CN111210798A - Noise reduction assembly, washing machine, and determination method and determination device of noise reduction algorithm - Google Patents
Noise reduction assembly, washing machine, and determination method and determination device of noise reduction algorithm Download PDFInfo
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- CN111210798A CN111210798A CN202010014987.8A CN202010014987A CN111210798A CN 111210798 A CN111210798 A CN 111210798A CN 202010014987 A CN202010014987 A CN 202010014987A CN 111210798 A CN111210798 A CN 111210798A
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17813—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms
Abstract
The application provides a noise reduction assembly, a washing machine, a method and a device for determining a noise reduction algorithm, a storage medium and a processor. This noise reduction assembly includes: the acquisition equipment is used for acquiring noise signals in a preset space; the noise reduction unit is communicated with the acquisition equipment and used for calculating according to the noise signal to obtain an anti-phase noise reduction signal; the sound production equipment is located collection equipment's one side and with fall the unit communication of making an uproar, sound production equipment is used for falling the noise wave according to the opposite phase place of sending out of the anti-phase place of signal of making an uproar, and wherein, collection equipment has two and is located sound production equipment's both sides respectively, and two collection equipment are first collection equipment and second collection equipment respectively, and wherein, the second collection equipment is located sound production side of sound production equipment. The noise reduction assembly has a good noise reduction effect. When the noise reduction assembly is applied to a washing machine, the noise reduction assembly can eliminate most of drying noise.
Description
Technical Field
The application relates to the field of noise reduction of washing machines, in particular to a noise reduction assembly, a washing machine, a determination method and a determination device of a noise reduction algorithm, a storage medium and a processor.
Background
With the development of economy and the improvement of the requirements of people on the quality of life, noise pollution is more and more difficult to tolerate. However, many devices generate noise, particularly household appliances, which operate in a human home environment, and the noise of the household appliances becomes a main noise source in the home environment.
The noise reduction of the household appliance and the noise reduction of other equipment have no essential difference on the noise reduction technology, the common noise reduction means is divided into passive noise reduction and active noise reduction, the passive noise reduction technology mainly utilizes the sound insulation and the sound absorption performance of materials to reduce noise, the noise is more effective for medium and high frequency noise, but the low frequency noise attenuation is slow, the penetrating power is strong, the diffraction is easy, and the effect of reducing the low frequency noise by using the passive means is difficult to achieve. Active noise reduction, also known as active noise control, is to generate noise reduction sound waves with opposite phases to external noise through an active noise reduction system, so as to neutralize the energy of the noise and realize the effect of reducing the noise, and for low-frequency noise, active noise reduction calculation is easier to control, and compared with a passive noise reduction technology, active noise reduction is more effective in reducing the low-frequency noise.
The basic principle of active noise reduction is simple, but the sound sources of actual products are various, the external sound field of the products is complex, the noise reduction effect is achieved at each position of the sound field, the difficulty is high, a plurality of loudspeakers are required to be used for carrying out multi-channel control on multi-order sound cavity modes, and the algorithm is complex. At present, a product carrying an active noise reduction module comprises an active noise reduction earphone and an active noise reduction automobile, wherein the active noise reduction earphone is used for reducing noise aiming at a point sound source, the complexity is greatly reduced compared with the noise reduction of a space sound field, and the active noise reduction automobile is used for reducing noise aiming at a local area around the ear of a driver or a passenger and belongs to the local control of the space sound field.
In the prior art, a specific scheme of actively reducing noise and applying the scheme to the washing machine is not found, most of the schemes are passive noise reduction modes, and the noise reduction effect on low-frequency noise is poor.
The above information disclosed in this background section is only for enhancement of understanding of the background of the technology described herein and, therefore, certain information may be included in the background that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
Disclosure of Invention
The application mainly aims to provide a noise reduction assembly, a washing machine, a noise reduction algorithm determination method, a determination device, a storage medium and a processor, so as to solve the problem that the noise reduction effect of the noise reduction assembly of the washing machine in the prior art is poor.
In order to achieve the above object, according to one aspect of the present application, there is provided a noise reduction assembly including: the acquisition equipment is used for acquiring noise signals in a preset space; the noise reduction unit is communicated with the acquisition equipment and used for calculating according to the noise signal to obtain an anti-phase noise reduction signal; sound production equipment is located one side of collection equipment and with the unit communication of making an uproar falls, sound production equipment is used for the basis anti-phase noise reduction signal sends anti-phase bit and falls the noise wave, wherein, collection equipment has two and is located respectively sound production equipment's both sides, two collection equipment is first collection equipment and second collection equipment respectively, wherein, second collection equipment is located sound production equipment's play sound side.
