CN117825669A - Online detection system for quality of ginned cotton under quantitative condition and application method - Google Patents
Online detection system for quality of ginned cotton under quantitative condition and application method Download PDFInfo
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- 229920000742 Cotton Polymers 0.000 title claims abstract description 343
- 238000001514 detection method Methods 0.000 title claims abstract description 195
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000005070 sampling Methods 0.000 claims abstract description 109
- 230000001105 regulatory effect Effects 0.000 claims abstract description 53
- 238000005303 weighing Methods 0.000 claims abstract description 38
- 239000012535 impurity Substances 0.000 claims abstract description 33
- 238000005096 rolling process Methods 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 21
- 238000011084 recovery Methods 0.000 claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 238000009434 installation Methods 0.000 claims abstract description 9
- 238000011897 real-time detection Methods 0.000 claims description 23
- 238000003825 pressing Methods 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 238000005056 compaction Methods 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 238000009960 carding Methods 0.000 claims description 4
- 239000005304 optical glass Substances 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000012545 processing Methods 0.000 abstract description 40
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000007790 scraping Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000013441 quality evaluation Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/36—Textiles
- G01N33/362—Material before processing, e.g. bulk cotton or wool
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/52—Weighing apparatus combined with other objects, e.g. furniture
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The invention belongs to the field of cotton processing equipment. The on-line detection system for the quality of the ginned cotton under the quantitative condition comprises a detection device and a control system, wherein the detection device mainly comprises a quantitative sampling device, a weighing device and a ginned cotton quality detection device, and the quantitative sampling device comprises a detection device connecting plate, an installation bottom plate, a sampling plate, a rotating shaft, a linear guide rail, a negative pressure regulating mechanism and a pneumatic nozzle; the application method is based on three functional modules formed by an online detection system, logic control is performed through a PLC, and the processes of quantitative sampling, sample detection and sample recovery of ginned cotton in a negative pressure conveying link are completed; the online detection system and the application method are economical and practical, have higher detection efficiency and accuracy, can quickly realize the integrated automatic detection of the color level, the rolling quality, the moisture regain and the impurity content of cotton in the processing process, and solve the technical problem that the detection precision of ginned cotton is affected by the sampling amount each time in the processing process.
Description
Technical Field
The invention relates to an online detection system for ginned cotton quality under quantitative conditions, and belongs to the technical field of cotton processing equipment.
Background
With the popularization of the whole-process mechanized picking of cotton, the cotton picking efficiency is obviously improved. However, the popularization of mechanically-picked cotton leads to the reduction of cotton processing quality, and the effective monitoring of the change of ginned cotton quality parameters in the processing link has important significance for improving quality and efficiency of cotton.
In recent years, cotton processing quality in China is wholly declining, and color grade is particularly obvious. The color grade of cotton is an important index for evaluating the appearance quality of cotton fibers, is closely related to the internal quality of cotton, and has direct influence on the weaving, dyeing and subsequent processing technology of textiles. The detection of color level receives factors such as weight, pressure, density of cotton and the like and influences greatly, and the cotton sample quantification detection can not be realized in the present online detection link, leads to the pressure, the density of cotton sample unstable in the color level detection process, and the testing result is inaccurate, and it is highly desirable to develop an on-line ginned cotton quality detection device under quantitative conditions, and the accuracy of color level detection is improved.
The ginned cotton rolling quality is used for indicating the appearance form roughness degree of ginned cotton and the degree of the contained defect types. The quality of the rolling process directly influences the use value of the ginned cotton. The detection of ginned cotton rolling quality is not performed in the current online detection system. The invention realizes the on-line detection of the ginned cotton rolling quality by utilizing the image detection and the machine vision technology, and can accurately and rapidly grade the ginned cotton rolling quality.
The moisture regain of cotton is also one of the important indexes affecting the cotton processing parameters, and a high moisture regain can make the cotton difficult to clean, and can also affect the cotton to smoothly enter the ginning working box. Conversely, too low a moisture regain can also result in a strong electrostatic adsorption effect on the cotton fibers and metal surfaces, causing cotton fibers to accumulate inside the machine, causing machine blockage and shutdown. The method for monitoring the change of the moisture regain of the cotton in the processing process in real time has important significance for adjusting the technological parameters of the cotton processing process. The common methods for detecting the moisture regain of cotton in the current processing link comprise an online sampling compression type and a pin type. The on-line sampling compression type is generally installed on a pipeline, and the detection precision can be influenced by the sampling amount of each time. Since different sampling amounts can lead to different compaction states of cotton, larger fluctuation of detection data can occur when an online sampling compression method is used for detection, and accuracy is reduced. The pins do not have a special sampling mechanism and require the cotton to be compacted manually or by a special mechanism. Patent CN 212433035U describes an on-line detection device for cotton moisture regain, which consists of a detection electrode group, a guide plate, a microprocessor and a display module, and the cotton is compacted on the detection electrode by means of the gravity of the cotton, and is placed in a cotton conveying pipeline for detecting the cotton moisture regain. However, in the detection process, the quantitative inaccuracy causes low detection precision of the moisture regain, influences the subsequent cotton quality evaluation effect, further improves the quantitative accuracy, can effectively improve the moisture regain detection precision, provides more accurate data support for subsequent production links, and improves the cotton quality. Therefore, development of a cotton moisture regain online detection device is urgently needed, and the stability of cotton pressure and compaction state during cotton moisture regain detection can be improved, so that the accuracy and stability of cotton moisture regain detection are improved, and the requirements of cotton moisture regain detection in different processing links are met.
