CN114058170A - High-performance full-biodegradable agricultural mulching film - Google Patents

High-performance full-biodegradable agricultural mulching film Download PDF

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CN114058170A
CN114058170A CN202111590015.4A CN202111590015A CN114058170A CN 114058170 A CN114058170 A CN 114058170A CN 202111590015 A CN202111590015 A CN 202111590015A CN 114058170 A CN114058170 A CN 114058170A
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王洪琼
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Guangdong Huifa Plastic Industry Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
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    • G06—COMPUTING; CALCULATING OR COUNTING
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    • C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2467/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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Abstract

The invention discloses a high-performance fully biodegradable agricultural mulching film, which has the advantages that the conventional mulching film is relatively low in degradability and slow in degradation process, the biodegradation is more and more emphasized with the enhancement of environmental protection consciousness, the biodegradation means that certain substances are decomposed by certain living organisms under the action of the living organisms, the obtained decomposed substances are generally carbon dioxide and water, pollution-free substances are not generated, the fully biodegradable agricultural mulching film can be controlled to degrade in a plant growth cycle, and the environmental protection is very strong. Meanwhile, in the production process of the full-biodegradable mulching film, the cooling step in the film blowing machine is regulated and controlled by monitoring the state of the film in real time, the product problem caused by the fact that the air quantity of an air cooler is not suitable in the production process of the film is solved, the quality of the finished film is improved, the yield of the full-biodegradable agricultural mulching film is greatly improved, and the full-biodegradable mulching film is made of degradable materials and has great significance for energy-saving, environment-friendly and sustainable agricultural production.

Description

High-performance full-biodegradable agricultural mulching film
Technical Field
The disclosure belongs to the field of energy conservation, environmental protection, data acquisition and intelligent manufacturing, and particularly relates to a high-performance full-biodegradable agricultural mulching film.
Background
The existing mulching film generally has relatively low degradability, because the degradation process is relatively slow originally, and the biodegradation is more and more emphasized with the deep development of science and technology, so-called biodegradation means that under the action of a certain living organism, certain substances are decomposed by the existing mulching film, and the obtained decomposed substances are generally carbon dioxide and water finally and are substances which do not cause pollution. The fact that the residual mulching film in the soil is generally degraded by microorganisms in the soil shows that the degradation effect is different for different substances and generally shows in terms of speed, the degradation speed is relatively slow for the residual mulching film, and in the degradation process, some intermediate products can be generated and become larger killers of environmental pollution in some specific environments. The application of the mulching film is gradually popularized and favored in the agricultural production, and the full-biodegradable mulching film is advocated most because the full-biodegradable mulching film is a degradable mulching film and does not generate a polluted intermediate product, can be controlled to degrade in the plant growth period, and is very environment-friendly. In the production process of the full-biodegradable mulching film, compared with the traditional mulching film, the difficulty is higher due to the difference between the physical properties of the constructed degradable substances and the traditional production material Polyethylene (PE), wherein the mechanical property, the processing property, the thermal property and the degradation period of the mulching film are influenced to a certain degree by the micro-folds of the full-biodegradable mulching film.
Disclosure of Invention
The invention aims to provide a high-performance fully biodegradable agricultural mulching film, which solves one or more technical problems in the prior art and at least provides a beneficial selection or creation condition.
In order to achieve the purpose, the high-performance full-biodegradable agricultural mulching film is characterized by comprising the following materials in parts by weight:
15-40 parts of polyglycolide, 60-85 parts of polypropylene carbonate, 0.6-0.85 part of maleic anhydride, 0.3-0.8 part of phthalic anhydride, 0.75-2 parts of plasticizer, 0.25-5 parts of compatilizer ADR, 10100.1 parts of antioxidant, 1680.2 parts of antioxidant, UV 3280.2 parts and 0.2 part of white oil; the preparation method of the mulching film comprises the following steps:
s100, adding polyglycolide, phthalic anhydride and a plasticizer into a parallel double-screw extruder for melting and blending, air cooling and granulating to obtain polyglycolide master batches;
s200, adding the polypropylene carbonate and maleic anhydride into a parallel double-screw extruder, melting, blending, air-cooling and granulating to obtain polypropylene carbonate master batches;
s300, uniformly mixing polypropylene carbonate master batches, polyglycolide master batches, a compatilizer, an antioxidant 1010, an antioxidant 168, UV328 and white oil, adding the mixture into an extruder, melting, blending, air-cooling and granulating to obtain master batches for film blowing;
s400, injecting master batches for film blowing into a film blowing machine and controlling the film blowing machine to blow the film to form a film tube;
s500, folding the film tube into a double-folded film through a traction roller, monitoring the double-folded film in real time and controlling a film blowing machine to blow the film;
s600, winding the double-folded film to obtain a finished product.
