棉花异性纤维剔除延时时间控制算法的分析

Based on a CCD+DSP cotton foreign fiber separated system, the concerned six time slots about the delayed time of separating foreign fiber---the delayed time of transmitting a image from CCD to DSP, the delayed time of image processing of DSP, the delayed time of carrying out PLC programs, the delayed time of opening solenoid valve, the delayed time of air current moving to foreign fibers, and the delayed time of transporting cotton from detected point to separated point---were analyzed fully and clearly in the article. The six time slots were calculated accurately after confirming the concerned apparatuses characteristics and control parameters. The formula of calculating the six time slots were also given in the article. In order to calculate the delayed time of transporting cotton from detected point to separated point, a way of detecting air current moving speed which based on ultrasonic was also proposed in the article.