The impurity content becomes an important standard for quality evaluation of mechanical cotton picking and cotton picking machinery. The existing method for detecting the cotton impurities by mechanical picking is complex in procedure and low in efficiency. The image processing technology can realize quick detection of cotton impurity in machine picking and improve production efficiency, but prediction of impurity content by utilizing machine vision cannot obtain accurate weight, and the predicted value has larger error, so that a ginned cotton impurity content prediction model for accurately obtaining cotton sample weight is required to be used for accurately detecting ginned cotton impurity content in a processing link. Meanwhile, in the GB/T6499-2020 raw cotton impurity rate test method, the impurity rate test sample quantity of the raw cotton is adjusted to 50g, quantitative detection meets national standard requirements, the ginned cotton in the processing link is subjected to online quantitative sampling, the weight of a cotton sample is accurately obtained, and calculation errors caused by unknown weight of the detected cotton sample during online calculation of the ginned cotton impurity rate in the processing link are greatly eliminated. Meanwhile, for the cotton processing technology, different processing links have different functions, and the optimal processing technological parameters of each link are also different. Considering the physical characteristics of cotton fibers, detecting the quality index of ginned cotton in the processing link in real time has very important significance for improving and optimizing the cotton processing technological parameters.
Patent CN 202837167U describes an online detection control system for cotton ginning, which mainly comprises a control processing unit, a sampler and an online detection unit, and can realize online detection of quality of cotton sample such as moisture, color, impurities and the like. However, the detection systems implemented in different countries are different, and differences exist between detection data, and the system cannot finish the detection of cotton quality under quantitative conditions.
The intelligent online detection system for YZ-1 cotton processing and production mainly comprises a seed cotton workstation, a ginned cotton workstation, a control system and central processing software, wherein a cotton sample is grabbed by a gripper and compacted on a test window, and the acquisition of relevant information such as moisture regain, impurity content and color of the cotton sample is completed. However, because the use environment is low in temperature and uneven in relative humidity, the detection result has a certain difference with national public detection data, and indexes such as color level, impurity content, moisture regain and the like of the system are respectively carried out on two different detection instruments, so that the online detection process is complex and tedious.
In summary, the invention provides a system and a method for detecting the quality of ginned cotton on line under quantitative conditions, which are applied to processing links, wherein the system combines the characteristics of ginned cotton materials, realizes an integrated automatic detection flow of quantitative cotton sampling, quality detection and cotton sample recovery through a PLC control technology and a modern mechanical design means, greatly reduces the labor intensity of operators and improves the precision and efficiency of the online detection of the quality of ginned cotton.
Disclosure of Invention
The invention aims at: according to the quantitative cotton quality online detection system, the quantitative sampling module is used for taking (50+/-5) g of cotton samples from a cotton conveying pipeline into the online detection system, the real-time detection of the quality of cotton samples is completed through the detection module, the problem that the quality detection precision of the cotton samples in the negative pressure conveying link is affected by sampling is solved, and the automatic online detection functions integrating quantitative sampling, real-time detection and sample recovery are realized.
The invention further aims to provide an application method of the lint quality online detection system under quantitative conditions, wherein the application method is simple and convenient to operate, and can be used for realizing quick calibration.
The invention discloses a ginned cotton quality online detection system under a quantitative condition, which comprises a detection device and a control system, wherein the detection device mainly comprises a quantitative sampling device, a weighing device and a ginned cotton quality detection device, and the control system mainly comprises an industrial personal computer and a PLC;
the quantitative sampling device mainly comprises a detection device connecting plate, an installation bottom plate, a sampling plate, a rotating shaft, a linear guide rail, a negative pressure regulating mechanism and a pneumatic nozzle; a cotton sample port is arranged on the connecting plate of the detection device;
the linear guide rail is fixed on a connecting plate of the detection device, and the negative pressure regulating mechanism structurally comprises a cylinder I, a cylinder II, a negative pressure regulating plate I and a negative pressure regulating plate II, wherein the negative pressure regulating plate I and the negative pressure regulating plate II are covered on the cotton sample port and can move up and down under the action of the cylinder I and the cylinder II respectively;
the sampling plate is in a comb-shaped plate structure, a plurality of strip-shaped cotton carding openings are arranged on the comb-shaped plate at intervals, and the rotating shaft is connected with the sampling plate and can do reciprocating rotary motion along with the rotating shaft; the pneumatic nozzles are arranged on two sides of the sampling plate, and the openings are aligned to the position of the sampling plate;
the weighing device is close to the cotton sample port and mainly structurally comprises a quantitative cotton collecting box, a weighing sensor and a cushion block; the weighing sensor is arranged on the cushion block, the cushion block is fixed on the mounting bottom plate, the quantitative cotton collecting box is arranged right above the weighing sensor, the upper end, the front end and the rear end of the quantitative cotton collecting box are all open, and the open position of the front end is flush with the cotton sample opening;
the quality detection device is positioned behind the quantitative cotton collecting box and aligned with the quantitative cotton collecting box, and the structure of the quality detection device mainly comprises a sliding table module, a movable guide rail and an information acquisition device; the sliding table module is arranged at the center of the mounting bottom plate; the information detection module is connected with the movable guide rail and driven by the sliding table module to move back and forth; the information acquisition device is provided with a detection device shell, and a detection electrode plate, optical transparent glass, an LED annular light source and an industrial camera are arranged in the detection device shell; the optical transparent glass is fixed at the front end of the detection device shell; the electrode measuring plates are arranged on two sides of the transparent optical glass; the LED annular light source is arranged at the central position in the shell of the detection device; the industrial camera is mounted in a rear end center position within the detection device housing.
