CN109655458A - Soundboard iron rust analysis platform - Google Patents

Soundboard iron rust analysis platform Download PDF

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Publication number
CN109655458A
CN109655458A CN201811569393.2A CN201811569393A CN109655458A CN 109655458 A CN109655458 A CN 109655458A CN 201811569393 A CN201811569393 A CN 201811569393A CN 109655458 A CN109655458 A CN 109655458A
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image
soundboard
equipment
connect
iron rust
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CN109655458B (en
Inventor
徐旭栋
叶红春
吴梦梦
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ANHUI XINDALU SPECIAL PAINT Co.,Ltd.
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Ningbo Dibi Billion Trading Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84Systems specially adapted for particular applications
    • 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
    • G06T7/00Image analysis
    • G06T7/10Segmentation; Edge detection
    • G06T7/13Edge detection
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00Image analysis
    • G06T7/10Segmentation; Edge detection
    • G06T7/136Segmentation; Edge detection involving thresholding
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00Indexing scheme for image analysis or image enhancement
    • G06T2207/10Image acquisition modality
    • G06T2207/10024Color image

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

The present invention relates to a kind of soundboard iron rust analysis platforms, comprising: fender mechanism, including keyboard section sweeps interface, interface is swept in keyboard position, pull-up resistor row, MCU controller, midi interface and crystal oscillator equipment, the midi interface are connect with the MCU controller;The working frequency of the crystal oscillator equipment is 6MHz, is connect with the MCU controller, for providing clock signal for the MCU controller;It is 8 parallel-by-bit interfaces that the keyboard section, which sweeps interface, is connect with the one 8 parallel-by-bit pin of the MCU controller;It is 8 parallel-by-bit interfaces that interface is swept in the keyboard position, is connect with the 2nd 8 parallel-by-bit pin of the MCU controller;It is distributed evaluation apparatus, is connect with iron rust analytical equipment, is exported for the sum of the iron rust pixel in soundboard region to be occupied to the ratio of pixel sum in soundboard region as distribution proportion.By means of the invention it is possible to inform that user carries out derusting operation in time.

