CN110646352A - Method for identifying different-color spun yarn bobbin - Google Patents
Method for identifying different-color spun yarn bobbin Download PDFInfo
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- CN110646352A CN110646352A CN201910993673.4A CN201910993673A CN110646352A CN 110646352 A CN110646352 A CN 110646352A CN 201910993673 A CN201910993673 A CN 201910993673A CN 110646352 A CN110646352 A CN 110646352A
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Abstract
The invention belongs to the technical field of automatic detection of textiles, and particularly relates to a method for identifying a yarn tube of a different-color spun yarn, which comprises the following steps: the first step is as follows: when the bobbin passes through the tray track and is positioned in the bobbin identification system, the color sensor of the bobbin identification system acquires the color information of the current spun yarn bobbin, and the light intensity sensor acquires the ambient illumination condition at the moment and transmits a signal to the microcontroller of the bobbin identification system; the second step is that: and the microcontroller identifies and analyzes the collected color information, judges whether the current bobbin is a different-color bobbin, sends out a warning signal if the current bobbin is the different-color bobbin, and continues the first step if the current bobbin is not the different-color bobbin. The invention can support the coordination working scheme of a single or a plurality of color sensors, overcomes the interference of external light, and improves the robustness, flexibility and intellectualization of the color identification of the different-color spun yarn bobbin; the invention has low cost and easy maintenance, can realize the function of online monitoring on the transportation track of the spun yarn bobbin, and improves the automation degree of the winding process.
Description
Technical Field
The invention belongs to the technical field of automatic detection of spinning, and particularly relates to a method for identifying a yarn bobbin of a different-color spun yarn.
Background
In the field of textile yarn processing, yarns spun by a spinning machine usually adopt different colors, so that different yarn products can be quickly distinguished by a vehicle stopper. With the development of automation and continuity of spinning processes, yarns spun by spinning frames are subjected to full-automatic collective doffing and are automatically conveyed to a spooling process by a tray rail for spooling. However, the number of bobbins involved in the winding process is large, and bobbins having different colors, i.e., different color bobbins, are easily mixed. Because the different-color bobbins represent different yarn varieties, if the different-color bobbins are not found in time, the yarns of the different-color bobbins can be wound into the cheese, the final finished fabric is unqualified directly, and a large amount of loss is caused. The current heterochromatic bobbins all adopt manual detection, and have the problems of high labor intensity, low efficiency, omission and the like. Therefore, the bobbin color automatic identification device capable of being on-line, high in efficiency and high in accuracy is developed, the labor cost can be reduced, the consistency of the detection efficiency and the product quality is improved, and the bobbin color automatic identification device has important engineering practical significance.
Disclosure of Invention
The invention aims to solve the problems of high labor intensity, low precision and the like of manual bobbin identification, and provides a method for identifying a different-color spun yarn bobbin, which can accurately realize the detection of the color of the bobbin, improve the production efficiency, save the labor cost and have a wide application range.
The technical scheme of the invention is as follows:
the bobbin identification system comprises a color sensor, a light intensity sensor and a microcontroller. The light intensity sensor acquires the current spun yarn bobbin light intensity information passing through the system, the color sensor is used for acquiring the color of the spun yarn bobbin passing through the system, and the microcontroller is used for collecting the information of the color sensor and the light intensity sensor and identifying and analyzing the color value. The color sensors can be simultaneously installed in N numbers, so that the color information of the N bobbins can be simultaneously obtained, and N is more than or equal to 2.
Further, the color sensor is a color CCD sensor or a color CMOS sensor or an RGB color sensor; the microcontroller is a single chip microcomputer or an industrial personal computer.
A method for identifying a yarn tube of a different-color spun yarn comprises the following steps:
the first step is as follows: when the bobbin passes through the tray track and is positioned in the bobbin identification system, the color sensor of the bobbin identification system acquires the color information of the current spun yarn bobbin, and the light intensity sensor acquires the ambient illumination condition at the moment and transmits a signal to the microcontroller of the bobbin identification system;
the second step is that: and the microcontroller identifies and analyzes the collected color information, judges whether the current bobbin is a different-color bobbin, sends out a warning signal if the current bobbin is the different-color bobbin, and continues the first step if the current bobbin is not the different-color bobbin.
Further, the identification and analysis in the second step specifically comprises the following steps:
2.1 calibration stage:
2.1.1, acquiring color information of N bobbins with the same color by adopting N color sensors at the same time, and analyzing the color information into N CIELAB color space values;
2.1.2 calculating the color difference average value of any one color value and other N-1 color values to obtain N color difference values, and finally averaging the N color differences to obtain the final average color difference value;
2.1.3 repeating the steps 2.2.1 and 2.2.2 under different illumination conditions, and establishing a mapping relation between the output value of the light intensity sensor and the actually obtained chromatic aberration, thereby dynamically giving out a chromatic aberration threshold range according to the field illumination conditions.
