L+1)].Weighing vector W (n) can preset, or it can carry out correction according to error signal and obtain on the basis of the vector preset.Weighing vector W (n+1) can be obtained by weighted vector coefficient W (n) of last item, filtering signal r (n), convergence coefficient or convergence factor u and error signal e (n) correction.Filtering signal r (n) can be obtained by Filtered-X LMS algorithm by reference signal, compared with existing correlation technique, Filtered-X LMS algorithm considers the impact of the transfer function between secondary sound source to error pick-up, thus makes the noise reduction of air-conditioner more obvious.Error signal e (n) is desired signal d (n), and secondary sound source is delivered to the superposition of the output signal s (n) of error pick-up.As shown in Figure 3, the principle of its active noise reduction as shown in Figure 4 for the expression of each signal above-mentioned and transfer function.Wherein, in Fig. 4,1 is noise source (elementary sound source), and 2 is reference signal sensor (speed probe or acceleration transducer), and 3 is controller, and 4 is loudspeaker (elementary sound sources), and 5 is error pick-up.
Figure 12 is the another preferred flow chart for the control method of air-conditioner noise reduction according to the embodiment of the present invention.
As shown in figure 12, this control method being used for air-conditioner noise reduction comprises following step S302 to step S318, and this embodiment can as preferred embodiment embodiment illustrated in fig. 11.
Step S302 to step S308, respectively with step S202 embodiment illustrated in fig. 11 to step S208, do not repeat them here.
Step S310, obtains the filtering signal of digital reference signal.
Particularly, while the error signal obtaining elementary sound source and secondary sound source, the filtering signal of digital reference signal is obtained.Wherein, filtering signal is the convolution signal of digital reference signal and transfer function.Such as, filtering signal can be obtained by Filtered-X LMS algorithm.
Step S312, obtains first weighing vector of digital reference signal in the first moment.
Step S314, determines the second weighing vector according to error signal, filtering signal and the first weighing vector.
Second weighing vector is the weighing vector of digital reference signal in the second moment, and the second moment was the moment after the first moment.Wherein, the second weighing vector can be calculated by aforesaid weighing vector formula (2): W (n+1)=W (n)-2ue (n) r (n), W (n) represents the first weighing vector.
Step S316, according to the second weighing vector correction output signal, obtains revised output signal.
Concrete makeover process, as previous embodiment, does not repeat them here.Revise output signal by revising weighing vector, method is simple, and the noise that elementary sound source (i.e. noise source) can be suppressed greatly to produce, reach the more obvious object of air-conditioner noise reduction.
Step S318, controls secondary sound source by control command and produces revised output signal.
Preferably, in embodiments of the present invention, before the digital reference signal obtaining the elementary sound source in air-conditioner, this control method also comprises:
S16, the analog of detection of primary sound source.
S18, is converted to digital reference signal by analog.
Particularly, the analog of detection of primary sound source can be carried out by the reference signal sensor be arranged in air-conditioner, such as, detect the rotating speed of blower fan and/or the rotating speed of indoor set by speed probe, and detected the acceleration etc. of compressor/or indoor set by acceleration transducer.
After above-mentioned arbitrary analog being detected, analog can be converted to digital reference signal being arranged in the signal processor in air-conditioner.
Wherein, signal processor is the signal processor of active noise reduction, and as shown in Figure 6, signal processor can comprise audio coding decoding chip, dsp chip and power amplifier.5 is error pick-up, it by Real-time Collection to noise signal transmission to audio coding decoding chip carry out decoding process, obtain decoded signal, this decoded signal through audio coding decoding chip McASP port and transform through A/D, obtain data signal, this digital data transmission is to DSP, and utilize Filtered-X LMS algorithm to carry out filtering process in dsp, obtain filtering signal, this filtering signal carries out amplification process by AUDIOOUT port transmission to the power amplifier of audio coding decoding chip again, and exports this amplifying signal.