Preferably, the detection device connecting plate is further provided with a mounting top plate and a mounting side plate, the rotating shaft is driven to rotate by a servo motor, the mounting top plate is provided with a strip-shaped through hole, the strip-shaped through hole is fixed on the detection device connecting plate by a bolt, and the negative pressure adjusting mechanism can move up and down under the action of an air cylinder through the strip-shaped through hole; the installation side plates are fixed on the detection device connecting plate through bolts and are respectively provided with a round hole and a waist-shaped hole, the rotating shaft is installed between the two installation side plates through the round holes and the bearings, and the pneumatic nozzle penetrates through the waist-shaped holes to align to the position of the sampling plate; the mounting bottom plate is fixedly connected with the mounting side plate through a reinforcing rib and a bolt; the servo motor is provided with a speed reducer and a motor seat, and is fixedly connected to the mounting side plate through bolts; the sampling plate is fixedly connected to the rotating shaft through a screw and performs reciprocating rotation along with the rotating shaft; the rotating shaft is connected with the speed reducer through a coupler, and is driven by the servo motor to perform rotary sampling motion; the linear guide rail is fixed on the connecting plate of the detection device through a screw; the cylinder I and the cylinder II are fixed on the connecting plate of the detection device through a cylinder connecting piece; the negative pressure regulating plate I and the negative pressure regulating plate II are connected with the linear guide rail through sliding blocks.
Preferably, the control system is provided with a control cabinet, the industrial personal computer and the PLC are installed in the control cabinet, and the control cabinet is fixedly connected under the installation bottom plate through threads; the control cabinet comprises a control cabinet shell, a cotton sample weight real-time reading software, a color level prediction model software, a rolling working medium prediction model software, a moisture regain prediction model software and a impurity content prediction model software, wherein a touch screen is arranged on the control cabinet shell; and the quantitative sampling device, the weighing device and the quality detection device are controlled by the PLC to complete information acquisition and uploading of cotton sample weight, resistance and digital images, and uploaded data are processed by color level prediction model software, rolling quality prediction model software, moisture regain prediction model software and impurity content prediction model software.
The invention discloses an application method of a ginned cotton quality online detection system under the quantitative condition, which is to be protected, based on the ginned cotton quality online detection system, logic control is carried out through a PLC, and the processes of ginned cotton quantitative sampling, cotton sample detection and cotton sample recovery in a negative pressure conveying link are completed, and mainly comprise the following steps:
(1) Preparing an on-line ginned cotton quality detection system under the quantitative condition, so that a cotton sample port on a connecting plate of the detection device is aligned with an opening on a negative pressure cotton conveying pipeline, and checking the initial position of equipment, wherein the servo motor is positioned at a zero position, the air cylinders I and II are positioned at the zero position, the sliding table module is positioned at the zero position, and the pneumatic nozzle is in a closed state;
(2) The system is started, the LED annular light source is turned on, and the brightness of an image acquisition environment is ensured; the industrial camera is opened and is communicated with the industrial personal computer, so that image information is guaranteed to be uploaded in time; the weighing sensor is opened and is communicated with the industrial personal computer, and is used for reading the weight of the cotton sample in real time and uploading the weight;
(3) The sampling device quantitatively samples: the system is started, the air cylinder II is opened to drive the negative pressure regulating plate II to move upwards, the cotton sample port is opened, the servo motor is rotated positively to drive the sampling plate to rotate for 60 degrees to stay for 3 seconds in the inner side direction of the negative pressure cotton conveying pipeline, the servo motor is rotated reversely to drive the sampling plate to rotate for 80 degrees in the outer side direction of the negative pressure cotton conveying pipeline after sampling is completed, the air cylinder II is closed to drive the negative pressure regulating plate II to move downwards, the cotton sample port is closed, meanwhile, the pneumatic nozzle starts to blow air, cotton on the sampling plate is blown to a quantitative cotton collecting box below, and sampling is finished;
(4) And (3) sample real-time detection: after the cotton sample is taken to a quantitative cotton collecting box, the weighing device acquires the accurate weight of the cotton sample in real time and uploads the accurate weight to an industrial personal computer, the sliding table module moves forwards to drive the detection device to move forwards for pressing cotton, meanwhile, the electrode plate is tested to contact the cotton to acquire cotton sample resistance information, the industrial camera acquires a cotton sample compaction picture and uploads the acquired data information to the industrial personal computer, and the real-time detection of the quality of the ginned cotton sample is completed through pre-installed color level prediction model software, rolling quality prediction model software, moisture regain prediction model software and impurity content prediction model software;
(5) Cotton sample recovery: after the real-time detection of the cotton sample is finished, the sliding table module moves backwards to drive the detection device to move backwards to release the cotton pressing force, the air cylinder I works, the cotton sample port is opened, the cotton sample is sucked back to the negative pressure cotton conveying pipeline by utilizing the negative pressure environment in the negative pressure cotton conveying pipeline, and the cotton sample recovery work is completed.
The invention relates to an on-line detection system for ginned cotton quality under quantitative conditions and an application method thereof, and the working principle and technical effects thereof are detailed below.
The invention discloses a working principle of an on-line detecting system for ginned cotton quality under a quantitative condition:
the system starts, cylinder II opens, drives negative pressure regulating plate II and reciprocates, and cotton sample mouth is opened, servo motor corotation drives the sampling board to the inboard rotation 60 of negative pressure cotton conveying pipeline and stop 3s, begins to take a sample the work, after the sample is accomplished, servo motor reversal drives the sampling board to the cotton conveying pipeline outside rotation 80 of negative pressure, cylinder II closes, drives negative pressure regulating plate II and reciprocates, and cotton sample mouth closes, simultaneously pneumatic nozzle begins to blow, blows the cotton on the sampling board to quantitative cotton collection box, and the sample is accomplished.