2.2 testing stage:
2.2.1 analyze the color information of the N color sensors into N CIELAB color space values, which are expressed as vector Ci＝(L,a,b),1≤i≤N；
2.2.2 adjacent N color values are sequentially subjected to color difference calculation to obtain N-1 color difference values Di；
2.2.3 solving the color difference between the updated color value (if updated) and the N color values one by one to obtain N color difference values Ki；
2.2.4 obtaining a color difference threshold value R according to the output value of the current light intensity sensor, if the color difference value satisfies the expression: cR is less than or equal to DiOr cR is less than or equal to Ki(where c is the sensitivity coefficient and has a value range of [1,3 ]]) Judging that different-color bobbins exist in the current N bobbins; otherwise, calculating and judging that no heterochromatic bobbin exists currently, taking the average value of the colors of the current N bobbins as the updated color value, and continuing to detect.
Further, the color difference may be CIEDE94, CIECMC, CIE 2000.
The invention has the beneficial effects that:
the invention provides a method for identifying a yarn bobbin of a different color spun yarn, which can support a single or multiple color sensors to work coordinately, overcome external light interference, and improve the robustness, flexibility and intellectualization of color identification of the yarn bobbin of the different color spun yarn; the color sensor and the controller of the invention have high integration degree, low cost and easy maintenance, can realize the function of online monitoring on the transportation track of the spun yarn bobbin, improve the automation degree of the winding process, accelerate the working efficiency of detection, save the labor cost and bring remarkable economic benefit.
Drawings
Fig. 1 is a schematic view of a bobbin recognition system of the present invention.
In the figure, 1 yarn body; 2, a ring bobbin head; 3 color sensor and light intensity sensor; 4, a controller.
Detailed Description
In order to more clearly describe the technical contents of the present invention, the following further description is given in conjunction with specific embodiments.
Referring to fig. 1, in the method for identifying the yarn tube of the different-color spun yarn of the invention, the color sensor is a TCS3200RGB color sensor, and the microcontroller is an STM32F103RCT6 single chip microcomputer and a light intensity sensor (model: GY 302).
Example 1: when N is 4 and C is 2, the color difference is CIEDE 94.
A method for identifying a yarn tube of a different-color spun yarn comprises the following steps:
the first step is as follows: when the bobbin passes through the tray track and is positioned in the bobbin identification system, the color sensor of the bobbin identification system acquires the color information of the current spun yarn bobbin, and the light intensity sensor acquires the ambient illumination condition at the moment and transmits a signal to the microcontroller 4 of the bobbin identification system;
the second step is that: and the microcontroller 4 identifies and analyzes the collected color information, judges whether the current bobbin is a different-color bobbin, sends out a warning signal if the current bobbin is the different-color bobbin, and continues the first step if the current bobbin is not the different-color bobbin.
The identification and analysis in the second step comprises the following specific steps:
2.1 calibration stage:
2.1.1, simultaneously acquiring color information of 4 bobbins with the same color by adopting 4 color sensors, and analyzing the color information into 4 CIELAB color space values;
2.1.2 calculating the color difference average value of any one color value and other 3 color values to obtain 4 color difference values, and finally averaging the N color differences to obtain the final average color difference value;
2.1.3 repeating the steps 2.2.1 and 2.2.2 under different illumination conditions, and establishing a mapping relation between the output value of the light intensity sensor and the actually obtained chromatic aberration, thereby dynamically giving out a chromatic aberration threshold range according to the field illumination conditions.
2.2 testing stage:
2.2.1 analyze the color information of 4 color sensors into 4 CIELAB color space values, denoted as vector Ci＝(L,a,b),1≤i≤4；
2.2.2 adjacent 4 color values are sequentially subjected to color difference calculation to obtain 3 color difference values Di；
2.2.3 solving the color difference between the updated color value (if updated) and 4 color values one by one to obtain 4 color difference values Ki；
2.2.4 obtaining a color difference threshold value R according to the output value of the current light intensity sensor, if the color difference value satisfies the expression: cR is less than or equal to DiOr cR is less than or equal to KiIf c is 2, judging that different-color bobbins exist in the current 4 bobbins; otherwise, calculating and judging that no heterochromatic bobbin exists currently, taking the average value of the colors of the current 4 bobbins as the updated color value, and continuing to detect.
TABLE 1
As shown in table 1, the difference value of the different-color bobbins is significantly greater than the set threshold, which indicates that the method provided by the present invention can effectively identify the different-color bobbins.
Example 2: when N is 7 and C is 3, the color difference is CIE 2000.
A method for identifying a yarn tube of a different-color spun yarn comprises the following steps:
the first step is as follows: when the bobbin passes through the tray track and is positioned in the bobbin identification system, the color sensor of the bobbin identification system acquires the color information of the current spun yarn bobbin, and the light intensity sensor acquires the ambient illumination condition at the moment and transmits a signal to the microcontroller 4 of the bobbin identification system;
the second step is that: and the microcontroller 4 identifies and analyzes the collected color information, judges whether the current bobbin is a different-color bobbin, sends out a warning signal if the current bobbin is the different-color bobbin, and continues the first step if the current bobbin is not the different-color bobbin.
