Design of Control System for Operation Line for Detection and Classification of Recycled Drill Pipes

In order to meet the urgent need for quality monitoring and classification evaluation of recycled drill pipes,an automatic detection and classification operation line is developed to replace the currently-adopted manual operation.Composed of the MFL/UT combined NDT system as working with the drill pipe rotating,the automatic geometrical dimension laser measurement system and the automatic classification equipment,a net-worked control system is designed based on Local Area Network,Ethernet,MPI and PROFIBUS-DP,which is capable of integrating inspection data and classification information so as to realize the automatic collection/dis-tribution control of the production line.The actual site application result proves that the newly-developed control system that features reliable and consistant running has significantly improved production efficiency and product quality as well.