Description

Soundboard iron rust analysis platform
Technical field
The present invention relates to fender field more particularly to a kind of soundboard iron rust analysis platforms.
Background technique
Fender uses large scale integrated circuit, big multi-configuration sound mnemonic.For storing the true of each kind musical instrument Real sound waveform simultaneously exports when playing.Common electronic organ has music keyboard band automatic accompaniment and synthesizer without automatic companion Two major classes are played, sensu lato fender includes digital piano, is different from electroacoustic piano, uses staff more, and mostly high bass is double Row note spectrum.Sometimes music and numbered musical notation, guitar spectrum in also using.It is generally used for rock music.
Summary of the invention
In order to solve the technical problem that current fender soundboard iron rust excessively causes musical note inaccurate, the present invention provides one kind Soundboard iron rust analysis platform can determine soundboard iron rust distribution situation in time, to remind user to carry out corresponding derusting operation.
The present invention at least has following three important inventive points:
(1) newest standardized test chart is known using time division duplex communication mode, is executed based on standardized test chart to closing fortune The smoothness analysis of treated image is calculated, to determine the need for adding image smoothing movement;
(2) iron rust in soundboard region is determined using the red channel specific distribution of iron rust imaging pixel point System detection;
(3) using the sum of the iron rust pixel in soundboard region occupy soundboard region pixel sum ratio as point Cloth ratio is notified in time to user, to avoid the soundboard for using excessive iron rust.
According to an aspect of the present invention, a kind of soundboard iron rust analysis platform is provided, the platform includes:
Fender mechanism, including keyboard section sweeps interface, interface is swept in keyboard position, pull-up resistor row, MCU controller, MIDI connect Mouth and crystal oscillator equipment, the midi interface are connect with the MCU controller;Wherein, the working frequency of the crystal oscillator equipment is 6MHz is connect with the MCU controller, for providing clock signal for the MCU controller.
More specifically, in the soundboard iron rust analysis platform: it is 8 parallel-by-bit interfaces that the keyboard section, which sweeps interface, with institute State the one 8 parallel-by-bit pin connection of MCU controller.
More specifically, in the soundboard iron rust analysis platform: it is 8 parallel-by-bit interfaces that interface is swept in the keyboard position, with institute State the 2nd 8 parallel-by-bit pin connection of MCU controller.
More specifically, in the soundboard iron rust analysis platform, further includes:
It is distributed evaluation apparatus, is connect with iron rust analytical equipment, for accounting for the sum of the iron rust pixel in soundboard region It is exported according to the ratio of the pixel sum in soundboard region as distribution proportion;Voice plays chip, with the distribution evaluation apparatus Connection, for receiving and playing the distribution proportion in real time;Button video camera is arranged in fender mechanism, for electric steel The in-house execution camera shooting movement of qin, to obtain and export current image frame;Repeatedly adjustment equipment connects with the button video camera It connects, for receiving the current image frame, the multiple color range based on signal-to-noise ratio is executed to the current image frame and is adjusted, to obtain Corresponding repeatedly adjustment image, the signal-to-noise ratio of the current image frame is lower, and the number of the color range adjustment of execution is more;Closed operation Processing equipment connect with color range adjustment equipment, for receiving the multiple adjustment image, holds to the multiple adjustment image Row closed operation processing processing, to obtain and export corresponding closed operation processing image;At data selection equipment, with the closed operation Equipment connection is managed, for receiving the closed operation processing image, the figure based on JiuGongTu is executed to closed operation processing image The image block that nine same sizes are obtained as block acquisition, handles nine of nine image blocks in image for the closed operation Smoothness carries out arithmetic mean of instantaneous value and calculates to obtain closed operation Image Smoothness, is also used to execute based on nine palaces standardized test chart The image block of figure is obtained to obtain the image block of nine same sizes, by the nine of nine image blocks described in the standardized test chart A smoothness carries out arithmetic mean of instantaneous value and calculates to obtain test image smoothness;Smoothing processing equipment is set with data selection Standby connection executes image smoothing movement to closed operation processing image for receiving the unreliable order of the parameter, with Smoothing processing image is obtained, is also used to receiving the reliable in parameters order, using closed operation processing image as smooth Handle image output;Soundboard extract equipment is connect with the smoothing processing equipment, for being based on soundboard benchmark geometric shape from institute It states and searches out corresponding soundboard region in smoothing processing image;Iron rust analytical equipment connect with the soundboard extract equipment, is used for The soundboard region is received, and by red color component value in the soundboard region in iron rust upper limit gray threshold and iron rust lower limit gray scale Pixel between threshold value is as iron rust pixel;Time division duplex communication interface is connect with the data selection equipment, is used for nothing Line knows the standardized test chart, and the standardized test chart is sent to the data selection equipment.