After the cotton sample is taken to a quantitative cotton collecting box, the weighing device weighs the cotton sample in real time, the obtained accurate weight of the cotton sample is uploaded to an industrial personal computer, the sliding table module moves forwards to drive the detection device to move forwards for pressing cotton, meanwhile, the electrode measuring plate contacts the cotton to obtain cotton sample resistance information, the industrial camera collects cotton sample compaction pictures, the collected data information is uploaded to the industrial personal computer, and the real-time detection of the quality of the ginned cotton sample is completed through pre-installed color level prediction model software, rolling medium quantity prediction model software, moisture regain prediction model software and impurity content prediction model software;
after the real-time detection of the sample is completed, the sliding table module moves backwards to drive the detection device to move backwards to release the cotton pressing force, the air cylinder I works, the cotton sample port is opened, and the cotton sample is sucked back to the cotton conveying pipeline by utilizing the negative pressure environment in the negative pressure cotton conveying pipeline to complete the cotton sample recovery work.
The beneficial effects are that:
in the structure of the ginned cotton quality online detection system under the quantitative condition, a sampling plate of the quantitative sampling device adopts a square plate with strip holes, which is more beneficial to sampling cotton samples on a sampling plate to be piled up in a negative pressure environment of a cotton conveying pipeline; meanwhile, pneumatic nozzles are additionally arranged on two sides of the sampling plate, so that cotton samples can fall to the quantitative cotton collecting box conveniently.
In the negative pressure regulating mechanism, the negative pressure regulating plate drives the upper negative pressure regulating plate and the lower negative pressure regulating plate respectively through two air cylinders to move downwards and upwards, and an original old sampling port and a sample discharging port are combined into one port, namely, a large cotton sample port is formed in a connecting plate of the detecting device. Sampling from the cotton sample port when the upper negative pressure regulating plate is opened; when the lower negative pressure regulating plate is opened, cotton sample recovery is performed from the cotton sample port.
Among the cotton quality detection device of ginned leather, cancel the slide rail structure that sets up at the information acquisition box among the prior art, install guide rail (side and bottom surface) between shell body and the interior casing promptly, the gyro wheel on the guide rail is hugged closely to interior casing, but the back and forth slip, supplementary interior casing removes. The invention simplifies the information acquisition device, cancels the guide slide rail, and ensures lower production cost and convenient maintenance by connecting the slide block with the linear guide rail.
The cotton quality online detection system under the quantitative condition has reasonable structure, is economical and applicable, and can efficiently and accurately complete the real-time detection of cotton in the negative pressure conveying link. According to the system, a square strip-shaped hole structure of the sampling plate is utilized, so that the negative pressure environment of the cotton conveying pipeline can be effectively utilized, and cotton samples are accumulated on the sampling plate; the system is designed with the movable negative pressure regulating plate, and the negative pressure conveying environment in the cotton conveying pipeline can be effectively isolated by controlling the negative pressure regulating plate to be opened and closed through the air cylinder, so that a stable detection environment is provided for cotton sample detection, and the on-line detection precision and stability are improved; the pneumatic nozzles are arranged on two sides of the sampling plate, so that cotton on the sampling plate can be blown to the quantitative cotton collecting box completely, and the problem of inaccurate weighing result caused by adhesion of the cotton sample on the sampling plate is effectively solved; the quick quantitative sampling of the ginned cotton in the conveying link is realized by combining the sampling mechanism, the negative pressure regulating mechanism and the pneumatic cotton scraping mechanism, and the technical problem that the ginned cotton detection precision is affected by the sampling quantity every time in the processing process is solved. The invention utilizes image processing and machine vision methods to detect color level and rolling quality, establishes a color level prediction model and a rolling quality prediction model, utilizes a resistance method to measure the moisture regain of a cotton sample, embeds a metal electrode plate on optical transparent glass, acquires the resistance value of the cotton sample while acquiring image information, and acquires the accurate value of the moisture regain of the cotton sample by utilizing the moisture regain prediction model established by a normalization method. The cotton sample image information is acquired through the data information acquisition device, the impurity area is acquired by dividing the impurity by adopting a threshold dividing method, and the impurity content of the cotton sample is calculated by utilizing the weight of the impurity and the accurate weight of the ginned cotton. Aiming at the problems of complex detection procedures, slower speed, non-ideal detection effect and the like of various indexes of the ginned cotton, the online ginned cotton detection system in the processing link realizes quick evaluation and real-time detection of the quality of the ginned cotton.
The quantitative detection system for the quality of the ginned cotton under the quantitative condition provided by the invention takes the quantitative sampling device as a core, solves the problem that the detection precision of the system is greatly influenced by the change of the sampling weight, and realizes quantitative detection of the quality of the ginned cotton in a negative pressure conveying link. The online detection system with the quantitative sampling device as a core can provide more accurate ginned cotton quality detection information and powerful data support for the normal operation of an intelligent processing system. The cotton sample in the complex flow field environment can be quantitatively taken out, the problem that the manual sampling of the processing link is time-consuming and labor-consuming is solved, the detection requirements of the color level, the rolling quality, the moisture regain and the impurity content of the ginned cotton of the processing link are met, and meanwhile, technical support is provided for detecting indexes such as the length, the fracture specific strength and the micronaire value of the ginned cotton of the processing link.
The system is simple in structure and convenient to operate, can realize quantitative detection of the quality of ginned cotton in a conveying link in a rapid calibration mode, and achieves an automatic online detection function integrating quantitative sampling, real-time detection and sample recovery into a whole according to GB1103.1-2012 saw-tooth processed fine cotton standard, GB/T6102.2-2012 raw cotton moisture regain test method, GB/T6499-2020 raw cotton impurity content test method and material characteristics of ginned cotton in a processing link.
The application method of the ginned cotton quality online detection system provided by the invention is simple, convenient to operate, and based on three functional modules formed by the online detection system, logic control is performed through a PLC (programmable logic controller), and the processes of quantitative sampling, sample detection and sample recovery of ginned cotton in a negative pressure conveying link are completed; the method effectively utilizes the online detection system, and accurately acquires the color level, rolling quality, moisture regain and impurity content of ginned cotton in a negative pressure conveying link through the processes of system startup, quantitative sampling, automatic cotton scraping, cotton sample weighing, real-time detection, sample recovery and system shutdown, thereby providing accurate feedback information for cotton processing technological parameter adjustment.
