WO2023239319A1

WO2023239319A1 - Automatic fabric inspection machine that detects defects and colour differences in fabrics

Info

Publication number: WO2023239319A1
Application number: PCT/TR2022/051730
Authority: WO
Inventors: Izzet SAVAS
Original assignee: Serkon Tekstil Makina Ve Ekipmanlari Sanayi Ve Ticaret Limited Sirketi
Priority date: 2022-06-08
Filing date: 2022-12-30
Publication date: 2023-12-14
Also published as: TR2022009495A2

Abstract

The invention relates to an automatic fabric inspection machine, which unrolls the rolled fabric, scans the fabric defects by the defect detection sensor, scans the fabric defects by the colour control sensor and determines the colour differences of the edge-middle-edge sections in the width of the fabric and the head-middle-end sections in the length of the fabric, or performs these operations separately, and rewinds the unrolled fabric back to the roll.

Description

AUTOMATIC FABRIC INSPECTION MACHINE THAT DETECTS DEFECTS AND COLOUR DIFFERENCES IN FABRICS

TECHNICAL AREA

The invention provides an integrated process for unrolling the rolled fabric and scanning the fabric defects in the defect detection sensor, scanning the fabric defects in the color control sensor and determining the color differences of the edge-middle-edge sections in the width of the fabric and the head-middle-end sections in the length of the fabric, or can perform these operations separately, It is about an automatic fabric inspection machine that can rewind the opened fabric back into rolls.

PRIOR ART

Defects detected in the fabric in garment processes are very important in terms of production efficiency. The control of raw material fabrics to be stored or fabrics to be produced in the cutting room is carried out by visual inspection, which is the classical method, or by CCD cameras that produce more technological solutions.

The classical method of inspecting fabric in garment production processes involves the machine operator's visual inspection of the fabric as it is passed through an illuminated area. More advanced methods use CCD and CMOS technology.

Since defect detection in the classical method is operator dependent, it is not possible to be repeatable and to identify defects completely. Fatigue and lack of attention on the part of the operator are some of the reasons. The line of passage of the fabric for inspection may be long enough to damage the fabric. In addition, this method requires experienced and costly labor and is not sufficient to solve the problem completely.

In fabric inspection systems using CCD and CMOS camera technologies, defects are detected by processing images taken from the fabric. This method requires a closed area illuminated with lights where the fabric is controlled. In addition, external factors such as noise and vibration can cause these systems to give inaccurate results.

FIGURE LIST

Figure 1. Automatic Fabric Inspection Machine General View Corresponding numbers shown in the figures

1. Wheel

2. Defect Detection Sensor

3. Color Control Sensor

4. Labeling Device

5. Air Combs

6. Movement Mechanism

7. Insulator

8. Fabric

9. Cylinder Rotating with Multiple Drives

10. Idle Rotating Cylinder

DETAILED DESCRIPTION OF THE INVENTION

In order to detect fabric defects in the automatic fabric inspection machine, at least one defect detection sensor(2) based on line scanning technology is used, where the fabric is illuminated from below. At least one color control sensor(3) based on spectrophotometer is used to determine the color differences in the edge-middle- edge of the fabric width and head-middle-end sections of the fabric length.

The machine chassis is mounted on wheels(1 ) that can be fixed when desired, providing flexibility and ease of use in the field of use, which can be as man- powered or motor-driven capable of relocating. There is at least one of more than one driven rotating cylinder(9) or idler rotating cylinder(10) on the machine that unwinds the fabric(8) from the roll, carries it to the sensors and rewinds the fabric back into the roll. In order to facilitate the passage of the product to be inspected, the frame carrying the defect detection sensor(2) and color control sensors(3) is moved by a movement mechanism consisting of at least one of pneumatic, hydraulic or electric actuator and piston(6). The passage of the product into the machine cylinders is carried out using at least one of the manual or automatic guiding mechanisms.

When the inspection starts, the fabric flow continues automatically and the inspected product rubs passes the defect detection sensor(2) by friction. Therefore, protection is provided from external factors such as vibration and noise that may cause incorrect data acquisition. Air is blown to the fabric with air combs(5) to prevent any foreign matter between the defect detection sensor(2) and color control sensors(3) and the fabric. In order to prevent static electrification problems that may occur during fabric passage, one or more antistatic brushes or insulators(7) formed by at least one of the bars are positioned between the rollers.

There is at least one labeling device(4), positioned in plain view of the machine operator to indicate the location of the defect when it is detected, and capable of printing labels at the level of the defect or at the location of the defect without stopping the fabric control flow.

After the control process is completed, the fabric is rolled again.

Claims

CLAIMS It is an automatic fabric inspection machine that unrolls the fabric in roll form and scans the fabric defects by scanning in the defect detection sensor, scans in the color control sensor and determines the color differences of the edge-middle-edge in the width of the fabric, the head-middle-end sections of the fabric length, or can perform these operations separately and can rewind the unrolled fabric back into the roll;

- a flaw detection sensor based on at least one line scanning technology, where the fabric is illuminated from below (2),

- spectrophotometer-based at least one color control sensor that determines the color differences in the edge-middle-edge of the fabric width and the head-middle-end of the fabric length (3),

- at least one of more than one driven rotating cylinder(9) or idler rotating cylinder(10) on the machine that unwinds the fabric (8) from the roll, carries it to the sensors and rewinds the fabric back into the roll,

- frame that carries the defect detection sensor (2) and color control sensors (3) to facilitate the passage of the product to be checked,

- a movement mechanism consisting of at least one of a hydraulic or electric actuator and a piston (6),

- air combs (5) to blow air through the fabric to remove any foreign matter that may be between the fabric and the defect detection sensor(2) and color control sensors(3),

- an insulator (7) formed by at least one, one or more antistatic brushes or bars between the rollers in order to prevent static electrification problems that may occur in the passage of fabric,

- positioned in an area clearly visible to the machine operator to indicate its location when a fault is detected, is characterized by at least one labeling device(4) that can print labels at the alignment or position of the defect without stopping the fabric inspection flow. The defect detection sensor(2) as claimed in claim 1 , characterized in that it is positioned in frictional contact with the fabric during the flow of the fabric in order to protect it from external influences such as vibration, noise, etc., which may cause incorrect data acquisition.