CN117779334A - Needle selection flower type transformation control system for computerized flat knitting machine - Google Patents
Needle selection flower type transformation control system for computerized flat knitting machine Download PDFInfo
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- CN117779334A CN117779334A CN202410219023.5A CN202410219023A CN117779334A CN 117779334 A CN117779334 A CN 117779334A CN 202410219023 A CN202410219023 A CN 202410219023A CN 117779334 A CN117779334 A CN 117779334A
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- 238000009940 knitting Methods 0.000 title claims abstract description 228
- 230000009466 transformation Effects 0.000 title abstract description 6
- 238000001514 detection method Methods 0.000 claims abstract description 155
- 239000004744 fabric Substances 0.000 claims abstract description 66
- 238000009941 weaving Methods 0.000 claims abstract description 22
- 238000010923 batch production Methods 0.000 claims abstract description 5
- 239000002759 woven fabric Substances 0.000 claims description 44
- 238000003708 edge detection Methods 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 30
- 230000008569 process Effects 0.000 claims description 23
- 230000008859 change Effects 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000012360 testing method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000005304 joining Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 230000008713 feedback mechanism Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 238000010191 image analysis Methods 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
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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
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- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention relates to the technical field of computerized flat knitting machines, in particular to a needle selection flower type transformation control system for a computerized flat knitting machine, which comprises the following components: the pattern acquisition module acquires a target knitting pattern and converts the target knitting pattern into pattern information which can be read by a computerized flat knitting machine, the signal reading module determines the type of knitting needles, the type of knitting lines and the engagement parameters, the weaving module can weave according to the parameters of the computerized flat knitting machine determined by the signal reading module to obtain a weaving sample and a finished product of the weaving in batch production, and the detection module can carry out multiple detection on the weaving sample to ensure that the product meets quality standards; the flat knitting machine adjusting module can determine the shape consistency of the fabric sample according to the detection result, and adjust the subsequent working mode of the computerized flat knitting machine according to the shape consistency.
Description
Technical Field
The invention relates to the technical field of computerized flat knitting machines, in particular to a needle selection flower type conversion control system for a computerized flat knitting machine.
Background
Computerized flat knitting machine (Computerized Flat Knitting Machine) is an advanced knitting machine, and various complex patterns and designs can be realized through computer control. These machines are commonly used to produce a variety of fabrics, including clothing, home textiles, and industrial fabrics; the computerized flat knitting machine can automatically weave various patterns according to the requirements of a designer by programming and controlling the movement of the knitting needles. Different knitting needles, knitting threads and engagement parameters are used, so that different texture effects and fabric structures can be realized. Meanwhile, the computerized flat knitting machine can realize pattern designs with different sizes and layouts by adjusting the repetition times and arrangement modes of patterns.
Chinese patent publication No.: CN109989165B discloses a computerized flat knitting machine and knitting method thereof, comprising: obtaining a flower file; calculating and extracting pattern row data meeting more than two needle methods within a preset distance from the pattern file; combining the two or more stitches in the pattern line data in a same system and a same stroke; processing the pattern row data to control the cam mechanism to perform more than two actions sequentially according to the combined needle method in the same stroke of the same system, so that the needle method between the positions meeting the preset distance in the same row and the needle method between the different positions are combined in the same stroke to perform knitting, and the number of knitting lines of the pattern row is reduced; from this, the computerized flat knitting machine and the knitting method thereof have the following problems: the overall effect of the fabric is not considered to be affected by the difference in knitting stitches at the knitted junctions.
Disclosure of Invention
Therefore, the invention provides a needle selection pattern change control system for a computerized flat knitting machine, which is used for solving the problem that the integral effect of a fabric is influenced due to the difference of knitting lines at knitting joints in the prior art.