Further, the noise reduction unit includes: the first analog-to-digital conversion module is electrically connected with the acquisition equipment and is used for converting the noise signal into a digital signal; the controller is electrically connected with the first analog-to-digital conversion module and used for calculating an anti-phase noise reduction signal according to the digital signal; one end of the second analog-to-digital conversion module is electrically connected with the controller, the other end of the second analog-to-digital conversion module is electrically connected with the sound production equipment, and the second analog-to-digital conversion module is used for converting the anti-phase noise reduction signal into an analog signal; and the power supply module is electrically connected with the first analog-to-digital conversion module, the controller and the second analog-to-digital conversion module respectively.
Further, the noise reduction unit further includes: and one end of the amplifier is electrically connected with the second analog-to-digital conversion module, and the other end of the amplifier is electrically connected with the sound generating equipment.
Further, the controller includes a filtering module, where the filtering module is configured to filter out a digital signal corresponding to the inverted bit-reduced noise wave in the digital signal corresponding to the first acquisition device.
Further, the acquisition equipment is a sensor, and the controller comprises a DSP or an MCU.
Further, the washing machine further comprises any one of the noise reduction assemblies, wherein a collection device in the noise reduction assembly is located in the air duct, and a sound production device is located on the outer wall of the air duct.
Furthermore, the air duct comprises an air outlet duct and a return air duct, the noise reduction assembly corresponding to the air outlet duct is a first noise reduction assembly, the noise reduction assembly corresponding to the return air duct is a second noise reduction assembly, and the first noise reduction assembly and the second noise reduction assembly share one noise reduction unit.
According to another aspect of the present application, there is provided a method of determining a noise reduction algorithm applied to a noise reduction unit of a noise reduction device in a washing machine, the method comprising: controlling the first collecting device, the second collecting device and the sounding device to be arranged at initial positions according to the sound cavity structure of the air duct of the washing machine; performing coherence analysis on a first noise signal acquired by the first acquisition equipment and a second noise signal acquired by the second acquisition equipment to obtain an analysis result; controlling the first acquisition equipment, the second acquisition equipment and the sound production equipment to be arranged at corresponding final positions in an adjusting manner according to the analysis result; and determining the noise reduction algorithm according to the noise transfer relationship among the first acquisition equipment, the second acquisition equipment and the sound production equipment which are positioned at the corresponding final positions.
Further, arranging the first collecting device, the second collecting device and the sound generating device at initial positions according to a sound cavity structure of a wind channel of the washing machine, includes: determining the initial positions corresponding to the first acquisition equipment, the second acquisition equipment and the sound production equipment according to the sound cavity structure of the air duct of the washing machine; arranging the first acquisition device, the second acquisition device and the sound production device in the corresponding initial positions.
Further, according to the analysis result, the adjusting and arranging the first collecting device, the second collecting device and the sound generating device at the corresponding final positions comprises: determining final positions corresponding to the first acquisition equipment, the second acquisition equipment and the sound production equipment according to the analysis result; and adjusting the first acquisition equipment, the second acquisition equipment and the sound production equipment from the corresponding initial positions to the corresponding final positions.
Further, determining the noise reduction algorithm according to the noise transfer relationship among the first acquisition device, the second acquisition device and the sound generation device located at the corresponding final positions includes: calculating the noise transfer relationship between each point in the air duct; calculating a first transfer function, a second transfer function and a third transfer function according to the noise transfer relationship, wherein the first transfer function is a transfer function from the first acquisition equipment to the second acquisition equipment, the second transfer function is a transfer function from the sound production equipment to the second acquisition equipment, and the third transfer function is a transfer function from the sound production equipment to the first acquisition equipment; determining the noise reduction algorithm according to the first transfer function, the second transfer function, and the third transfer function.
According to another aspect of the present application, there is provided a determination device of a noise reduction algorithm applied to a noise reduction unit of a noise reduction device in a washing machine, the determination device including: the first control unit is used for controlling the first acquisition equipment, the second acquisition equipment and the sound production equipment to be arranged at initial positions according to the sound cavity structure of the air duct of the washing machine; the analysis unit is used for performing coherence analysis on the first noise signal acquired by the first acquisition equipment and the second noise signal acquired by the acquisition equipment to obtain an analysis result; the second control unit is used for controlling the first acquisition equipment, the second acquisition equipment and the sound production equipment to be arranged at corresponding final positions in an adjusting way according to the analysis result; and the determining unit is used for determining the noise reduction algorithm according to the noise transfer relationship among the first acquisition equipment, the second acquisition equipment and the sound generating equipment which are positioned at the corresponding final positions.
According to still another aspect of the present application, there is provided a storage medium including a stored program, wherein the program executes any one of the determination methods.
According to yet another aspect of the present application, there is provided a processor for executing a program, wherein the program executes to perform any one of the determination methods.
