CN117663984A - Method for automatically judging state of yarn rod and device used by same - Google Patents
Method for automatically judging state of yarn rod and device used by same Download PDFInfo
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- CN117663984A CN117663984A CN202311526276.9A CN202311526276A CN117663984A CN 117663984 A CN117663984 A CN 117663984A CN 202311526276 A CN202311526276 A CN 202311526276A CN 117663984 A CN117663984 A CN 117663984A
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- 230000003287 optical effect Effects 0.000 claims description 7
- 230000003044 adaptive effect Effects 0.000 claims description 4
- 239000004753 textile Substances 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
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- 238000009987 spinning Methods 0.000 description 4
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Abstract
The utility model discloses a method and a device for automatically judging the state of a yarn rod, which comprises the following steps: when the yarn rod passes through the light curtain at a constant speed on the conveyor belt, the single chip can acquire a plurality of groups of shielding data and form an array, the length of the array can be approximately regarded as the length of the yarn rod, the values of the array elements are the diameter sizes of different sections, and the following three methods are adopted to judge the state of the yarn rod: (1) comparing the first element and the last element of the array; (2) Grouping the obtained arrays appropriately, carrying out average value operation on each group, and comparing the first group and the last group of the grouping; (3) And comparing the size of the head element of the group with the big head reference size of the yarn rod, voting the results of the three judging methods, and obtaining the final result which is the result with the largest vote number. The method has the advantages that the accuracy of judging the yarn rod-shaped state is obviously improved, the reference size and the reference length size are automatically updated in an iterative mode through the self-adaptive algorithm, and the low-probability misjudgment caused by measurement interference is solved.
Description
Technical Field
The utility model relates to the field of textile machinery equipment, in particular to a method and a device for identifying the size head of a yarn rod on an automatic yarn feeder of a winding machine.
Background
The textile industry is one of the main labor intensive industries, has higher labor cost, and particularly is a winding process which is an important link of the textile industry, and a winding machine needs to be provided with 3-5 yarn inserting workers to finish daily production, and the yarn inserting workers repeatedly take cops, extract yarn ends and put the cops into a yarn warehouse every day. Moreover, the problem that the noise pollution is large and a large amount of short fibers exist in the air exists in the winding workshop generally, so that the health of workers is threatened. Therefore, intelligent transformation of the winding workshop is realized, so that the work pressure of textile factories is reduced, the working efficiency is improved, and the working environment of workers is improved.
As disclosed in chinese patent publication No. CN114803708A, a yarn feeding robot includes a mounting base; the arrangement module is arranged on the mounting seat and used for arranging a plurality of cops in a preset mode; the shaping module is connected with the finishing module and is used for acquiring corresponding thread ends from a plurality of cops which are arranged in a preset mode; and the feeding module is connected with the shaping module and is used for twisting the thread ends of the acquired corresponding thread ends and feeding the twisted thread ends to a preset position.
For another example, chinese patent publication No. CN216549035U discloses a cop finishing device for an automatic yarn feeder, which includes a conveyor belt, and an identification finishing area; the conveying belt is connected with a cop lifting device of the automatic yarn feeder; the tail end of the conveying belt is provided with an identification finishing area; the identification and arrangement area comprises a visual identification device, a pushing device, a picking plate device, a recovery box and a blanking channel; the pushing device is arranged on one side of the conveying belt of the cop finishing area; and a cop blanking area is arranged on the other side of the conveying belt in the cop finishing area.
The finishing module or the visual recognition device of the patent can detect the specification and the size head of the cop (yarn rod), but the detection precision is insufficient, and the size of the size end of some yarn rods is close due to different lengths of the yarn rods, so that the detection accuracy cannot be guaranteed.
Disclosure of Invention
The utility model aims to solve the technical problem that the existing method for detecting the size head of a yarn rod is inaccurate, and provides a method for automatically judging the state of the yarn rod and a device used by the method.