In order to achieve the above object, the present invention provides a needle selection flower type conversion control system for a computerized flat knitting machine, comprising:
the pattern acquisition module is used for acquiring a target knitting pattern and converting the target knitting pattern into pattern information which can be read by the computerized flat knitting machine;
the signal reading module is connected with the pattern acquisition module and used for determining the knitting needle type, the knitting line type and the connection parameter according to the pattern information and completing the target knitting pattern process according to the pattern information and the determined knitting needle type, knitting line type and connection parameter;
the weaving module is respectively connected with the pattern acquisition module and the signal reading module and is used for weaving a fabric sample and a fabric finished product produced in batch according to the target knitting pattern process finished by the computerized flat knitting machine determined by the signal reading module;
the detection module is connected with the weaving module and is used for detecting a woven fabric sample finished by the computerized flat knitting machine, including sample shape detection, joint edge detection and stretching detection, and recording detection results of all the detection;
the flat knitting machine adjusting module is respectively connected with the signal reading module and the detecting module and is used for determining the shape consistency of the woven fabric sample according to the detecting result of the detecting module, determining the working condition detecting frequency of the computerized flat knitting machine according to the shape consistency and determining the working adjusting mode of the computerized flat knitting machine according to the detecting result of the connecting edge detection;
the work adjusting mode comprises the steps of adjusting the needle number and the needle pitch of the knitting needles and adjusting the connection process when the types of the knitting needles are replaced.
Further, the signal reading module includes:
the tool determining unit is used for determining the knitting needle types of all knitting needles required by completing the pattern, the knitting line types corresponding to each knitting needle and the line difference at the joint when the knitting line is replaced according to the pattern information;
a parameter determining unit connected to the tool determining unit for determining the needle count and the needle pitch of each knitting needle based on the pattern information and the knitting needle type;
and the flow determining unit is respectively connected with the tool determining unit and the parameter determining unit and is used for determining the movement mode and the lifting mode of each knitting needle according to the pattern information and the knitting needle parameters.
Further, the detection module includes:
a shape detection unit for extracting a pattern shape of the fabric sample, and comparing the extracted pattern with an expected pattern generated from pattern information, and performing the shape detection on the fabric sample;
and the stretching detection unit is connected with the shape detection unit and is used for stretching detection of the knitted pattern of the fabric sample.
Further, the stretch detection by the stretch detection unit includes:
determining the specific position of the knitted pattern on the fabric sample;
determining a stretching detection area according to the specific position of the knitting pattern and the specific shape of the knitting pattern;
applying a uniform outward pulling force of the same magnitude to all boundaries of the stretch detection zone;
the stretching detection area is in a regular shape most similar to the knitting pattern.
Further, the stretch detecting unit is further configured to perform the joint edge detection, where the joint edge detection is performed after the stretch detection.
Further, the detection module determines whether to perform the shape detection according to a stretching detection result;
if the detection result of the stretching detection is qualified, the shape detection unit performs shape detection;
if the detection result of the stretching detection is unqualified, the signal reading module redetermines the needle number, the needle pitch and the knitting line type of each knitting needle.
Further, the flat knitting machine adjusting module determines the shape consistency of the fabric sample according to the detection result of the shape detection of the detecting module, and the shape consistency is determined according to the following formula:
，
wherein sigma is the shape consistency, l1 is the pattern edge perimeter of the fabric sample, l0 is the expected pattern edge perimeter, S1 is the pattern area of the fabric sample, S0 is the expected pattern area, m1 is the pattern gray value of the fabric sample, and m0 is the expected pattern gray value.
Further, the flat knitting machine adjusting module determines the working condition detection frequency of the computerized flat knitting machine according to the shape consistency;
if the shape consistency is smaller than or equal to the standard shape consistency, judging that the woven fabric sample is qualified, enabling the computerized flat knitting machine to perform batch production of woven fabric finished products, and determining the working condition detection frequency of the computerized flat knitting machine according to the shape consistency;
if the shape consistency is greater than the standard shape consistency, judging that the woven fabric sample is unqualified, and carrying out the joint edge detection on the woven fabric sample by a stretching detection unit of the detection module, and determining the working condition detection frequency of the computerized flat knitting machine according to the joint edge detection result.
Further, the flat knitting machine adjusting module determines an adjusting mode of the work of the computerized flat knitting machine according to a detection result of the joint edge detection;
if the connection edge detection result is qualified, the needle number and the needle pitch of each knitting needle are adjusted;
if the connection edge detection result is unqualified, the connection process during the replacement of the knitting needle type is adjusted.