According to yet another aspect of the present application, there is provided a washing machine system comprising a washing machine and a determination device, wherein the washing machine is the washing machine, the determination device being used for any one of the determination methods.
According to the technical scheme, the noise reduction assembly comprises two acquisition devices, the two acquisition devices are respectively located on two sides of a sound production device, before the sound production device produces sound, the acquisition devices only acquire noise signals in a preset space and feed the noise signals back to a noise reduction unit, the noise reduction unit obtains an anti-phase noise reduction signal according to the noise signals, the sound production device emits anti-phase potential-reduction noise waves according to the anti-phase noise reduction signal, and the anti-phase noise reduction sound waves are mixed with the noise signals to enable at least part of noise in the preset space to be removed. After the sound generating device sends out the anti-phase bit-down noise waves, the two collecting devices can collect the self noise signals in the preset space and the mixed signals of the anti-phase bit-down noise waves and feed back the mixed signals to the noise reduction unit, the noise reduction unit generates anti-phase noise reduction signals again according to the mixed signals, and the signals can further eliminate the noise in the preset space. Therefore, the noise reduction assembly has a good noise reduction effect. When the noise reduction assembly is applied to a washing machine, the noise reduction assembly can eliminate most of drying noise.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 illustrates a schematic structural view of an embodiment of a noise reduction assembly according to the present application;
fig. 2 shows a schematic view of a partial structure of a washing machine according to the present application;
FIG. 3 shows a schematic flow diagram of an embodiment of a method of determining a noise reduction algorithm according to the present application; and
fig. 4 shows a schematic structural diagram of an embodiment of the determining means of the noise reduction algorithm according to the present application.
Wherein the figures include the following reference numerals:
10. a first acquisition device; 20. a noise reduction unit; 30. a sound generating device; 40. a second acquisition device; 50. an air outlet duct; 60. a fan; 70. an air return duct; 21. a first analog-to-digital conversion module; 22. a controller; 23. and the second analog-to-digital conversion module.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As described in the background art, in the prior art, a specific scheme for applying active noise reduction to a washing machine is not found, most of the schemes are passive noise reduction modes, and the noise reduction effect on low-frequency noise is not good.
Fig. 1 is a schematic structural diagram of a noise reduction assembly in an embodiment of the present application, and as shown in fig. 1, the noise reduction assembly includes:
the acquisition equipment is used for acquiring noise signals in a preset space;
the noise reduction unit 20 is communicated with the acquisition equipment and used for calculating according to the noise signals to obtain anti-phase noise reduction signals;
and a sound generating device 30 located at one side of the sound collecting device and communicating with the noise reducing unit 20, wherein the sound generating device 30 is configured to generate an anti-phase noise reducing wave according to the anti-phase noise reducing signal, two of the sound collecting devices are located at two sides of the sound generating device 30, the two sound collecting devices are a first sound collecting device 10 and a second sound collecting device 40, respectively, and the second sound collecting device 40 is located at a sound emitting side of the sound generating device 30.
In the noise reduction assembly, the acquisition device is used for acquiring a noise signal in a predetermined space; the noise reduction unit is communicated with the acquisition equipment and is used for calculating according to the noise signal to obtain an anti-phase noise reduction signal; the sound production equipment is located one side of above-mentioned collection equipment and with above-mentioned unit communication of making an uproar that falls, above-mentioned sound production equipment is used for falling the noise wave according to above-mentioned anti phase place noise reduction signal transmission anti phase place, and wherein, above-mentioned collection equipment has two and is located the both sides of above-mentioned sound production equipment respectively, and two above-mentioned collection equipment are first collection equipment and second collection equipment respectively. The noise reduction assembly comprises two acquisition devices, wherein the two acquisition devices are respectively positioned on two sides of a sound production device, before the sound production device produces sound, the acquisition devices only acquire noise signals in a preset space and feed the noise signals back to a noise reduction unit, the noise reduction unit obtains an anti-phase noise reduction signal according to the noise signals, the sound production device sends out anti-phase level-down noise waves according to the anti-phase noise reduction signal, and the anti-phase noise reduction sound waves are mixed with the noise signals, so that at least part of noise in the preset space is removed. After the sound generating device sends out the anti-phase bit-down noise waves, the two collecting devices can collect the self noise signals in the preset space and the mixed signals of the anti-phase bit-down noise waves and feed back the mixed signals to the noise reduction unit, the noise reduction unit generates anti-phase noise reduction signals again according to the mixed signals, and the signals can further eliminate the noise in the preset space. Therefore, the noise reduction assembly has a good noise reduction effect. When the noise reduction assembly is applied to a washing machine, the noise reduction assembly can eliminate most of drying noise.
