As the field of technical fabrics includes everything that is not traditional textile, a great variety of materials and production processes constitute this industry. Yet products made of such materials as synthetic leather, waterproof fabrics and many other technical fabrics, all require high quality raw material, manufactured by cost effective processes.
EVS provides the technical fabrics industry with Automatic Optical Inspection (AOI) systems suitable for quality inspection in the production processes of a variety of technical fabrics. A consistent set of hardware components is implemented in different processes by applying a different set of software parameters. Increased accuracy, improved quality and decreased labor and costs are some of the advantages.
Technical Fabrics Inspection Process
EVS systems can be installed in a variety of production processes. Speed varies between slow (10m/min) and fast (200m/min), in accordance with the fabric type. Typical detectable defect size is between 0.5mm – 1mm.
The hardware of the system is designed to fit line structure constrains (space limitations), in almost all existing production lines. Typical width of inspected fabric ranges between 1m and 4m.
Slit lines can be added prior to the inspection, when the width of each slit is known in advance and fixed. This enables the operator to monitor defects per slit, in the defects map, and also to issue a report per slit.
The typical inspection location is at the exit of each production line.
Detectable Defects:
- Weaving defects
- Finishing defects
System Modules:
EIP - Embedded Image Processing integrates the video camera with the image processing hardware and software. With the implementation of EIP the system reliability is increased, the number of components is reduced, the installation process becomes significantly easier and maintenance costs go down.
QST - Quick Style Tuning provides feedback from the video album review to the inspection instruction file. It enables rapid optimization of the inspection process of new styles, enhances detection while minimizing over-detection.
DSA - Defect Sorting Algorithm enables better definition of defect categories for an automatic sorting of defects into groups.
System Benefits:
- Improved quality of final product
- Reduced labor costs
- Roll grading and fabric routing
- Replacing final inspection of greige fabric
- Collecting defects data
- Central control on the finishing line operation
- Simpler plant operation
- Increased automation of plant
System Highlights:
- Modular, compact, cost-effective
- Centralized control over multiple inspection points
- Inspection of images is performed inside smart cameras; central computer receives only inspection results
- No special knowledge of image processing is required for system operation or maintenance
- Operating System is based on Windows NT, with customized application programs
- Fast Ethernet communication
- Each camera is equipped with a Local Control Unit, capable of transmitting or receiving standard signals to or from external electronic devices
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