Further, in step S500, the method for monitoring the double-folded film in real time and controlling the film blowing of the film blowing machine includes the following steps:
s510, shooting the double-folded film through an industrial CCD camera at intervals of time T to obtain double-folded film images;
s520, graying the double-folded film image and identifying the film to obtain a film gray image;
s530, calculating a micro-wrinkle level by using the membrane gray scale map;
s540, constructing a micro-wrinkle estimation model according to the micro-wrinkle levels from the current moment to the previous N moments;
s550, obtaining a micro-wrinkle magnetic chain through a micro-wrinkle estimation model;
and S560, regulating and controlling the air volume and direction of an air cooler of the film blowing machine according to the micro-wrinkle magnetic chain.
Further, in step S520, the method for graying the image of the double-folded film and identifying the film to obtain the film grayscale map is: graying the double-folded film image by a weighted average method to form an initial gray scale map, wherein the mathematical expression of the weighted average method is as follows:
Gray＝1/3Blue+1/3Green+1/3Red；
wherein Gray represents the Gray value of a pixel, Blue represents the value of the Blue channel of the pixel, Green represents the value of the Green channel of the pixel, and Red represents the value of the Red channel of the pixel.
Further, in step S520, a canny operator is used as an edge detection operator to perform edge detection on the primary gray scale map, an edge curve is obtained through the edge detection, each edge curve divides the primary gray scale map into a plurality of image regions, the image region with the largest area is selected as a double-folded film region, and an image of the double-folded film region of the primary gray scale map is captured as a film gray scale map.
Further, in step S530, the method for calculating the micro-wrinkle level using the film gray scale map is: establishing a coordinate system by taking the pixel at the lower left corner of the film gray-scale image as an origin, taking the horizontal axis as an X axis and taking the vertical axis as a Y axis, and using (X) asφ，yφ) Representing the X-axis coordinate on the film grey scale map as XφY axis coordinate of YφThe pixel point of (2); the pixel coordinate at the lower left corner of the film gray scale map is (1, 1); by xmaxThe number of pixels in the X-axis direction of the film gray scale diagram is represented by ymaxThe number of pixels in the Y-axis direction of the film gray scale image is represented; setting an impact radius r in the interval [10, 20 ]]An integer value within, the unit of the impingement radius r being a pixel; setting scope WZone, wherein the scope WZone contains X-axis coordinate in the film gray scale map in the range [ r +1, Xmax-r]Inner and Y-axis coordinates in the range [ r +1, Ymax-r]Area of coordinates within, where xmax> 2r +1 and ymaxIs more than 2r + 1; calculating the total quantity of pixels SoP in the scope WZone, wherein SoP is (x)max-2r)×(ymax-2 r); setting variables x and y, and setting initial values of x and y to be 1;
s401, calculating a texture impact value for the coordinates in the scope WZone, wherein the step of calculating the texture impact value is as follows:
a1, setting a variable x to make the value of x r + 1;
a2, when x is less than or equal to xmax-r, jump to step a 3; when x > xmax-r, jump to step a 5;
a3, setting a variable y to make the value of y be r + 1;
a4, when y is less than or equal to ymaxR, calculating a texture impact value (calculating a corresponding texture impact value for each pixel to be used for constructing the micro-wrinkle level later), updating the value of x to be x +1, and jumping to the step A1;
the method for calculating the texture impact value comprises the following steps: obtaining gray values of coordinates with an X-axis coordinate in a range [ X-r, X + r ] and a Y-axis coordinate in a range [ Y-r, Y + r ], and generating a matrix M of DxD, wherein D is 2r + 1; setting a variable i1 to make the value of i1 be 1;
a401, when i1 is not more than D, obtaining a horizontal sub-impact sequence ListX, wherein the horizontal sub-impact sequence is an element of the i1 th row of M; jumping to the step A402 by taking the horizontal sub-impact sequence ListX as an input object, and taking the value returned from the step A402 as a calculated horizontal sub-impact value xWavet; obtaining a vertical sub-impact sequence ListY, wherein the vertical sub-impact sequence is the element of the i1 th column of M; jumping to the step A402 by taking the vertical sub-impact sequence ListY as an input object, and calculating a vertical sub-impact value yWavet by using the value returned from the step A402; calculating the shock value component NDoti1：
Figure BDA0003429538830000031
Increasing the value of i1 by 1, and jumping to the step A401; when i1 > D, calculating the texture impact value Pound,
Figure BDA0003429538830000032
wherein NDoti3Refers to the i3 th impulse value component, Pixi4Represents the i4 th element in M, Epix represents the average value of the elements in M, i3 is the value range [1, D ]]An accumulated variable of (d);
a402, obtaining an input object as an input sequence List, where the List is [ num [ ]1，num2，…，numD]Wherein num1，num2And numDRespectively represent the 1 st, 2 nd and D th elements of the input sequence; setting a current mark and marking the current mark as None; setting a history mark hist, and marking the history mark hist as None; setting a sub-impact value wave, and enabling the sub-impact value wave to be 0; setting a sequence variable i2 to make the value of i2 be 1, and using List (i2) to describe the i2 th element in the List; skipping to the step A403 to calculate the sub-impact value wave; returning the sub shock value wave returned from step a403 to a406 to step a 401;
