CN108534196A - The cooking apparatus and its interlock method of noise reduction system and vision detection system linkage - Google Patents
The cooking apparatus and its interlock method of noise reduction system and vision detection system linkage Download PDFInfo
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- CN108534196A CN108534196A CN201810191912.XA CN201810191912A CN108534196A CN 108534196 A CN108534196 A CN 108534196A CN 201810191912 A CN201810191912 A CN 201810191912A CN 108534196 A CN108534196 A CN 108534196A
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- noise reduction
- sound field
- smoke machine
- detection system
- vision detection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
- F04D29/665—Sound attenuation by means of resonance chambers or interference
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The cooking apparatus and its interlock method of noise reduction system and vision detection system linkage, cooking apparatus includes smoke machine, Enclosed Sound Field noise reduction system and vision detection system, the Enclosed Sound Field noise reduction system is used to generate the sound wave for the noise for offsetting smoke machine, and the smoke machine and the vision detection system and the Enclosed Sound Field noise reduction system are electrically connected by smoke machine main board power supply and mutually；The smoke machine links with the vision detection system and the Enclosed Sound Field noise reduction system.The present invention propose a kind of Enclosed Sound Field noise reduction system, vision detection system linkage cooking apparatus, instant/timely noise reduction is realized by the setting of linkage, realize really intelligent and low noise smoke exhaust ventilator, in addition the interlock method using above-mentioned cooking apparatus is also proposed, keep cooking apparatus more intelligent, can get each mutually matched optimal solution of function.
Description
Technical field
The present invention relates to the kitchens of cooking apparatus technical field more particularly to a kind of noise reduction system and vision detection system linkage
Room equipment and its interlock method.
Background technology
Currently, traditional suction and pumping kitchen ventilator mainly realizes that this method passes through artificial to the control of wind speed by physical button
Fume exhauster velocity modulation section is realized in manipulation.There are many disadvantages in practical operation for such method：1. level of smoke differentiation is indefinite,
Manual operation can mostly adjust it is high-power prevent big smog from occurring, so cause electric power resource significant wastage；2. people is to adjust to pump
Smoke machine wind speed has delay, influences operating experience.
Existing automatic speed regulation smoke exhaust ventilator realizes the much progress in smoke exhaust ventilator performance, is based on non-vision smog more and examines
Device is surveyed, can determine whether mist detecting device smokescope nearby, but this method can not carry out smog identification to entire hearth, it can not
Determine smog range, and insensitive to steam, so cause to use maximum power, production to very little range but highly concentrated smog
Raw false-alarm, situations such as reporting by mistake, misrepresenting deliberately, and the additional function of current smoke exhaust ventilator do not have a linkage, such as decrease of noise functions, and one
As have 5 seconds or more and delay, greatly influence the experience of user.
Invention content
It is an object of the invention to propose a kind of kitchen of Enclosed Sound Field noise reduction system and vision detection system linkage
Equipment realizes instant/timely noise reduction by the setting of linkage, realizes really intelligent and low noise smoke exhaust ventilator.
Another object of the present invention is to propose the interlock method using above-mentioned cooking apparatus, make cooking apparatus more intelligence
Energyization can get each mutually matched optimal solution of function.
For this purpose, the present invention uses following technical scheme：
A kind of Enclosed Sound Field noise reduction system, vision detection system linkage cooking apparatus, including smoke machine further includes three
Dimension space sound field noise reduction system and vision detection system, the Enclosed Sound Field noise reduction system, which is used to generate, offsets making an uproar for smoke machine
The sound wave of sound, the vision detection system are used to acquire the image below smoke machine and handle the smog area obtained below current smoke machine
Domain and level of smoke, and communicate information to fan assembly and carry out fan speed regulation；
The smoke machine and the vision detection system and the Enclosed Sound Field noise reduction system pass through smoke machine main board power supply
And it mutually electrically connects；The smoke machine links with the vision detection system and the Enclosed Sound Field noise reduction system.
Further instruction book, the smoke machine are provided with air inlet and air duct, and the Enclosed Sound Field noise reduction system is outstanding
Sky is set to the enclosure space of the inside of the smoke machine, and the enclosure space is totally-enclosed or has less than 2 structural planes completely spacious
The space opened, and the Enclosed Sound Field noise reduction system is between the air inlet and the air duct.
Further instruction book further includes kitchen range, the vision detection system and the Enclosed Sound Field noise reduction system
It links with the kitchen range.
Further instruction book, the vision detection system include infrared light compensating lamp, image collecting device, processor and after
Electric appliance；
Described image harvester is used to acquire the visual information of smoke machine lower zone, is in infrared light compensating lamp light filling
The video flowing of hearth target area is acquired, and information is transmitted to the processor；
The controller is used for：Edge detection is carried out to the image of image acquisition device and obtains the hearth in image
Target area carries out processing to the hearth target area in described image or is carried out to the video flowing of the hearth target area
Processing, obtains smog information；
The relay is used to control the break-make of infrared light compensating lamp, and infrared light compensating lamp is made to carry out the stage to acquisition image-region
Property light filling；
Described image harvester is connected with the relay, the on-off signal for obtaining infrared light compensating lamp.
Further instruction book, the Enclosed Sound Field noise reduction system include Enclosed Sound Field denoising device and adaptive
Three dimensions noise reduction control unit, the Enclosed Sound Field denoising device is answered vacantly to be set to the closing of the inside of the smoke machine
Space, and the Enclosed Sound Field denoising device, between the air inlet and the air duct, the self-adaptation three-dimensional is empty
Between noise reduction control unit be electrically connected to the Enclosed Sound Field denoising device.