In the embodiment of the present application, as shown in fig. 1, the noise reduction unit 20 includes a first analog-to-digital conversion module 21, a controller 22, a second analog-to-digital conversion module 23, and a power supply module. The first analog-to-digital conversion module 21 is electrically connected with the acquisition equipment and is used for converting the noise signal into a digital signal; the controller 22 is electrically connected to the first analog-to-digital conversion module 21, and calculates an anti-phase noise reduction signal according to the digital signal; one end of the second analog-to-digital conversion module 23 is electrically connected to the controller 22, and the other end is electrically connected to the sound generating device 30, and is configured to convert the anti-phase noise reduction signal into an analog signal; the power module is electrically connected to the first analog-to-digital conversion module 21, the controller 22, and the second analog-to-digital conversion module 23, respectively. In this structure, the first analog-to-digital conversion module 21 converts the analog signal into a digital signal, which is beneficial for the controller 22 to calculate to obtain the reverse direction noise reduction signal, and then the second analog-to-digital conversion module 23 converts the analog signal into a digital signal, which is convenient for communication with the sound generating device 30.
In an embodiment of the present application, the noise reduction unit further includes an amplifier, one end of the amplifier is electrically connected to the second analog-to-digital conversion module, and the other end of the amplifier is electrically connected to the sound generating device.
In an embodiment of the application, the controller includes a filtering module, and the filtering module is configured to filter a digital signal corresponding to the anti-phase noise-reduced wave in the digital signal corresponding to the first acquisition device, that is, the controller obtains a corresponding anti-phase noise-reduced signal only according to the noise signal and the noise processing after noise reduction, so as to further ensure a better noise reduction effect.
In one embodiment of the application, the acquisition device is a sensor and the controller comprises a DSP or MCU. .
It should be noted that the collecting device is a sensor, and includes various types of sound sensors, such as BR-ZS1, BR-N201, etc.; the controller can adopt one of DSP and MCU alone, also can two kinds of controllers combine to use.
In another embodiment of the present application, a washing machine is provided. The local structure of the washing machine comprises a fan 60 and an air duct communicated with the fan 60, the washing machine further comprises any one of the noise reduction assemblies, the collection equipment in the noise reduction assemblies is located in the air duct, and the sound production equipment is located on the outer wall of the air duct.
The washing machine comprises a fan, an air duct communicated with the fan and any one of the noise reduction assemblies, wherein the collection equipment in the noise reduction assemblies is located in the air duct, and the sound production equipment is located on the outer wall of the air duct. The fan noise is the main noise source when the whole washing machine is used for drying, and the fan noise comprises the electromagnetic noise of the motor and the pneumatic noise generated by the rotation of the centrifugal fan, and is mainly the pneumatic noise of the centrifugal fan. The fan noise can propagate along the air duct, and in the scheme, the partial structure of the noise reduction assembly is arranged in the air duct, so that the drying noise can be obviously reduced.
In another embodiment of the present application, as shown in fig. 2, the air duct includes an air outlet duct 50 and a return air duct 70, the noise reduction component corresponding to the air outlet duct 50 is a first noise reduction component, the noise reduction component corresponding to the return air duct 70 is a second noise reduction component, and the first noise reduction component and the second noise reduction component share one noise reduction unit 20. Because the fan 60 noise propagates along the return air duct 70 and the outlet air duct 50 respectively, the first noise reduction assembly and the second noise reduction assembly are adopted to actively reduce noise of the propagated noise in the outlet air duct 50 and the return air duct 70 respectively, so that a better noise reduction effect can be achieved.
In another embodiment of the present application, a method for determining a noise reduction algorithm is further provided, and fig. 3 is a flowchart of the method, as shown in fig. 3, the method includes the following steps:
s101, controlling the first collecting device, the second collecting device and the sounding device to be arranged at initial positions according to the sound cavity structure of the air duct of the washing machine;
step S102, performing coherence analysis on the first noise signal acquired by the first acquisition device and the second noise signal acquired by the second acquisition device to obtain an analysis result;
step S103, controlling the first acquisition equipment, the second acquisition equipment and the sound production equipment to be adjusted and arranged at corresponding final positions according to the analysis result;
and step S104, determining the noise reduction algorithm according to the noise transfer relationship among the first acquisition equipment, the second acquisition equipment and the sound production equipment which are positioned at the corresponding final positions.