The technical scheme of the utility model is as follows: the method for automatically judging the state of the yarn rod comprises the following steps: the method comprises the steps that a communication period is established by the singlechip and a measuring light curtain, the communication period is used as a measurement beat, the number of optical axis light points shielded by a yarn rod passing through the light curtain at one time is obtained once in each communication, the singlechip calculates the size of an object passing through the light curtain at one time through the shielded number of light points, when the yarn rod passes through the light curtain on a conveyor belt at a constant speed, the singlechip acquires multiple groups of shielding data and forms an array, the length of the array can be approximately regarded as the length of the yarn rod, the values of the array elements are the diameter sizes of different sections, and meanwhile, the three methods are adopted to judge the state of the yarn rod: (1) comparing the first element and the last element of the array; (2) Grouping the obtained arrays appropriately, carrying out average value operation on each group, and comparing the first group and the last group of the grouping; (3) And comparing the size of the head element of the array with the big head reference size of the yarn rod, voting the results of the three judging methods, wherein one result with the largest number of votes is a big head final result, if the length of the array exceeds a high threshold value, the array is considered to be overlength, if the length of the array is smaller than a low threshold value, the array is considered to be foreign matter, if the measured diameter exceeds the high threshold value, the yarn is considered to be overthick, and if the measured overall diameter is smaller than the low threshold value, the yarn is considered to be empty.
According to the technical scheme, the big end reference size of the yarn bar, the reference length of the yarn bar, the length high threshold value, the length low threshold value, the diameter high threshold value and the diameter low threshold value are updated iteratively through an adaptive algorithm.
An apparatus for automatically determining the status of a yarn bar, comprising: the single chip microcomputer, measure light curtain, conveyer belt and yarn stick, the yarn stick is on the conveyer belt, it is used for measuring the yarn stick to measure the light curtain in the conveyer belt both sides, the single chip microcomputer is connected with the measurement light curtain signal.
The measuring component of the measuring light curtain in the above proposal is a measuring grating.
The method has the advantages that accuracy of judging the rod-shaped state of the yarn is obviously improved, the reference size and the reference length size of the large head are automatically iterated and updated through the self-adaptive algorithm, the problem of low probability misjudgment caused by measurement interference is solved, the measurement parameters can be automatically iterated and updated during multi-specification production replacement, whether an object passing through a measuring light curtain is foreign matter, yarn overlapping, interference and the like can be judged according to the iterated reference size, and extra-long yarn and tailing yarn can be judged.
Drawings
FIG. 1 is a flow chart of a preferred embodiment of the present utility model;
FIG. 2 is a schematic view of an apparatus for automatically determining the status of a yarn bar according to the present utility model;
in the figure, 1, a measuring light curtain, 2, a conveyor belt, 3 and a yarn rod.
Detailed Description
The technical solutions in the embodiments of the present utility model are clearly and completely described below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. Based on the embodiments of the present utility model, all other embodiments of the utility model are within the scope of the present utility model for those of ordinary skill in the art without making any inventive effort.
The method for automatically judging the state of the yarn rod comprises the following steps: the method comprises the steps that a communication period is established by using a singlechip and a measuring light curtain, the communication period is used as a measurement beat, the number of optical axis light points shielded by a yarn rod passing through the light curtain at one time is obtained once in each communication, the singlechip calculates the size of an object passing through the light curtain at one time through the shielded number of light points, when the yarn rod 3 passes through the light curtain on a conveyor belt 2 at a constant speed, the singlechip acquires a plurality of groups of shielding data and forms an array, the length of the array can be approximately regarded as the length of the yarn rod, the values of the array elements are the diameter sizes of different sections, and meanwhile, the three methods are adopted to judge the state of the yarn rod: (1) comparing the first element and the last element of the array; (2) Grouping the obtained arrays appropriately, carrying out average value operation on each group, and comparing the first group and the last group of the grouping; (3) And comparing the size of the head element of the array with the big head reference size of the yarn rod, voting the results of the three judging methods, wherein one result with the largest number of votes is a big head final result, if the length of the array exceeds a high threshold value, the array is considered to be overlength, if the length of the array is smaller than a low threshold value, the array is considered to be foreign matter, if the measured diameter exceeds the high threshold value, the yarn is considered to be overthick, and if the measured overall diameter is smaller than the low threshold value, the yarn is considered to be empty.
The conveyor belt 2 plays a role in horizontally conveying the yarn bars, and the yarn bars can horizontally pass through the measuring light curtain at a uniform speed; the measuring light curtain 1 serves to measure the size of the yarn bar and determine the direction of the yarn bar, whether it is a small yarn (bad yarn), and the like.
The conveyor belt carries the horizontal uniform speed of the yarn rod and passes through the measuring device, the measuring device can inform the PLC of whether the yarn rod is in a big head forward or small head forward signal, whether the yarn rod is bad yarn and the like, and the PLC adjusts the big head of the yarn rod to a vertical downward state by utilizing the big head and small head direction adjusting mechanism according to the acquired signal. If the bad yarn PLC is thrown to a bad yarn outlet through a bad yarn removing mechanism.