Further instruction book, the Enclosed Sound Field denoising device include noise transducer, loud speaker, error sensing
Device and acoustics resonant tank；
The loud speaker, signal and generation for receiving adaptive three dimensions noise reduction control unit are in noise source
The reversed sound wave of 180 degree；
The error pick-up, the performance for detecting self-adaptation three-dimensional spatial noise reduction control unit correct adaptive three
The algorithm of dimension space noise reduction control unit carries out signal feedback to self-adaptation three-dimensional spatial noise reduction control unit；
The self-adaptation three-dimensional spatial noise reduction control unit is used to receive the wave of the noise source of the noise transducer transmission
Frequency and the signal for receiving the error pick-up carry out operation and carry out signal output to the loud speaker；
Loud speaker setting K, and K >=2, the loud speaker are located at the smoke machine by the acoustic resonance case respectively
Fan assembly wind box bottom centre, and the loud speaker is installed on the kuppe of the smoke machine main body of the smoke machine
It is interior, the cone or diaphragm of the loud speaker and its parallel, the loud speaker of wherein one side of outermost and the acoustic resonance case
Cone or diaphragm towards the air inlet, and or angle β parallel with the air inlet be less than 60 °；
Noise transducer setting P, and P >=4, and the quantity of the noise transducer is more than the number of the loud speaker
Amount, i.e. P >=K, the noise transducer are located on the loud speaker；
The error pick-up is located at the lower section of the loud speaker.
Further instruction book, when smoke machine or the startup of power supply or kitchen range, vision detection system is dropped with Enclosed Sound Field
System of making an uproar while starting, vision detection system adjusts the rotating speed of smoke machine or the flow-disturbing of flexible smoke machine according to the concentration of oil smoke
Plate/cowling panel, while Enclosed Sound Field noise reduction system generates the corresponding sound wave for offsetting noise.
Further instruction book, when smoke machine or the startup of power supply or kitchen range, vision detection system and Enclosed Sound Field drop
System of making an uproar while starting, vision detection system adjusts the rotating speed of smoke machine or the flow-disturbing of flexible smoke machine according to the concentration of oil smoke
Plate/cowling panel, when wind speed is more than minimum shelves, Enclosed Sound Field noise reduction system starts, and generates corresponding counteracting noise
Sound wave.
Further instruction book, when smoke machine or the startup of power supply or kitchen range, vision detection system starts simultaneously, three dimensions
Sound field noise reduction system starts in -5 seconds 0.5 second；Vision detection system according to the concentration of oil smoke, adjust smoke machine rotating speed or
Spoiler/cowling panel of flexible smoke machine, Enclosed Sound Field noise reduction system generate the corresponding sound wave for offsetting noise.
Further instruction book, when smoke machine or the startup of power supply or kitchen range, vision detection system starts simultaneously, vision-based detection
System adjusts the rotating speed of smoke machine or spoiler/cowling panel of flexible smoke machine according to the concentration of oil smoke, when wind speed is in minimum shelves
When above, Enclosed Sound Field noise reduction system starts, and generates the corresponding sound wave for offsetting noise.
Beneficial effects of the present invention are：It is arranged by linking, vision detection system can be adjusted according to the concentration of oil smoke
To improve suction, three dimensions noise reduction system can be operated according to smoke machine for the revolution of the wind turbine of smoke machine or flexible spoiler/cowling panel
Situation corresponds to adjustment noise reduction strategies (start or do not start, or generate different sound waves to noise reduction), real by way of linkage
Now instant/timely noise reduction realizes really intelligent and low noise smoke exhaust ventilator.
Description of the drawings
Fig. 1 is the perspective structure schematic diagram of one embodiment of the smoke machine of the present invention；
Fig. 2 is the knot of the part fan component and Enclosed Sound Field denoising device of one embodiment of the smoke machine of the present invention
Structure schematic diagram；
Fig. 3 is that the signal of one embodiment of the signal processing method of the present invention flows to schematic diagram；
Fig. 4 is the structural schematic diagram of the duct wall in the air duct of the smoke machine of the present invention；
Fig. 5 be the present invention loud speaker is parallel with air inlet or the schematic diagram of angle β；
Fig. 6 is that the vision detection system of one embodiment of the invention is handled to obtain to the hearth target area in image
The step S305 image identification design sketch of the flow chart of smoke region and level of smoke.
Wherein, shell 1, smoke machine main body 2, fan assembly 3, baffle assembly 4, Enclosed Sound Field denoising device 5, three-dimensional
Space sound field noise reduction control unit 6, vision detection system 7, duct wall 20, air inlet 21, air duct 22, reinforcing rib 201, convex closure
202, wind box 31, spiral case 32, impeller 33, noise transducer 51, loud speaker 52, error pick-up 53, acoustic resonance case 54, lead
Stream cover 55, kitchen range 01.
Specific implementation mode
Below in conjunction with the accompanying drawings and the technical solution that further illustrates the present invention of specific implementation mode.
A kind of Enclosed Sound Field noise reduction system, vision detection system linkage cooking apparatus, including smoke machine further includes three
Dimension space sound field noise reduction system and vision detection system, the Enclosed Sound Field noise reduction system, which is used to generate, offsets making an uproar for smoke machine
The sound wave of sound, the vision detection system are used to acquire the image below smoke machine and handle the smog area obtained below current smoke machine
Domain and level of smoke, and communicate information to fan assembly and carry out fan speed regulation；
The smoke machine and the vision detection system and the Enclosed Sound Field noise reduction system pass through smoke machine main board power supply
And it mutually electrically connects；The smoke machine links with the vision detection system and the Enclosed Sound Field noise reduction system.