Further, after the computerized flat knitting machine adjusting module determines the working adjusting mode of the computerized flat knitting machine, weaving again to obtain a woven fabric sample, detecting the woven fabric sample again, determining the shape consistency again, and determining the working condition detection frequency of the computerized flat knitting machine according to the shape consistency determined again.
Compared with the prior art, the method has the beneficial effects that the pattern acquisition module acquires the target knitting pattern and converts the target knitting pattern into pattern information which can be read by the computerized flat knitting machine, the signal reading module determines the knitting needle type, the knitting line type and the engagement parameter, the weaving module can weave according to the computerized flat knitting machine parameter determined by the signal reading module to obtain a fabric sample and a batch-produced fabric finished product, and the detection module can carry out multiple detection on the fabric sample to ensure that the product meets the quality standard; the flat knitting machine adjusting module can determine the shape consistency of the fabric sample according to the detection result, and adjust the subsequent working mode of the computerized flat knitting machine according to the shape consistency.
Further, in the needle selection pattern change control system for the computerized flat knitting machine, the stretching detection can ensure that the stretching test area corresponds to the pattern by determining the pattern position, so that the test result is more accurate; by selecting similar shapes and applying uniform tensile force, the pattern and the tensile property around the pattern can be accurately estimated, and the accuracy of the fabric sample estimation is improved.
Further, in the needle selection pattern change control system for the computerized flat knitting machine, quality and performance of a woven fabric sample are ensured by detection through two detection stages, and mass production is allowed only under the condition that both stretching detection and shape consistency detection are qualified; by automatic detection and judgment, whether the woven fabric sample meets the standard or not is rapidly and accurately determined, and time consumption and possible subjective errors of manual inspection are avoided.
Further, in the needle selection pattern change control system for the computerized flat knitting machine, a feedback mechanism is provided by detecting the woven fabric sample obtained by re-weaving again, so that the system can detect and solve the potential problem, the validity of the adjustment of the computerized flat knitting machine and the quality of the woven fabric sample produced by the computerized flat knitting machine can be ensured to accord with the standard by detecting the shape consistency again, any deviation possibly occurring in the adjustment process is better captured and corrected, and the defective rate is reduced; and the process of detecting the shape consistency again is incorporated into the adjustment flow, so that the whole production flow is more perfect and closed-loop.
Drawings
FIG. 1 is a schematic diagram of a needle selection pattern change control system for a computerized flat knitting machine according to an embodiment of the invention;
FIG. 2 is a flowchart of a needle pattern change control system for a computerized flat knitting machine according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a signal reading module of a needle selection flower type conversion control system for a computerized flat knitting machine according to an embodiment of the invention;
fig. 4 is a schematic diagram of a detection module structure of a needle selection flower type conversion control system for a computerized flat knitting machine according to an embodiment of the invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of a needle selection pattern transformation control system for a computerized flat knitting machine according to an embodiment of the invention; FIG. 2 is a flowchart of a needle pattern change control system for a computerized flat knitting machine according to an embodiment of the invention; the invention provides a needle selection flower type conversion control system for a computerized flat knitting machine, which comprises the following components:
the pattern acquisition module is used for acquiring a target knitting pattern and converting the target knitting pattern into pattern information which can be read by the computerized flat knitting machine;
the signal reading module is connected with the pattern acquisition module and used for determining the knitting needle type, the knitting line type and the connection parameter according to the pattern information and completing the target knitting pattern process according to the pattern information and the determined knitting needle type, knitting line type and connection parameter;
the weaving module is respectively connected with the pattern acquisition module and the signal reading module and is used for weaving a fabric sample and a fabric finished product produced in batch according to the target knitting pattern process finished by the computerized flat knitting machine determined by the signal reading module;
the detection module is connected with the weaving module and is used for detecting a woven fabric sample finished by the computerized flat knitting machine, including sample shape detection, joint edge detection and stretching detection, and recording detection results of all the detection;
the flat knitting machine adjusting module is respectively connected with the signal reading module and the detecting module and is used for determining the shape consistency of the woven fabric sample according to the detecting result of the detecting module, determining the working condition detecting frequency of the computerized flat knitting machine according to the shape consistency and determining the working adjusting mode of the computerized flat knitting machine according to the detecting result of the connecting edge detection;
the work adjusting mode comprises the steps of adjusting the needle number and the needle pitch of the knitting needles and adjusting the connection process when the types of the knitting needles are replaced.
