JP2001123364A - Method and apparatus for calculating feeling of knit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for calculating a feeling of a knit by which a yarn diameter of a knitting yarn and/or a loop length of a stitch can be readily calculated from the knit, and further to provide an apparatus therefor. SOLUTION: The knit is pulled in the wale direction till the knitting yarn composing the before course loop and the after course loop of the knit are brought into contact with each other in the course direction, and the size in the course direction is not changed, and the size of the stitch in the course direction in the state of the knit is measured. The value of 1/4 of the obtained size of the stitch is determined as the objective diameter of the yarn of the knitting yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for calculating a texture of a knitted fabric from a knitted fabric, and particularly to a calculation of a yarn diameter of a knitting yarn and a loop length of a stitch in the knitted fabric.

[0002]

2. Description of the Related Art The texture of a knitted fabric knitted by a knitting machine is determined by the gauge number of the knitting machine, the yarn diameter of the knitting yarn, the loop length of the stitch, and the material of the yarn. When determining the texture of the knitted fabric to be knitted, if there is any known data such as the number of gauges, loop length, and yarn diameter of the knitting yarn, such as a previously prepared knitted fabric sample, the data is used as the basis. A knitted fabric having a desired texture can be knitted.

However, if the knitted fabric to be referred to when determining the texture of the knitted fabric is not a knitted fabric sample, a knitted fabric having a texture similar to that of the knitted fabric is to be knitted based on past experience. It is necessary to imagine the texture data, or to use a scale or the like to measure the yarn diameter of the knitting yarn in the knitted fabric, the loop length of the stitch, and the like.

First, as a conventional method for obtaining the yarn diameter d of a knitting yarn, as shown in FIG. 10, a knitting yarn 100 to be measured is wound around a suitable round bar 102 or the like in a state in which the yarns are in close contact with each other without leaving a gap therebetween. There is a method of dividing the winding width 1 of the knitting yarn 100 by the number of turns n of the knitting yarn 100. Another method of determining the yarn diameter of a knitting yarn is to arrange several knitting yarns to be measured, twist and compress them, measure the diameter of an appropriate location, and adjust the value to obtain the number of knitting yarns. There is also a method of dividing by.

A method for measuring the loop length of a stitch is to cut a knitting yarn from a knitted fabric at a predetermined number of stitches, apply a suitable load to the cut knitting yarn, measure the length, and measure the length. There is a way to divide the value by the number of stitches.

[0006]

However, in the above-described method for measuring the yarn diameter of a knitting yarn, the change in the force for winding the knitting yarn around a round bar or the change in the force for twisting a plurality of aligned knitting yarns is difficult. Numerical values fluctuate due to changes in the balance of compression and the like, and it is difficult to obtain an accurate yarn diameter. Also,
The method of measuring the loop length of the stitch described above also requires time and effort, and furthermore, the knitting yarn must be cut off from the knitted fabric.

Accordingly, the present invention solves the above-mentioned problems of the prior art, and provides a method and apparatus for calculating the texture of a knitted fabric capable of easily obtaining the yarn diameter and / or loop length of a knitted yarn from the knitted fabric. The purpose is to do.

[0008]

According to the present invention, the knitting yarns constituting the former loop and the latter loop of the knitted fabric come into contact with each other in the course direction, and the knitting of the knitted fabric in the course direction no longer changes. The fabric is pulled in the wale direction, the size of the stitch in the course direction in the state of the knitted fabric is determined, and a value of a quarter of the determined size of the stitch is used as the yarn diameter of the knitting yarn.

The present invention also relates to a knitting fabric in the wale direction until the knitting yarns forming the first and second loops of the knitted fabric contact each other in the course direction and the dimension of the knitted fabric in the course direction does not change. Then, the size of the stitch in the course direction and the size of the stitch in the wale direction in the state of the knitted fabric are obtained, and the size of the stitch in the course direction is calculated as 4 times.
The method is characterized in that the value of the half is defined as the yarn diameter of the knitting yarn, and the loop length of the stitch in the knitted fabric is calculated using the yarn diameter of the knitting yarn and the size of the stitch in the wale direction.