The present invention propose it is a kind of having both the cooking apparatus of Enclosed Sound Field noise reduction system and vision detection system, wherein regarding
Feel that detecting system is used to acquire the image below smoke machine and handles smoke region and the level of smoke obtained below current cigarette smoke machine,
And communicate information to fan assembly and carry out fan speed regulation, Enclosed Sound Field noise reduction system detects multiple channels and obtains in real time in real time
Data, and can be efficiently and accurately spatial noise and free space noise radiation are estimated, quickly can accurately simulate
Go out acoustic field signal, to eliminate the calculating of the noise in smoke machine, the acoustic field signal for offset noise frequency, sound field is calculated
Signal generates after being received by Enclosed Sound Field denoising device can eliminate the sound wave of noise source, and its two system with smoke machine into
Row linkage.
By link be arranged, vision detection system according to the concentration of oil smoke, can adjust the wind turbine of smoke machine revolution or
For flexible spoiler/cowling panel to improve suction, three dimensions noise reduction system can correspond to adjustment noise reduction plan according to smoke machine function situation
Slightly (start or do not start, or generate different sound waves to noise reduction), instant/timely noise reduction is realized by way of linkage, it is real
Now real intelligent and low noise smoke exhaust ventilator.
Further instruction, the smoke machine are provided with air inlet and air duct, and the Enclosed Sound Field noise reduction system is hanging
Be set to the enclosure space of the inside of the smoke machine, and the Enclosed Sound Field noise reduction system be located at the air inlet with it is described
Between air duct.
Enclosure space is totally-enclosed or has less than the 2 completely open spaces of structural plane, is not limited only to rectangle, Ke Yishi
The space of various different shapes.Reach the optimization but simultaneously of smoke machine performance by the setting of enclosure space and adaptation function
It is to complete work under the operating of low noise, noise and the conflicting technological difficulties of performance is solved, in the suction for not sacrificing smoke machine
Under the premise of the performance of oil smoke, the noise that smoke machine is sent out when operating is relatively low and does not cause user in physiology and psychological negative shadow
It rings.
Further instruction further includes kitchen range, the vision detection system and the Enclosed Sound Field noise reduction system with
The kitchen range linkage.Smoke machine, kitchen range and two systems link, and propose a kind of intelligent cooking apparatus.
Further instruction, the vision detection system include infrared light compensating lamp, image collecting device, processor and relay
Device；
Described image harvester is used to acquire the visual information of smoke machine lower zone, is in infrared light compensating lamp light filling
The video flowing of hearth target area is acquired, and information is transmitted to the processor；
The controller is used for：Edge detection is carried out to the image of image acquisition device and obtains the hearth in image
Target area carries out processing to the hearth target area in described image or is carried out to the video flowing of the hearth target area
Processing, obtains smog information；
The relay is used to control the break-make of infrared light compensating lamp, and infrared light compensating lamp is made to carry out the stage to acquisition image-region
Property light filling；
Described image harvester is connected with the relay, the on-off signal for obtaining infrared light compensating lamp.
Described image harvester includes camera and shell, and the camera is located in the shell, and the shell is provided with
The camera lens of through-hole for installing blur prevention glass, the camera is corresponding with the position of blur prevention glass.
Through blur prevention eyeglass, camera can obtain the clear image of hearth target area.Camera is fixed on controller,
Camera transmits a signal to the processor of control chip by pin.Control chip is STM32 chips.Control chip passes through serial ports
Output wind speed regulating command is to the velocity regulator of fan assembly, and then velocity regulator adjusts the wind speed of smoke exhaust ventilator
Section.
Preferably, infrared light compensating lamp has multiple, is divided into the periphery of camera so that infrared light filling is more uniform.Camera with
Relay is connected, the on-off signal for obtaining infrared light compensating lamp, and camera is the acquisition hearth mesh in infrared light compensating lamp light filling
The video flowing in region is marked, ensures that acquisition image is clear enough.
It should be noted that the existing vision detection system suitable for smoke machine may be used in above-mentioned vision detection system,
As long as smokescope or level of smoke can be identified.Preferably, after smoke machine is opened, camera is obtained through blur prevention eyeglass
Current smoke machine lower zone visual information is taken, and is transmitted to the processor of control chip, processor is determined current by detection algorithm
Two kinds of non smoke dynamic background models are established in the target area of image after obtaining multiple image.The first model is no light filling
Lamp background model, second is the modeling of multiframe minimum value dynamic background.Pass through current video stream and two kinds of non smoke dynamic backgrounds
Model progress frame is poor, determines the region of current smog and the concentration of smog.
Further instruction, the wind speed of vision detection system and smoke machine linkage are adjusted a wage scale method, are included the following steps：
S1, acquisition smoke exhaust ventilator lower images；
S2, edge detection is carried out to image, obtains the hearth target area in image；
S3, the hearth target area in image handle or handle the video flowing of hearth target area,
Obtain smog information；
S4, simultaneously output wind speed regulating command is generated to velocity regulator according to smoke region and level of smoke；
S5, velocity regulator adjust a wage scale to the wind speed of smoke exhaust ventilator.
By being shot to hearth region, image or video flowing to shooting carry out processing and obtain smoke region and smog etc.
Grade, it is more accurate to the judgement of smokescope.The wind speed of smoke exhaust ventilator is adjusted according to smoke region and level of smoke so that oil pumping
The wind speed of smoke machine can accurately adapt to the smokescope on hearth.
In step S3, smog information is smoke region and level of smoke, and the processing procedure for obtaining smog information is：
Dynamic background modeling is done to the video flowing of hearth target area, obtains dynamic background；
It is poor by the video flowing of hearth target area and the frame of dynamic background, determine smoke region and level of smoke.