In practice, the pattern shape includes a pattern edge Zhou Chang, a desired thread type, and a linear density of each pattern region, the pattern regions being divided by the thread type.
The pattern acquisition module acquires a target knitting pattern and converts the target knitting pattern into pattern information which can be read by the computerized flat knitting machine, the signal reading module determines the knitting needle type, the knitting line type and the engagement parameters, the weaving module can weave according to the computerized flat knitting machine parameters determined by the signal reading module to obtain a fabric sample and a batch-produced fabric finished product, and the detection module can carry out multiple detection on the fabric sample to ensure that the product meets the quality standard; the flat knitting machine adjusting module can determine the shape consistency of the fabric sample according to the detection result, and adjust the subsequent working mode of the computerized flat knitting machine according to the shape consistency.
Fig. 3 is a schematic diagram of a signal reading module of a needle selection pattern transformation control system for a computerized flat knitting machine according to an embodiment of the invention, where the signal reading module includes:
the tool determining unit is used for determining the knitting needle types of all knitting needles required by completing the pattern, the knitting line types corresponding to each knitting needle and the line difference at the joint when the knitting line is replaced according to the pattern information;
a parameter determining unit connected to the tool determining unit for determining the needle count and the needle pitch of each knitting needle based on the pattern information and the knitting needle type;
and the flow determining unit is respectively connected with the tool determining unit and the parameter determining unit and is used for determining the movement mode and the lifting mode of each knitting needle according to the pattern information and the knitting needle parameters.
In practice, a target knitted pattern may require one or more needles, as well as one or more stitches, which are simultaneously replaced when the needles are replaced, the difference being the difference in diameter between the two stitches at the junction;
in practical application, the types of all the knitting needles required for completing the pattern, the knitting line types corresponding to each knitting needle, and the movement mode and lifting mode of each knitting needle are determined according to the parameters of the computerized flat knitting machine.
It can be understood that the threads used in the weaving process of the computerized flat knitting machine are divided into threads with larger thickness differences, such as fine threads, medium threads, thick threads, knitting threads and the like, and the finished pattern can be loose or deformed under the condition of large thread differences, so that the reinforcement mode needs to be determined according to the thread differences.
Referring to fig. 4, a schematic structural diagram of a detection module of a needle selection flower type conversion control system for a computerized flat knitting machine according to an embodiment of the invention is shown, where the detection module includes:
a shape detection unit for extracting a pattern shape of the fabric sample, and comparing the extracted pattern with an expected pattern generated from pattern information, and performing the shape detection on the fabric sample;
and the stretching detection unit is connected with the shape detection unit and is used for stretching detection of the knitted pattern of the fabric sample.
In practice, the desired pattern is an ideal pattern that is simulated in a computing device such as a computer based on the target knitted pattern.
Specifically, the stretch detection by the stretch detection unit includes:
determining the specific position of the knitted pattern on the fabric sample;
determining a stretching detection area according to the specific position of the knitting pattern and the specific shape of the knitting pattern;
applying a uniform outward pulling force of the same magnitude to all boundaries of the stretch detection zone;
the stretching detection area is in a regular shape most similar to the knitting pattern.
In the implementation, the specific position of the knitted pattern on the fabric sample needs to include the complete knitted pattern in a specific position range, the stretching detection area is larger than the specific position, the center of the specific position is the same as that of the stretching detection area, and the size of the tension used for detection is determined according to the type of the knitting thread, namely the self-elasticity characteristic of the knitting thread is determined;
for example, a specific location is a square of 20×20 cm, and the stretch detection zone may be a square of 25×25 cm, with the tensile force applied by fixing all boundaries of the stretch detection zone and applying the same amount of tensile force outward.
In the needle selection pattern change control system for the computerized flat knitting machine, the stretching detection can ensure that the stretching test area corresponds to the pattern by determining the pattern position, so that the test result is more accurate; by selecting similar shapes and applying uniform tensile force, the pattern and the tensile property around the pattern can be accurately estimated, and the accuracy of the fabric sample estimation is improved.
Specifically, the stretch detection unit is further configured to perform the joint edge detection, where the joint edge detection is performed after the stretch detection.