More specifically, in the soundboard iron rust analysis platform: in the data selection equipment, when the closed operation figure When being more than the test image smoothness as smoothness, reliable in parameters order is issued, when the closed operation Image Smoothness does not surpass When crossing the test image smoothness, the unreliable order of parameter is issued.
Specific embodiment
The embodiment of soundboard iron rust analysis platform of the invention will be described in detail below.
Fender is a kind of electrophonic musical instrument.He is that six the seventies of twentieth century rise, the eighties to the nineties morning A kind of musical instrument in certain occasions instead of piano of phase prevalence.
The principle of sound of fender be form electrophoresis using keyboard as on-off switch, once press key, internal crystal oscillator It starts to work, forms the waveform that pulse generates certain frequency, be then passed through the amplification of frequency divider, be sent into loudspeaker sounding.Entirely Voiced process is by simple frequency dividing analog circuit, so keyboard does not have dynamics and hits string feeling, sound is also more mechanical dull.
In order to overcome above-mentioned deficiency, the present invention has built a kind of soundboard iron rust analysis platform, can effectively solve the problem that corresponding Technical problem.
The soundboard iron rust analysis platform shown according to an embodiment of the present invention includes:
Fender mechanism, including keyboard section sweeps interface, interface is swept in keyboard position, pull-up resistor row, MCU controller, MIDI connect Mouth and crystal oscillator equipment, the midi interface are connect with the MCU controller;
Wherein, the working frequency of the crystal oscillator equipment is 6MHz, is connect with the MCU controller, for controlling for the MCU Device processed provides clock signal.
Then, continue that the specific structure of soundboard iron rust analysis platform of the invention is further detailed.
In the soundboard iron rust analysis platform: it is 8 parallel-by-bit interfaces that the keyboard section, which sweeps interface, is controlled with the MCU One 8 parallel-by-bit pin of device connects.
In the soundboard iron rust analysis platform: it is 8 parallel-by-bit interfaces that interface is swept in the keyboard position, is controlled with the MCU 2nd 8 parallel-by-bit pin of device connects.
In the soundboard iron rust analysis platform, further includes:
It is distributed evaluation apparatus, is connect with iron rust analytical equipment, for accounting for the sum of the iron rust pixel in soundboard region It is exported according to the ratio of the pixel sum in soundboard region as distribution proportion;
Voice plays chip, connect with the distribution evaluation apparatus, for reception and plays the distribution proportion in real time;
Button video camera is arranged in fender mechanism, acts for execution camera shooting in-house to fender, to obtain And export current image frame;
Repeatedly adjustment equipment, connect, for receiving the current image frame, to the current figure with the button video camera It is adjusted as frame executes the multiple color range based on signal-to-noise ratio, to obtain corresponding repeatedly adjustment image, the letter of the current image frame It makes an uproar than lower, the number of the color range adjustment of execution is more;
Closed operation processing equipment is connect, for receiving the multiple adjustment image, to described with color range adjustment equipment Repeatedly adjustment image executes closed operation processing processing, to obtain and export corresponding closed operation processing image;
Data selection equipment is connect with the closed operation processing equipment, for receiving the closed operation processing image, to institute It states closed operation processing image and executes the image block acquisition based on JiuGongTu to obtain the image block of nine same sizes, closed described It is flat to obtain closed operation image to carry out arithmetic mean of instantaneous value calculating for nine smoothnesses of nine image blocks in calculation process image Slippery is also used to execute standardized test chart image block of the image block acquisition based on JiuGongTu to obtain nine same sizes, Nine smoothnesses of nine image blocks described in the standardized test chart are carried out arithmetic mean of instantaneous value to calculate to obtain test image Smoothness;
Smoothing processing equipment is connect with the data selection equipment, right for receiving the unreliable order of the parameter The closed operation processing image executes image smoothing movement, to obtain smoothing processing image, is also used to receiving the parameter Reliable commands are exported using closed operation processing image as smoothing processing image;
Soundboard extract equipment is connect with the smoothing processing equipment, for being put down based on soundboard benchmark geometric shape from described Corresponding soundboard region is searched out in sliding processing image;
Iron rust analytical equipment is connect with the soundboard extract equipment, for receiving the soundboard region, and by the soundboard Pixel of the red color component value between iron rust upper limit gray threshold and iron rust lower limit gray threshold is as iron rust pixel in region Point;