The online detection system and the application method are economical and practical, have higher detection efficiency and accuracy, accurately acquire the color level, rolling quality, moisture regain and impurity content of ginned cotton in a negative pressure conveying link through the processes of system startup, quantitative sampling, automatic cotton scraping, cotton sample weighing, real-time detection, sample recovery and system shutdown, and provide accurate feedback information for cotton processing technological parameter adjustment; the cotton quality integrated real-time detection in the processing process can be realized rapidly, and the technical problem that the ginned cotton detection precision in the processing process is affected by the sampling amount every time is solved.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the lint quality online detection system under the quantitative condition of the invention.
Fig. 2 is a schematic side view of fig. 1.
FIG. 3 is a schematic diagram of the connection position relationship between the connection plate of the detection device and the quantitative sampling device and the weighing device in the three-dimensional structure.
Fig. 4 is a schematic view of the structure of the negative pressure regulating mechanism in the closed state.
Fig. 5 is a schematic view of the structure of the negative pressure regulating mechanism in the opened state.
FIG. 6 is a schematic diagram of the connection relationship of the sampling plate according to the present invention.
Fig. 7 is a schematic perspective view of a quality inspection apparatus according to the present invention.
Fig. 8 is a schematic perspective view of a weighing apparatus according to the present invention.
Fig. 9 is a flow chart of an application method of the lint quality online detection system under the quantitative condition of the invention.
In the drawings: 1 is a detection device connecting plate, 2 is a linear guide rail I, 3 is a servo motor, 4 is a speed reducer, 5 is a motor base, 6 is a rotating shaft, 7 is a sampling plate, 8 is a cylinder I, 9 is a negative pressure regulating plate I, 10 is a connecting plate I, 11 is a quantitative cotton collecting box, 12 is a weighing sensor, 13 is a cushion block, 14 is a mounting bottom plate, 15 is a reinforcing rib, 16 is a cylinder II, 17 is a mounting side plate, 18 is a pneumatic nozzle, 19 is a negative pressure regulating plate I, 20 is a mounting top plate, 21 is a connecting plate II, 22 is a linear guide rail II, 23 is a sliding table module, 24 is a movable guide rail, 25 is a measuring electrode plate, 26 is transparent optical glass, 27 is a detection device shell, 28 is an LED annular light source, 29 is an industrial camera, 30 is a supporting plate, 31 is an on-line detection device shell, 32 is a control cabinet, 33 is a cotton sample opening, and 34 is a cotton carding opening.
Detailed Description
The invention will be described in further detail by means of specific embodiments with reference to the accompanying drawings.
Example 1:
the on-line ginned cotton quality detection system under the quantitative condition comprises a detection device and a control system, wherein the detection device mainly comprises a quantitative sampling device, a weighing device and a ginned cotton quality detection device, and the control system mainly comprises an industrial personal computer and a PLC;
the quantitative sampling device mainly comprises a detection device connecting plate 1, a mounting bottom plate 14, a sampling plate 7, a rotating shaft 6, a linear guide rail, a negative pressure regulating mechanism and a pneumatic nozzle 18; the detection device connecting plate 1 is provided with a cotton sample port 33.
Linear guide I2, linear guide II 22 are fixed in on the detection device connecting plate 1, negative pressure adjustment mechanism, its structure contains cylinder I8, cylinder II 16, negative pressure regulating plate I9, negative pressure regulating plate II 19 cover in on the cotton sample mouth 33, but the upper and lower shift position under cylinder I8, cylinder II 16 effect respectively.
The sampling plate 7 is in a comb-shaped plate structure, a plurality of strip-shaped cotton carding openings 34 are arranged on the comb-shaped plate at intervals, and the rotating shaft 6 is connected with the sampling plate 7 and can do reciprocating rotary motion along with the rotating shaft 6; the pneumatic nozzles 18 are arranged on two sides of the sampling plate 7, and the openings are aligned with the sampling plate 7.
The weighing device is close to the cotton sample port 33, and the structure of the weighing device mainly comprises a quantitative cotton collecting box 11, a weighing sensor 12 and a cushion block 13; the weighing sensor 12 is mounted on the cushion block 13, the cushion block 13 is fixed on the mounting base plate 14, the quantitative cotton collecting box 11 is arranged right above the weighing sensor 12, the upper end, the front end and the rear end of the quantitative cotton collecting box 11 are all open, and the open position of the front end is flush with the cotton sample opening 33.
The quality detection device is positioned behind the quantitative cotton collection box 11 and aligned with the quantitative cotton collection box 11, and the structure of the quality detection device mainly comprises a sliding table module 23, a movable guide rail 24 and an information acquisition device; the sliding table module 23 is arranged at the center of the mounting bottom plate 14; the mobile guide rail 24 is positioned at one side of the sliding table module 23, and the information detection module is connected with the mobile guide rail 24 and driven by the sliding table module 23 to move back and forth; the information acquisition device is provided with a detection device shell 27, and a detection electrode plate 25, optical transparent glass 26, an LED annular light source 28 and an industrial camera 29 are arranged in the detection device shell 27; the optical transparent glass 26 is fixed at the front end of the detection device shell 27; the measuring electrode plates 25 are arranged at two sides of the transparent optical glass 26; the LED annular light source 28 is arranged at the central position in the shell 27 of the detection device; the industrial camera 29 is mounted in a rear center position within the detection device housing 27.