By adopting the method for determining the noise reduction algorithm provided by the embodiment, firstly, the first acquisition equipment, the second acquisition equipment and the sound production equipment are controlled to be arranged at initial positions according to the sound cavity structure of the air duct of the washing machine; secondly, performing coherence analysis on the first noise signal acquired by the first acquisition equipment and the second noise signal acquired by the second acquisition equipment to obtain an analysis result; then, according to the analysis result, controlling the first acquisition equipment, the second acquisition equipment and the sound production equipment to be arranged at corresponding final positions in an adjusting way; and finally, determining the noise reduction algorithm according to the noise transfer relationship among the first acquisition equipment, the second acquisition equipment and the sound production equipment which are positioned at the corresponding final positions. The determining method determines the noise reduction algorithm of the noise reduction unit in the noise reduction device aiming at the specific structure of the air duct, so that the obtained noise reduction algorithm can well eliminate the noise in the air duct, and the drying noise of the washing machine can be obviously reduced.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
In order to arrange the first collecting device, the second collecting device and the sound generating device at more accurate initial positions, in an embodiment of the present application, we need to arrange the first collecting device, the second collecting device and the sound generating device at initial positions according to a sound cavity structure of a wind channel of a washing machine, including: determining the initial positions corresponding to the first collecting device, the second collecting device and the sounding device according to the sound cavity structure of the air duct of the washing machine; and arranging the first collecting device, the second collecting device and the sound generating device at the corresponding initial positions.
In order to arrange the first collecting device, the second collecting device and the sound generating device at more accurate final positions, in an embodiment of the present application, the adjusting and arranging the first collecting device, the second collecting device and the sound generating device at corresponding final positions according to the analysis result includes: determining final positions corresponding to the first acquisition equipment, the second acquisition equipment and the sound production equipment according to the analysis result; and adjusting the first acquisition equipment, the second acquisition equipment and the sound production equipment from the corresponding initial positions to the corresponding final positions.
In this embodiment, a position where coherence of the first noise signal acquired by the first acquisition device and the second noise signal acquired by the second acquisition device is greater than or equal to a predetermined value is a final position; the predetermined value is a standard value set according to an actual application environment.
In an embodiment of the application, determining the noise reduction algorithm according to a noise transfer relationship between the first collecting device, the second collecting device and the sound generating device located at the corresponding final positions includes: calculating the noise transfer relationship between each point in the air duct; calculating a first transfer function, a second transfer function and a third transfer function according to the noise transfer relationship, wherein the first transfer function is a transfer function from the first collection device to the second collection device, the second transfer function is a transfer function from the sound production device to the second collection device, and the third transfer function is a transfer function from the sound production device to the first collection device; and determining the noise reduction algorithm according to the first transfer function, the second transfer function and the third transfer function. In this way, the noise reduction algorithm can be determined more accurately by the first transfer function, the second transfer function, and the third transfer function.
In an embodiment of the present application, there is further provided a device for determining a noise reduction algorithm, as shown in fig. 4, the structural diagram of the device includes:
a first control unit 100 for controlling the first collecting device, the second collecting device and the sound generating device to be arranged at initial positions according to a sound cavity structure of an air duct of the washing machine;
an analysis unit 200, configured to perform coherence analysis on the first noise signal acquired by the first acquisition device and the second noise signal acquired by the acquisition device to obtain an analysis result;
a second control unit 300, configured to control, according to the analysis result, the first collecting device, the second collecting device, and the sound generating device to be adjusted and arranged at corresponding final positions;
a determining unit 400, configured to determine the noise reduction algorithm according to the noise transfer relationship among the first collecting device, the second collecting device, and the sound generating device located at the corresponding final position.
By adopting the device for determining the noise algorithm provided by the embodiment, the first control unit is used for controlling the first acquisition equipment, the second acquisition equipment and the sound production equipment to be arranged at initial positions according to the sound cavity structure of the air duct of the washing machine; the analysis unit is used for performing coherence analysis on the first noise signal acquired by the first acquisition equipment and the second noise signal acquired by the acquisition equipment to obtain an analysis result; the second control unit is used for controlling the first acquisition equipment, the second acquisition equipment and the sound production equipment to be arranged at corresponding final positions in an adjusting way according to the analysis result; the determining unit is used for determining the noise reduction algorithm according to the noise transfer relationship among the first collecting device, the second collecting device and the sound generating device which are located at the corresponding final positions. The determining device determines the noise reduction algorithm of the noise reduction unit in the noise reduction device according to the specific structure of the air duct, so that the obtained noise reduction algorithm can well eliminate the noise in the air duct, and the drying noise of the washing machine can be obviously reduced.
In order to arrange the first collecting device, the second collecting device and the sound generating device at more accurate initial positions, in an embodiment of the present application, the first control unit includes a first determining module and a first control module, and the first determining module is configured to determine the initial positions corresponding to the first collecting device, the second collecting device and the sound generating device according to a sound cavity structure of a wind channel of the washing machine; the first control module is used for arranging the first acquisition equipment, the second acquisition equipment and the sound production equipment at the corresponding initial positions.