Preferably, when acquiring smoke exhaust ventilator lower images, the stage is carried out to acquisition image-region using infrared light compensating lamp
Property light filling；The video flowing of hearth target area is acquired when being infrared light compensating lamp light filling.Infrared light compensating lamp can allow smog
Feature is more obvious, is more readily detected in vision.
In its step S3, smog information is smoke region and level of smoke, at the hearth target area in image
It includes step S301-S305 that reason, which obtains the process of smog information,.
Hearth target area in S301, image generates gray level image.
S302, continuous multiple frames gray level image is smoothed using gaussian filtering, gray level image is weighted flat
, in gray level image each pixel value, all by the value of other pixels in the value and neighborhood of the pixel by plus
It is obtained after weight average.
S303, the gray value of each pixel of arbitrary continuation multiframe gray level image is compared, takes continuous multiple frames
The pixel with minimum gradation value is assigned to a new picture in each gray level image, will be in each gray level image of continuous multiple frames
The gray value of one with pixel maximum gradation value and pixel in new picture asks poor, obtains pixel gray level absolute difference
Value generates gray-scale map.
S304, in gray-scale map, absolute difference is divided by low middle high three shade of gray according to the flue gas threshold value of setting, is obtained
Obtain smoke region and level of smoke.The concentration scale in region and smog where the smog information i.e. smog obtained.
In gray-scale map, low middle high three shade of gray can also be come out with three kinds of single channel colour codes, realize cigarette
Gas concentration identifies, and oil smoke region and concentration are observed convenient for user.
S305, in real time acquisition arbitrary continuation multiple image, analyzing processing obtain smoke region and level of smoke, obtain real-time
Smog dynamic.The wind speed of smoking smoke machine is controlled according to the real-time dynamic of smog so that the wind speed and smog of smoke exhaust ventilator
Concentration is to matching.
Gradient division is carried out according to preset flue gas threshold value to the gray-scale map of generation, and then obtains smoke region and smog etc.
Grade, this acquisition smoke region and level of smoke accuracy higher.
Continuous multiple frames gray level image is smoothed using gaussian filtering is：Template is generated using gaussian filtering, is swept
Each pixel of tracing as in, then determine the weighted average gray value of pixel in neighborhood, it is replaced using weighted average gray value
The pixel value of central point.The method of this gaussian filtering can effectively eliminate the gaussian noise of image, reject noise, improve picture
The accuracy of processing.Gaussian filtering is exactly that average process is weighted to entire image.
Preferably, ten frame image of arbitrary continuation is subjected to flue gas concentration mark.It is dense to choose continuous ten frames image progress flue gas
Scale is known, and ensure that the accuracy of processing.
Preferably, in step S304, according to the flue gas threshold value of setting absolute difference is divided into gray-scale map low middle high by three
The method of a shade of gray is：
Pixel gray level absolute difference is subjected to binaryzation；
By after pixel gray level absolute difference binaryzation in gray-scale map value meet 0-6.0/255 threshold transition be
First shade of gray region, that is, low oil smoke concentration region；
Value after pixel gray level absolute difference binaryzation in gray-scale map is met to 6.0/255-12.0/255 threshold value
Be converted to the i.e. medium oil smoke concentration region in the second shade of gray region；
Value after pixel gray level absolute difference binaryzation in gray-scale map is met to 12.0/255-20.0/255 threshold
Value is converted to the i.e. high oil smoke concentration region in third shade of gray region.
It is respectively 0-6.0/255,6.0/255-12.0/255,12.0/255-20.0/255 to set flue gas threshold value, into
And gray-scale map is divided into low middle high three shade of gray, realize that the division of smoke-gas area and concentration, accuracy are high, with obvious effects.
The design sketch of smoke region and level of smoke division is completed as shown in fig. 6, Fig. 6 a are left hearth, Fig. 6 b are right stove
Platform.As shown in fig. 6, it is low oil smoke concentration region that a-quadrant, which is the first shade of gray region,；B area is the second shade of gray region
For medium oil smoke concentration region；The regions C are that the first shade of gray region is high oil smoke concentration region.
The vision detection system of the application carries out smoke region and smog by the image or video flowing for acquiring hearth region
Concentration judges, quantifies level of smoke and variation tendency, and then controlled wind speed, realizes intelligent control smoke exhaust ventilator operating power, reach
To the purpose in purification kitchen and reduction manual operation；It is real from the power consumption for reducing smoke exhaust ventilator by the automatic adjustment of wind speed
Energy saving purpose is showed.
Further instruction, the Enclosed Sound Field noise reduction system include Enclosed Sound Field denoising device and adaptive
Three dimensions noise reduction control unit, the closing that the Enclosed Sound Field denoising device is vacantly set to the inside of the smoke machine are empty
Between, and the Enclosed Sound Field denoising device is between the air inlet and the air duct, the self-adaptation three-dimensional space
Noise reduction control unit is electrically connected to the Enclosed Sound Field denoising device.
Enclosed Sound Field denoising device detects multiple channels and obtains real time data in real time, makes self-adaptation three-dimensional spatial noise reduction
Control unit, can be quickly accurate based on can be efficiently and accurately estimating spatial noise and free space noise radiation
Acoustic field signal is simulated, to eliminate the calculating of the noise in smoke machine, the acoustic field signal for offset noise frequency is calculated,
Acoustic field signal generates the sound wave that can eliminate noise source after being received by Enclosed Sound Field denoising device.
