CN110345529A - Choke-proof wind-force regulation platform - Google Patents

Choke-proof wind-force regulation platform Download PDF

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Publication number
CN110345529A
CN110345529A CN201910460146.7A CN201910460146A CN110345529A CN 110345529 A CN110345529 A CN 110345529A CN 201910460146 A CN201910460146 A CN 201910460146A CN 110345529 A CN110345529 A CN 110345529A
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China
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image
equipment
filter
smog
connect
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CN201910460146.7A
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CN110345529B (en
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宋贤
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Pingyi Modern Chinese Medicine Industrial Park Co ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24CDOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00Details
    • F24C15/20Removing cooking fumes
    • F24C15/2021Arrangement or mounting of control or safety systems
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00Image enhancement or restoration
    • G06T5/70Denoising; Smoothing
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00Image enhancement or restoration
    • G06T5/73Deblurring; Sharpening
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00Image enhancement or restoration
    • G06T5/90Dynamic range modification of images or parts thereof

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Image Processing (AREA)

Abstract

The present invention relates to a kind of choke-proof wind-force regulation platforms, it include: density identification apparatus, for brightness value in double-smoothing image to be preset the pixel in smog brightness range as smog pixel, the smog distribution density directly proportional to the quantity is determined based on the quantity of smog pixel in the double-smoothing image;The top of barbecue table is arranged in wind control equipment, connect with the density identification apparatus, for determining that corresponding wind intensity dispels movement to the smog above barbecue table to execute based on the smog distribution density received;The smog distribution density received is higher, and corresponding wind intensity is higher.Choke-proof wind-force regulation platform of the invention is reliable for operation, convenient and practical.Movement adaptively is dispelled to live smog due to executing based on the live smoke density of barbecue detected, personnel are interfered to avoid roasting live smog.