[0010] The present invention also relates to a pulling means for pulling a knitted fabric in a wale direction, an image input means for inputting an image of the knitted fabric drawn by the pulling means, and a course direction of the knitted fabric in a pulled state. The processing direction means for determining the size in the course direction of the knitting yarn of the knitted yarn image and the size in the course direction of the input knitted fabric image and the number of stitches included in the size in the course direction of each knitting yarn in contact with It is characterized by having been provided.

[0011] The present invention also relates to a pulling means for pulling a knitted fabric in a wale direction, and the knitting yarns constituting a former-stage loop and a latter-stage loop of the knitted fabric contact each other in a course direction by the pulling means. Image input means for inputting an image of a stable area in a knitted fabric pulled until the dimension of the knitted fabric in the direction no longer changes, and determining the size of a stitch in the course direction of the knitted fabric from the input knitted fabric image; And an arithmetic processing means for setting a value of a quarter of the size of the stitch to a yarn diameter of the knitting yarn.

Preferably, the arithmetic processing means obtains the size of the stitch in the wale direction of the knitted fabric from the knitted fabric image input by the image input means, and calculates the yarn diameter of the knitting yarn and the size of the stitch in the wale direction. Is used to calculate the loop length of the stitch in the knitted fabric.

[0013]

According to the first aspect of the present invention, the knitting yarns constituting the first and second loops of the knitted fabric contact each other in the course direction, and the size of the knitted fabric in the course direction does not change. Pull the knitted fabric in the wale direction.
Then, the size of the stitch in the course direction in the state of the knitted fabric is obtained, and the obtained size of the stitch is divided by 4 to obtain
The yarn diameter of the knitting yarn can be easily calculated.

According to the second aspect of the present invention, the knitted fabric constituting the first loop and the second loop of the knitted fabric comes into contact with each other in the course direction, and the knitted fabric is wale until the dimension of the knitted fabric in the course direction does not change. Pull in the direction. And
The size of the stitch in the course direction in the state of this knitted fabric,
By calculating the size of the stitch in the wale direction, the yarn diameter of the knitting yarn and the loop length of the stitch can be calculated.

According to the third aspect of the present invention, the knitted fabric is pulled by the pulling means, and an image of the pulled knitted fabric is input by the image input means. The size in the course direction of each knitting yarn in contact with the course direction of the knitted fabric in the stitched state is defined as the yarn diameter of the knitting yarn. Calculate based on numbers. Thereby, the yarn diameter of the knitting yarn can be easily obtained.

According to the fourth aspect of the present invention, the knitted fabric is pulled by the pulling means, and the knitting yarns constituting the former loop and the latter loop of the knitted fabric contact each other in the course direction, and
The image of the stable region in the knitted fabric drawn in the wale direction is input by the image input means until the dimensions of the knitted fabric in the course direction no longer change. Then, from the input knitted fabric image, the arithmetic processing means calculates the size of the stitch in the course direction of the knitted fabric,
By dividing the obtained stitch size by 4, the yarn diameter of the knitting yarn can be easily calculated.

According to the fifth aspect of the present invention, the arithmetic processing means determines the size of the stitch in the wale direction of the knitted fabric from the knitted fabric image input by the image input means. Then, the loop length of the stitch can be obtained using the yarn diameter of the knitting yarn and the size of the stitch in the wale direction.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a state in which a knitted fabric 1 for calculating a yarn diameter d of a knitting yarn and a loop length L of a stitch is pulled in a wale direction. In the present embodiment, it is assumed that the knitted fabric 1 has regular stitches which are stitched.