It should be noted that the self-adaptation three-dimensional spatial noise reduction control unit is using filtering X least mean square algorithms.Specifically
, the signal processing method of self-adaptation three-dimensional spatial noise reduction control unit, as Fig. 3 signals flow to shown in schematic diagram, including it is following
Step：
Step 1, three dimensions noise reduction control unit obtain by Enclosed Sound Field denoising device noise transducer and
Error returns the noise transducer signal R in the smoke machine inner sealing space that sensor noise is collected1(n)……RK(n) and error
The error sensor signals ε of sensor collection1(n)……εK(n), wherein K is loud speaker in Enclosed Sound Field denoising device
Quantity；
Step 2, each noise transducer signal of the filters filter through self-adaptation three-dimensional spatial noise reduction control unit
R1(n)……RK(n) and error sensor signals ε1(n)……εK(n) bandpass filter D is penetrated1……DLSignal decomposition at L
A subband signal；
Step 3, L subband signal is via the adaptive weighting coefficient for calculating each subband for filtering X lowest mean squares；
Step 4, each subband signal carries out quick Fu Li row transitions into frequency band；
Step 5, multiple frequency bands can be overlapped to form final unique signal frequency；
Step 6, signal frequency is carried out inverse quick Fu Li row conversion and solves broadband filter coefficient, conversion generate K with
Noise source is in the reversed equal strength acoustic signals S (n) of 180 degree；
Step 7, by equal strength acoustic signals S1(n)……SK(n) correspondence sends corresponding loud speaker to, for offsetting three
Different noises in dimension space.
The adaptive algorithm of the present invention is using filtering X least mean square algorithms, and the benefit of filtering X least fibre methods is to be not required to
Inverse matrix is solved, best convergence solution can be had by being also not required to other precognition parameters, relative to the least mean square algorithm of standard, certainly
The feature that the algorithm of adaptation three dimensions noise reduction control unit is main is handled using the signal (resolving into L subband) of multi-subband
Method simultaneously combines filtering X least mean square algorithms, and a large amount of the problem of calculating can be needed with effective solution, are strengthened in three dimensions
The effect of noise reduction.Meanwhile the effect of reduction be it is directly proportional with the quantity of the subband of design, the stability of total system it is more preferable and
Convergence also faster, while also strengthening influence of each transmission channels to algorithm.Another advantage of algorithm of this control unit is can
To remove the doubt of the delay of signal, reinforce whole noise reduction, is achieved in that in each subband through filtering X most
Adaptive Weight algorithm is added in small equal method, and final weight coefficient is then adjusted via filter.
The application step 2 signal decomposition at each subband signal after, for accelerating the convergence on algorithm, because believing on subband
Number frequency spectrum dynamic domain substantially subtracts relative to original signal, meanwhile, the slip of calculation amount be it is directly proportional to number of sub-bands, therefore,
The application will be used further to after signal decomposition in filtering X least mean square algorithms, original with directly being handled in traditional active denoising method
Signal is compared, and the actual effect that active noise reduction is applied in three dimensions can be improved in the present invention.
The best weight vector iteration of X least fibre methods is filtered in step 3 to be expressed as：
Wherein, μ is convergence factor,It is iteration update gradient direction.Each subband D1....LDo not stop through ε (n) and R (n)
Feedback iteration filter weights vector obtains the adaptive weighting coefficient of each subband up to obtaining optimum right vector value.
In closing three dimensions, such as length is the space of LxWxH, and N rank acoustic mode state functions can be expressed as
Wherein, N1、N2And N3It is the glottis neoplasms serial number along rectangular co-ordinate X, Y, Z.In actual application, such as smoke machine wind
The three dimensions noise reduction system in road, the noise frequency domain distribution of smoke machine are broadband noise and some wind from 20Hz to 20000Hz
The caused noise of line spectrum noise and vibration that machine generates.The noise power of smoke machine is effectively reduced, is absorbed in have and eliminates low order sound
Mode, it is such as typical<500Hz or<1000Hz active noise reduction techniques can no longer meet the noise reduction strategies on current smoke machine, especially
It is as smoke machine air duct is in closing or semi-enclosed Enclosed Sound Field.Meanwhile it the amplitude for noise source mode of seeking knowledge and required raising
It is the core technology that will actively make an uproar that the mode shape coefficients of sound device sounding, which are used to carry out three dimensions noise reduction, however the two unknown numbers are but
With the sound source characteristic close relation of space peripheral structure, geometry and noise.So quickly having by equivalent source method
Effect establishes noise hologram information, that is, penetrates the principle of interference recording noise source amplitude and phase of sound wave.Based on can effectively and essence
True estimates spatial noise and free space noise radiation, quickly can accurately simulate acoustic field signal, to disappear
The calculating of noise in soot blower.The method, which can be adapted to, solves high-order glottis neoplasms, can improve the frequency domain of noise reduction to 2000Hz,
It solves the problems, such as that some frequency ranges are not accomplish in existing active noise reduction techniques, breaches active noise reduction and can only drop within 1000Hz and make an uproar
The limitation of sound.
Further instruction, the Enclosed Sound Field denoising device include noise transducer, loud speaker, error pick-up
With acoustics resonant tank；
The loud speaker, signal and generation for receiving adaptive three dimensions noise reduction control unit are in noise source
The reversed sound wave of 180 degree；
The error pick-up, the performance for detecting self-adaptation three-dimensional spatial noise reduction control unit correct adaptive three
The algorithm of dimension space noise reduction control unit carries out signal feedback to self-adaptation three-dimensional spatial noise reduction control unit；
The self-adaptation three-dimensional spatial noise reduction control unit is used to receive the wave of the noise source of the noise transducer transmission
Frequency and the signal for receiving the error pick-up carry out operation and carry out signal output to the loud speaker；
Loud speaker setting K, and K >=2, the loud speaker are located at the smoke machine by the acoustic resonance case respectively
Fan assembly wind box bottom centre, and the loud speaker is installed on the kuppe of the smoke machine main body of the smoke machine
It is interior, the cone or diaphragm of the loud speaker and its parallel, the loud speaker of wherein one side of outermost and the acoustic resonance case
Cone or diaphragm towards the air inlet, and or angle parallel with the air inlet be less than 60 °；
Noise transducer setting P, and P >=4, and the quantity of the noise transducer is more than the number of the loud speaker
Amount, i.e. P >=K, the noise transducer are located on the loud speaker；
The error pick-up is located at the lower section of the loud speaker.