In order to arrange the first collecting device, the second collecting device and the sound generating device at more accurate final positions, in an embodiment of the present application, the second control unit includes a second determining module and a second control module, and the second determining module is configured to determine the final positions corresponding to the first collecting device, the second collecting device and the sound generating device according to the analysis result; the second control module is used for adjusting the first acquisition equipment, the second acquisition equipment and the sound production equipment from the corresponding initial positions to the corresponding final positions.
In this embodiment, a position where coherence of the first noise signal acquired by the first acquisition device and the second noise signal acquired by the second acquisition device is greater than or equal to a predetermined value is a final position; the predetermined value is a standard value set according to an actual application environment.
In an embodiment of the present application, the determining unit includes a first calculating module, a second calculating module, and a third determining module, where the first calculating module is configured to calculate a noise transfer relationship between points in the air duct; the second calculation module is configured to calculate a first transfer function, a second transfer function, and a third transfer function according to the noise transfer relationship, where the first transfer function is a transfer function from the first collection device to the second collection device, the second transfer function is a transfer function from the sound generation device to the second collection device, and the third transfer function is a transfer function from the sound generation device to the first collection device; the third determining module is configured to determine the noise reduction algorithm according to the first transfer function, the second transfer function, and the third transfer function. In this way, the noise reduction algorithm can be determined more accurately by the first transfer function, the second transfer function, and the third transfer function.
In another embodiment of the present application, there is provided a washing machine system including a washing machine as the above-described washing machine and a determination device for performing any one of the above-described determination methods.
The washing machine system comprises the washing machine, and the air duct of the washing machine is provided with a part of noise reduction assemblies, so that the drying noise of the washing machine is low. In addition, the washing machine system also comprises the determining device, the noise reduction algorithm determined by the determining device is an algorithm aiming at the air duct structure, and the algorithm is applied to the noise reduction assembly, so that the noise reduction assembly has a better noise reduction effect, the drying noise of the washing machine is eliminated better, and the washing machine system is further ensured to have smaller drying noise.
The device for determining the noise reduction algorithm comprises a processor and a memory, wherein the first control unit, the analysis unit, the second control unit, the determination unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The kernel can be set to be one or more than one, and the noise reduction algorithm of the noise reduction unit in the noise reduction device is determined according to the specific structure of the air duct by adjusting the kernel parameters, so that the obtained noise reduction algorithm can well eliminate the noise in the air duct, and the drying noise of the washing machine can be obviously reduced.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
An embodiment of the present invention provides a storage medium, on which a program is stored, and the program, when executed by a processor, implements the above-described method for determining a noise reduction algorithm.
The embodiment of the invention provides a processor, which is used for running a program, wherein the method for determining the noise reduction algorithm is executed when the program runs.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein when the processor executes the program, at least the following steps are realized:
s101, controlling the first collecting device, the second collecting device and the sounding device to be arranged at initial positions according to the sound cavity structure of the air duct of the washing machine;
step S102, performing coherence analysis on the first noise signal acquired by the first acquisition device and the second noise signal acquired by the second acquisition device to obtain an analysis result;
step S103, controlling the first acquisition equipment, the second acquisition equipment and the sound production equipment to be adjusted and arranged at corresponding final positions according to the analysis result;
and step S104, determining the noise reduction algorithm according to the noise transfer relationship among the first acquisition equipment, the second acquisition equipment and the sound production equipment which are positioned at the corresponding final positions.
The device herein may be a server, a PC, a PAD, a mobile phone, etc.
The present application further provides a computer program product adapted to perform a program of initializing at least the following method steps when executed on a data processing device:
s101, controlling the first collecting device, the second collecting device and the sounding device to be arranged at initial positions according to the sound cavity structure of the air duct of the washing machine;
step S102, performing coherence analysis on the first noise signal acquired by the first acquisition device and the second noise signal acquired by the second acquisition device to obtain an analysis result;
step S103, controlling the first acquisition equipment, the second acquisition equipment and the sound production equipment to be adjusted and arranged at corresponding final positions according to the analysis result;
and step S104, determining the noise reduction algorithm according to the noise transfer relationship among the first acquisition equipment, the second acquisition equipment and the sound production equipment which are positioned at the corresponding final positions.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
1) the noise reduction assembly comprises two acquisition devices, wherein the two acquisition devices are respectively positioned on two sides of a sound production device, before the sound production device produces sound, the acquisition devices only collect noise signals in a preset space and feed the noise signals back to a noise reduction unit, the noise reduction unit obtains a reverse phase noise reduction signal according to the noise signals, the sound production device sends out reverse phase noise reduction waves according to the reverse phase noise reduction signals, and the reverse phase noise reduction waves are mixed with the noise signals, so that at least part of noise in the preset space is removed. After the sound generating device sends out the anti-phase bit-down noise waves, the two collecting devices can collect the self noise signals in the preset space and the mixed signals of the anti-phase bit-down noise waves and feed back the mixed signals to the noise reduction unit, the noise reduction unit generates anti-phase noise reduction signals again according to the mixed signals, and the signals can further eliminate the noise in the preset space. Therefore, the noise reduction assembly has a good noise reduction effect. When the noise reduction assembly is applied to a washing machine, the noise reduction assembly can eliminate most of drying noise.