Preferably, in embodiments of the present invention, the digital reference signal of the elementary sound source obtained in air-conditioner can comprise:
S20, obtains the digital tach signal of the blower fan of air-conditioner.And/or
S22, obtains the digital acceleration signal of the compressor of air-conditioner.And/or
S24, obtains digital tach signal or the acceleration signal of the indoor set of air-conditioner.
That is, the digital reference signal of the elementary sound source obtained in air-conditioner can comprise at least one of S20, S22 and S24.
Such as, as shown in Figure 7, in blower fan noise reduction system, A1 is speed probe, and it can be arranged on the flabellum of blower fan fan, and A1 may be used for the rotating speed detecting fan, and wherein, the rotating speed of fan determines the frequency characteristic of blower fan rotational noise; B1 is error pick-up, and it can be arranged on the impeller of blower fan fan, B1 may be used for detecting sound that fan noise and loudspeaker send superimposed after the size of sound field; C1 is loudspeaker, and it may be used for sounding, to offset the noise that blower fan sends, reaches the object of noise reduction.Wherein, the signal of A1, B1 and C1 processes in dsp.
Such as, as shown in Figure 8, in compressor noise-reduction system, A2 is acceleration transducer, it can be arranged in the primary importance of compressor, and A2 may be used for the acceleration detecting compressor, wherein, the acceleration of compressor determines the frequency characteristic of vibration of compressor noise, it should be noted that, the noise of structural radiation is except being caused by vibration of compressor, and the miscellaneous part vibration that can also be caused by compressor causes, wherein, compressor is noise source (elementary sound source); B2 is error pick-up, and it can be arranged in the second place of compressor, B2 may be used for detecting sound that compressor noise and loudspeaker send superimposed after the size of sound field; C2 is loudspeaker, and it may be used for sounding, to offset the noise that compressor sends, reaches the object of noise reduction.Wherein, the signal of A2, B2 and C2 processes in dsp.
Such as, as shown in Figure 9, in indoor set noise reduction system, A3 is acceleration transducer or speed probe, it can on the air outlet of machine disposed in the interior, A3 may be used for the acceleration or the rotating speed that detect indoor set, and wherein, the acceleration of indoor set or rotating speed determine the frequency characteristic of indoor set vibration noise; B3 is error pick-up, B2 may be used for detecting sound that noise of indoor unit and loudspeaker send superimposed after the size of sound field; C3 is loudspeaker, and it may be used for sounding, to offset the noise that indoor set sends, reaches the object of noise reduction.By using A3, a microphone can be eliminated, decrease manufacturing cost.Wherein, the signal of A3, B3 and C3 processes in dsp.
Wherein, if air-conditioner controller itself can obtain tach signal or acceleration signal, then can respectively from Fig. 7 to Fig. 9 A1, A2 and A3 are deleted, that is, A1, A2 and A3 are not set.
Pass through foregoing description, in embodiments of the present invention, adopt force signal (as tach signal and acceleration signal) as with reference to signal, simplify embodiment, and the active noise reduction system of error free sensor can be built, simplify the structure of active noise reduction system.
It should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing, and, although show logical order in flow charts, but in some cases, can be different from the step shown or described by order execution herein.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculator, they can concentrate on single calculator, or be distributed on network that multiple calculator forms, alternatively, they can realize with the executable program code of calculator, thus, they can be stored and be performed by calculator in memory, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. for a control method for air-conditioner noise reduction, it is characterized in that, comprising:
Obtain the digital reference signal of the elementary sound source in air-conditioner;
Generate control command according to described digital reference signal, wherein, described control command produces output signal, the noise that described output signal sends for suppressing described elementary sound source for the secondary sound source controlled in described air-conditioner; And
Control described secondary sound source by described control command and produce described output signal.
2. control method according to claim 1, is characterized in that, after being controlled described secondary sound source by described control command and producing described output signal, described control method also comprises:
Obtain error signal; And
Output signal according to described error signal correction, obtain revised output signal.