Description

Choke-proof wind-force regulation platform
Technical field
The present invention relates to self adaptive control field more particularly to a kind of choke-proof wind-force regulation platforms.
Background technique
Self adaptive control is with conventional feedback control as optimum control and a kind of controlling party based on mathematical model Method, it is fewer about model and the priori knowledge of disturbance based on different only self adaptive controls, it needs in system It goes constantly to extract the information in relation to model in operational process, makes model gradual perfection.
Specifically, can constantly recognize model parameter according to the inputoutput data of object, this process be known as be System debates knowledge online.With the continuous progress of production process, by debating knowledge online, model can become more and more accurate, increasingly Close to reality.Since model is constantly improving, it is clear that also will therewith not based on the comprehensive control action come out of this model Disconnected improvement.Under this meaning, control system has certain adaptability.Such as when system is in the design phase, due to The initial information of plant characteristic compares shortage, system when just starting to put into operation may performance it is undesirable, as long as but by The operation of a period of time, after debating knowledge and control online, control system is gradually adapted to, itself will finally be adjusted to one completely The working condition of meaning.Certain control objects for another example, characteristic will may have greatly changed in the process of running, but pass through Knowledge is debated online and changes controller parameter, and system also can be adapted to gradually.
Summary of the invention
The present invention has inventive point important at following two:
(1) have in view of treated the image of the image sharpening based on Smart Sharpen filter than original image less Noise type quantity characteristic, introduce and targetedly sharpen selection mechanism again, for further decreasing picture noise;
(2) it is executed based on the live smoke density of barbecue detected and movement adaptively is dispelled to live smog, to avoid Live smog is roasted to interfere personnel.
According to an aspect of the present invention, a kind of choke-proof wind-force regulation platform is provided, the platform includes:
Density identification apparatus is connect with CPLD device, is used for brightness value in double-smoothing image in default smog brightness Pixel in range as smog pixel, based on smog pixel in the double-smoothing image quantity it is determining with it is described The directly proportional smog distribution density of quantity;
The top of barbecue table is arranged in wind control equipment, connect with the density identification apparatus, receives for being based on Smog distribution density determine corresponding wind intensity to execute and dispel movement to the smog above barbecue table;
In the wind control equipment, determine corresponding wind intensity to execute based on the smog distribution density received The movement that dispels to the smog above barbecue table includes: that the smog distribution density that receives is higher, and corresponding wind intensity is higher;
Capture mechanism is oriented, the top of barbecue table is set, is oriented image for the barbecue scene to barbecue table and catches Operation is obtained, captures image to obtain simultaneously output directional;
Smooth Spaces filter apparatus is connect with the orientation capture mechanism, for holding to the orientation capture image received Row smooth Spaces filtering processing, to obtain and export corresponding smooth Spaces filtering image;
Filter sharpens equipment, connect with the smooth Spaces filter apparatus, for the smooth Spaces filtering figure received As executing the image sharpening processing based on Smart Sharpen filter, to obtain filter sharpening image, and it is sharp to export the filter Change image;
Quantity identification apparatus, with the filter sharpen equipment connect, for receive the filter sharpening image and it is described put down Sliding space filtering image, each pixel value based on each pixel of smooth Spaces filtering image analyze the smooth Spaces The noise type quantity of filtering image, and the filter is analyzed based on each pixel value of each pixel of filter sharpening image The noise type quantity of mirror sharpening image;
Command analysis equipment is connect with the quantity identification apparatus, for the noise type in the filter sharpening image When quantity is less than or equal to preset ratio threshold value divided by the noise type quantity ratio obtained of the smooth Spaces filtering image, Issue the first control command;
The command analysis equipment is also used to the noise type quantity in the filter sharpening image divided by the smooth sky Between filtering image noise type quantity ratio obtained be greater than the preset ratio threshold value when, issue the second control command.
Choke-proof wind-force regulation platform of the invention is reliable for operation, convenient and practical.Due to based on the barbecue scene detected Smoke density, which is executed, adaptively dispels movement to live smog, interferes to avoid roasting live smog to personnel.
Detailed description of the invention
Embodiment of the present invention is described below with reference to attached drawing, in which:
Fig. 1 is the shape according to the applied barbecue table of the choke-proof wind-force regulation platform shown in embodiment of the present invention Structure chart.
Specific embodiment
The embodiment of choke-proof wind-force regulation platform of the invention is described in detail below with reference to accompanying drawings.
