Design of fabric guide line tracker based on position sensitive detector

For achieving tubular fabric guide line automatic tracking identification,a fabric guide line tracker based on position sensitive detector(PSD) was designed.The structure of the system and tracking principle were introduced.The overall system program and working principle were illustrated with focuses on system light source,preamplifier circuit and A /D conversional circuit.In order to improve the precision and stability of the system,in the course of PSD signal processing,software algorithms was used instead of the traditional arithmetic processing circuit.The fabric guide line tracking experiment was carried out in platform-driven CNC.The results showed that the position accuracy of the system is less than ± 1.5 mm,which meets the location accuracy requirement on fabric cutting.