The measuring device is a core component and plays a key role in judging yarn type and direction, so a light curtain size head measuring device is specially developed. The system is designed to use a measuring light curtain as a measuring component in consideration of cost and actual precision requirements, and the vast majority of light curtain optical axis spacing in the current market is defined to be 5mm due to the limitation of a light curtain optical axis manufacturing process layout. The system adopts a measuring grating with finer optical axis spacing as a measuring component.
In order to obtain higher working efficiency, the system adopts a through type measurement mode, and the measurement efficiency is high because the yarn rod is not stagnated on the conveyor belt. And continuously measuring a plurality of groups of section sizes of the yarn rod under the uniform motion state of the tested yarn rod, comprehensively processing the acquired section sizes to obtain the size head information of the yarn rod, and simultaneously calculating whether the yarn rod is a normal usable yarn rod or bad yarn according to the length information, the diameter information and the like of the yarn rod.
The details are as follows:
the method comprises the steps of firstly establishing a stable high-speed communication period by utilizing a singlechip and a measuring light curtain, taking the communication period as a measuring beat, and acquiring the number of optical axis light points shielded by an object passing through the light curtain once after each communication. The single chip microcomputer calculates the size of an object passing through the light curtain at present according to the number of the shielded light spots, and the light curtain is not shielded by the light when no object passes through.
When the yarn rod passes through the light curtain at a constant speed, the single chip can acquire a plurality of groups of shielding data and form an array. Since the communication period is fixed, the array length can be approximately considered as the length of the yarn bar, and the values of the array elements are the diameter sizes of the different sections.
If the length of the array exceeds the high threshold, the array is considered to be overlong (bad yarn), if the length of the array is less than the low threshold, the array is considered to be foreign (bad yarn), if the measured diameter exceeds the high threshold, the yarn is considered to be overthick (bad yarn), and if the measured overall diameter is less than the low threshold, the array is considered to be empty (bad yarn).
Under normal conditions, the size heads of the yarn bars can be compared according to the first and the last element values of the array, but because the yarn bars are different in length, the size ends of some yarn bars are close in size, the angles of the yarn bars with different diameters and shapes passing through the light curtain are different, and the measuring precision of the light curtain is low and is easily interfered by the reflection of external objects, the error rate of the result obtained by the method of comparing the first and the last elements is very high. False judgment of the size head of the yarn rod often occurs. The following improvements are made on the basis, and three judging methods are adopted at the same time: (1) comparing the first element and the last element of the array; (2) Grouping the obtained arrays appropriately, carrying out average value operation on each group, and comparing the first group and the last group of the grouping; (3) And comparing the size of the head element of the array with the standard size of the big head of the yarn rod, voting the results of the three judging methods, and judging that the size is large if more than two of the 3 results are judged to be big heads, otherwise, judging that the size is small.
The accuracy of judgment is obviously improved by comparing the algorithm, but the low-probability misjudgment caused by measurement interference still cannot be solved, the main reason of misjudgment is that the measurement accuracy is low, the reference dimension of the large head and the small head can change along with the change of the installation position of the measurement light curtain, and the measurement light curtain can influence the measurement accuracy along with the change of the color reflection degree of the yarn rod. The lengths and the diameters of the big and small heads of different varieties of yarn bars are different, an adaptive length algorithm and an adaptive big and small head reference size algorithm are specially introduced for adapting to multi-variety measurement without setting the big and small head reference size, and a program can automatically and iteratively update the values of the reference size and the reference length size of the big and small heads according to past data. According to the iterative reference size, whether the object passing through the measuring light curtain is foreign matter, yarn overlapping, interference and the like can be judged, and the ultra-long yarn and the tailing yarn can be judged. Overlength yarn (Oversized yarn): meaning that the linear density of a portion of the yarn exceeds a predetermined requirement during spinning for various reasons. This may be caused by uneven yarn thickness, malfunction of the spinning machine, or misoperation. Overlength yarns can affect the quality of the fabric and the proper functioning of the textile machinery. Trailing yarn (Trail yarn): refers to the end residue yarn produced by the yarn not being completely cut during spinning. During the operation of the spinning machine, if the yarn is not completely cut or is not treated in time after being broken, the residual yarn is caused to fly out to form tailing yarn in the weaving process. The tailing yarn affects the smoothness, uniformity and appearance quality of