KR20210096855A - Fabric pattern precision detection device using reflected light source - Google Patents

Abstract

The present invention relates to a device for precisely detecting a fabric pattern using a reflective light source while shooting at high speed with a camera connected to a computer to check, by using the computer, various errors or faulty factors, such as fabric unevenly knitted in the knitting process on a knitted fabric manufactured from a circular knitting machine, fabric in which a yarn is cut and not supplied, fabric that causes fraying and missing stitches, and fabric with twisted yarn after dyeing in a dyeing machine. A light source body uses a high-brightness LED module, and a through hole is formed in the center of a support plate where the module is located so that reflected light reflected from the fabric can be transmitted through a lens of the camera. One or more high-brightness LED modules are located on the outer periphery around the through hole to be intensively miniaturized. Accordingly, a plurality of light sources can be arranged in parallel even in a narrow space of a vision stand so that a small space can be utilized by using a compact and powerful light source body.

Description

Fabric pattern precision detection device using reflected light source

The present invention relates to a precision detection device used for high-speed inspection of fabric patterns, and the fabrics and yarns that are unevenly knitted in the knitting process on the knitting fabrics manufactured from the circular knitting machine, the yarns are cut and the fabrics are not supplied to the fabrics. In order to inspect with a computer various errors or defect factors, such as fabrics that cause nose bleeds and fabrics that are twisted after dyeing in a dyeing machine, high-speed shooting with a computer-connected camera and precise fabric pattern using a reflective light source It relates to the detection device.

First, looking at the prior art,

Until now, textile fabric producers have been using a weft-straightener using a light transmission slit to correct the distorted weft of the woven fabric.

However, at present, the proportion of production of knitted fabrics is increasing, and the production of functional fabrics such as curtains or car seats to which various patterns are applied or fabrics that emphasize health is on the rise.

These newly emerged fabrics have various patterns of fabric texture, so the existing optical transmission slit-type weft straighteners (representative companies --> German companies: Mahlo, Italian companies: Bianco, Japanese companies : Sieren) is not applied, so it is a problem for many knitted fabrics and functional fabric producers.

In order to overcome these difficulties, attempts are being made around the world to correct the distortion of fabrics by detecting the degree of distortion of fabrics occurring in various patterns of fabrics that are newly emerging with an image processing technique using a vision camera.

Here, using only one camera, the camera is continuously scanned left and right to detect the distorted state of the fabric (representative company --> German company: Pleva), or multiple cameras arranged in parallel (representative) Companies --> German companies: Erhardt+Leimer), and other countries in Korea and China, there are attempts to develop a machine in a way that detects the distorted state of the fabric by arranging two cameras on the left and right sides of the fabric.

However, because the input changes are severe due to the various patterns of the fabric that do not have a regular shape, it is not easy to completely process it, so all companies are experiencing difficulties in development.

Therefore, a machine that can sufficiently satisfy consumers has not yet appeared, causing a lot of inconvenience to the related industry.

Accordingly, our company, which has been producing weft straighteners, is also focusing on research and development to produce a hybrid type pattern straightener by adding an artificial intelligence machine vision method to the existing optical transmission slit type weft straightener.

In this case, the far-end sensing unit using the vision camera is generally arranged in the order of the light source, the far-end, and the video camera, and this is called a light transmission method.

In addition, three-glass may be additionally disposed between the light source and the fabric for homogenization of the light source.

However, if the fabric is thick and light is not transmitted, the order of arrangement is changed to fabric, light source, and camera to use the light reflected from the fabric surface. This is called the light reflection method.

In this case, the light source used as a light source is generally a commercially available halogen lamp or a specially manufactured light emitting unit using an infrared LED.

However, in recent years, as LED lighting has been generalized, the quality of the generally used visible light LED bulbs is very good. Therefore, it is expected that purchasing and using an LED bulb, which is a general lighting device, is cheaper and more convenient to use than making a light source with infrared LEDs.