Time division duplex communication interface is connect with the data selection equipment, for wirelessly knowing the standardized test chart, and The standardized test chart is sent to the data selection equipment.
In the soundboard iron rust analysis platform: in the data selection equipment, when the closed operation Image Smoothness When more than the test image smoothness, reliable in parameters order is issued, when the closed operation Image Smoothness is less than the survey When trying Image Smoothness, the unreliable order of parameter is issued.
In the soundboard iron rust analysis platform, further includes:
Image sharpening equipment is connect with the smoothing processing equipment, for receiving the smoothing processing image, based on described The noise amplitude of maximum amplitude noise type determines the respective image implemented to the smoothing processing image in smoothing processing image Sharpness, to obtain instant sharpening image.
In the soundboard iron rust analysis platform, further includes:
Edge detection equipment sharpens equipment with described image and connect, and for receiving the instant sharpening image, is based on edge Point tonal range extracts multiple edge pixel points from the instant sharpening image, intends the multiple edge pixel point It closes, to obtain multiple edge lines.
In the soundboard iron rust analysis platform, further includes:
Distribution measurement apparatus is connect, for receiving respectively with the soundboard extract equipment and the edge detection equipment Instant sharpening image and the multiple edge line are stated, the signal-to-noise ratio based on the instant sharpening image schemes the instant sharpening The edge line quantity in each subgraph is measured to obtain multiple subgraphs as carrying out uniform formula division, by edge line quantity More than one or more subgraphs of preset quantity threshold value as one or more target subgraphs to replace the smoothing processing Image is exported to the soundboard extract equipment.
In the soundboard iron rust analysis platform: in the edge detection equipment, being based on marginal point tonal range from institute State extracted in instant sharpening image multiple edge pixel points include: for each of instant sharpening image pixel, It determines whether its gray value falls in the marginal point tonal range, when falling in the marginal point tonal range, determines the picture Vegetarian refreshments is edge pixel point, is non-edge pixels point otherwise.
In the soundboard iron rust analysis platform: in the edge detection equipment, the marginal point tonal range is by side Edge point upper limit gray threshold and marginal point lower limit gray threshold composition.
In addition, MCU controller, i.e. micro-control unit (MicrocontrollerUnit;MCU), also known as single-sheet miniature calculates Machine (Single Chip Microcomputer) or single-chip microcontroller are central processing unit (Central Process Unit; CPU frequency) and specification do appropriate reduction, and by memory (memory), counter (Timer), USB, A/D conversion, UART, The perimeter interfaces such as PLC, DMA or even LCD driving circuit all integrate the computer for forming chip-scale on a single chip, for difference Application do various combination control.Such as mobile phone, PC periphery, remote controler, until automotive electronics, industrial stepper motor, The control etc. of robotic arm, the figure of all visible MCU.It is the MCU market mainstream that 32 MCU, which can be said, and single quotation is 1.5~4 Between dollar, working frequency between 100~350MHz, executes efficiency more preferably, application type is also quite polynary mostly.But 32 MCU can because operand and memory length increase, the program code length of identical function compared with 8/16bit MCU increase by 30~ 40%, this causes embedded OTP/FlashROM memory size cannot be too small, and the external pin number amount of chip explodes, and further limits to The cost cutting ability of 32bit MCU.
Using soundboard iron rust analysis platform of the invention, excessively lead to musical note for fender soundboard iron rust in the prior art Inaccurate technical problem is known newest standardized test chart by using time division duplex communication mode, is held based on standardized test chart Row analyzes the smoothness of closed operation treated image, to determine the need for adding image smoothing movement;Using iron rust at As the specific distribution of the red channel of pixel is customized detection to the iron rust in soundboard region;Importantly, will The ratio that the sum of iron rust pixel in soundboard region occupies the pixel sum in soundboard region is led in time as distribution proportion Know to user, to avoid the soundboard for using excessive iron rust.
It is understood that although the present invention has been disclosed in the preferred embodiments as above, above-described embodiment not to Limit the present invention.For any person skilled in the art, without departing from the scope of the technical proposal of the invention, Many possible changes and modifications all are made to technical solution of the present invention using the technology contents of the disclosure above, or are revised as With the equivalent embodiment of variation.Therefore, anything that does not depart from the technical scheme of the invention are right according to the technical essence of the invention Any simple modifications, equivalents, and modifications made for any of the above embodiments still fall within the range of technical solution of the present invention protection It is interior.

