An automated vision system designed by Scorpion Vision provides real-time, high accuracy non-contact measurements of the fibre width from the entire length of the material as it is wound onto the spool.
The system consists of a box containing a high resolution camera to allow measurements to the micron level, if required, LED lighting, strobe controller and an industrial PC. It is controlled via a separate touch screen with a custom designed graphical user interface (GUI). High speed strobe lighting is used to eliminate motion blur and effectively ‘freeze’ the motion of the ribbon for measurement. A signal from an encoder on the spool equipment roller is used to trigger the lighting pulse and the camera exposure.
The encoder signal defines the interval between the image captures, and therefore the distance interval along the ribbon for the measurements. A white background is positioned below the ribbon for carbon fibre measurements and a dark background for glass fibre measurements.
This ensures optimum contrast in the images for edge detection. Several image processing tools within the Scorpion Vision Software are used to condition the image for measurement. The software locates the fibre in the field of view and automatically measures the width and other parameters.
The touch screen displays the current average width as well as the length of fibre processed so far. All results are saved locally in a CSV format and at the end of the run they are wirelessly uploaded to the company’s servers.