However, when using a general LED bulb, it is not unreasonable to use the general LED bulb for the light transmission method because the general LED bulb is not a product specialized for the weft straightener. It is very inconvenient to place a large number of thick general LED bulbs in a circle around the camera in a narrow space between the cameras.

In addition, in order to detect the distorted state of the fabric more accurately, a number of camera detectors are arranged in parallel. This is because when the machine roller length is 2m, the number of cameras in parallel arrangement is basically 8, and when the roller length is increased to 4m, the camera is increased to a maximum of 16.

However, it is not easy to arrange a large number of reflective fluorescent light sources (8 to 16) in parallel in a narrow space of the machine by arranging a large number of bulky general LED bulbs in a circle around the camera.

To arrange such a bulky light source, a large space is required, and to secure this space, the volume of the machine must be increased more than necessary, which is inconvenient.

In addition, it is difficult to focus the light projected from a plurality of bulky light sources near the focal point of the camera lens.

Accordingly, in the prior art, registration No. 10-0687576 'illuminating device used for high-speed inspection of fabrics' and 'device and method for in-line reading and controlling the warp of a loom' of Publication No. 10-2008-0011309, and registration No. 10-1741767 'Scanning scene using camera', Registration No. 10-1873024 'Fabric pattern precision detection device in fabric straightener' and Registration No. 10-2006205 'Fabric detection in fabric straightener' Although the 'high-speed data transmission apparatus for a high-speed camera' has been disclosed, the above problems are still not improved.

The present invention was devised to solve the problems of the prior art, and the light source body uses a high-brightness LED module. After forming a through-hole so as to be able to do so, one or more high-brightness LED modules can be located on the outer periphery around the through-hole so that a plurality of high-brightness LED modules can be centrally miniaturized so that a plurality of light sources can be arranged in parallel even in a narrow space of the non-cradle. It aims to provide a fabric pattern precision detection device using a reflective light source that can utilize a small space using a light source of strong brightness.

Accordingly, the present invention is a fabric pattern precision detection device configured on a cradle on which a fabric is mounted, and configured with a camera and a light source body to precisely detect a skewed or bowed portion of the fabric, wherein the light source body is a substrate A high-brightness LED module mounted in close contact with the camera is configured, and a light-transmitting hole is formed on one side of the camera to accurately photograph the fabric through the lens of the camera, and a heat sink for dissipating heat emitted from the high-brightness LED module is configured, Reflected light characterized in that it comprises a support through-hole formed on one side of the heat sink and formed in the same shape as the light-transmitting through-hole, and a support plate formed on the outer periphery of the support through-hole and having an LED ball in which the high-brightness LED module is located. A device for precisely detecting a fabric pattern using an original body is characterized by its technical characteristics.

According to the device for precisely detecting a fabric pattern using a reflective light source according to the present invention, one or more small high-brightness LED modules can be configured on the outer periphery of the part where the camera lens is located, so that the reflective light source method can be applied, and the Due to the miniaturization, the overall volume of the precision detection device can be minimized, so it can be used in a small space, and due to the arrangement of the small space, a large number of units can be arranged in parallel on the non-cradle. .

1 is a perspective view showing a preferred embodiment of the present invention;
2 is a side cross-sectional view showing a preferred embodiment of the present invention;
Figure 3 is a front view showing a support plate in the configuration of Figure 1;
4 is a perspective view illustrating another embodiment of FIG. 1 ;
Figure 5 is a front view showing an auxiliary support plate in the configuration of Figure 4;

Hereinafter, the preferred configuration and operation of the present invention for achieving the above object will be described with reference to FIGS. 1 to 5 with reference to the accompanying drawings.