In practice, the splice edge detection is performed on the basis of a stretch detection, and the gap size at the splice is measured when a uniform outward, uniform tensile force is applied to all boundaries of the stretch detection zone.
Specifically, the detection module determines whether to perform the shape detection according to a tensile detection result;
if the detection result of the stretching detection is qualified, the shape detection unit performs shape detection;
if the detection result of the stretching detection is unqualified, the signal reading module redetermines the needle number, the needle pitch and the knitting line type of each knitting needle.
In the implementation, the detection result of the stretching detection is determined according to the deformation amount of the woven fabric sample after the tensile force is applied, and if the deformation amount is not in the preset deformation amount range, the detection result of the stretching detection is judged to be unqualified;
the preset deformation amount range is determined according to the self elastic characteristics of the knitting yarn, the larger the elastic coefficient of the knitting yarn is, the more easily the fabric is deformed, the larger the preset deformation amount range is, the smaller the elastic coefficient of the knitting yarn is, the less easily the fabric is deformed, and the smaller the preset deformation amount range is;
if the deformation of the woven fabric sample is out of the preset deformation range which is 1.2 times, the type of the woven fabric is redetermined, and if the deformation of the woven fabric sample is in the preset deformation range which is 1.2 times and out of the preset deformation range, the needle count and the needle pitch of each knitting needle are redetermined.
Specifically, the flat knitting machine adjusting module determines a shape consistency of the fabric sample according to a detection result of shape detection by the detecting module, wherein the shape consistency is determined according to the following formula:
，
wherein sigma is the shape consistency, l1 is the pattern edge perimeter of the fabric sample, l0 is the expected pattern edge perimeter, S1 is the pattern area of the fabric sample, S0 is the expected pattern area, m1 is the pattern gray value of the fabric sample, and m0 is the expected pattern gray value.
In the implementation, the pattern edge perimeter of the fabric sample and the pattern area of the fabric sample are obtained by extracting the pattern of the fabric sample through a shape detection unit, wherein the extracting pattern is that the pattern of the fabric sample is extracted into an image form, the pattern edge perimeter of the fabric sample and the pattern area of the fabric sample are obtained by analyzing the image through any one of the existing image analysis technologies, and meanwhile, the pattern gray value of the fabric sample can be obtained;
the perimeter of the expected pattern edge, the area of the expected pattern and the gray value of the expected pattern are determined according to the expected pattern;
the larger the shape consistency, the worse the pattern quality of the fabric sample.
Specifically, the flat knitting machine adjusting module determines the working condition detection frequency of the computerized flat knitting machine according to the shape consistency;
if the shape consistency is smaller than or equal to the standard shape consistency, judging that the woven fabric sample is qualified, enabling the computerized flat knitting machine to perform batch production of woven fabric finished products, and determining the working condition detection frequency of the computerized flat knitting machine according to the shape consistency;
if the shape consistency is greater than the standard shape consistency, judging that the woven fabric sample is unqualified, and carrying out the joint edge detection on the woven fabric sample by a stretching detection unit of the detection module, and determining the working condition detection frequency of the computerized flat knitting machine according to the joint edge detection result.
In implementation, when the standard shape consistency is 1.1 or less, the current working condition detection frequency is that after 10 woven fabric finished products are produced, the last woven fabric finished product is subjected to working condition detection, wherein the working condition detection comprises shape detection, stretching detection and joint edge detection, if the working condition detection of the finished product is not passed, the woven fabric produced next is a woven fabric sample, and the computerized flat knitting machine carries out detection and adjustment processes on the sample again.
It can be understood that whether the woven fabric sample is qualified or not is determined by two tests, and the batch production of the woven fabric finished product can be performed only when the test result of the stretching test is qualified and the shape consistency determined by the shape test is satisfactory.
In the needle selection flower type transformation control system for the computerized flat knitting machine, the quality and the performance of a woven fabric sample are ensured by detecting through two detection stages, and mass production is allowed only under the condition that both the stretching detection and the shape consistency detection are qualified; by automatic detection and judgment, whether the woven fabric sample meets the standard or not is rapidly and accurately determined, and time consumption and possible subjective errors of manual inspection are avoided.