The identification and analysis in the second step comprises the following specific steps:
2.1 calibration stage:
2.1.1, adopting 7 color sensors to simultaneously acquire color information of 7 bobbins with the same color, and analyzing the color information into 7 CIELAB color space values;
2.1.2 calculating the color difference average value of any one color value and other 6 color values, obtaining 7 color difference values, and finally averaging the 7 color differences to obtain the final average color difference value;
2.1.3 repeating the steps 2.2.1 and 2.2.2 under different illumination conditions, and establishing a mapping relation between the output value of the light intensity sensor and the actually obtained chromatic aberration, thereby dynamically giving out a chromatic aberration threshold range according to the field illumination conditions.
2.2 testing stage:
2.2.1 analyze the color information of the 7 color sensors into 7 CIELAB color space values, which are denoted as vector Ci＝(L,a,b),1≤i≤7；
2.2.2 adjacent 7 color values are sequentially subjected to color difference calculation to obtain 6 color difference values Di；
2.2.3 after updateThe color difference is solved one by one between the color value and 7 color values to obtain 7 color difference values Ki；
2.2.4 obtaining a color difference threshold value R according to the output value of the current light intensity sensor, if the color difference value satisfies the expression: cR is less than or equal to DiOr cR is less than or equal to KiIf c is 3, judging that different-color bobbins exist in the current 7 bobbins; otherwise, calculating and judging that no heterochromatic bobbin exists currently, taking the average value of the colors of the current 7 bobbins as the updated color value, and continuing to detect.
TABLE 2
As shown in table 2, the difference value of the different-color bobbins is significantly greater than the set threshold, which indicates that the method provided by the present invention can effectively identify the different-color bobbins.
Claims (4)
1. A method for identifying a yarn tube of a different-color spun yarn is characterized by comprising the following steps:
the first step is as follows: when the bobbin passes through the tray track and is positioned in the bobbin recognition system, the color sensor of the bobbin recognition system acquires the color information of the current spun yarn bobbin, and the light intensity sensor acquires the ambient illumination condition at the moment and transmits a signal to the microcontroller (4) of the bobbin recognition system;
the second step is that: the microcontroller (4) identifies and analyzes the collected color information, judges whether the current bobbin is a different color bobbin, sends out a warning signal if the current bobbin is the different color bobbin, and continues the first step if the current bobbin is not the different color bobbin;
the identification and analysis in the second step comprises the following specific steps:
2.1 calibration stage:
2.1.1, acquiring color information of N bobbins with the same color by adopting N color sensors at the same time, and analyzing the color information into N CIELAB color space values, wherein N is more than or equal to 2;
2.1.2 calculating the color difference average value of any one color value and other N-1 color values to obtain N color difference values, and finally averaging the N color differences to obtain the final average color difference value;
2.1.3 repeating the steps 2.2.1 and 2.2.2 under different illumination conditions, establishing a mapping relation between the output value of the light intensity sensor and the actually obtained chromatic aberration, and further dynamically giving a chromatic aberration threshold range according to the field illumination conditions;
2.2 testing stage:
2.2.1 analyze the color information of the N color sensors into N CIELAB color space values, which are expressed as vector Ci＝(L,a,b),1≤i≤N；
2.2.2 adjacent N color values are sequentially subjected to color difference calculation to obtain N-1 color difference values Di；
2.2.3 solving the color difference between the updated color value and the N color values one by one to obtain N color difference values Ki；
2.2.4 obtaining a color difference threshold value R according to the output value of the current light intensity sensor, if the color difference value satisfies the expression: cR is less than or equal to DiOr cR is less than or equal to KiWherein c is a sensitivity coefficient and has a value range of [1,3 ]]Judging that different-color bobbins exist in the current N bobbins; otherwise, calculating and judging that no heterochromatic bobbin exists currently, taking the average value of the colors of the current N bobbins as the updated color value, and continuing to detect.
2. The method for identifying the yarn tube of the different-color spun yarn as claimed in claim 1, wherein the color difference is one of CIEDE94, CIECMC or CIE 2000.
3. The method for identifying the yarn tube of the different-color spun yarn according to claim 1 or 2, wherein the yarn tube identification system comprises a color sensor, a light intensity sensor (3) and a microcontroller (4); the system comprises a light intensity sensor (3), a color sensor, a microcontroller and a control module, wherein the light intensity sensor (3) acquires light intensity information of a spun yarn bobbin currently passing through the system, the color sensor is used for acquiring the color of the spun yarn bobbin passing through the system, and the microcontroller is used for collecting information of the color sensor and the light intensity sensor and identifying and analyzing color values; the color sensors are simultaneously installed in N numbers, so that the color information of the N bobbins is obtained simultaneously, and N is more than or equal to 2.
4. The method for identifying the yarn tube with the different colors according to claim 3, wherein the color sensor is a color CCD sensor, a color CMOS sensor or an RGB color sensor.
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