Self-adaptation three-dimensional spatial noise reduction control unit can be persistently iterated, and it is entire to allow to adjust the weight of adaptive-filtering
The state that system convergence tends towards stability.Such as：Noise signal is acquired at noise source, signal transmission gives self-adaptation three-dimensional sky
Between noise reduction control unit, then self-adaptation three-dimensional spatial noise reduction control unit into calculate output signal drive the speaker, with eliminate
Noise at D3.Error pick-up can monitor the sound pressure level at D3, be raised with automatic change to debug the weight of adaptive-filtering
The amplitude of sound device.
The outermost distance D2 of further description, the noise transducer and the loud speaker is no less than 50mm；
The outermost distance D3 of the error pick-up and the loud speaker is no less than 50mm.If sensor and loud speaker lean on very much
Closely, the acquisition of sound source can be influenced, therefore D2 and D3 are no less than 50mm, preferably 80-150mm.
Further instruction, as shown in figure 5, the acoustic resonance case face parallel with the loud speaker and the air inlet
The angle β that face is mutually parallel or is crossed to form with the extended surface in the air inlet face is less than 60 °.The present invention loud speaker towards into
Air port, noise source have been eliminated in incoming air inlet not yet, can effectively carry out noise reduction, dropped with general active
Its face is mutually parallel with bellows in technology of making an uproar, and solving the prior art effectively cannot reach the skill of noise reduction of three dimensions
Art problem.
The volume of further description, the acoustic resonance case is 441cm3-1764cm3.Preferably 600-900cm3。
Further description, the air duct volume between the Enclosed Sound Field denoising device and the air inlet are
2000cm3To 320000cm3.Space is bigger, and the difficulty of noise reduction is higher, Enclosed Sound Field denoising device and the air inlet it
Between air duct volume be 2000cm3To 320000cm3, for current noise reduction it is most effective be also that the noise reduction that can reach of current technology is empty
Between, it is preferred that the air duct volume between Enclosed Sound Field denoising device and the air inlet is 10500cm3To 31500cm3。
The air duct of further description, the smoke machine is the closed air duct of low resistance；The closed air duct of low resistance
Pipeline material be that metal or polymer material or/and the duct wall in the closed air duct of the low resistance are provided with integrated molding
Reinforcing rib/bumps packet or wherein one side inner wall be foam/pitch/rubber slab one or more modes combine.
The closed air duct of low resistance refers to the pipeline wall construction or material of low vibration, mainly wind path wall structure design or material
Material.The preferred low-resistance damping material of the present invention can be metal (stainless steel, aluminium alloy etc.), and thickness is 0.5mm-5mm (preferably 0.6-
1.5mm) or polymer material (such as PP, PC, plastics glass, rubber slab, foam), thickness be 0.5mm-5mm (preferably
0.8-1.2mm).Furthermore it is also possible to rigidly change the damping of material through structure design reinforced structure, vibration is reduced from structure
Amplitude, the inner wall if any integrally formed reinforcing rib/bumps packet or wherein one side is foam/pitch/rubber slab etc..
Preferably, as shown in figure 4, the air duct is the closed air duct of low resistance；The pipe in the closed air duct of low resistance
Road wall is provided with reinforcing rib 201 and male female packet 202, the reinforcing rib 201, the male female packet 202 with the duct wall 20
It is integrally formed；
The top of the outer wall for being opened in the duct wall of the reinforcing rib lateral circular, the male female packet are in dumbbell shape
It is vertical it is recessed/be convexly equipped in duct wall described in both sides outer wall middle part, and pipeline is partial in the installation position of the male female packet
The wall side of the mounting surface of wall.The reinforcing rib 201 can be shaped on duct wall 20 with tongue or form of grooves.
Further description, the loud speaker is at a distance from noise source less than the minimum wave length of sound or most of the noise source
The half of big wave length of sound.It can be the minimum wave length of sound of noise source or the half of maximum wave length of sound, specifically need to debug
See which noise frequency or frequency band reach maximum value to the reduction of whole noise power or sound quality.
Further instruction, when smoke machine or the startup of power supply or kitchen range, vision detection system and Enclosed Sound Field noise reduction
System starts simultaneously, vision detection system according to the concentration of oil smoke, adjust smoke machine rotating speed or flexible smoke machine spoiler/
Cowling panel, while Enclosed Sound Field noise reduction system generates the corresponding sound wave for offsetting noise.
Since the wind speed adjusting that certain customers are used to inhale different oil smoke concentrations to smoke machine does not know about or is unfamiliar with, set
When smoke machine starts, vision detection system starts simultaneously with Enclosed Sound Field noise reduction system, can avoid user and voluntarily opens cigarette
The gear number of machine is too small or excessive, in addition, Enclosed Sound Field noise reduction system can adjust noise reduction strategies with the gear number of practical smoke machine,
Different noise reduction sound waves is generated in real time.
Further instruction, when smoke machine or the startup of power supply or kitchen range, vision detection system and Enclosed Sound Field noise reduction
System starts simultaneously, vision detection system according to the concentration of oil smoke, adjust smoke machine rotating speed or flexible smoke machine spoiler/
Cowling panel, when wind speed is more than minimum shelves, Enclosed Sound Field noise reduction system starts, and generates the corresponding sound for offsetting noise
Wave.