a403, when i2 < D, if List (i2) > List (i2+1), updating mark of mark to DOWN; if List (i2) < List (i2+1), update mark of mark as UP; if the List (i2) is List (i2+1), updating the mark of mark with mark 'hist'; after the size relationship between the List (i2) and the List (i2+1) is judged, the step A404 is skipped; if i2 is more than or equal to D, obtaining the sub-impact value wave and returning to the step A402;
a404, if mark is hist or mark is None, updating the value of i2 to i2+1, and jumping to a step a 403; if mark ≠ hist and mark ≠ None, jump to step A405;
a405, if hist is None, updating the mark of hist marked as mark, updating the value of i2 to be i2+1, and jumping to a step a 403; if hist ≠ None, jumping to step A406; (Note: Hist varies at A405);
a406, if mark ≠ hist, the value of update wave is wave +1, the mark of update hist marked as mark, the value of update i2 is i2+1, and the step A403 is skipped;
a5, if y +1 ≦ ymax-r, setting the value of x to 1, updating the value of y to y +1, jumping to step a 1; if y +1 > ymax-r, ending texture impact value calculation; the mean value of the texture impact in the domain, Epound, is calculated,
Figure BDA0003429538830000041
wherein Poundi5Represents the i5 th texture impact value in the WZone; dividing the scope WZone into K sub scopes along the longitudinal direction and perpendicular to the X axis, and calculating the micro-fold coefficients WFactor of the sub scopes from left to rightkWherein K is in the range [1, K ]]Internal positive integer, micro-corrugation coefficient WFactorkK × orv/SoP; wherein orv represents the number of elements in the kth sub-scope whose texture impact value is greater than the texture impact mean value Epound; constructing a sequence as the level of micro-folds Feat [ WFactor ]1、WFactor2、…、WFactorK]。
Further, in step S540, the method for constructing the micro-wrinkle estimation model according to the micro-wrinkle levels from the current time to the previous N times is: micro-wrinkle estimation model ∑ [ [ Feat [ ]0，Feat1，…，FeatN]Wherein Feat0Indicating the level of micro-folds, Feat, at the current momentNRepresenting the level of the micro-wrinkles at the first N moments, the micro-wrinkle estimation model sigma is a K-dimensional data table with the length of N + 1.
Further, in step S540, the method for obtaining the micro-wrinkle magnetic chain through the micro-wrinkle estimation model is: setting a complexity climbing factor GUp, wherein the value of the complexity climbing factor GUp is 0; setting a complexity drop factor GDown, and enabling the value of the complexity drop factor GDown to be 0; setting a complexity rise DGUp to a value of 0; setting a complexity drop DGDown, and setting the value of the complexity drop DGDown to be 0; using sigma (alpha, beta) to represent the value of alpha row and beta column in sigma; setting a variable j, and enabling the value of the j to be 1;
s541, when j is less than or equal to K, setting a variable i, enabling the value of i to be 1, jumping to the step S542, and when j is greater than K, obtaining a micro-wrinkle magnetic chain Mag [ Mag ]1，Mag2，...，MagK]Wherein MagKRepresents the Kth magnetic force pair MagKThe magnetic force pair is a binary group consisting of a pair of values, obtained by step S542;
s542, when i is less than or equal to N, jumping to the step S543; when i is more than N, calculating to obtain a magnetic force pair Magj：
Figure BDA0003429538830000051
Wherein, if the value of DGown is 0, DGDown/GDown is 0, and if the value of DGUp is 0, DGUp and GUp are 0; updating the value of j to be j +1, and jumping to the step S541;
s543, if j-1 is less than 1, presetting that the value of sigma (i +1, j-1) is equal to sigma (i +1, j), and if not, continuing; if j +1 is larger than K, presetting the value of sigma (i +1, j +1) to be equal to sigma (i +1, j), otherwise continuing (for preventing elements described by j-1 column or j +1 column in matrix sigma applied in subsequent operation from not existing, presetting the value of the element); if Σ (i, j) > [0.25 Σ (i +1, j-1) +0.5 Σ (i +1, j) +0.25 Σ (i +1, j +1) ], go to step S544; if Σ (i, j) < [0.25 Σ (i +1, j-1) +0.5 Σ (i +1, j) +0.25 Σ (i +1, j +1) ], jumping to step S545; if ∑ (i, j) [0.25 ∑ (i +1, j-1) +0.5 ∑ (i +1, j) +0.25 ∑ (i +1, j +1) ], updating the value of i to i +1, and jumping to step S542;
s544, updating the value of GDown to GDown +1, updating the value of DGDown to DGDown + ∑ 0.25 (i, j) -0.25 Σ (i +1, j-1) -0.5 Σ (i +1, j) -0.25 Σ (i +1, j +1), updating the value of i to i +1, and jumping to S542;
s545, the value of the updated GUp is GUp +1, the value of the updated DGUp is DGUp + ∑ (i, j) -0.25 Σ (i +1, j-1) -0.5 Σ (i +1, j) -0.25 Σ (i +1, j +1), the value of the updated i is i +1, and the step S542 is skipped to;
further, in step S550, the method for regulating and controlling the air volume and the direction of the air cooler according to the level of the micro-wrinkles is as follows: obtaining the average value of TW micro-wrinkle magnetic chains Mag before the current time as a reference micro-wrinkle magnetic chain WMag, calculating the cosine similarity PRN between the Mag and the WMag obtained at the current time through the cosine similarity, and executing a fine adjustment scheme by the upper computer according to the cosine similarity, wherein the solution is as follows:
when the cosine similarity range is [ -1, -0.5], improving the air volume of the current air cooler of the film blowing machine by 20%;
when the cosine similarity range is (-0.5, 0%), the air quantity of the current air cooler of the film blowing machine is increased by 10%;
when the cosine similarity range is (0, 0.5), reducing the air quantity of the current air cooler of the film blowing machine by 10 percent;
and when the cosine similarity range is (0.5.1), reducing the current air volume of the air cooler of the film blowing machine by 20%.