3. control method according to claim 2, is characterized in that, obtains error signal and comprises:
Obtain the current output signal of described secondary sound source;
Obtain the transfer function of described current output signal and described error signal;
Calculate according to described current output signal and described transfer function, obtain the acoustical signal of the sound field of described secondary sound source; And
Using described acoustical signal as described error signal,
Or,
Obtain the desired signal of error pick-up self;
Detect the output signal that described secondary sound source is delivered to described error pick-up; And
Calculate according to described desired signal and the described output signal being delivered to described error pick-up, obtain described error signal.
4. control method according to claim 2, is characterized in that, while described error signal, described control method also comprises:
Obtain the filtering signal of described digital reference signal, wherein, described filtering signal is the convolution signal of described digital reference signal and transfer function;
Obtain first weighing vector of described digital reference signal in the first moment; And
The second weighing vector is determined according to described error signal, described filtering signal and described first weighing vector, described second weighing vector is the weighing vector of described digital reference signal in the second moment, and described second moment is the moment after described first moment
Wherein, output signal according to described second weighing vector correction, obtain revised output signal, and control the described revised output signal of described secondary sound source generation by described control command.
5. control method according to claim 1, is characterized in that, before the digital reference signal obtaining the elementary sound source in air-conditioner, described control method also comprises:
Detect the analog of described elementary sound source; And
Described analog is converted to described digital reference signal.
6. control method according to claim 1, is characterized in that, the digital reference signal obtaining the elementary sound source in air-conditioner comprises:
Obtain the digital tach signal of the blower fan of described air-conditioner; And/or
Obtain the digital acceleration signal of the compressor of described air-conditioner; And/or
Obtain digital tach signal or the acceleration signal of the indoor set of described air-conditioner.
7. for a control device for air-conditioner noise reduction, it is characterized in that, comprising:
First acquiring unit, for obtaining the digital reference signal of the elementary sound source in air-conditioner;
Generation unit, for generating control command according to described digital reference signal, wherein, described control command produces output signal, the noise that described output signal sends for suppressing described elementary sound source for the secondary sound source controlled in described air-conditioner; And
Control unit, produces described output signal for controlling described secondary sound source by described control command.
8. control device according to claim 7, is characterized in that, also comprises:
Second acquisition unit, for after being controlled described secondary sound source by described control command and producing described output signal, obtains error signal; And
Amending unit, for outputing signal according to described error signal correction, obtains revised output signal.
9. control device according to claim 8, is characterized in that, described second acquisition unit comprises:
First acquisition module, for obtaining the current output signal of described secondary sound source;
Second acquisition module, for obtaining the transfer function of described current output signal and described error signal;
First computing module, for calculating according to described current output signal and described transfer function, the acoustical signal of the sound field of described secondary sound source; And
Determination module, for using described acoustical signal as described error signal,
Or,
3rd acquisition module, for obtaining the desired signal of error pick-up self;
Detection module, is delivered to the output signal of described error pick-up for detecting described secondary sound source; And
Second computing module, for calculating according to described desired signal and the described output signal being delivered to described error pick-up, obtains described error signal.
10. control device according to claim 8, is characterized in that, also comprises:
3rd acquiring unit, for while the described error signal of acquisition, obtain the filtering signal of described digital reference signal, wherein, described filtering signal is the convolution signal of described digital reference signal and transfer function;
4th acquiring unit, for obtaining first weighing vector of described digital reference signal in the first moment; And
Determining unit, for determining the second weighing vector according to described error signal, described filtering signal and described first weighing vector, described second weighing vector is the weighing vector of described digital reference signal in the second moment, and described second moment is the moment after described first moment
Wherein, described amending unit also for outputing signal according to described second weighing vector correction, obtains revised output signal, and described control unit also produces revised output signal for controlling secondary sound source by control command.
11. control device according to claim 7, is characterized in that, also comprise:
Detecting unit, for before the digital reference signal obtaining the elementary sound source in air-conditioner, detects the analog of described elementary sound source; And
Converting unit, for being converted to described digital reference signal by described analog.