First, the fabric pattern precision detection device using the reflective light source of the present invention is configured on a cradle on which the fabric is mounted, and in order to precisely detect the skewed or bowed part of the fabric, the fabric pattern precision composed of a camera and a light source body In the detection device, the light source body comprises a high-brightness LED module 500 mounted in close contact with the substrate, and one side of the camera 100 passes through the light transmission so as to accurately photograph the fabric through the lens of the camera 100 . A ball 210 is formed and a heat sink 200 for dissipating heat is configured, and a support through hole 410 configured on one side of the heat sink 200 and formed in the same shape as the light transmitting through hole 210 ) And, the support plate 400 is formed on the outer periphery of the support through-hole 410 is formed with the LED hole 420 in which the LED module 500 is located.

When the above-described present invention is described in more detail,

The fabric pattern precision detection device of the present invention is configured on a cradle on which the fabric is mounted, and includes a camera and a light source to precisely detect a skewed or bowed portion of the fabric.

Referring to FIGS. 1 to 3,

The light source body consists of a high-brightness LED module 500 mounted in close contact with a substrate, and in the present invention, a light source element (COB type) generally used in an LED bulb is used.

The heat sink 200 is configured on one side of the camera 100 and has a light transmission through hole 210 formed therein so that the fabric can be precisely photographed through the lens of the camera 100, the high-brightness LED module 500 It dissipates the heat radiated from the

In addition, the light-transmitting through-hole 210 allows the reflected light reflected from the far end to be transmitted through the lens of the camera.

The support plate 400 is configured on one side of the heat sink 200, the support through-hole 410 and the LED hole 420 are formed.

The support through-hole 410 is formed in the same position as the light-transmitting through-hole 210 formed in the heat sink 200, and in the present invention, it is formed in the same shape as the light-transmitting through-hole 210 to form the lens of the camera 100. Through this, it was possible to photograph the fabric precisely.

The LED holes 420 are formed at regular intervals on the outer periphery of the support through-holes 410 .

The LED module 500 is positioned in the LED ball 420, and in the present invention, the shape is a square shape.

The shape of the LED ball 420 may be formed to be the same as the external shape of the LED module 500 or may be formed to be the same as the external shape of the light-emitting part of the LED module 500, so the above shape is limited. I won't.

In addition, as shown in FIG. 3 , the LED hole 420 may be formed in a plurality on the outer periphery of the support through hole 410 .

The configuration of a plurality of the LED balls 420 is to maximize the brightness of the reflective light source so that precise detection can be performed simultaneously with precise photographing of the fabric.

The heat sink 200 and the support plate 400 are connected to each other so that they can be interconnected using a separate connecting member after the components come into contact, or connected using the separate connecting member, but on each abutting surface. By forming each coupling protrusion and coupling groove, respectively, it was possible to prevent rotation in the vertical direction after each component abuts.

4 and 5 as a reference,

The auxiliary support plate 600 is configured on one side of the support plate 400 , and auxiliary through-holes 610 and auxiliary LED holes 620 are formed.

The auxiliary through-hole 610 is formed in the same shape and the same position as the support through-hole 410 so that the fabric can be precisely photographed through the lens of the camera 100 .

At this time, the shape and position of the auxiliary through-hole 610 is the above-mentioned shape because it is possible to change various shapes and positions except for the shape and position that are obscured by the shooting when the fabric is precisely photographed through the lens of the camera 100 . , the location is not limited.

The auxiliary LED ball 620 has the same shape as the LED ball 420 and is formed in the same position, and a protrusion 621 is formed to prevent separation of the LED module 500 located in the LED ball 420 .

The auxiliary LED ball 620 has a rectangular shape in the present invention.

However, the shape of the auxiliary LED hole 620 may be the same as the external shape of the LED module 500 or may be formed to be the same as the external shape of the light-emitting part of the LED module 500 . I will not limit the

In addition, the protrusion 621 is formed in the auxiliary LED hole 620 in the inward direction from the auxiliary LED hole 620 to prevent the LED module 500 located in the LED hole 420 of the support plate 400 from departing. is formed by protrusion.

One or more protrusions 621 may be formed in the auxiliary LED hole 620 .

The support plate 300 has a plate through hole 310 of the same shape and the same position as the light transmitting through hole 210 on one side of the heat sink 200, and is bent in one direction at the bottom so that it can be mounted on a cradle. A bent portion 320 is formed.