Further instruction, when smoke machine or the startup of power supply or kitchen range, vision detection system starts simultaneously, three dimensions sound
Field noise reduction system starts in -5 seconds 0.5 second；Vision detection system adjusts the rotating speed of smoke machine or stretches according to the concentration of oil smoke
Spoiler/cowling panel of contracting smoke machine, Enclosed Sound Field noise reduction system generate the corresponding sound wave for offsetting noise.Improve whole system
In addition the stability of system can first detect whether kitchen range are used by vision detection system, when avoiding external noise excessive,
Enclosed Sound Field noise reduction system initiates otiose response, and unnecessary energy consumption is avoided to waste.
Further instruction, when smoke machine or the startup of power supply or kitchen range, vision detection system starts simultaneously, vision-based detection system
System adjusts the rotating speed of smoke machine or spoiler/cowling panel of flexible smoke machine according to the concentration of oil smoke, when wind speed minimum shelves with
When upper, Enclosed Sound Field noise reduction system starts, and generates the corresponding sound wave for offsetting noise.
Specification is needed, linkage setting of the invention is suitable on the smoke machine of different structure, such as T-type smoke machine, tower
Smoke machine, side-suction smoke machine, island smoke machine or Chinese style kitchen ventilator etc..
Embodiment
As Figure 1-Figure 4, a kind of apsacline smoke machine with Enclosed Sound Field denoising device, is installed on kitchen range 01
Top, the obliquity smoke machine include shell 1, smoke machine main body 2, fan assembly 3, baffle assembly 4, Enclosed Sound Field noise reduction
Device 5, self-adaptation three-dimensional spatial noise reduction control unit and vision detection system 7；
The shell 1 is provide with the outside for being placed in the smoke machine main body 2 as device；The smoke machine main body 2 is provided with air inlet
Mouth 21 and air duct 22, the air duct 22 are the closed air duct of low resistance；The duct wall 20 in the closed air duct of low resistance is arranged
There are reinforcing rib 201 and convex closure 202, the reinforcing rib 201, the convex closure 202 to be integrally formed with the duct wall 20；
Vision detection system 7 is mounted on baffle assembly 4, and the camera lens of image collecting device is towards kitchen range；
The top of the outer wall for being opened in the duct wall of 201 lateral circular of the reinforcing rib, the convex closure 202 are in dumbbell
The middle part of the vertical outer wall for being convexly equipped in duct wall described in both sides of type, and duct wall is partial in the installation position of the convex closure 202
Mounting surface wall side；The fan assembly 3 is located in the air duct 22, and 4 telescopic lid of the baffle assembly closes installation
In the opening of the smoke machine main body 2 towards cooking stove；Wind between the Enclosed Sound Field denoising device 5 and the air inlet 21
Road volume is 10500cm3。
The fan assembly 3 includes wind box 31, spiral case 32, motor and impeller 33, and the motor drives the impeller 33
Rotation, the impeller 33 are installed on the inside of the spiral case 32, the spiral case 32 are covered in outside the wind box 31.
The Enclosed Sound Field denoising device 5 is vacantly set to the enclosure space of the inside of the smoke machine, and described three
Dimension space sound field denoising device 5 is between the air inlet 21 and the air duct 22, the self-adaptation three-dimensional spatial noise reduction control
Unit processed is electrically connected to the Enclosed Sound Field denoising device 5.
The Enclosed Sound Field denoising device 5 includes 4 error sensings of loud speaker 52,2 of noise transducer 51,2
Device 53 and 2 acoustic resonance casees 54；The loud speaker 52 is installed on the fan assembly 3 by the acoustic resonance case 54 respectively
Wind box 31 lower section centre, the cone or diaphragm and its outermost of the loud speaker 52 and the acoustic resonance case 54
Wherein one side is parallel, and the cone or diaphragm of the loud speaker 52 are towards the air inlet；The acoustic resonance case 54 is raised with described
The parallel face of sound device 52 is mutually parallel with the air inlet face；The noise transducer 51 is located on the loud speaker 52
Kuppe 55 side wall, the error pick-up 53 is installed on the back side of baffle assembly 4, the body of the acoustic resonance case 54
Product is 600cm3；Outermost D of the noise transducer 51 apart from the loud speaker 523For 80mm.
The technical principle of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explain the present invention's
Principle, and it cannot be construed to limiting the scope of the invention in any way.Based on the explanation herein, the technology of this field
Personnel would not require any inventive effort the other specific implementation modes that can associate the present invention, these modes are fallen within
Within protection scope of the present invention.
Claims (10)
1. the cooking apparatus of a kind of Enclosed Sound Field noise reduction system, vision detection system linkage, including smoke machine, feature exist
In：
Further include Enclosed Sound Field noise reduction system and vision detection system, the Enclosed Sound Field noise reduction system is for generating
The sound wave of the noise of smoke machine is offset, the vision detection system obtains current smoke machine for acquiring the image below smoke machine and handling
The smoke region of lower section and level of smoke, and communicate information to fan assembly and carry out fan speed regulation；
The smoke machine and the vision detection system and the Enclosed Sound Field noise reduction system pass through smoke machine main board power supply and phase
Mutually electrically connect；The smoke machine links with the vision detection system and the Enclosed Sound Field noise reduction system.
2. the cooking apparatus of Enclosed Sound Field noise reduction system according to claim 1, vision detection system linkage, special
Sign is：The smoke machine is provided with air inlet and air duct, and the Enclosed Sound Field noise reduction system is vacantly set to the smoke machine
Inside enclosure space, the enclosure space is totally-enclosed or has less than the 2 completely open spaces of structural plane, and described three
Dimension space sound field noise reduction system is between the air inlet and the air duct.