2) Among the washing machine of this application, including the fan and with the wind channel of above-mentioned fan intercommunication, still include the subassembly of making an uproar of falling of any kind, wherein, the collection equipment among the above-mentioned subassembly of making an uproar of falling is located above-mentioned wind channel, and above-mentioned sound production equipment is located the outer wall in above-mentioned wind channel. The fan noise is the main noise source of the whole washing machine, and comprises the electromagnetic noise of a motor and the pneumatic noise generated by the rotation of a centrifugal fan, and the pneumatic noise of the centrifugal fan is mainly used. The fan noise can propagate along the air duct, and in the scheme, the partial structure of the noise reduction assembly is arranged in the air duct, so that the drying noise can be obviously reduced.
3) According to the method for determining the noise reduction algorithm, firstly, the first collecting device, the second collecting device and the sounding device are controlled to be arranged at initial positions according to the structure of a sound cavity of an air duct of the washing machine; secondly, performing coherence analysis on the first noise signal acquired by the first acquisition equipment and the second noise signal acquired by the second acquisition equipment to obtain an analysis result; then, according to the analysis result, controlling the first acquisition equipment, the second acquisition equipment and the sound production equipment to be arranged at corresponding final positions in an adjusting way; and finally, determining the noise reduction algorithm according to the noise transfer relationship among the first acquisition equipment, the second acquisition equipment and the sound production equipment which are positioned at the corresponding final positions. The determining method determines the noise reduction algorithm of the noise reduction unit in the noise reduction device aiming at the specific structure of the air duct, so that the obtained noise reduction algorithm can well eliminate the noise in the air duct, and the drying noise of the washing machine can be obviously reduced.
4) In the device for determining the noise algorithm, a first control unit is used for controlling the first collecting device, the second collecting device and the sounding device to be arranged at initial positions according to the sound cavity structure of the air duct of the washing machine; the analysis unit is used for performing coherence analysis on the first noise signal acquired by the first acquisition equipment and the second noise signal acquired by the acquisition equipment to obtain an analysis result; the second control unit is used for controlling the first acquisition equipment, the second acquisition equipment and the sound production equipment to be arranged at corresponding final positions in an adjusting way according to the analysis result; the determining unit is used for determining the noise reduction algorithm according to the noise transfer relationship among the first collecting device, the second collecting device and the sound generating device which are located at the corresponding final positions. The determining device determines the noise reduction algorithm of the noise reduction unit in the noise reduction device according to the specific structure of the air duct, so that the obtained noise reduction algorithm can well eliminate the noise in the air duct, and the drying noise of the washing machine can be obviously reduced.
5) In the washing machine system of this application, because including foretell washing machine, be provided with partial noise reduction assembly in this washing machine's the wind channel, consequently, this washing machine's drying noise is less. In addition, the washing machine system also comprises the determining device, the noise reduction algorithm determined by the determining device is an algorithm aiming at the air duct structure, and the algorithm is applied to the noise reduction assembly, so that the noise reduction assembly has a better noise reduction effect, the drying noise of the washing machine is eliminated better, and the washing machine system is further ensured to have smaller drying noise.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (15)
1. A noise reduction assembly, comprising:
the acquisition equipment is used for acquiring noise signals in a preset space;
the noise reduction unit is communicated with the acquisition equipment and used for calculating according to the noise signal to obtain an anti-phase noise reduction signal;
the sounding device is positioned at one side of the acquisition device and is communicated with the noise reduction unit, the sounding device is used for sending out anti-phase potential reduction noise waves according to the anti-phase noise reduction signals,
wherein, collection equipment has two and is located respectively sound production equipment's both sides, two collection equipment is first collection equipment and second collection equipment respectively, wherein, second collection equipment is located sound production side of sound production equipment.
2. The noise reduction assembly of claim 1, wherein the noise reduction unit comprises:
the first analog-to-digital conversion module is electrically connected with the acquisition equipment and is used for converting the noise signal into a digital signal;
the controller is electrically connected with the first analog-to-digital conversion module and used for calculating an anti-phase noise reduction signal according to the digital signal;
one end of the second analog-to-digital conversion module is electrically connected with the controller, the other end of the second analog-to-digital conversion module is electrically connected with the sound production equipment, and the second analog-to-digital conversion module is used for converting the anti-phase noise reduction signal into an analog signal;
and the power supply module is electrically connected with the first analog-to-digital conversion module, the controller and the second analog-to-digital conversion module respectively.