Smog (smog) is the compound word of two word of coal smoke (smoke) and mist (fog), by British Wo Yikesi (H.A.Voeux) use was created in 1905.
Smog original meaning is the mixture that the bituminous coal in air is combined with natural fog.This word meaning has exceeded original meaning model at present It encloses, the solid dust for referring to due to industrial discharge is nuclei of condensation spray generated (such as London smog), or by hydrocarbon The secondary pollution (such as Los Angeles photochemical fog) that compound and nitrogen oxides are generated through photochemical reaction is multiple pollutant Mixture formed smog.
Cigarette in chemistry refers generally to dust and mist refers generally to liquid.Phosphorus combustion product in chlorine has 2 kinds in chemistry: PCl3 and PCl5, respectively liquid and solid-state, thus visible white smog.But other reactions are generally cigarette or mist, such as: respectively Be moistened with the glass bar of concentrated ammonia liquor and concentrated hydrochloric acid close to when phenomenon be white cigarette;Concentrated hydrochloric acid reagent bottle is opened, bottleneck has white haze.
In order to overcome above-mentioned deficiency, the present invention has built a kind of choke-proof wind-force regulation platform, can effectively solve the problem that corresponding The technical issues of.
Fig. 1 is the shape according to the applied barbecue table of the choke-proof wind-force regulation platform shown in embodiment of the present invention Structure chart.
The choke-proof wind-force regulation platform shown according to an embodiment of the present invention includes:
Density identification apparatus is connect with CPLD device, is used for brightness value in double-smoothing image in default smog brightness Pixel in range as smog pixel, based on smog pixel in the double-smoothing image quantity it is determining with it is described The directly proportional smog distribution density of quantity;
The top of barbecue table is arranged in wind control equipment, connect with the density identification apparatus, receives for being based on Smog distribution density determine corresponding wind intensity to execute and dispel movement to the smog above barbecue table;
In the wind control equipment, determine corresponding wind intensity to execute based on the smog distribution density received The movement that dispels to the smog above barbecue table includes: that the smog distribution density that receives is higher, and corresponding wind intensity is higher;
Capture mechanism is oriented, the top of barbecue table is set, is oriented image for the barbecue scene to barbecue table and catches Operation is obtained, captures image to obtain simultaneously output directional;
Smooth Spaces filter apparatus is connect with the orientation capture mechanism, for holding to the orientation capture image received Row smooth Spaces filtering processing, to obtain and export corresponding smooth Spaces filtering image;
Filter sharpens equipment, connect with the smooth Spaces filter apparatus, for the smooth Spaces filtering figure received As executing the image sharpening processing based on Smart Sharpen filter, to obtain filter sharpening image, and it is sharp to export the filter Change image;
Quantity identification apparatus, with the filter sharpen equipment connect, for receive the filter sharpening image and it is described put down Sliding space filtering image, each pixel value based on each pixel of smooth Spaces filtering image analyze the smooth Spaces The noise type quantity of filtering image, and the filter is analyzed based on each pixel value of each pixel of filter sharpening image The noise type quantity of mirror sharpening image;
Command analysis equipment is connect with the quantity identification apparatus, for the noise type in the filter sharpening image When quantity is less than or equal to preset ratio threshold value divided by the noise type quantity ratio obtained of the smooth Spaces filtering image, Issue the first control command;
The command analysis equipment is also used to the noise type quantity in the filter sharpening image divided by the smooth sky Between filtering image noise type quantity ratio obtained be greater than the preset ratio threshold value when, issue the second control command;
CPLD device sharpens equipment with the command analysis equipment and the filter respectively and connect, for receiving When stating the second control command, controls the filter sharpening equipment and the filter sharpening image is executed again based on Smart The image sharpening of Sharpen filter is handled, to obtain corresponding double-smoothing image.
Then, continue that the specific structure of choke-proof wind-force regulation platform of the invention is further detailed.
In the choke-proof wind-force regulation platform:
The CPLD device is also used to when receiving first control command, using the filter sharpening image as double Weight filtering image output;
Wherein, the CPLD device is built-in with storage unit, and the built-in storage unit is for keeping in the dual filter Wave image.
In the choke-proof wind-force regulation platform:
Serial communication link and parallel communications chain are provided between the command analysis equipment and the quantity identification apparatus Road, the serial communication link is for transmitting control command between the command analysis equipment and the quantity identification apparatus;
Wherein, the parallel communication link between the command analysis equipment and the quantity identification apparatus for transmitting Image data.
Can also include: in the choke-proof wind-force regulation platform
Live timing device is connect with electrical energy consumption analysis equipment, for providing chronograph reference signal for electrical energy consumption analysis equipment;