12. control device according to claim 7, is characterized in that, described first acquiring unit comprises:
4th acquisition module, for obtaining the digital tach signal of the blower fan of described air-conditioner; And/or
5th acquisition module, for obtaining the digital acceleration signal of the compressor of described air-conditioner; And/or
6th acquisition module, for obtaining digital tach signal or the acceleration signal of the indoor set of described air-conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410329030.7A CN105318490A (en) | 2014-07-10 | 2014-07-10 | Control method and device for noise reduction of air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410329030.7A CN105318490A (en) | 2014-07-10 | 2014-07-10 | Control method and device for noise reduction of air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105318490A true CN105318490A (en) | 2016-02-10 |
Family
ID=55246437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410329030.7A Pending CN105318490A (en) | 2014-07-10 | 2014-07-10 | Control method and device for noise reduction of air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105318490A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556190A (en) * | 2016-11-30 | 2017-04-05 | 深圳汇通智能化科技有限公司 | Cooling-water machine management control system based on cloud computing |
| CN106766086A (en) * | 2016-08-20 | 2017-05-31 | 中声科技（北京）有限公司 | The air-conditioning that a kind of active abates the noise |
| CN107676919A (en) * | 2017-07-31 | 2018-02-09 | 青岛海尔空调电子有限公司 | A kind of air-conditioner set method for noise reduction control |
| CN108877829A (en) * | 2018-04-03 | 2018-11-23 | 中国航天科工集团第四研究院指挥自动化技术研发与应用中心 | A kind of method and apparatus of signal processing |
| CN109282479A (en) * | 2018-09-17 | 2019-01-29 | 青岛海信日立空调***有限公司 | Air conditioner noise reduction device and noise-reduction method |
| 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 |
| CN111161701A (en) * | 2019-12-27 | 2020-05-15 | 汉得利（常州）电子股份有限公司 | Active noise control system of air conditioner fan |
| CN111536681A (en) * | 2020-04-24 | 2020-08-14 | 青岛海信日立空调***有限公司 | Air conditioner and active noise reduction debugging method |
| CN112128918A (en) * | 2020-08-11 | 2020-12-25 | 清华大学苏州汽车研究院（相城） | Active noise control system for noise reduction of air conditioner fan and air conditioner |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0616314A2 (en) * | 1993-03-17 | 1994-09-21 | Kabushiki Kaisha Toshiba | Active noise attenuating device of the adaptive control type |
| CN101819766A (en) * | 2010-01-15 | 2010-09-01 | 浙江万里学院 | Multi-channel active noise control method for abating noises |
| CN201698745U (en) * | 2010-07-01 | 2011-01-05 | 中国矿业大学(北京) | Mining multi-wave self-adaptive active noise control device |
| CN102216980A (en) * | 2011-05-09 | 2011-10-12 | 华为技术有限公司 | Wheelwork noise control method and controller |
| CN102314868A (en) * | 2010-06-30 | 2012-01-11 | 中兴通讯股份有限公司 | Fan noise inhibition method and device |
| CN103527445A (en) * | 2013-08-30 | 2014-01-22 | 青岛海信日立空调***有限公司 | Air conditioner and noise elimination method thereof |
| CN103791568A (en) * | 2014-02-28 | 2014-05-14 | 苏州大学 | Active control device for noise of air condition compressor |
-
2014
- 2014-07-10 CN CN201410329030.7A patent/CN105318490A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0616314A2 (en) * | 1993-03-17 | 1994-09-21 | Kabushiki Kaisha Toshiba | Active noise attenuating device of the adaptive control type |
| CN101819766A (en) * | 2010-01-15 | 2010-09-01 | 浙江万里学院 | Multi-channel active noise control method for abating noises |
| CN102314868A (en) * | 2010-06-30 | 2012-01-11 | 中兴通讯股份有限公司 | Fan noise inhibition method and device |
| CN201698745U (en) * | 2010-07-01 | 2011-01-05 | 中国矿业大学(北京) | Mining multi-wave self-adaptive active noise control device |
| CN102216980A (en) * | 2011-05-09 | 2011-10-12 | 华为技术有限公司 | Wheelwork noise control method and controller |
