Design And Picking Path Optimization Of Long-depth Three-dimensional Warehouse Control System

Warehouse management is a set of optimal scheduling,automation control,logistics management and other disciplines as one of the integrated disciplines.The automated warehouse as a storage management of a very important node,in addition to the storage of goods,it is connected to suppliers and demand providers transfer station.Therefore,the optimization and control of automated warehouse,not only reduces the time of the goods out of storage,saving manpower and material resources,but also from the entire warehouse management is also greatly reduced the operation of the goods cycle time.The optimization of the three-dimensional warehouse should be based on the stacking machine's picking path and the stacker's control system.Taking into account the engineering practice may affect the three-dimensional warehouse operations of the various problems,and on this basis,a more flexible response to some unexpected situation of the storage model-long vertical warehouse.The warehouse is characterized by a long shelf length,and in a roadway with two stacking machine.First of all,according to the characteristics of long vertical warehouse,to determine the overall layout of the warehouse.That is,to determine the location of the two stacking machine out of the library platform,and two stacking machine in the goods out of storage operations "U" type of path mode of operation.In addition,in order to avoid collision between two stacking machines in a roadway,the MVRP problem is transformed into VRP problem by region division method.Secondly,the final analysis of the location of the stacking machine's picking path-warehouse.The problem of warehouse location optimization is multi-objective optimization problem,and the particle swarm optimization algorithm is used to solve the problem,and the reasonable distribution of warehouse location is realized.In order to determine the starting point of the stacking path,the stacking machine's stay strategy was discussed.Through the analysis and calculation,to determine the stacking machine into the storage platform for the stacking machine to stay.Subsequently,the mathematical model of the stacking machine picking path is established.Through the idea of ?genetic algorithm,the routing of the stacker is optimized,and the optimization model is simulated by MATLAB software,and the conclusion is given that the optimization of the stacking path is effective.Finally,the stacker control system is designed.Through the design of the control system,the stacker can be moved along the optimal path.In order to achieve the reliabilityof control,and take into account the principle of economy,select the Siemens S7-200 as the core of the control system.PLC through its extended EM253 PWM / PTO pulse output module external pulse,the pulse through the servo drive into the servo motor,the motor rotation angle control,in order to achieve the stacker movement in space.In addition,in order to prevent the collision of the stacker,the control system is equipped with a limit switch;in order to more effectively read the cargo information,planning the cargo location,set the bar code system;in order to accurately locate the stacker Control set up a horizontal,vertical address system;set the monitoring system can be real-time monitoring of the movement of the system,and can also troubleshoot the fault.