Electrical energy consumption analysis equipment is connect with the electric power input terminal of orientation capture mechanism, and the orientation capture mechanism is for defeated The orientation captures image out, voltage that the electrical energy consumption analysis equipment is used to input per hour based on the electric power input terminal and The electric current inputted per hour executes the analysis of the electricity consumption grade to the orientation capture mechanism.
Can also include: in the choke-proof wind-force regulation platform
Component identifies equipment, for receiving the orientation capture image, obtains each picture in the orientation capture image Saturation degree component value, luma component values and the form and aspect component value of vegetarian refreshments;
Electric control appliance is connect with the electrical energy consumption analysis equipment, pre- for being optionally greater than in the electricity consumption grade received If when grade threshold, starting the powered operation to component identification equipment and the custom tailored equipment, otherwise, close to institute State the powered operation of component identification equipment and the custom tailored equipment.
Can also include: in the choke-proof wind-force regulation platform
Custom tailored equipment is connect with component identification equipment, for each pixel in orientation capture image The saturation degree pattern of each saturation degree component value composition of point executes dynamic range adjustment, right to obtain pattern after the first adjustment The black pattern of each luminance components value composition of each pixel executes dynamic range adjustment in the orientation capture image, with Pattern after acquisition second adjustment, the orientation capture the color-phase diagram of each form and aspect component value composition of each pixel in image Case.
Can also include: in the choke-proof wind-force regulation platform
Pattern processing equipment is connect with the custom tailored equipment, is used for pattern, described second after the first adjustment Pattern and the form and aspect pattern are overlapped processing after adjustment, are schemed with obtaining real-time adjustment corresponding with orientation capture image Picture;
Curvature adjusts equipment, connect with the pattern processing equipment, for receiving the real-time adjustment image, and to described Adjustment image executes curvature adjustment reducing each curvature of each curve in the real-time adjustment image default in real time Under curvature threshold, image is adjusted again to obtain.
Can also include: in the choke-proof wind-force regulation platform
Non-linear interpolation equipment connect with the smooth Spaces filter apparatus and curvature adjustment equipment respectively, is used for Non-linear interpolation processing is executed to the image of adjustment again received, to obtain corresponding non-linear interpolation image, and will be described Non-linear interpolation image replaces the orientation capture image and is sent to the smooth Spaces filter apparatus;
Wherein, the component identification equipment, the custom tailored equipment, the pattern processing equipment and curvature adjustment The SOC chip of different model is respectively adopted to realize in equipment.
In the choke-proof wind-force regulation platform:
In the electrical energy consumption analysis equipment, the voltage that is inputted per hour based on the electric power input terminal and input per hour Electric current to execute to the analysis of the electricity consumption grade of the orientation capture mechanism include: the voltage that will be inputted per hour and defeated per hour The electric current entered is multiplied to obtain power consumption per hour, determines corresponding orientation capture mechanism based on the power consumption per hour Electricity consumption grade;
Wherein, in the electrical energy consumption analysis equipment, the power consumption per hour is bigger, the corresponding orientation capture determined The electricity consumption higher grade of mechanism.
In addition, CPLD (Complex Programmable Logic Device) Complex Programmable Logic Devices, be from The device that PAL and GAL device development comes out, in contrast scale is big, and structure is complicated, belongs to large scale integrated circuit range.It is A kind of user according to respective the need and voluntarily digital integrated electronic circuit of constitutive logic function.Its basic design method is by integrated Develop software platform and with the methods of schematic diagram, hardware description language generate corresponding file destination, by download cable (" System " programming) code is transmitted in objective chip, realize the digital display circuit of design.CPLD is mainly by programmable logic macrocell Programmable interconnection matrix unit of the unit around center forms.Wherein MC structure is more complex, and has complicated I/O cell interconnection Structure can be generated as needed specific circuit structure by user, complete certain function.Due to being grown inside CPLD using fixed The metal wire of degree carries out the interconnection of each logical block, so the logic circuit of design has time predictability, avoids segmented The shortcomings that interconnection structure timing is not exclusively predicted.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is included at least one embodiment or example of the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include at least one this feature.
Although the present invention is disclosed as above with embodiment, it is not intended to limit the invention, any technical field Those of ordinary skill should can make change appropriate and same replacement without departing from the spirit and scope of the present invention. Therefore protection scope of the present invention should be subject to the range that the claim of this application defined.