| CN103527445A (en) * | 2013-08-30 | 2014-01-22 | 青岛海信日立空调***有限公司 | Air conditioner and noise elimination method thereof |
| CN103791568A (en) * | 2014-02-28 | 2014-05-14 | 苏州大学 | Active control device for noise of air condition compressor |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766086A (en) * | 2016-08-20 | 2017-05-31 | 中声科技（北京）有限公司 | The air-conditioning that a kind of active abates the noise |
| CN106556190A (en) * | 2016-11-30 | 2017-04-05 | 深圳汇通智能化科技有限公司 | Cooling-water machine management control system based on cloud computing |
| CN107676919A (en) * | 2017-07-31 | 2018-02-09 | 青岛海尔空调电子有限公司 | A kind of air-conditioner set method for noise reduction control |
| CN107676919B (en) * | 2017-07-31 | 2021-07-27 | 青岛海尔空调电子有限公司 | Noise reduction control method for air conditioning unit |
| CN108877829A (en) * | 2018-04-03 | 2018-11-23 | 中国航天科工集团第四研究院指挥自动化技术研发与应用中心 | A kind of method and apparatus of signal processing |
| CN108877829B (en) * | 2018-04-03 | 2020-08-04 | 中国航天科工集团第四研究院指挥自动化技术研发与应用中心 | Signal processing method and device |
| CN109282479B (en) * | 2018-09-17 | 2021-02-23 | 青岛海信日立空调***有限公司 | Air conditioner noise reduction device and noise reduction method |
| CN109282479A (en) * | 2018-09-17 | 2019-01-29 | 青岛海信日立空调***有限公司 | Air conditioner noise reduction device and noise-reduction method |
| 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 |
| CN111161701A (en) * | 2019-12-27 | 2020-05-15 | 汉得利（常州）电子股份有限公司 | Active noise control system of air conditioner fan |
| CN111536681A (en) * | 2020-04-24 | 2020-08-14 | 青岛海信日立空调***有限公司 | Air conditioner and active noise reduction debugging method |
| CN111536681B (en) * | 2020-04-24 | 2021-11-05 | 青岛海信日立空调***有限公司 | Air conditioner and active noise reduction debugging method |
| CN112128918A (en) * | 2020-08-11 | 2020-12-25 | 清华大学苏州汽车研究院（相城） | Active noise control system for noise reduction of air conditioner fan and air conditioner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105318490A (en) | Control method and device for noise reduction of air conditioner | |
| CN204006502U (en) | For the control device of air-conditioner noise reduction | |
| JP5640063B2 (en) | Adjustable active noise control | |
| CN106782490B (en) | Noise processing method and device | |
| CN106205585B (en) | Noise elimination method and device | |
| CN109658915B (en) | A kind of noise-reduction method of central air-conditioning, denoising device and central air-conditioning | |
| CN104279738A (en) | Method, device and system for reducing noise of air conditioning unit | |
| CN111681633A (en) | Noise control device, electrical equipment and noise control method thereof | |
| WO2019134115A1 (en) | Active noise reduction method and apparatus, and earphones | |
| CN105298933A (en) | Active noise control device for axial fan | |
| JP5991487B2 (en) | Active noise control device | |
| JP6409109B1 (en) | Fan noise control system | |
| KR20160089582A (en) | Noise control method | |
| CN204084797U (en) | The noise reduction system of air-conditioner set | |
| JPH10171469A (en) | Silencer for electrical equipment | |
| JPH0827634B2 (en) | Electronic silencing system | |
| JP3421146B2 (en) | Sound field control method and device | |
| KR101564646B1 (en) | Active noise controlling apparatus and method using 3d sound reproduction method | |
| US11127389B2 (en) | Noise control system | |
| JPH10171468A (en) | Silencer for electrical equipment | |
| JPH0336897A (en) | Electronic silencing system | |
| JPH06124092A (en) | Noise eliminating device for air conditioner | |
| JP3316259B2 (en) | Active silencer | |
| JPH10161665A (en) | Silencer of air conditioner | |
| JP6128547B2 (en) | Sound source separation method, apparatus and program |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160210 |
|
| RJ01 | Rejection of invention patent application after publication |