Preferably, the value of WT is taken to be an integer value within [100,500 ].
The invention also provides an equipment system for producing the high-performance fully biodegradable agricultural mulching film, which comprises the following components in percentage by weight: a processor, a memory and a computer program stored in the memory and operable on the processor, the processor implementing the steps of producing the high-performance fully biodegradable agricultural mulch film when executing the computer program, the equipment system for producing the high-performance fully biodegradable agricultural mulch film can be operated in computing equipment such as desktop computers, notebooks, palmtops and cloud data centers, the operable system can include, but is not limited to, the processor, the memory and a server cluster, the processor executing the computer program and operating in the following units of the system:
the data acquisition unit is used for graying the images of the double-folded film at intervals of time T and identifying the film to obtain a film gray image;
a level test unit for calculating a micro-wrinkle level using the film gray map;
the model building unit is used for building a micro-wrinkle estimation model according to the micro-wrinkle levels from the current moment to the previous N moments;
the data transmission unit is used for transmitting the data to be transmitted to the data buffer pool;
the characteristic extraction unit is used for obtaining a micro-wrinkle magnetic chain through a micro-wrinkle estimation model;
the storage buffer unit is used for storing the folded magnetic chains in various forms;
and the fine adjustment control unit is used for adjusting and controlling the air volume and the direction of the air cooler according to the level of the micro-folds.
The beneficial effect of this disclosure does: in the production process of the full-biodegradable mulching film, compared with the traditional mulching film, the production difficulty is higher due to the difference between the physical properties of the constructed degradable substances and the traditional production material Polyethylene (PE), wherein the mechanical property, the processing property, the thermal property and the degradation period of the mulching film are influenced to a certain degree by the micro-folds of the full-biodegradable mulching film, and finally the performance of the full-biodegradable mulching film is difficult to achieve the effect of the traditional mulching film. The invention provides a high-performance full-biodegradable agricultural mulching film, which solves the product problem caused by unsuitable air volume of an air cooler in the production process of the film by monitoring the state of the film in real time and regulating and controlling the cooling step in a film blowing machine in the production process, improves the quality of a finished film, greatly reduces the risk of film deterioration, and has great significance for energy-saving, environment-friendly and sustainable agricultural production due to the use of degradable materials.
Drawings
The above and other features of the present invention will become more apparent by describing in detail embodiments thereof with reference to the attached drawings, it being understood that the drawings in the following description are merely exemplary of the present disclosure and that other drawings may be derived therefrom by those skilled in the art without the inventive faculty, wherein:
FIG. 1 shows a method for preparing a high-performance fully biodegradable agricultural mulching film;
FIG. 2 illustrates a method for real-time monitoring of a double-folded film and controlling the film blowing of a film blowing machine;
fig. 3 is a schematic structural diagram of a film blowing machine.
Detailed Description
The conception, specific structure and technical effects of the present disclosure will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, aspects and effects of the present disclosure. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Fig. 1 is a flow chart of a preparation method of a high-performance fully biodegradable agricultural mulching film, and an embodiment according to the invention is described below with reference to fig. 1, and comprises the following steps:
the invention aims to provide a high-performance fully biodegradable agricultural mulching film, which solves one or more technical problems in the prior art and at least provides a beneficial selection or creation condition.
In order to achieve the purpose, the high-performance full-biodegradable agricultural mulching film is characterized by comprising the following materials in parts by weight:
15-40 parts of polyglycolide, 60-85 parts of polypropylene carbonate, 0.6-0.85 part of maleic anhydride, 0.3-0.8 part of phthalic anhydride, 0.75-2 parts of plasticizer, 0.25-5 parts of compatilizer ADR, 10100.1 parts of antioxidant, 1680.2 parts of antioxidant, UV 3280.2 parts and 0.2 part of white oil; the preparation method of the mulching film comprises the following steps:
s100, adding polyglycolide, phthalic anhydride and a plasticizer into a parallel double-screw extruder for melting and blending, air cooling and granulating to obtain polyglycolide master batches;
s200, adding the polypropylene carbonate and maleic anhydride into a parallel double-screw extruder, melting, blending, air-cooling and granulating to obtain polypropylene carbonate master batches;
s300, uniformly mixing polypropylene carbonate master batches, polyglycolide master batches, a compatilizer, an antioxidant 1010, an antioxidant 168, UV328 and white oil, adding the mixture into an extruder, melting, blending, air-cooling and granulating to obtain master batches for film blowing;
s400, injecting master batches for film blowing into a film blowing machine and controlling the film blowing machine to blow the film to form a film tube;
s500, folding the film tube into a double-folded film through a traction roller, monitoring the double-folded film in real time and controlling a film blowing machine to blow the film;
s600, winding the double-folded film to obtain a finished product.