When knitting a knitted fabric with a flat knitting machine, a knitting yarn is supplied to a knitting needle housed in a needle bed so as to be able to advance and retreat by a yarn carrier which is carried by a carriage which slides on a needle bed (not shown). . The supplied knitting needle is pulled down by a stitch provided on the carriage, and the knitting yarn forms a stitch. The knitting yarn at the time of forming the stitch is in a stretched state. The stitches shrink after being knitted, and the knitted fabric is in a relaxed state. The feature of the knitted fabric is its elasticity. This is due to the structure in which the unique stitches are connected vertically and horizontally and the expansion and contraction of the knitting yarn. However, it is difficult to obtain the yarn diameter of the knitting yarn and the loop length of the stitch in the knitted fabric from the knitted fabric in the relaxed state because of the elasticity characteristic of the knitted fabric.

In the present embodiment, as shown in FIG. 1, even when the knitted fabric 1 is pulled in the wale direction, the knitted yarn 2 has a yarn diameter d of the knitting yarn 2 in a state where the knitted fabric dimension in the course direction does not change (hereinafter referred to as critical). And the loop length L of the stitch are obtained. When the knitted fabric 1 in the relaxed state is pulled in the wale direction, the knitting yarns forming the former loop and the latter loop come into contact with each other in the course direction. Then, the stitches at both ends of the knitted fabric move toward the center of the knitted fabric 1, and the dimension w of the knitted fabric 1 in the course direction becomes shorter. And after pulling the knitted fabric 1 to some extent,
The dimension of the knitted fabric 1 in the course direction does not change and becomes stable. This is a state where the knitted fabric 1 is pulled to the critical level. Further, when the knitted fabric 1 is further pulled, the knitting yarn 2 exceeds the limit of elongation, and cannot be restored to the original state, and eventually the knitting yarn 2 is cut.

In FIG. 1, reference numeral 4 denotes a stable area in the knitted fabric 1. The stable area 4 is an area where the stitch (knitting yarn) is reliably drawn to a critical level. FIG. 2 is a partially enlarged view of the stable region 4. As can be seen from the loop diagram of FIG. 2, in a state where the knitted fabric 1 is pulled to the critical level in the wale direction,
The knitting yarns forming the knitted fabric front loop 6 and the rear loop 8 are in contact with each other in the course direction, and the size e of the stitch 10 in the course direction is equal to four yarn diameters d of the knitting yarn 2. In other words, a quarter of the size e of the stitch 10 in the course direction
Is the yarn diameter d of the knitting yarn 2. Also, if the size c of the stitch 10 in the wale direction described later is known, the loop length L of the stitch 10 can be obtained from the above-mentioned yarn diameter d of the stitch 10 by the following equation (1).
Can be calculated. Since the former loop 6 and the latter loop 8 partially overlap to form the stitch 10, the loop size f of the stitch 10 in the actual wale direction is used.
Is a value obtained by adding three thread diameters d to the size c of the stitch 10.

[0022]

(Equation 1)

Expression 1 is simply described with reference to the stitch schematic diagram of FIG. In addition, 11 in FIG. 3 is a center line of the knitting yarn 2. Assuming that the stitch 10 is bilaterally symmetric, the stitch 10 is divided right and left at the center axis, and either left or right is considered first. One of the divided stitches 10 has two straight lines a1-a2, a5-a of length d / 2 located above and below the stitch 10
6 and two arcs a2-a whose circumference is 1/4 of 2πd
3, a4-a5, and a straight line a3-a4 having a square root of (c ² + d ² ) connecting these arcs. And twice the sum of these lengths is the loop length L of the stitch 10 in the knitted fabric 1.

However, in the above equation (1), detailed calculations are omitted, and this is an equation for calculating the loop length L of the stitch 10 by a simple calculation. If it is necessary to calculate the loop length with higher accuracy, the following formula 2 may be used. Equation 2 is used to smooth the connection between the straight line and the arc in the loop diagram in FIG. 3 so that the loop length can be calculated more accurately.