Claims (10)

1. a kind of soundboard iron rust analysis platform characterized by comprising
Fender mechanism, including keyboard section sweeps interface, interface is swept in keyboard position, pull-up resistor row, MCU controller, midi interface and Crystal oscillator equipment, the midi interface are connect with the MCU controller;
Wherein, the working frequency of the crystal oscillator equipment is 6MHz, is connect with the MCU controller, for being the MCU controller Clock signal is provided.
2. soundboard iron rust analysis platform as described in claim 1, it is characterised in that:
It is 8 parallel-by-bit interfaces that the keyboard section, which sweeps interface, is connect with the one 8 parallel-by-bit pin of the MCU controller.
3. soundboard iron rust analysis platform as claimed in claim 2, it is characterised in that:
It is 8 parallel-by-bit interfaces that interface is swept in the keyboard position, is connect with the 2nd 8 parallel-by-bit pin of the MCU controller.
4. soundboard iron rust analysis platform as claimed in claim 3, which is characterized in that the platform further include:
It is distributed evaluation apparatus, is connect with iron rust analytical equipment, for the sum of the iron rust pixel in soundboard region to be occupied sound The ratio of the pixel sum in plate region is exported as distribution proportion;
Voice plays chip, connect with the distribution evaluation apparatus, for reception and plays the distribution proportion in real time;
Button video camera, be arranged in fender mechanism, for executions camera shooting in-house to fender act, with acquisition and it is defeated Current image frame out;
Repeatedly adjustment equipment, connect, for receiving the current image frame, to the current image frame with the button video camera The multiple color range adjustment based on signal-to-noise ratio is executed, to obtain corresponding repeatedly adjustment image, the signal-to-noise ratio of the current image frame Lower, the number of the color range adjustment of execution is more;
Closed operation processing equipment is connect with color range adjustment equipment, for receiving the multiple adjustment image, to described multiple It adjusts image and executes closed operation processing processing, to obtain and export corresponding closed operation processing image;
Data selection equipment is connect with the closed operation processing equipment, for receiving the closed operation processing image, is closed to described Calculation process image executes the image block based on JiuGongTu and obtains to obtain the image block of nine same sizes, by the closed operation Nine smoothnesses for handling nine image blocks in image carry out arithmetic mean of instantaneous value and calculate to obtain closed operation Image Smoothness, It is also used to execute standardized test chart the image block based on JiuGongTu and obtain to obtain the image block of nine same sizes, it will be described Nine smoothnesses of nine image blocks carry out arithmetic mean of instantaneous value calculating to obtain test image smoothness in standardized test chart;
Smoothing processing equipment is connect with the data selection equipment, for receiving the unreliable order of the parameter, to described Closed operation handles image and executes image smoothing movement, to obtain smoothing processing image, is also used to receiving the reliable in parameters Order is exported using closed operation processing image as smoothing processing image;
Soundboard extract equipment is connect with the smoothing processing equipment, for based on soundboard benchmark geometric shape from it is described it is smooth from Corresponding soundboard region is searched out in reason image;
Iron rust analytical equipment is connect with the soundboard extract equipment, for receiving the soundboard region, and by the soundboard region Pixel of the middle red color component value between iron rust upper limit gray threshold and iron rust lower limit gray threshold is as iron rust pixel;
Time division duplex communication interface is connect with the data selection equipment, for wirelessly knowing the standardized test chart, and by institute It states standardized test chart and is sent to the data selection equipment.
5. soundboard iron rust analysis platform as claimed in claim 4, it is characterised in that:
In the data selection equipment, when the closed operation Image Smoothness is more than the test image smoothness, issue It is unreliable to issue parameter when the closed operation Image Smoothness is less than the test image smoothness for reliable in parameters order Order.
6. soundboard iron rust analysis platform as claimed in claim 5, which is characterized in that the platform further include:
Image sharpening equipment is connect with the smoothing processing equipment, for receiving the smoothing processing image, based on described smooth The noise amplitude of maximum amplitude noise type, which determines, in processing image sharpens the respective image that the smoothing processing image is implemented Degree, to obtain instant sharpening image.
7. soundboard iron rust analysis platform as claimed in claim 6, which is characterized in that the platform further include:
Edge detection equipment sharpens equipment with described image and connect, for receiving the instant sharpening image, based on marginal point ash Degree range extracts multiple edge pixel points from the instant sharpening image, is fitted to the multiple edge pixel point, with Obtain multiple edge lines.
8. soundboard iron rust analysis platform as claimed in claim 7, which is characterized in that the platform further include:
Distribution measurement apparatus is connect with the soundboard extract equipment and the edge detection equipment respectively, for receive it is described i.e. When sharpening image and the multiple edge line, the signal-to-noise ratio based on the instant sharpening image to the instant sharpening image into The uniform formula of row divides, and to obtain multiple subgraphs, measures the edge line quantity in each subgraph, is more than by edge line quantity One or more subgraphs of preset quantity threshold value are as one or more target subgraphs to replace the smoothing processing image It exports to the soundboard extract equipment.
9. soundboard iron rust analysis platform as claimed in claim 8, it is characterised in that:
In the edge detection equipment, multiple edge pictures are extracted from the instant sharpening image based on marginal point tonal range Vegetarian refreshments includes: to determine whether its gray value falls in the marginal point for each of instant sharpening image pixel In tonal range, when falling in the marginal point tonal range, determines that the pixel is edge pixel point, be non-edge otherwise Pixel.
10. soundboard iron rust analysis platform as claimed in claim 9, it is characterised in that:
In the edge detection equipment, the marginal point tonal range is by marginal point upper limit gray threshold and marginal point lower limit ash Spend threshold value composition.
CN201811569393.2A 2018-12-21 2018-12-21 Soundboard iron rust analysis platform Active CN109655458B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113249949A (en) * 2021-05-27 2021-08-13 孔华 Cotton discharge quality judgment system and method for automatic cotton fluffing structure