Specifically, the flat knitting machine adjusting module determines an adjusting mode of the work of the computerized flat knitting machine according to a detection result of the joint edge detection;
if the connection edge detection result is qualified, the needle number and the needle pitch of each knitting needle are adjusted;
if the connection edge detection result is unqualified, the connection process during the replacement of the knitting needle type is adjusted.
In the implementation, the joint edge detection is performed on the basis of the stretching detection, and when the uniform and outward tensile force with the same magnitude is applied to all boundaries of the stretching detection area, if the joint edge is improperly processed, the gaps of the joint edge are larger than the gaps among other part knitting lines;
judging that the detection result of the joint edge is unqualified when the gap value of the joint is larger than 1.2 times of the gap value between the non-joint weaving lines, and adding a joint treatment of a middle value line width once in the joint process, wherein the specific value of the middle value line width is the median value of the weaving line widths of two sides; if the joining process comprises one joining process, adding one joining process again, wherein the line width of the intermediate value of the two joining processes is two trisection points of the width of the woven lines at two sides respectively, and the working condition detection frequency is used for detecting each woven fabric sample;
when the gap value of the joint is smaller than or equal to 1.2 times of the gap value between the non-joint knitting lines, judging that the joint edge detection result is qualified, and magnifying or reducing the needle number and the needle pitch of each knitting needle according to the equal ratio of the pattern gray value of the fabric sample to the expected pattern gray value; at the moment, the working condition detection frequency is two fabric samples produced every time, and the produced fabric samples are detected.
Specifically, after the computerized flat knitting machine adjusting module determines the working adjusting mode of the computerized flat knitting machine, weaving again to obtain a woven fabric sample, detecting the woven fabric sample again, determining the shape consistency again, and determining the working condition detection frequency of the computerized flat knitting machine according to the shape consistency determined again.
In the implementation, only after the shape consistency is smaller than or equal to the standard shape consistency, the finished fabric can be produced, before the shape consistency meets the requirement, the fabric samples are produced, the working mode of the computerized flat knitting machine is adjusted according to the detection result of the fabric samples, the computer flat knitting machine after each adjustment produces fabric samples, and the computer flat knitting machine can be determined to produce the finished fabric according to the detection result of the fabric samples.
In the needle selection pattern change control system for the computerized flat knitting machine, a feedback mechanism is provided by detecting the woven fabric sample obtained by re-weaving again, so that the system can detect and solve potential problems, the validity of the adjustment of the computerized flat knitting machine and the quality of the woven fabric sample produced by the computerized flat knitting machine can be ensured to accord with the standard by detecting the shape consistency again, any deviation possibly occurring in the adjustment process is better captured and corrected, and the defective rate is reduced; and the process of detecting the shape consistency again is incorporated into the adjustment flow, so that the whole production flow is more perfect and closed-loop.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A needle pattern selection changing control system for a computerized flat knitting machine, comprising:
the pattern acquisition module is used for acquiring a target knitting pattern and converting the target knitting pattern into pattern information which can be read by the computerized flat knitting machine;
the signal reading module is connected with the pattern acquisition module and used for determining the knitting needle type, the knitting line type and the connection parameter according to the pattern information and completing the target knitting pattern process according to the pattern information and the determined knitting needle type, knitting line type and connection parameter;
the weaving module is respectively connected with the pattern acquisition module and the signal reading module and is used for weaving a fabric sample and a fabric finished product produced in batch according to the target knitting pattern process finished by the computerized flat knitting machine determined by the signal reading module;
the detection module is connected with the weaving module and is used for detecting a woven fabric sample finished by the computerized flat knitting machine, including sample shape detection, joint edge detection and stretching detection, and recording detection results of all the detection;
the flat knitting machine adjusting module is respectively connected with the signal reading module and the detecting module and is used for determining the shape consistency of the woven fabric sample according to the detecting result of the detecting module, determining the working condition detecting frequency of the computerized flat knitting machine according to the shape consistency and determining the working adjusting mode of the computerized flat knitting machine according to the detecting result of the connecting edge detection;
the work adjusting mode comprises the steps of adjusting the needle number and the needle pitch of the knitting needles and adjusting the connection process when the types of the knitting needles are replaced.