Claims (9)

1. a kind of choke-proof wind-force regulation platform, the platform include:
Density identification apparatus is connect with CPLD device, is used for brightness value in double-smoothing image in default smog brightness range Interior pixel is as smog pixel, based on the quantity determination and the quantity of smog pixel in the double-smoothing image Directly proportional smog distribution density;
The top of barbecue table is arranged in wind control equipment, connect with the density identification apparatus, for based on the cigarette received Mist distribution density determines corresponding wind intensity to execute and dispel movement to the smog above barbecue table;
In the wind control equipment, determine corresponding wind intensity to execute to burning based on the smog distribution density received The movement that dispels of smog above roasting platform includes: that the smog distribution density that receives is higher, and corresponding wind intensity is higher;
Capture mechanism is oriented, the top of barbecue table is set, is oriented image capture behaviour for the barbecue scene to barbecue table Make, captures image to obtain simultaneously output directional;
Smooth Spaces filter apparatus is connect with the orientation capture mechanism, flat for executing to the orientation capture image received Sliding space filtering processing, to obtain and export corresponding smooth Spaces filtering image;
Filter sharpens equipment, connect with the smooth Spaces filter apparatus, for holding to the smooth Spaces filtering image received Image sharpening processing of the row based on Smart Sharpen filter, to obtain filter sharpening image, and exports the filter sharpening figure Picture;
Quantity identification apparatus sharpens equipment with the filter and connect, for receiving the filter sharpening image and the smooth sky Between filtering image, each pixel value based on each pixel of smooth Spaces filtering image analyzes the smooth Spaces filtering The noise type quantity of image, and it is sharp based on each pixel value of each pixel of filter sharpening image analysis filter Change the noise type quantity of image;
Command analysis equipment is connect with the quantity identification apparatus, for the noise type quantity in the filter sharpening image When being less than or equal to preset ratio threshold value divided by the noise type quantity ratio obtained of the smooth Spaces filtering image, issue First control command;
The command analysis equipment is also used to filter in the noise type quantity of the filter sharpening image divided by the smooth Spaces When the noise type quantity ratio obtained of wave image is greater than the preset ratio threshold value, the second control command is issued;
CPLD device sharpens equipment with the command analysis equipment and the filter respectively and connect, for receiving described the When two control commands, controls the filter sharpening equipment and the filter sharpening image is executed again based on Smart Sharpen The image sharpening of filter is handled, to obtain corresponding double-smoothing image.
2. choke-proof wind-force regulation platform as described in claim 1, it is characterised in that:
The CPLD device is also used to when receiving first control command, using the filter sharpening image as dual filter The output of wave image;
Wherein, the CPLD device is built-in with storage unit, and the built-in storage unit is for keeping in the double-smoothing figure Picture.
3. choke-proof wind-force regulation platform as claimed in claim 2, it is characterised in that:
It is provided with serial communication link and parallel communication link between the command analysis equipment and the quantity identification apparatus, institute Serial communication link is stated for transmitting control command between the command analysis equipment and the quantity identification apparatus;
Wherein, the parallel communication link is for transmitting image between the command analysis equipment and the quantity identification apparatus Data.
4. choke-proof wind-force regulation platform as claimed in claim 3, which is characterized in that the platform further include:
Live timing device is connect with electrical energy consumption analysis equipment, for providing chronograph reference signal for electrical energy consumption analysis equipment;
Electrical energy consumption analysis equipment is connect with the electric power input terminal of orientation capture mechanism, and the orientation capture mechanism is for exporting institute Orientation capture image is stated, voltage that the electrical energy consumption analysis equipment is used to inputted per hour based on the electric power input terminal and per small When the electric current that inputs execute the analysis of the electricity consumption grade to the orientation capture mechanism.
5. choke-proof wind-force regulation platform as claimed in claim 4, which is characterized in that the platform further include:
Component identifies equipment, for receiving the orientation capture image, obtains each pixel in the orientation capture image Saturation degree component value, luma component values and form and aspect component value;