Fig. 2 shows a method for monitoring a double-folded film in real time and controlling a film blowing method of a film blowing machine, fig. 3 shows a schematic structural diagram of the film blowing machine, and a sub-embodiment according to the present invention is described below with reference to fig. 2 and 3.
Further, in step S500, the method for monitoring the double-folded film in real time and controlling the film blowing of the film blowing machine includes the following steps:
s510, shooting the double-folded film through an industrial CCD camera at intervals of time T to obtain double-folded film images;
s520, graying the double-folded film image and identifying the film to obtain a film gray image;
s530, calculating a micro-wrinkle level by using the membrane gray scale map;
s540, constructing a micro-wrinkle estimation model according to the micro-wrinkle levels from the current moment to the previous N moments;
s550, obtaining a micro-wrinkle magnetic chain through a micro-wrinkle estimation model;
and S560, regulating and controlling the air volume and direction of an air cooler of the film blowing machine according to the micro-wrinkle magnetic chain.
Further, in step S520, the method for graying the image of the double-folded film and identifying the film to obtain the film grayscale map is: graying the double-folded film image by a weighted average method to form an initial gray scale map, wherein the mathematical expression of the weighted average method is as follows:
Gray＝1/3Blue+1/3Green+1/3Red；
wherein Gray represents the Gray value of a pixel, Blue represents the value of the Blue channel of the pixel, Green represents the value of the Green channel of the pixel, and Red represents the value of the Red channel of the pixel.
Further, in step S520, a canny operator is used as an edge detection operator to perform edge detection on the primary gray scale map, an edge curve is obtained through the edge detection, each edge curve divides the primary gray scale map into a plurality of image regions, the image region with the largest area is selected as a double-folded film region, and an image of the double-folded film region of the primary gray scale map is captured as a film gray scale map.
Further, in step S530, the method for calculating the micro-wrinkle level using the film gray scale map is: establishing a coordinate system by taking the pixel at the lower left corner of the film gray-scale image as an origin and taking the horizontal axis as the horizontal axisX-axis with the vertical axis as the Y-axis by (X)φ，yφ) Representing the X-axis coordinate on the film grey scale map as XφY axis coordinate of YφThe pixel point of (2); the pixel coordinate at the lower left corner of the film gray scale map is (1, 1); by xmaxThe number of pixels in the X-axis direction of the film gray scale diagram is represented by ymaxThe number of pixels in the Y-axis direction of the film gray scale image is represented; setting an impact radius r in the interval [10, 20 ]]An integer value within, the unit of the impingement radius r being a pixel; setting scope WZone, wherein the scope WZone contains X-axis coordinate in the film gray scale map in the range [ r +1, Xmax-r]Inner and Y-axis coordinates in the range [ r +1, Ymax-r]Area of coordinates within, where xmax> 2r +1 and ymaxIs more than 2r + 1; calculating the total quantity of pixels SoP in the scope WZone, wherein SoP is (x)max-2r)×(ymax-2 r); setting variables x and y, and setting initial values of x and y to be 1;
s401, calculating a texture impact value for the coordinates in the scope WZone, wherein the step of calculating the texture impact value is as follows:
a1, setting a variable x to make the value of x r + 1;
a2, when x is less than or equal to xmax-r, jump to step a 3; when x > xmax-r, jump to step a 5;
a3, setting a variable y to make the value of y be r + 1;
a4, when y is less than or equal to ymaxR, calculating a texture impact value, updating the value of x to be x +1, and jumping to the step A1;
the method for calculating the texture impact value comprises the following steps: obtaining gray values of coordinates with an X-axis coordinate in a range [ X-r, X + r ] and a Y-axis coordinate in a range [ Y-r, Y + r ], and generating a matrix M of DxD, wherein D is 2r + 1; setting a variable i1 to make the value of i1 be 1;
a401, when i1 is not more than D, obtaining a horizontal sub-impact sequence ListX, wherein the horizontal sub-impact sequence is an element of the i1 th row of M; jumping to the step A402 by taking the horizontal sub-impact sequence ListX as an input object, and taking the value returned from the step A402 as a calculated horizontal sub-impact value xWavet; obtaining a vertical sub-impact sequence ListY, wherein the vertical sub-impact sequence is the element of the i1 th column of M; in the longitudinal sub-impact sequence LisTY is taken as an input object, the step A402 is skipped, and the value returned from the step A402 is the calculated longitudinal sub-impact value yWavet; calculating the shock value component NDoti1：
Figure BDA0003429538830000081
Increasing the value of i1 by 1, and jumping to the step A401; when i1 > D, calculating the texture impact value Pound,
Figure BDA0003429538830000082
wherein NDoti3Refers to the i3 th impulse value component, Pixi4Represents the i4 th element in M, and Epix represents the average value of the elements in M;