The plate through-hole 310 is formed in the same shape and the same position as the light-transmitting through-hole 210, but when photographing a fabric through the lens of the camera 100, it is possible to obtain various Since the shape and position can be changed, the above-described shape and position are not limited.

In addition, in the case of the bending part 320, it is formed so as to be mounted on the vision holder, and a bolt through hole is formed so that it can be connected to the vision holder through a separate bolt.

The bolt through hole is formed in the shape of an ellipse, and may be formed in a horizontal direction or a vertical direction, or a combination of horizontal and vertical directions.

In addition, a ring portion is formed on the bottom surface of the bent portion 320 to prevent the flow after the support plate 300 and the non-cradle are connected, and the ring portion is constant in the direction opposite to the direction in which the support plate 300 flows. Formed at an angle or formed in a predetermined round so that the flow does not occur after positioning the support plate 300 through the ring portion.

The connection between the support plate 300 and the auxiliary support plate 600 is such that, after the components are in contact, mutual connection can be made using a separate connecting member, or connected using the separate connecting member, but each abutting Each of the coupling protrusions and coupling grooves were respectively formed on the front or back side, or on the front and back sides, so that each component could be prevented from rotating in the vertical direction after abutting it.

When this is described with reference to FIG. 4,

The coupling protrusion and the coupling groove are formed singly or mixedly on one surface of the first component, or correspond to the coupling protrusion or coupling groove formed in the first component on one surface of the corresponding second component, and are coupled was formed so that it could be

The coupling protrusion and the coupling groove are formed on the front side of the heat sink 200, on the front and back sides of the support plate 300, respectively, on the front and back sides of the support plate 400, respectively, on the back side of the auxiliary support plate 600 .

According to the present invention as described above, one or more small high-brightness LED modules can be configured on the outer periphery of the part where the camera lens is located, so that the reflected light source method can be applied, and the precision detection device due to the miniaturization of the reflected light source It is possible to minimize the overall volume of the device, so it can be used in a small space, and multiple units can be arranged in parallel on the non-cradle due to the arrangement of the small space.

100 : camera
200: heat sink 210: light transmission through hole
300: support plate 310: plate through hole 320: bent part
400: support plate 410: support through hole 420: LED ball
500: LED module
600: auxiliary support plate 610: auxiliary support through hole 620: auxiliary LED hole
621: protrusion

Claims (3)

In the fabric pattern precision detection device configured on a cradle on which the fabric is mounted, a camera and a light source body to precisely detect a skewed or bowed part of the fabric,
The light source body is composed of a high-brightness LED module 500 mounted in close contact with the substrate,
A light transmission through hole 210 is formed on one side of the camera 100 to accurately photograph the fabric through the lens of the camera 100, and a heat sink 200 for dissipating heat is configured,
A support through-hole 410 configured on one side of the heat sink 200 and formed in the same shape as the light-transmitting through-hole 210, and a support through-hole 410 formed on the outer periphery of the support through-hole 410, the LED module 500 A fabric pattern precision detection device using a reflective light source, characterized in that the supporting plate 400 on which the LED hole 420 is formed is configured.
The method of claim 1,
Doedoe configured on one side of the support plate 400 and formed in the same shape and the same position as the support through-hole 410 and the auxiliary through-hole 610 formed in the same position, and the LED hole 420, the same shape and the same position. A reflective light source, characterized in that the auxiliary support plate 600 on which the auxiliary LED hole 620 is formed with a protrusion 621 for preventing the LED module 500 from being separated from the LED hole 420 is configured. Fabric pattern precision detection device.
The method of claim 1,
On one side of the heat sink 200, there is a plate through hole 310 of the same shape and the same position as the light transmitting through hole 210, and a bent portion 320 bent in one direction at the bottom to be mounted on a cradle. A fabric pattern precision detection device using a reflective light source, characterized in that the formed support plate 300 is formed.

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