The detection device connecting plate 1 is also provided with a mounting top plate 20 and a mounting side plate 17, the rotating shaft 6 is driven to rotate by the servo motor 3, the mounting top plate 20 is provided with a strip-shaped through hole, the strip-shaped through hole is fixed on the detection device connecting plate 1 by a bolt, and the negative pressure regulating mechanism can move up and down under the action of an air cylinder through the strip-shaped through hole; the mounting side plates 17 are fixed on the connecting plate 1 of the detection device through bolts and are respectively provided with a round hole and a waist-shaped hole, the rotating shaft 6 is mounted between the two mounting side plates 17 through the round holes and the bearings, and the pneumatic nozzle 18 penetrates through the waist-shaped holes to align with the position of the sampling plate 7; the mounting bottom plate 14 is fixedly connected with the mounting side plate 17 through a reinforcing rib and a bolt; the servo motor 3 is provided with a speed reducer 4 and a motor seat 5, and is fixedly connected to the mounting side plate 17 through bolts; the sampling plate 7 is fixedly connected to the rotating shaft 6 through a screw and performs reciprocating rotation along with the rotating shaft 6; the rotating shaft 6 is connected with the speed reducer 4 through a coupler, and the rotating shaft 6 is driven by the servo motor 3 to perform rotary sampling movement; the linear guide rail is fixed on the detection device connecting plate 1 through a screw; the air cylinder I8 and the air cylinder II 16 are fixed on the connecting plate 1 of the detection device through air cylinder connecting pieces; the negative pressure regulating plate I9 and the negative pressure regulating plate II 19 are connected with the linear guide rail through sliding blocks.
The control system is provided with a control cabinet 32, the industrial personal computer and the PLC are arranged in the control cabinet 32, and the control cabinet 32 is fixedly connected under the mounting bottom plate 14 through threads; a touch screen is arranged on the shell of the control cabinet 32, and cotton sample weight real-time reading software, color level prediction model software, rolling working medium prediction model software, moisture regain prediction model software and impurity content prediction model software are installed on the industrial personal computer; and the quantitative sampling device, the weighing device and the quality detection device are controlled by the PLC to complete information acquisition and uploading of cotton sample weight, resistance and digital images, and uploaded data are processed by color level prediction model software, rolling quality prediction model software, moisture regain prediction model software and impurity content prediction model software.
Referring to fig. 1-8, as shown in the drawing, an on-line detecting system for quality of ginned cotton under quantitative condition comprises a detecting device and a control system, wherein the detecting device is provided with a quantitative sampling device, a weighing device and a quality detecting device, and the control system is provided with control elements such as an industrial personal computer, a PLC, a driver, a light source controller and the like.
The quantitative sampling device mainly comprises a detection device connecting plate 1, a mounting top plate 20, a mounting side plate 17, a mounting bottom plate 14, a servo motor 3, a speed reducer 4, a motor base 5, a sampling plate 7, a rotating shaft 6, a linear guide I2, a linear guide II 22, a cylinder I8, a cylinder II 16, a negative pressure regulating plate I9, a negative pressure regulating plate II 19 and a pneumatic nozzle 18. A cotton sample port is arranged on the connecting plate 1 of the detection device; the detection device connecting plate 1 is usually matched with the existing negative pressure cotton conveying pipeline, and when the detection device connecting plate is used, the cotton sample port is aligned with an opening on the negative pressure cotton conveying pipeline.
The linear guide rail I2 and the linear guide rail II 22 are fixed on the connecting plate of the detection device through screws; the air cylinder I8 and the air cylinder II 16 are fixed on the connecting plate 1 of the detection device through air cylinder connecting pieces; the negative pressure regulating plate I9 and the negative pressure regulating plate II 19 are respectively connected with the linear guide rail I2 and the linear guide rail II 22 through sliding blocks, and the two negative pressure regulating plates can respectively realize up-and-down movement positions under the action of the air cylinders.
The weighing device is positioned at the inner side of the negative pressure regulating plate and is close to the cotton sample port, the quantitative cotton collecting box 11 is positioned right above the weighing sensor 12 and is connected through a screw positioning and mounting hole; the upper end, the front end and the rear end of the quantitative cotton collecting box 11 are all open, and the open position of the front end is flush with a cotton sample opening.
The quality detection device is positioned behind the quantitative cotton collection box 11 and aligned with the quantitative cotton collection box 11, and the sliding table module 23 is arranged at the central position of the mounting bottom plate 14 through bolts; the movable guide rail 24 is positioned at one side of the sliding table module and is fixedly connected with the mounting bottom plate 14 through screws; the information detection device is connected with the sliding table module 23 and the movable guide rail 24 through a supporting plate 30, and is driven by the sliding table module 23 to move back and forth.
In the use, start the system earlier, cylinder II 16 opens, drives negative pressure regulating plate II 19 and reciprocates, and cotton sample mouth 33 opens, servo motor 3 corotation drives sampling board 7 to the inboard rotatory 60 of negative pressure cotton conveying pipeline and stop 3s, begins to take a sample work, after the sample is accomplished, servo motor 3 reversal drives sampling board 7 to the cotton conveying pipeline outside rotatory 80 of negative pressure, cylinder II 16 closes, drives negative pressure regulating plate II 19 and reciprocates, and cotton sample mouth closes, simultaneously pneumatic nozzle 18 begins to blow, blows the cotton on the sampling board 7 to quantitative cotton collection box 11, and the sample is accomplished.
After the cotton sample is taken to the quantitative cotton collecting box 11, the weighing device weighs the cotton sample in real time, the obtained accurate weight of the cotton sample is uploaded to the industrial personal computer, the sliding table module 23 moves forwards to drive the detection device to move forwards for pressing cotton, meanwhile, the electrode measuring plate 25 contacts the cotton to obtain cotton sample resistance information, the industrial camera 29 collects cotton sample compaction pictures, the collected data information is uploaded to the industrial personal computer, and the real-time detection of the quality of the ginned cotton sample is completed through pre-installed color level prediction model software, rolling quality prediction model software, moisture regain prediction model software and impurity content prediction model software;
after the real-time detection of the sample is completed, the sliding table module 23 moves backwards to drive the detection device to move backwards to release the cotton pressing force, the air cylinder I8 works, the cotton sample port is opened, and the cotton sample is sucked back to the cotton conveying pipeline by utilizing the negative pressure environment in the negative pressure cotton conveying pipeline to complete the cotton sample recovery work.