[0025]

(Equation 2)

Two methods for calculating the size e of the stitch 10 in the course direction and the size c of the stitch in the wale direction used in the calculation formula for calculating the loop length L of the stitch 10 will be described. 1
First, while the knitted fabric 1 is pulled to the critical level in the wale direction, the number of the stitches 10 is counted per predetermined length, for example, within 20 cm. Then, the predetermined length is divided by the number of the stitches 10 to obtain the sizes c and e of the stitches 10. Second, the length of each of a predetermined number of stitches, for example, 20 stitches, is measured while the knitted fabric 1 is pulled to the critical level in the wale direction. Then, the size c, e of the stitch 10 is obtained by dividing the length of the predetermined number of stitches by the number of stitches. By the method as described above, the size e of the stitch 10 in the course direction and the size c of the stitch 10 in the wale direction in a state where the knitted fabric 1 is pulled to the critical level in the wale direction can be easily obtained.

Next, a description will be given of a texture calculating device 12 of the knitted fabric 1, which is another embodiment of the present invention. This is an apparatus that can automatically measure the calculation of the texture of the knitted fabric 1 described above. FIG. 4 is a schematic diagram of the system configuration of the texture calculation device 12 of the knitted fabric according to the present invention, and FIG. 5 is a block diagram of the texture calculation device 12 of the present invention. 14 is a texture calculation unit main body, 16 is a CRT, 18 is a drawer for drawing a knitted fabric, 20 is a CCD camera for inputting an image of the knitted fabric drawn by the drawer, and 22 is the back side of the knitted fabric. Reference numeral 24 denotes a stand on which a CCD camera is mounted.

The knitted fabric 1 to be measured is creased by the creaser 18 above the light table 22. Drawer 18
Pulls the knitted fabric 1 to be measured to a critical level in the wale direction as shown in FIG. At this time, illumination light is applied from the back side of the knitted fabric 1 by the light table 22, and the stitches 10 and the stitches 1 in the stable region 4 of the knitted fabric 1 by the CCD camera 20.
The transmitted light from 0 is input as a knitted fabric image 26 as shown in FIG. For determining whether the knitted fabric 1 has been pulled to the criticality, for example, the amount of displacement in the course direction at the side end of the knitted fabric 1 to be creased is detected or measured, and the displacement of the knitted fabric side end in the course direction is detected. And the stable knitted fabric 1 is drawn to the criticality. The measurement of the amount of movement of the knitted fabric side end may be performed using a knitted fabric image input by the CCD camera 20 or may be performed visually. If it is known in advance how much tension should be used to pull the knitted fabric 1, the knitted fabric 1 will be pulled to the critical state. It does not matter.

When a knitted fabric image is input by the CCD camera 20, the amount of light from the light table 22 changes depending on the color of the knitted fabric 1. In order to make this constant, the CCD camera 20 includes an auto iris (automatic iris). It is better to have the function of ()). Further, since the distance between the surface of the knitted fabric 1 and the CCD camera 20 changes depending on the thickness of the knitted fabric 1, the distance change due to the thickness of the knitted fabric 1 is corrected and an image is clearly captured. It is better to have an auto focus function.

The texture calculation unit main body 14 includes a CPU 28 that performs various data processing, and a ROM 3 that stores various programs.
0, a RAM having a readable and writable working memory 32, an I / O device 36, a bus 38, and other computers. The I / O device 36 includes a CCD camera 20 for inputting the knitted fabric image 26, a keyboard 40 for inputting various instructions and data input, and an external storage of a drive such as a CRT 16, a floppy disk or a magneto-optical disk. Means 42 are connected.

Using the ROM 30 and the like of the texture calculation unit main body 14, an arithmetic processing means 44 described later is formed, and the CPU 28
Do the job with the help of. The arithmetic processing means 44 can be realized not only as a program but also as a dedicated IC such as a digital signal processor. The RAM 34 stores data obtained by processing by the CPU 28 using means and programs provided in the ROM 30. Here, there is a storage area for each area, and in addition to a knitted image storage area 46 for storing the knitted image 26 inputted by the CCD camera 20 or the like, each stitch position coordinate calculated by the arithmetic processing means 44 is stored. There is a stitch position coordinate storage area 48 to be stored. Instead, it may be stored in a floppy or the like of the external storage means 42.