a402, obtaining an input object as an input sequence List, where the List is [ num [ ]1，num2，…，numD]Wherein num1，num2And numDRespectively represent the 1 st, 2 nd and D th elements of the input sequence; setting a current mark and marking the current mark as None; setting a history mark hist, and marking the history mark hist as None; setting a sub-impact value wave, and enabling the sub-impact value wave to be 0; setting a sequence variable i2 to make the value of i2 be 1, and using List (i2) to describe the i2 th element in the List; skipping to the step A403 to calculate the sub-impact value wave; returning the sub shock value wave returned from step a403 to a406 to step a 401;
a403, when i2 < D, if List (i2) > List (i2+1), updating mark of mark to DOWN; if List (i2) < List (i2+1), update mark of mark as UP; if the List (i2) is List (i2+1), updating the mark of mark with mark 'hist'; after the size relationship between the List (i2) and the List (i2+1) is judged, the step A404 is skipped; if i2 is more than or equal to D, obtaining the sub-impact value wave and returning to the step A402;
a404, if mark is hist or mark is None, updating the value of i2 to i2+1, and jumping to a step a 403; if mark ≠ hist and mark ≠ None, jump to step A405;
a405, if hist is None, updating the mark of hist marked as mark, updating the value of i2 to be i2+1, and jumping to a step a 403; if hist ≠ None, jumping to step A406;
a406, if mark ≠ hist, the value of update wave is wave +1, the mark of update hist marked as mark, the value of update i2 is i2+1, and the step A403 is skipped;
a5, if y +1 ≦ ymax-r, setting the value of x to 1, updating the value of y to y +1, jumping to step a 1; if y +1 > ymax-r, ending texture impact value calculation; the mean value of the texture impact in the domain, Epound, is calculated,
Figure BDA0003429538830000091
wherein Poundi5Represents the i5 th texture impact value in the WZone; dividing the scope WZone into K sub scopes along the longitudinal direction and perpendicular to the X axis, and calculating the micro-fold coefficients WFactor of the sub scopes from left to rightkWherein K is in the range [1, K ]]Internal positive integer, micro-corrugation coefficient WFactorkK × orv/SoP; wherein orv represents the number of elements in the kth sub-scope whose texture impact value is greater than the texture impact mean value Epound; constructing a sequence as the level of micro-folds Feat [ WFactor ]1、WFactor2、…、WFactorK]。
Further, in step S540, the method for constructing the micro-wrinkle estimation model according to the micro-wrinkle levels from the current time to the previous N times is: micro-wrinkle estimation model ∑ [ [ Feat [ ]0，Feat1，…，FeatN]Wherein Feat0Indicating the level of micro-folds, Feat, at the current momentNRepresenting the level of the micro-wrinkles at the first N moments, the micro-wrinkle estimation model sigma is a K-dimensional data table with the length of N + 1.
Further, in step S540, the method for obtaining the micro-wrinkle magnetic chain through the micro-wrinkle estimation model is: setting a complexity climbing factor GUp, wherein the value of the complexity climbing factor GUp is 0; setting a complexity drop factor GDown, and enabling the value of the complexity drop factor GDown to be 0; setting a complexity rise DGUp to a value of 0; setting a complexity drop DGDown, and setting the value of the complexity drop DGDown to be 0; using sigma (alpha, beta) to represent the value of alpha row and beta column in sigma; setting a variable j, and enabling the value of the j to be 1;
s541, when j is less than or equal to K, setting a variable i, enabling the value of i to be 1, jumping to the step S542, and when j is greater than K, obtaining a micro-wrinkle magnetic chain Mag [ Mag ]1，Mag2，...，MagK]Wherein MagKRepresents the Kth magnetic force pair MagKThe magnetic force pair is a binary group consisting of a pair of values, obtained by step S542;
s542, when i is less than or equal to N, jumping to the step S543; when i is more than N, calculating to obtain a magnetic force pair Magj：
Figure BDA0003429538830000101
Wherein, if the value of DGown is 0, DGDown/GDown is 0, and if the value of DGUp is 0, DGUp and GUp are 0; updating the value of j to be j +1, and jumping to the step S541;
s543, if j-1 is less than 1, presetting that the value of sigma (i +1, j-1) is equal to sigma (i +1, j), and if not, continuing; if j +1 is larger than K, presetting the value of sigma (i +1, j +1) to be equal to sigma (i +1, j), otherwise continuing (for preventing elements described by j-1 column or j +1 column in matrix sigma applied in subsequent operation from not existing, presetting the value of the element); if Σ (i, j) > [0.25 Σ (i +1, j-1) +0.5 Σ (i +1, j) +0.25 Σ (i +1, j +1) ], go to step S544; if Σ (i, j) < [0.25 Σ (i +1, j-1) +0.5 Σ (i +1, j) +0.25 Σ (i +1, j +1) ], jumping to step S545; if ∑ (i, j) [0.25 ∑ (i +1, j-1) +0.5 ∑ (i +1, j) +0.25 ∑ (i +1, j +1) ], updating the value of i to i +1, and jumping to step S542;
s544, updating the value of GDown to GDown +1, updating the value of DGDown to DGDown + ∑ 0.25 (i, j) -0.25 Σ (i +1, j-1) -0.5 Σ (i +1, j) -0.25 Σ (i +1, j +1), updating the value of i to i +1, and jumping to S542;
s545, the value of the updated GUp is GUp +1, the value of the updated DGUp is DGUp + ∑ (i, j) -0.25 Σ (i +1, j-1) -0.5 Σ (i +1, j) -0.25 Σ (i +1, j +1), the value of the updated i is i +1, and the step S542 is skipped to;