Electric control appliance is connect with the electrical energy consumption analysis equipment, default etc. for being optionally greater than in the electricity consumption grade received When grade threshold value, start the powered operation to component identification equipment and the custom tailored equipment, otherwise, closes to described point The powered operation of amount identification equipment and the custom tailored equipment.
6. choke-proof wind-force regulation platform as claimed in claim 5, which is characterized in that the platform further include:
Custom tailored equipment is connect with component identification equipment, for each pixel in the orientation capture image The saturation degree pattern of each saturation degree component value composition executes dynamic range adjustment, to obtain pattern after the first adjustment, to described The black pattern of each luminance components value composition of each pixel executes dynamic range adjustment in orientation capture image, to obtain Pattern after second adjustment, the orientation capture the form and aspect pattern of each form and aspect component value composition of each pixel in image.
7. choke-proof wind-force regulation platform as claimed in claim 6, which is characterized in that the platform further include:
Pattern processing equipment is connect with the custom tailored equipment, is used for pattern, the second adjustment after the first adjustment Pattern and the form and aspect pattern are overlapped processing afterwards, to obtain real-time adjustment image corresponding with orientation capture image;
Curvature adjusts equipment, connect with the pattern processing equipment, for receiving the real-time adjustment image, and to described real-time It adjusts image and executes curvature adjustment reducing each curvature of each curve in the real-time adjustment image in predetermined curvature Under threshold value, image is adjusted again to obtain.
8. choke-proof wind-force regulation platform as claimed in claim 7, which is characterized in that the platform further include:
Non-linear interpolation equipment is connect, for docking respectively with the smooth Spaces filter apparatus and curvature adjustment equipment The image of adjustment again received executes non-linear interpolation processing, to obtain corresponding non-linear interpolation image, and will be described non-thread Property interpolation image replace the orientation and capture image and be sent to the smooth Spaces filter apparatus;
Wherein, the component identification equipment, the custom tailored equipment, the pattern processing equipment and the curvature adjust equipment The SOC chip of different model is respectively adopted to realize.
9. choke-proof wind-force regulation platform as claimed in claim 8, it is characterised in that:
In the electrical energy consumption analysis equipment, the voltage inputted per hour based on the electric power input terminal and the electricity inputted per hour Stream, which is executed, to be included: the voltage that will be inputted per hour to the analysis of the electricity consumption grade of the orientation capture mechanism and inputs per hour Electric current is multiplied to obtain power consumption per hour, and the use of corresponding orientation capture mechanism is determined based on the power consumption per hour Electric grade;
Wherein, in the electrical energy consumption analysis equipment, the power consumption per hour is bigger, the corresponding orientation capture mechanism determined Electricity consumption higher grade.
CN201910460146.7A 2019-05-30 2019-05-30 Anti-choking wind power regulating platform Active CN110345529B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060093213A1 (en) * 2004-10-28 2006-05-04 Eran Steinberg Method and apparatus for red-eye detection in an acquired digital image based on image quality pre and post filtering
CN107702174A (en) * 2017-11-07 2018-02-16 佛山市云米电器科技有限公司 Oil smoke tracing system and method
CN107781879A (en) * 2017-11-07 2018-03-09 佛山市云米电器科技有限公司 Apparatus for treating cooking fume and method
CN108737772A (en) * 2017-04-13 2018-11-02 广东美的智美科技有限公司 Range hood and interaction noise-reduction method
CN109307301A (en) * 2018-11-30 2019-02-05 林丽 Circulating general type kitchen ventilator
CN109323317A (en) * 2018-12-06 2019-02-12 林丽 Adaptive regulation type range hood
CN109405025A (en) * 2018-12-06 2019-03-01 李珊珍 Near suction range hood

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060093213A1 (en) * 2004-10-28 2006-05-04 Eran Steinberg Method and apparatus for red-eye detection in an acquired digital image based on image quality pre and post filtering
CN108737772A (en) * 2017-04-13 2018-11-02 广东美的智美科技有限公司 Range hood and interaction noise-reduction method
CN107702174A (en) * 2017-11-07 2018-02-16 佛山市云米电器科技有限公司 Oil smoke tracing system and method
CN107781879A (en) * 2017-11-07 2018-03-09 佛山市云米电器科技有限公司 Apparatus for treating cooking fume and method
CN109307301A (en) * 2018-11-30 2019-02-05 林丽 Circulating general type kitchen ventilator
CN109323317A (en) * 2018-12-06 2019-02-12 林丽 Adaptive regulation type range hood
CN109405025A (en) * 2018-12-06 2019-03-01 李珊珍 Near suction range hood

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