3. The noise reduction assembly of claim 2, wherein the noise reduction unit further comprises:
and one end of the amplifier is electrically connected with the second analog-to-digital conversion module, and the other end of the amplifier is electrically connected with the sound generating equipment.
4. The noise reduction assembly of claim 2, wherein the controller comprises a filtering module configured to filter out a digital signal corresponding to the inverted noise-reducing wave from the digital signal corresponding to the first acquisition device.
5. The noise reduction assembly of claim 2 or 3, wherein the acquisition device is a sensor and the controller comprises a DSP or MCU.
6. A washing machine comprising a fan and an air duct communicating with the fan, characterized in that the washing machine further comprises a noise reduction assembly according to any one of claims 1 to 5, wherein a collection device of the noise reduction assembly is located in the air duct, and a sound production device is located on an outer wall of the air duct.
7. The washing machine as claimed in claim 6, wherein the air duct includes an outlet air duct and a return air duct, the noise reduction component corresponding to the outlet air duct is a first noise reduction component, the noise reduction component corresponding to the return air duct is a second noise reduction component, and the first noise reduction component and the second noise reduction component share one noise reduction unit.
8. A method for determining a noise reduction algorithm applied to a noise reduction unit of a noise reduction device in a washing machine according to claim 6 or 7, the method comprising:
controlling the first collecting device, the second collecting device and the sounding device to be arranged at initial positions according to the sound cavity structure of the air duct of the washing machine;
performing coherence analysis on a first noise signal acquired by the first acquisition equipment and a second noise signal acquired by the second acquisition equipment to obtain an analysis result;
controlling the first acquisition equipment, the second acquisition equipment and the sound production equipment to be arranged at corresponding final positions in an adjusting manner according to the analysis result;
and determining the noise reduction algorithm according to the noise transfer relationship among the first acquisition equipment, the second acquisition equipment and the sound production equipment which are positioned at the corresponding final positions.
9. The method of claim 8, wherein the arranging the first collection device, the second collection device and the sound emitting device in an initial position according to a structure of a sound chamber of a duct of a washing machine comprises:
determining the initial positions corresponding to the first acquisition equipment, the second acquisition equipment and the sound production equipment according to the sound cavity structure of the air duct of the washing machine;
arranging the first acquisition device, the second acquisition device and the sound production device in the corresponding initial positions.
10. The determination method according to claim 8, wherein the adjusting the arrangement of the first capture device, the second capture device, and the sound generation device at the corresponding final positions according to the analysis result comprises:
determining final positions corresponding to the first acquisition equipment, the second acquisition equipment and the sound production equipment according to the analysis result;
and adjusting the first acquisition equipment, the second acquisition equipment and the sound production equipment from the corresponding initial positions to the corresponding final positions.
11. The determination method according to claim 8, wherein determining the noise reduction algorithm according to the noise transfer relationship of the first acquisition device, the second acquisition device and a sound generation device located at the corresponding final positions comprises:
calculating the noise transfer relationship between each point in the air duct;
calculating a first transfer function, a second transfer function and a third transfer function according to the noise transfer relationship, wherein the first transfer function is a transfer function from the first acquisition equipment to the second acquisition equipment, the second transfer function is a transfer function from the sound production equipment to the second acquisition equipment, and the third transfer function is a transfer function from the sound production equipment to the first acquisition equipment;
determining the noise reduction algorithm according to the first transfer function, the second transfer function, and the third transfer function.
12. A determination device of a noise reduction algorithm applied in a noise reduction unit of a noise reduction device in a washing machine as claimed in claim 6 or 7, the determination device comprising:
the first control unit is used for controlling the first acquisition equipment, the second acquisition equipment and the sound production equipment to be arranged at initial positions according to the sound cavity structure of the air duct of the washing machine;
the analysis unit is used for performing coherence analysis on the first noise signal acquired by the first acquisition equipment and the second noise signal acquired by the acquisition equipment to obtain an analysis result;
the second control unit is used for controlling the first acquisition equipment, the second acquisition equipment and the sound production equipment to be arranged at corresponding final positions in an adjusting way according to the analysis result;
and the determining unit is used for determining the noise reduction algorithm according to the noise transfer relationship among the first acquisition equipment, the second acquisition equipment and the sound generating equipment which are positioned at the corresponding final positions.
13. A storage medium characterized in that the storage medium includes a stored program, wherein the program executes the determination method of any one of claims 8 to 11.
14. A processor, characterized in that the processor is configured to run a program, wherein the program when running performs the determination method of any one of claims 8 to 11.
15. A washing machine system comprising a washing machine according to claim 6 or 7 and a determination device for performing the determination method according to any one of claims 8 to 11.
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