further, in step S550, the method for regulating and controlling the air volume and the direction of the air cooler according to the level of the micro-wrinkles is as follows: obtaining the average value of TW micro-wrinkle magnetic chains Mag before the current time as a reference micro-wrinkle magnetic chain WMag, calculating the cosine similarity PRN between the Mag and the WMag obtained at the current time through the cosine similarity, and executing a fine adjustment scheme by the upper computer according to the cosine similarity, wherein the solution is as follows:
when the cosine similarity range is [ -1, -0.5], improving the air volume of the current air cooler of the film blowing machine by 20%;
when the cosine similarity range is (-0.5, 0%), the air quantity of the current air cooler of the film blowing machine is increased by 10%;
when the cosine similarity range is (0, 0.5), reducing the air quantity of the current air cooler of the film blowing machine by 10 percent;
and when the cosine similarity range is (0.5.1), reducing the current air volume of the air cooler of the film blowing machine by 20%.
Preferably, the value of WT is taken to be an integer value within [100,500 ].
The invention also provides an equipment system for producing the high-performance fully biodegradable agricultural mulching film, which comprises the following components in percentage by weight: a processor, a memory and a computer program stored in the memory and operable on the processor, the processor implementing the steps of producing the high-performance fully biodegradable agricultural mulch film when executing the computer program, the equipment system for producing the high-performance fully biodegradable agricultural mulch film can be operated in computing equipment such as desktop computers, notebooks, palmtops and cloud data centers, the operable system can include, but is not limited to, the processor, the memory and a server cluster, the processor executing the computer program and operating in the following units of the system:
the data acquisition unit is used for graying the images of the double-folded film at intervals of time T and identifying the film to obtain a film gray image;
a level test unit for calculating a micro-wrinkle level using the film gray map;
the model building unit is used for building a micro-wrinkle estimation model according to the micro-wrinkle levels from the current moment to the previous N moments;
the data transmission unit is used for transmitting the data to be transmitted to the data buffer pool;
the characteristic extraction unit is used for obtaining a micro-wrinkle magnetic chain through a micro-wrinkle estimation model;
the storage buffer unit is used for storing the folded magnetic chains in various forms;
and the fine adjustment control unit is used for adjusting and controlling the air volume and the direction of the air cooler according to the level of the micro-folds.
The equipment system for producing the high-performance full-biodegradable agricultural mulching film can be operated in computing equipment such as desktop computers, notebooks, palm computers, cloud servers and the like. The equipment system for producing the high-performance fully biodegradable agricultural mulching film can be operated by a system comprising, but not limited to, a processor and a memory. It will be understood by those skilled in the art that the examples are merely illustrative of one type of equipment system for producing a high performance fully biodegradable agricultural mulch and do not constitute a limitation on one type of equipment system for producing a high performance fully biodegradable agricultural mulch, and may include more or less than a proportion of components, or combinations of certain components, or different components, for example the one type of equipment system for producing a high performance fully biodegradable agricultural mulch may also include input output devices, network access devices, buses, and the like.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, the processor being the control center of the facility system operational system for producing the high performance fully biodegradable agricultural mulch, various interfaces and lines connecting various parts of the overall facility system operational system for producing the high performance fully biodegradable agricultural mulch.
The memory can be used for storing the computer program and/or the module, and the processor realizes various functions of the information acquisition system of the equipment system for producing the high-performance full-biodegradable agricultural mulching film by operating or executing the computer program and/or the module stored in the memory and calling the data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
The following are some of the codes that participate in the present invention:
Figure BDA0003429538830000121
Figure BDA0003429538830000131
although the description of the present disclosure has been rather exhaustive and particularly described with respect to several illustrated embodiments, it is not intended to be limited to any such details or embodiments or any particular embodiments, so as to effectively encompass the intended scope of the present disclosure. Furthermore, the foregoing describes the disclosure in terms of embodiments foreseen by the inventor for which an enabling description was available, notwithstanding that insubstantial modifications of the disclosure, not presently foreseen, may nonetheless represent equivalent modifications thereto.