3. the cooking apparatus of Enclosed Sound Field noise reduction system according to claim 1, vision detection system linkage, special
Sign is：Further include kitchen range, the vision detection system and the Enclosed Sound Field noise reduction system link with the kitchen range.
4. the cooking apparatus of Enclosed Sound Field noise reduction system according to claim 1 or 3, vision detection system linkage,
It is characterized in that：The vision detection system includes infrared light compensating lamp, image collecting device, processor and relay；
Described image harvester is used to acquire the visual information of smoke machine lower zone, is acquired in infrared light compensating lamp light filling
The video flowing of hearth target area, and information is transmitted to the processor；
The controller is used for：Edge detection is carried out to the image of image acquisition device and obtains the hearth target in image
Region, to the hearth target area in described image carry out processing or to the video flowing of the hearth target area at
Reason, obtains smog information；
The relay is used to control the break-make of infrared light compensating lamp, and infrared light compensating lamp is made to carry out interim benefit to acquisition image-region
Light；
Described image harvester is connected with the relay, the on-off signal for obtaining infrared light compensating lamp.
5. the cooking apparatus of Enclosed Sound Field noise reduction system according to claim 1 or 3, vision detection system linkage,
It is characterized in that：The Enclosed Sound Field noise reduction system includes Enclosed Sound Field denoising device and self-adaptation three-dimensional space drop
It makes an uproar control unit, the Enclosed Sound Field denoising device is vacantly set to the enclosure space of the inside of the smoke machine, and described
For Enclosed Sound Field denoising device between the air inlet and the air duct, the self-adaptation three-dimensional spatial noise reduction control is single
Member is electrically connected to the Enclosed Sound Field denoising device.
6. the cooking apparatus of Enclosed Sound Field noise reduction system according to claim 5, vision detection system linkage, special
Sign is：The Enclosed Sound Field denoising device includes noise transducer, loud speaker, error pick-up and acoustics resonant tank；
The loud speaker, signal and generation and noise source for receiving adaptive three dimensions noise reduction control unit are in 180 degree
Reversed sound wave；
It is empty to correct self-adaptation three-dimensional for the error pick-up, the performance for detecting self-adaptation three-dimensional spatial noise reduction control unit
Between noise reduction control unit algorithm to self-adaptation three-dimensional spatial noise reduction control unit carry out signal feedback；
The self-adaptation three-dimensional spatial noise reduction control unit be used to receive the noise source of noise transducer transmission wave frequency and
The signal of the error pick-up is received, operation is carried out and signal output is carried out to the loud speaker；
Loud speaker setting K, and K >=2, the loud speaker are located at the wind of the smoke machine by the acoustic resonance case respectively
The centre of the bottom of the wind box of thermomechanical components, and the loud speaker is installed in the kuppe of smoke machine main body of the smoke machine, institute
State the cone of loud speaker or parallel, the cone of the loud speaker of wherein one side of diaphragm and its outermost and the acoustic resonance case
Or diaphragm is towards the air inlet, and or angle β parallel with the air inlet is less than 60 °；
Noise transducer setting P, and P >=4, and the quantity of the noise transducer is more than the quantity of the loud speaker,
That is P >=K, the noise transducer are located on the loud speaker；
The error pick-up is located at the lower section of the loud speaker.
7. the cooking apparatus of Enclosed Sound Field noise reduction system according to claim 1 or 3, vision detection system linkage
Interlock method, it is characterised in that：
When smoke machine or power supply or kitchen range start, vision detection system starts simultaneously with Enclosed Sound Field noise reduction system, vision
Detecting system adjusts the rotating speed of smoke machine or spoiler/cowling panel of flexible smoke machine, while three-dimensional space according to the concentration of oil smoke
Between sound field noise reduction system generate the corresponding sound wave for offsetting noise.
8. the cooking apparatus of Enclosed Sound Field noise reduction system according to claim 1 or 3, vision detection system linkage
Interlock method, it is characterised in that：
When smoke machine or power supply or kitchen range start, vision detection system and Enclosed Sound Field noise reduction system start simultaneously, vision
Detecting system adjusts the rotating speed of smoke machine or spoiler/cowling panel of flexible smoke machine, when wind speed is most according to the concentration of oil smoke
When more than small shelves, Enclosed Sound Field noise reduction system starts, and generates the corresponding sound wave for offsetting noise.
9. the cooking apparatus of Enclosed Sound Field noise reduction system according to claim 1 or 3, vision detection system linkage
Interlock method, it is characterised in that：
When smoke machine or power supply or kitchen range start, vision detection system starts simultaneously, and Enclosed Sound Field noise reduction system is 0.5
Start in -5 seconds seconds；Vision detection system according to the concentration of oil smoke, adjust smoke machine rotating speed or flexible smoke machine spoiler/
Cowling panel, Enclosed Sound Field noise reduction system generate the corresponding sound wave for offsetting noise.
10. the cooking apparatus of Enclosed Sound Field noise reduction system according to claim 1 or 3, vision detection system linkage
Interlock method, it is characterised in that：
When smoke machine or power supply or kitchen range start, vision detection system starts simultaneously, and vision detection system is according to the concentration of oil smoke
Size adjusts the rotating speed of smoke machine or spoiler/cowling panel of flexible smoke machine, when wind speed is more than minimum shelves, three dimensions sound
Field noise reduction system starts, and generates the corresponding sound wave for offsetting noise.
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| CN201810191912.XA CN108534196B (en) | 2018-03-08 | 2018-03-08 | The cooking apparatus and its interlock method of noise reduction system and vision detection system linkage |
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