Next, the processing by the knitted fabric texture calculating device 12 of the present invention will be described with reference to the flowchart of FIG. FIG. 8 is an enlarged view of FIG.
Here, the color of the knitting yarn 2 is omitted for easy understanding. FIG. 9 is a diagram showing the sorting state of the X coordinate values of each stitch.

First, the process is started in step s1, and in step s2, the knitted fabric 1 is pulled to a critical level in the wale direction by the drawer 18. In step s3, the light table 22 illuminates the back side of the knitted fabric 1 pulled by the drawer 18 with illumination light, and inputs the knitted fabric image 26 in the stable area 4 of the knitted fabric 1 with the CCD camera 20. In the present embodiment, image input is performed on the knitted fabric 5 at the center of the stable area 4 of the knitted fabric 1. In step s4, the processing by the arithmetic processing means 44 is performed. Arithmetic processing means 44
In the knitted fabric 1 creased by the creaser 18,
The size of the knitting yarn 2 in the course direction of each knitting yarn in contact with the knitting fabric 1 in the course direction is defined as the yarn diameter d of the knitting yarn 2. Yarn diameter d of the knitting yarn 2
Is determined based on the course direction size x of the knitted fabric image 26 input in step s3 and the number of stitches 10 included therein. In the present embodiment, the arithmetic processing means 44
Is a knitted fabric image 2 input by the CCD camera 20 first.
From 6, the position of each stitch 10 is detected. As shown in FIG. 8, the minimum value and the maximum value of the X coordinate and the Y coordinate of the detected hole portion 50 of each stitch 10 are obtained, and the intersection of the intermediate lines 52 and 54 is set to the pole center 56. And these coordinates are used as stitch positions. The values of the detected X coordinate and Y coordinate of each stitch 10 are sorted. FIG. 9 is a graph in which the detected X coordinates of each stitch 10 are sorted, where the X axis is the X coordinate of the stitch position and the Y axis is the number of stitches 10. As the value on the X axis increases, the stitch 10 on the Y axis
Are accumulated. Then, the number of change points 58 indicating a change amount equal to or more than a certain reference is extracted and the number thereof is counted, whereby the number of the X-axis stitches 10 in a certain length can be found. Next, by dividing the fixed length by the number of stitches 10,
The size e of the stitch 10 in the course direction can be calculated. The same processing is performed for the Y coordinate of each stitch 10 detected,
The size c of the stitch 10 in the wale direction is calculated.

In this way, the size e of the stitch 10 in the course direction is calculated, and by dividing this value e by 4, the yarn diameter d of the knitting yarn 2 is obtained. The thread diameter d and the stitch 1 in the wale direction
The loop length L of the stitch 10 is calculated from the size c of 0.
The loop length of the stitch 10 can be easily calculated by using an equation such as Equation 1 or Equation 2 described above. Then, the process proceeds to step s5, and the processing for calculating the texture ends.

As described above, according to the present invention, the yarn diameter d of the knitting yarn 2 and / or the loop length L of the stitch 10 can be easily calculated from the knitted fabric 1, and the texture of the knitted fabric 1 can be easily sensed. From things, they can be expressed numerically.

In this embodiment, the yarn diameter d of the knitting yarn 2 is
Is a value of コ ー ス of the size of the stitch in the course direction in the knitted fabric 1 drawn to the criticality in the wale direction. However, since the cross-sectional shape of the knitting yarn 2 in contact with the course direction of the knitted fabric 1 changes depending on the type of knitting yarn, a coefficient K for correcting the yarn diameter d of the knitting yarn 2 is set for each type of knitting yarn. You may.

In the present embodiment, the stitch position is set to the pole center 56 of the stitch 10;
, The contour of the stitch 10 is extracted, the center of gravity is determined from the extracted contour of the stitch 10, and the center of gravity may be used as the stitch position. Further, instead of the size of the stitch 10 used when obtaining the yarn diameter d and / or the loop length L of the stitch 10,
The interval between two adjacent stitches may be calculated from the stitch position coordinates of the two stitches, and these values may be used.

