Working principle
In the Cotton Sorter, the material passes through
a transparent tunnel. In the inspection zone, the
cotton is diffusely illuminated.
The individual tufts are observed by means of four
ultra-fast high resolution CCD line scan cameras.
Simultaneous image acquisition from both sides
enhances the detection capability.
Image processing includes correction for non-uni-
form lighting, contrast enhancement and feature
extraction. Defects that are of a different color than
the raw cotton and are of a certain size, are detected
in the cotton flow.
In order to allow exact timing between contami-
nant detection and activation of the downstream
ejection mechanism, the speed of the cotton
flow is continuously measured. After the cor-
responding delay, the appropriate high speed air
guns are activated downstream.
Specifications
Enclosure:
sealed for dust protection temperature controlle
touch screen operator’s panel
Camera:
CCD line scan - 2592 pixels - 1450 lines per second
- 8 bit or 256 color levels - 4 cameras per sorter
Illumination:
high frequency light tube - 16 light tubes per
sorter
Ejection:
20 air guns, 90 psi or 6 bar, 5 mu filtered dry air
Power:
3x400 V (50/60 Hz), 2 kW power consumption
Weight:
1400 kg or 3960 lbs
Capacity:
1200 kg/hour. Dual Feed Sorter
2x500 kg/hour is also available.
