The Design And Realiztion Of Anti-collision Protected Function And Optimal Path Scheduling For The Laser Guided AGV In The Tobacco Company’s FMS

With the introduction and wide applications of laser guided AGV in the tobacco corporation,the logistics automation level is increased greatly. But with the introduction of flexiblemanufacturing system, the production line of the tobacco corporation become more complicate,the material requirement become more flexible, so the safety and stability during the running ofthe laser guided AGV has been challenged greatly.Through analying the operational states and operational reports of our company’s laserguided AGV, we find that there are many problems during the running of the laser guided AGV,such as high failure rate、inaccuracy location postioning、easy to be blocked and high systemloading in mulit-AGV situation, and so on. To increase the running safety and stability of thelaser guided AGV, in this paper, anti-collision protection and optimal path scheduling of the laserguided AGV is researched. The major contribution of this paper is summarized as follows.In the aspect of the laser guided AGV anti-collision protection. Firstly, to solve the problemof the AGV unable to stop during emergency, we propose to add an emergency stop switch.Secondly, to solve the problem of the AGV unable to stop when it collide obstacle duringloading, we propose to add a limit switch. At the end, to solve the problem of the too smalleffective search coverage of the laser guided device, we propose to add an obstacle detector. Inaddition it adds the position calculated function one the basis of the anti-collision protection,which greatly improves the safety and accuracy of the AGV traveling.In the aspect of the laser guided AGV optimal path scheduling. There exist two flaws for the adopting of multi-machine and multi-requirement in the flexible manufacturing system,deadlock phenomenon and system loading increasing. To solve the problems, we propose a newmethod combining the Floyed algorithm and banker’s algorithm. This method can avoiddeadlock, reduce system loading and increase the efficiency of the path searching effectively.The major contents of this paper are based on the research of the laser guided AGV of theHangzhou Tobacco Corporation, at present, the system is running normal and stable. Theadopting of the laser guided AGV has replaced the original human material transporation method,increased the logistics automation level and management level and established a favorable basefor developing as the key cigarette enterprise.