In this embodiment, the CCD camera 20 is used as the image input means, but it may be a scanner or the like. Further, the arithmetic processing unit 44 in the present embodiment calculates the size of the stitch 10 by detecting the position of each stitch from the hole 50 of the stitch 10 of the knitted fabric image 26 input by the image input unit. Alternatively, the size of the stitch may be calculated by performing image processing such as pattern matching and measuring the number of stitches in a predetermined length, or measuring the length in a predetermined number of stitches.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and can be implemented without departing from the gist of the present invention.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state in which a knitted fabric is pulled to a critical level in a wale direction according to an embodiment of the present invention.

FIG. 2 is an enlarged loop diagram of a stable region of FIG. 1;

FIG. 3 is a schematic diagram of a stitch in FIG. 2;

FIG. 4 is a schematic diagram of a system configuration of a texture calculating device according to the present invention.

FIG. 5 is a block diagram of a texture calculation device.

FIG. 6 is a knitted fabric image input by an input unit.

FIG. 7 is a flowchart of a texture calculation process.

8 is a partially enlarged view of the knitted fabric image in FIG.

FIG. 9 is a diagram showing a state where the X coordinate of each stitch is sorted.

FIG. 10 is a diagram showing a conventional yarn diameter calculation method.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 knitted fabric 2 knitting yarn 4 stable area 6 front loop 8 back loop 10 stitch 11 knitting yarn center line 12 texture calculation device 14 texture calculation unit main body 18 pulling machine 20 CCD camera 22 light table 26 knitted fabric image 50 stitch hole 56 pole center 58 change point c stitch size in wale direction e stitch size in course direction d thread diameter of knitting yarn L loop length of stitch w knitted fabric size in course direction

Claims (5)

[Claims] 1. A knitting yarn constituting a first-stage loop and a second-stage loop of a knitted fabric is in contact with each other in a course direction, and
The knitted fabric is pulled in the wale direction until the dimensions of the knitted fabric in the course direction no longer change, the size of the knitted stitches in the course direction in the state of the knitted fabric is determined, and the value of the quarter of the determined size of the stitches is knitted. A method for calculating the texture of a knitted fabric, characterized by using the yarn diameter of the yarn. 2. Knitting yarns constituting a former loop and a latter loop of a knitted fabric are in contact with each other in a course direction, and
The knitted fabric is pulled in the wale direction until the dimension of the knitted fabric in the course direction no longer changes, and the size of the stitch in the course direction and the size of the stitch in the wale direction in the state of the knitted fabric are determined. A value of a quarter of the size is defined as the yarn diameter of the knitting yarn, and the loop length of the knitted fabric in the knitted fabric is calculated using the yarn diameter of the knitting yarn and the size of the stitch in the wale direction. Knitted fabric texture calculation method. 3. A knitting means for pulling a knitted fabric in a wale direction; an image input means for inputting an image of the knitted fabric drawn by the knitting means; Calculation processing means for determining the size of each knitting yarn in the course direction as the yarn diameter of the knitting yarn, and calculating the knitting yarn based on the size of the input knitted fabric image in the course direction and the number of stitches included therein. A texture calculation device for a knitted fabric. 4. A pulling means for pulling a knitted fabric in a wale direction;
The knitting yarns constituting the former loop and the latter loop of the knitted fabric contact each other in the course direction by the pulling means,
And image input means for inputting an image of a stable region in the knitted fabric pulled until the dimensions of the knitted fabric in the course direction no longer change, and determining the size of the stitches of the knitted fabric in the course direction from the input knitted fabric image. And a calculation processing means for setting a value of a quarter of the obtained size of the stitch to a yarn diameter of the knitting yarn. 5. The arithmetic processing means obtains the size of a stitch in the wale direction of the knitted fabric from the knitted fabric image input by the image input means, and calculates the yarn diameter of the knitting yarn and the size of the stitch in the wale direction. The knitted fabric texture calculating device according to claim 4, wherein the knitted fabric loop length is calculated using the loop length.