2. The needle pattern change control system for a computerized flat knitting machine according to claim 1, wherein the signal reading module comprises:
the tool determining unit is used for determining the knitting needle types of all knitting needles required by completing the pattern, the knitting line types corresponding to each knitting needle and the line difference at the joint when the knitting line is replaced according to the pattern information;
a parameter determining unit connected to the tool determining unit for determining the needle count and the needle pitch of each knitting needle based on the pattern information and the knitting needle type;
and the flow determining unit is respectively connected with the tool determining unit and the parameter determining unit and is used for determining the movement mode and the lifting mode of each knitting needle according to the pattern information and the knitting needle parameters.
3. The needle pattern change control system for a computerized flat knitting machine according to claim 2, wherein the detection module includes:
a shape detection unit for extracting a pattern shape of the fabric sample, and comparing the extracted pattern with an expected pattern generated from pattern information, and performing the shape detection on the fabric sample;
and the stretching detection unit is connected with the shape detection unit and is used for stretching detection of the knitted pattern of the fabric sample.
4. The needle pattern change control system for a computerized flat knitting machine according to claim 3, wherein the stretch detection by the stretch detection unit includes:
determining the specific position of the knitted pattern on the fabric sample;
determining a stretching detection area according to the specific position of the knitting pattern and the specific shape of the knitting pattern;
applying a uniform outward pulling force of the same magnitude to all boundaries of the stretch detection zone;
the stretching detection area is in a regular shape most similar to the knitting pattern.
5. The needle pattern changing control system for a computerized flat knitting machine according to claim 4, wherein the stretch detecting unit is further configured to perform the engagement edge detection, the engagement edge detection being performed after the stretch detection.
6. The needle pattern change control system for a computerized flat knitting machine of claim 5, wherein the detection module determines whether to perform the shape detection based on a tensile detection result;
if the detection result of the stretching detection is qualified, the shape detection unit performs shape detection;
if the detection result of the stretching detection is unqualified, the signal reading module redetermines the needle number, the needle pitch and the knitting line type of each knitting needle.
7. The needle pattern conversion control system for a computerized flat knitting machine according to claim 6, wherein the flat knitting machine adjustment module determines a shape uniformity of the fabric sample based on a detection result of the shape detection by the detection module, the shape uniformity being determined according to the following formula:
，
wherein sigma is the shape consistency, l1 is the pattern edge perimeter of the fabric sample, l0 is the expected pattern edge perimeter, S1 is the pattern area of the fabric sample, S0 is the expected pattern area, m1 is the pattern gray value of the fabric sample, and m0 is the expected pattern gray value.
8. The needle pattern change control system for a computerized flat knitting machine of claim 7, wherein the flat knitting machine adjustment module determines a working condition detection frequency of the computerized flat knitting machine according to the shape consistency;
if the shape consistency is smaller than or equal to the standard shape consistency, judging that the woven fabric sample is qualified, enabling the computerized flat knitting machine to perform batch production of woven fabric finished products, and determining the working condition detection frequency of the computerized flat knitting machine according to the shape consistency;
if the shape consistency is greater than the standard shape consistency, judging that the woven fabric sample is unqualified, and carrying out the joint edge detection on the woven fabric sample by a stretching detection unit of the detection module, and determining the working condition detection frequency of the computerized flat knitting machine according to the joint edge detection result.
9. The needle pattern change control system for a computerized flat knitting machine according to claim 8, wherein the flat knitting machine adjustment module determines an adjustment mode of the work of the computerized flat knitting machine according to a detection result of the engagement edge detection;
if the connection edge detection result is qualified, the needle number and the needle pitch of each knitting needle are adjusted;
if the connection edge detection result is unqualified, the connection process during the replacement of the knitting needle type is adjusted.
10. The needle pattern change control system for a computerized flat knitting machine according to claim 9, wherein the computerized flat knitting machine rewinds a woven fabric sample after the computerized flat knitting machine adjustment module determines a work adjustment mode of the computerized flat knitting machine, rewinds the rewirated woven fabric sample, redetects the rewirated woven fabric sample, redetermines shape consistency, and determines a working condition detection frequency of the computerized flat knitting machine according to the redetermined shape consistency.
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