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Publication number Priority date Publication date Assignee Title
JP2009031704A (en) * 2007-07-27 2009-02-12 Technos Nakata:Kk Piano and moisture absorption object
CN203773933U (en) * 2014-03-28 2014-08-13 海伦钢琴股份有限公司 Electrical piano provided with soundboard resonance structure
CN207009073U (en) * 2017-08-16 2018-02-13 昊智信息技术(深圳)有限公司 A kind of electronics sound source of piano
CN107782733A (en) * 2017-09-30 2018-03-09 中国船舶重工集团公司第七〇九研究所 Image recognition the cannot-harm-detection device and method of cracks of metal surface
CN207165227U (en) * 2017-09-22 2018-03-30 董馥伊 A kind of key counter weight type emulates fender
CN207704856U (en) * 2017-08-15 2018-08-07 北京库客音乐股份有限公司 The fender of adjustable sound quality

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009031704A (en) * 2007-07-27 2009-02-12 Technos Nakata:Kk Piano and moisture absorption object
CN203773933U (en) * 2014-03-28 2014-08-13 海伦钢琴股份有限公司 Electrical piano provided with soundboard resonance structure
CN207704856U (en) * 2017-08-15 2018-08-07 北京库客音乐股份有限公司 The fender of adjustable sound quality
CN207009073U (en) * 2017-08-16 2018-02-13 昊智信息技术(深圳)有限公司 A kind of electronics sound source of piano
CN207165227U (en) * 2017-09-22 2018-03-30 董馥伊 A kind of key counter weight type emulates fender
CN107782733A (en) * 2017-09-30 2018-03-09 中国船舶重工集团公司第七〇九研究所 Image recognition the cannot-harm-detection device and method of cracks of metal surface

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113249949A (en) * 2021-05-27 2021-08-13 孔华 Cotton discharge quality judgment system and method for automatic cotton fluffing structure

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