Example 2:
referring to the attached drawings, the application method of the ginned cotton quality online detection system under the quantitative condition as described in the embodiment 1 is characterized in that logic control is performed through a PLC (programmable logic controller) based on the ginned cotton quality online detection system, so that the processes of ginned cotton quantitative sampling, cotton sample detection and cotton sample recovery in a negative pressure conveying link are completed; mainly comprises the following steps:
(1) Preparing an on-line ginned cotton quality detection system under the quantitative condition, so that a cotton sample port 33 on a connecting plate 1 of the detection device is aligned with an opening on a negative pressure cotton conveying pipeline, and checking the initial position of equipment, wherein the servo motor 3 is positioned at a zero position, the air cylinders I8 and II 16 are positioned at the zero position, the sliding table module 23 is positioned at the zero position, and the pneumatic nozzle 18 is in a closed state;
(2) The system is started, the LED annular light source 28 is turned on, and the image acquisition environment is ensured to be bright; the industrial camera 29 is opened and establishes communication with the industrial personal computer to ensure that the image information is uploaded in time; the weighing sensor 12 is opened and is communicated with the industrial personal computer for reading the weight of the cotton sample in real time and uploading;
(3) The sampling device quantitatively samples: the system is started, the air cylinder II 16 is opened to drive the negative pressure regulating plate II 19 to move upwards, the cotton sample port 33 is opened, the servo motor 3 rotates positively to drive the sampling plate 7 to rotate 60 degrees towards the inner side direction of the negative pressure cotton conveying pipeline and stay for 3s, sampling work is started, after sampling is completed, the servo motor 3 rotates reversely to drive the sampling plate 7 to rotate 80 degrees towards the outer side direction of the negative pressure cotton conveying pipeline, the air cylinder II 16 is closed to drive the negative pressure regulating plate II 19 to move downwards, the cotton sample port 33 is closed, meanwhile, the pneumatic nozzle 18 starts to blow air, cotton on the sampling plate 7 is blown to the quantitative cotton collecting box 11 below, and sampling is completed;
(4) And (3) sample real-time detection: after the cotton sample is taken to the quantitative cotton collecting box 11, the weighing device acquires the accurate weight of the cotton sample in real time and uploads the accurate weight to the industrial personal computer, the sliding table module 23 moves forwards to drive the detection device to move forwards for compressing cotton, meanwhile, the electrode measuring plate 25 contacts the cotton to acquire cotton sample resistance information, the industrial camera 29 acquires a cotton sample compaction picture and uploads the acquired data information to the industrial personal computer, and the real-time detection of the quality of the ginned cotton sample is completed through pre-installed color level prediction model software, rolling quality prediction model software, moisture regain prediction model software and impurity content prediction model software;
(5) Cotton sample recovery: after the real-time detection of the cotton sample is completed, the sliding table module 23 moves backwards, the detection device is driven to move backwards to release the cotton pressing force, the air cylinder I8 works, the cotton sample port 33 is opened, the cotton sample is sucked back to the negative pressure cotton conveying pipeline by utilizing the negative pressure environment in the negative pressure cotton conveying pipeline, and the cotton sample recovery work is completed.
The application method of the online detection system is economical and practical, has higher detection efficiency and accuracy, and accurately acquires the color level, rolling quality, moisture regain and impurity content of ginned cotton in a negative pressure conveying link through the processes of system startup, quantitative sampling, automatic cotton scraping, cotton sample weighing, real-time detection, sample recovery and system shutdown, and provides accurate feedback information for cotton processing process parameter adjustment; the cotton quality integrated real-time detection in the processing process can be realized rapidly, and the technical problem that the ginned cotton detection precision in the processing process is affected by the sampling amount every time is solved.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and it is to be understood that the invention is not limited to the specific form disclosed, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. The on-line ginned cotton quality detection system under the quantitative condition comprises a detection device and a control system, wherein the detection device mainly comprises a quantitative sampling device, a weighing device and a ginned cotton quality detection device, and the control system mainly comprises an industrial personal computer and a PLC;
the quantitative sampling device mainly comprises a detection device connecting plate, an installation bottom plate, a sampling plate, a rotating shaft, a linear guide rail, a negative pressure regulating mechanism and a pneumatic nozzle; a cotton sample port is arranged on the connecting plate of the detection device;
the linear guide rail is fixed on a connecting plate of the detection device, and the negative pressure regulating mechanism structurally comprises a cylinder I, a cylinder II, a negative pressure regulating plate I and a negative pressure regulating plate II, wherein the negative pressure regulating plate I and the negative pressure regulating plate II are covered on the cotton sample port and can move up and down under the action of the cylinder I and the cylinder II respectively;
the sampling plate is in a comb-shaped plate structure, a plurality of strip-shaped cotton carding openings are arranged on the comb-shaped plate at intervals, and the rotating shaft is connected with the sampling plate and can do reciprocating rotary motion along with the rotating shaft; the pneumatic nozzles are arranged on two sides of the sampling plate, and the openings are aligned to the position of the sampling plate;
the weighing device is close to the cotton sample port and mainly structurally comprises a quantitative cotton collecting box, a weighing sensor and a cushion block; the weighing sensor is arranged on the cushion block, the cushion block is fixed on the mounting bottom plate, the quantitative cotton collecting box is arranged right above the weighing sensor, the upper end, the front end and the rear end of the quantitative cotton collecting box are all open, and the open position of the front end is flush with the cotton sample opening;
the quality detection device is positioned behind the quantitative cotton collecting box and aligned with the quantitative cotton collecting box, and the structure of the quality detection device mainly comprises a sliding table module, a movable guide rail and an information acquisition device; the sliding table module is arranged at the center of the mounting bottom plate; the information detection module is connected with the movable guide rail and driven by the sliding table module to move back and forth; the information acquisition device is provided with a detection device shell, and a detection electrode plate, optical transparent glass, an LED annular light source and an industrial camera are arranged in the detection device shell; the optical transparent glass is fixed at the front end of the detection device shell; the electrode measuring plates are arranged on two sides of the transparent optical glass; the LED annular light source is arranged at the central position in the shell of the detection device; the industrial camera is mounted in a rear end center position within the detection device housing.