Claims (5)

1. The high-performance full-biodegradable agricultural mulching film is characterized by comprising the following materials in parts by weight:
15-40 parts of polyglycolide, 60-85 parts of polypropylene carbonate, 0.6-0.85 part of maleic anhydride, 0.3-0.8 part of phthalic anhydride, 0.75-2 parts of plasticizer, 0.25-5 parts of compatilizer, 10100.1 parts of antioxidant, 1680.2 parts of antioxidant, UV 3280.2 parts and 0.2 part of white oil; the preparation method of the mulching film comprises the following steps:
s100, adding polyglycolide, phthalic anhydride and a plasticizer into a parallel double-screw extruder for melting and blending, air cooling and granulating to obtain polyglycolide master batches;
s200, adding the polypropylene carbonate and maleic anhydride into a parallel double-screw extruder, melting, blending, air-cooling and granulating to obtain polypropylene carbonate master batches;
s300, uniformly mixing polypropylene carbonate master batches, polyglycolide master batches, a compatilizer, an antioxidant 1010, an antioxidant 168, UV328 and white oil, adding the mixture into an extruder, melting, blending, air-cooling and granulating to obtain master batches for film blowing;
s400, injecting master batches for film blowing into a film blowing machine and controlling the film blowing machine to blow the film to form a film tube;
s500, folding the film tube into a double-folded film through a traction roller, monitoring the double-folded film in real time and controlling a film blowing machine to blow the film;
s600, winding the double-folded film to obtain a finished product.
2. The high-performance full-biodegradable agricultural mulching film according to claim 1, wherein in the step S500, the method for monitoring the double-folded film in real time and controlling the film blowing of the film blowing machine comprises the following steps:
s510, shooting the double-folded film through an industrial CCD camera at intervals of time T to obtain double-folded film images;
s520, graying the double-folded film image and identifying the film to obtain a film gray image;
s530, calculating a micro-wrinkle level by using the membrane gray scale map;
s540, constructing a micro-wrinkle estimation model according to the micro-wrinkle levels from the current moment to the previous N moments;
s550, obtaining a micro-wrinkle magnetic chain through a micro-wrinkle estimation model;
and S560, regulating and controlling the air volume and direction of an air cooler of the film blowing machine according to the micro-wrinkle magnetic chain.
3. The high-performance full-biodegradable agricultural mulching film according to claim 2, wherein in step S520, the method for graying the images of the double-folded film and identifying the film to obtain the gray-scale image comprises the following steps: graying the double-folded film image by a weighted average method to form an initial gray image; and carrying out edge detection on the primary gray level image, obtaining edge curves through the edge detection, dividing the primary gray level image into a plurality of image areas by each edge curve, selecting the image area with the largest area as a double-folded film area, and intercepting the image of the double-folded film area of the primary gray level image as a film gray level image.
4. The high-performance full-biodegradable agricultural mulching film according to claim 2, wherein in the step S540, the method for constructing the micro-wrinkle estimation model according to the micro-wrinkle levels from the current time to the previous N times is as follows: micro-wrinkle estimation model ∑ [ [ Feat [ ]0，Feat1，…，FeatN]Wherein Feat0Indicating the level of micro-folds, Feat, at the current momentNRepresenting the level of the micro-wrinkles at the first N moments, the micro-wrinkle estimation model sigma is a K-dimensional data table with the length of N + 1.
5. The high-performance full-biodegradable agricultural mulching film according to claim 2, wherein in the step S550, the method for regulating the air volume and the direction of the air cooler according to the level of the micro-folds is as follows: obtaining the average value of TW micro-wrinkle magnetic chains Mag before the current time as a reference micro-wrinkle magnetic chain WMag, calculating the cosine similarity PRN between the Mag and the WMag obtained at the current time through the cosine similarity, and executing a fine adjustment scheme by the upper computer according to the cosine similarity, wherein the solution is as follows:
when the cosine similarity range is [ -1, -0.5], improving the air volume of the current air cooler of the film blowing machine by 20%;
when the cosine similarity range is (-0.5, 0%), the air quantity of the current air cooler of the film blowing machine is increased by 10%;
when the cosine similarity range is (0, 0.5), reducing the air quantity of the current air cooler of the film blowing machine by 10 percent;
when the cosine similarity range is in (0.5.1), reducing the air quantity of the current air cooler of the film blowing machine by 20%;
wherein the WT value is an integer value within [100,500 ].
CN202111590015.4A 2021-12-23 2021-12-23 High-performance full-biodegradable agricultural mulching film Pending CN114058170A (en)

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CN115519809A (en) * 2022-09-28 2022-12-27 广东汇发塑业科技有限公司 Preparation method of high-barrier biodegradable mulching film and prepared mulching film
CN118297456A (en) * 2024-03-27 2024-07-05 甘肃济洋塑料有限公司 Intelligent supervision system for mulch production

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CN107488343A (en) * 2017-09-12 2017-12-19 江苏金聚合金材料有限公司 High-barrier whole life cycle design and preparation method thereof
CN107556536A (en) * 2017-09-12 2018-01-09 江苏金聚合金材料有限公司 Low-cost bio based fully degradable film and preparation method thereof

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CN107556536A (en) * 2017-09-12 2018-01-09 江苏金聚合金材料有限公司 Low-cost bio based fully degradable film and preparation method thereof

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