Sensor Frequency
Automated fabric inspection systems utilize cameras that capture a moving textile web one single row of pixels at a time. The line-scan rate defines the number of single lines captured by the sensor per second to ensure complete coverage of the fabric as it rolls past the camera. This frequency must be synchronized with the mechanical speed of the winding machine to prevent distortion of the image.
Image Resolution
Higher speed lines require the sensor to capture thousands of lines per second to avoid missing small defects like broken yarns or oil stains. If the sensor runs too slowly, the resulting image is compressed, making rectangular defects look square or elongated. Conversely, running the scanner too fast stretches the image along the direction of travel.
Inspection Application
Machine vision units in finishing mills use this parameter to optimize defect detection at high production speeds. When the winding speed of the fabric increases, the system automatically increases the line-scan rate of the camera. This synchronization allows the software to analyze the fabric surface with sub-millimeter precision.
Processing Limit
Increased capture frequency demands higher light intensity to maintain a proper exposure on each line. In addition, the volume of data generated by rapid scans can overwhelm the image processing computer if the fabric speed exceeds the processing capacity of the board. Therefore, the maximum inspection speed is limited by both lighting power and computer bandwidth.