the fabric. As shown in fig. 1, the singlechip communicates with the measuring light curtain to obtain measuring data, the diameter is calculated by mask filtering, if the diameter is more than 10mm, the data lower than 10mm are regarded as effective data, whether the flat belt (conveyor belt) operates is detected, if not, the step of continuously obtaining the measuring data is returned, if so, the collecting diameter is pressed into an array A [ ], the step of obtaining the measuring data is returned, and the data lower than 10mm are regarded as ineffective data; if a standard object passes through the light curtain, the data measured in the passing process is always more than 10mm, the data is continuously written into the array during the measuring process, and the index of the array is increased. When the measured value is smaller than 10mm after the object passes, the writing of the array is stopped once the diameter is detected to be smaller than 10mm, whether the length of the array is more than 20 is judged, and if the length of the array is more than 20, something passes before. If <20 indicates that no object has passed before or a short foreign object has passed, no object passes through the clear array operation is performed in preparation for receiving new data. The array length is defined to be >20, on the one hand because the small number of data acquired represents a very short length of the object passing through the light curtain, being invalid data. The decision criteria is designed to be 20 because 20 packets of data are needed later and if less than 20 packets later cannot be done. A [ ] arrays represent the original acquired data arrays; 20 groups of the A </SUB > arrays are subjected to average calculation to obtain A20 arrays, wherein A20 </SUB > is a new array obtained by taking the average value in the groups after the data 20 groups are taken; comparing A20[0] and A20[20] to vote, if the self-adaptive base is satisfied, updating the self-adaptive threshold, and then carrying out self-adaptive size judgment voting, wherein the self-adaptive base is the quantity of the lowest deadline data which satisfies the starting self-adaptive calculation. The method mainly comprises the steps that basic data are not available when the machine is started for the first time, and the data need to be filled first. And voting the first and last data of the A </u > array, carrying out comprehensive judgment, outputting signals comprehensively, returning to the step of acquiring the measurement data, and if the self-adaptive base is not satisfied, carrying out comprehensive judgment.
Claims (4)
1. The method for automatically judging the state of the yarn rod is characterized by comprising the following steps of: the method comprises the following steps: the method comprises the steps that a communication period is established by the singlechip and a measuring light curtain, the communication period is used as a measurement beat, the number of optical axis light points shielded by a yarn rod passing through the light curtain at one time is obtained once in each communication, the singlechip calculates the size of an object passing through the light curtain at one time through the shielded number of light points, when the yarn rod passes through the light curtain on a conveyor belt at a constant speed, the singlechip acquires multiple groups of shielding data and forms an array, the length of the array can be approximately regarded as the length of the yarn rod, the values of the array elements are the diameter sizes of different sections, and meanwhile, the following three judgment methods are adopted to judge the state of the yarn rod: (1) comparing the first element and the last element of the array; (2) Grouping the obtained arrays appropriately, carrying out average value operation on each group, and comparing the first group and the last group of the grouping; (3) And comparing the size of the head element of the group with the big head reference size of the yarn rod, voting the results of the three judging methods, and obtaining the final result with the largest number of votes as the big head final result.
2. The method for automatically judging the state of a yarn bar according to claim 1, wherein: and the big end reference size of the yarn rod, the reference length of the yarn rod, the length high threshold value, the length low threshold value, the diameter high threshold value and the diameter low threshold value are iteratively updated through an adaptive algorithm.
3. An apparatus for use in a method for automatically determining the status of a yarn bar according to any one of claims 1-2, characterized in that: comprising the following steps: the yarn rod measuring device comprises a single chip microcomputer, a measuring light curtain (1), a conveyor belt (2) and yarn rods (3), wherein the yarn rods are arranged on the conveyor belt, the measuring light curtain is used for measuring the yarn rods on two sides of the conveyor belt, and the single chip microcomputer is connected with the measuring light curtain through signals.
4. A device for use in the method of automatically determining the status of a yarn bar as claimed in claim 3, wherein: the measuring component of the measuring light curtain is a measuring grating.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311526276.9A CN117663984A (en) | 2023-11-16 | 2023-11-16 | Method for automatically judging state of yarn rod and device used by same |
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| CN202311526276.9A CN117663984A (en) | 2023-11-16 | 2023-11-16 | Method for automatically judging state of yarn rod and device used by same |
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| CN202311526276.9A Pending CN117663984A (en) | 2023-11-16 | 2023-11-16 | Method for automatically judging state of yarn rod and device used by same |
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