2. The on-line quantitative ginned cotton quality detection system according to claim 1, wherein: the detection device connecting plate is also provided with a mounting top plate and a mounting side plate, the rotating shaft is driven to rotate by a servo motor, the mounting top plate is provided with a strip-shaped through hole, the strip-shaped through hole is fixed on the detection device connecting plate by a bolt, and the negative pressure regulating mechanism can move up and down under the action of an air cylinder through the strip-shaped through hole; the installation side plates are fixed on the detection device connecting plate through bolts and are respectively provided with a round hole and a waist-shaped hole, the rotating shaft is installed between the two installation side plates through the round holes and the bearings, and the pneumatic nozzle penetrates through the waist-shaped holes to align to the position of the sampling plate; the mounting bottom plate is fixedly connected with the mounting side plate through a reinforcing rib and a bolt; the servo motor is provided with a speed reducer and a motor seat, and is fixedly connected to the mounting side plate through bolts; the sampling plate is fixedly connected to the rotating shaft through a screw and performs reciprocating rotation along with the rotating shaft; the rotating shaft is connected with the speed reducer through a coupler, and is driven by the servo motor to perform rotary sampling motion; the linear guide rail is fixed on the connecting plate of the detection device through a screw; the cylinder I and the cylinder II are fixed on the connecting plate of the detection device through a cylinder connecting piece; the negative pressure regulating plate I and the negative pressure regulating plate II are connected with the linear guide rail through sliding blocks.
3. The on-line quantitative ginned cotton quality detection system according to claim 1 or 2, wherein: the control system is provided with a control cabinet, the industrial personal computer and the PLC are installed in the control cabinet, and the control cabinet is fixedly connected under the installation bottom plate through threads; the control cabinet comprises a control cabinet shell, a cotton sample weight real-time reading software, a color level prediction model software, a rolling working medium prediction model software, a moisture regain prediction model software and a impurity content prediction model software, wherein a touch screen is arranged on the control cabinet shell; and the quantitative sampling device, the weighing device and the quality detection device are controlled by the PLC to complete information acquisition and uploading of cotton sample weight, resistance and digital images, and uploaded data are processed by color level prediction model software, rolling quality prediction model software, moisture regain prediction model software and impurity content prediction model software.
4. An application method of the on-line ginned cotton quality detection system under the quantitative condition as claimed in claim 1 or 2, which is characterized in that based on the on-line ginned cotton quality detection system, logic control is performed through a PLC, and the processes of ginned cotton quantitative sampling, cotton sample detection and cotton sample recovery in a negative pressure conveying link are completed, and mainly comprises the following steps:
(1) Preparing an on-line ginned cotton quality detection system under the quantitative condition, so that a cotton sample port on a connecting plate of the detection device is aligned with an opening on a negative pressure cotton conveying pipeline, and checking the initial position of equipment, wherein the servo motor is positioned at a zero position, the air cylinders I and II are positioned at the zero position, the sliding table module is positioned at the zero position, and the pneumatic nozzle is in a closed state;
(2) The system is started, the LED annular light source is turned on, and the brightness of an image acquisition environment is ensured; the industrial camera is opened and is communicated with the industrial personal computer, so that image information is guaranteed to be uploaded in time; the weighing sensor is opened and is communicated with the industrial personal computer, and is used for reading the weight of the cotton sample in real time and uploading the weight;
(3) The sampling device quantitatively samples: the system is started, the air cylinder II is opened to drive the negative pressure regulating plate II to move upwards, the cotton sample port is opened, the servo motor is rotated positively to drive the sampling plate to rotate for 60 degrees to stay for 3 seconds in the inner side direction of the negative pressure cotton conveying pipeline, the servo motor is rotated reversely to drive the sampling plate to rotate for 80 degrees in the outer side direction of the negative pressure cotton conveying pipeline after sampling is completed, the air cylinder II is closed to drive the negative pressure regulating plate II to move downwards, the cotton sample port is closed, meanwhile, the pneumatic nozzle starts to blow air, cotton on the sampling plate is blown to a quantitative cotton collecting box below, and sampling is finished;
(4) And (3) sample real-time detection: after the cotton sample is taken to a quantitative cotton collecting box, the weighing device acquires the accurate weight of the cotton sample in real time and uploads the accurate weight to an industrial personal computer, the sliding table module moves forwards to drive the detection device to move forwards for pressing cotton, meanwhile, the electrode plate is tested to contact the cotton to acquire cotton sample resistance information, the industrial camera acquires a cotton sample compaction picture and uploads the acquired data information to the industrial personal computer, and the real-time detection of the quality of the ginned cotton sample is completed through pre-installed color level prediction model software, rolling quality prediction model software, moisture regain prediction model software and impurity content prediction model software;
(5) Cotton sample recovery: after the real-time detection of the cotton sample is finished, the sliding table module moves backwards to drive the detection device to move backwards to release the cotton pressing force, the air cylinder I works, the cotton sample port is opened, the cotton sample is sucked back to the negative pressure cotton conveying pipeline by utilizing the negative pressure environment in the negative pressure cotton conveying pipeline, and the cotton sample recovery work is completed.
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