Design Of Control System Of Lifting And Transferring Dimensional Parking Garage Based On PLC

Multilayer mechanical parking garage can increase the utilization rate of existing land resources,make full use of its top space,and store the cars in the maximum degree,so it can effectively solve the parking problem in the city.This research project studies the lifting and transferring three-dimension garage,which is currently widely used,and makes an effective improvement to reduce the construction cost and improve the garage management efficiency.It gives a systematic analysis of its multilayer and multi-column structure,namely the matrix form of two-dimensional M*N,which can provide the total number of vehicles C=M*N-(N-1),where M is the number of columns of the designed garage and N is the one of its rows.Moreover,it takes the lifting cross-sliding three-dimension parking garage with three layers of three columns and seven spaces for example,to analyze its basic structure and the working principle for managing the cars,and research its system components,input signal,output signal,the linkage and interlocking relationship between the control system and every layer and every column.By the state space of artificial intelligence,a scheduling algorithm of the system is proposed,and the problem of node expansion has been solved,so as to obtain the vehicle scheduling algorithm.Simulation design and implementation is carried out by using the software MCGS;and detailed production description,such as the start-up of the sweep board,deposit and withdrawal process,parking status display,is illustrated by PLC control ladder diagram.Safety is reflected in the design of its hardware and software.Power-off protection is set in the circuit,open phase power-off,loss of phase,phase sequence line protection,loss of phase,and phase sequence protection device are set,to ensure the action of the corresponding protection devices such as fuses,leakage protection,relay action,the cutting off the main power of equipment and and the protection of the personnel and equipment safety when the phase failure occurred in the main power supply circuit,or equipment occurs phase and reverse faults.Three-dimension garage system adopts the proximity switch and a series of sensors,such as photoelectric sensor,smoke temperature sensor,the displacement sensor,etc..to complete the detection of vehicles,personnel,location and environment automatically.