The Research Of The Storage-Retrieval Strategy For Automatic3D-Park With Car Containing Plate Buffer Device

With the growing population and the rapid development of automobile industry, car ownership increases rapidly, and then it brings a constant decrease in per capita space. Therefore,"parking difficult" issue becoming an attention problem of people’s daily life. Mechanical parking equipment resolved this problem, becomes effective measures to solve the parking problem in the city of high cost of land. Mechanical parking equipment effectively used the vertical space, greatly reduces the footprint of unit vehicles and improves the utilization of the land.Parking facilities worldwide have years development history, with Japan, Germany, France, Italy, the Netherlands, the United States, South Korea and Taiwan of our country develop rapidly. Automated parking equipment is an technology-intensive electromechanical integration equipment, it can be quite extensive as involving the field of mechanical, electrical, hydraulic, optical, magnetic, etc. Currently kinds of the automated three-dimensional parking garage are variety. The main kinds are lifting and transferring garage, laneway garage, vertical lift garage, vertical circulation garage. Due to its large storage capacity and small space, stacker stereo garage became the mainstream developing direction of parking garage, and loved by the majority of users. At the same time, stacker stereo garage’s large storage capacity and small footprint make it less access efficiency. In order to achieve large access density and high access efficiency at the same time, a deep research in the access policy of stacker stereo garage go ahead to find the characteristics and defects of access process. For the problems identified, a new method put forward to improve the access efficiency of stereo garage.Stacker stereo garage accesses car in two ways, with car containing plate and without car containing plate. Compared with the access mode without car containing plate, there is no contact with the vehicle using the access mode with car containing plate, the vehicle body without any damage. The research shows that when using the access mode with car containing plate, a car parking space corresponds to a carrier plate. Keeping car task must start with taking on the car carrier plate from the selected deposit and, and picking up car task must start with setting the car plate back to the original deposit. It wasted a lot of time to transport car carrier plate without car, increased the access time for each car access task and reduced the access efficiency. Car owner’s operating and the stacker’s operation are connected in series, so the owner’s operation process and the stacking operation can not be performed at the same time, one must wait for a completion of another before it can begin operating, cause the human influence greatly to the garage access efficiency. In the past, when analysis of time to access car of the automated parking, most researchers ignored the car owner’s taking time, so that human factors are not reflected and result in unrealistic nature.To solve the above problems affecting access efficiency, a new automated parking garage with a car carrier board cache device is put forward. With this car plates containing cache device, there is no need to access car carrier plate without car each time, reduced the time of access car. Car owner’s operating and the stacker’s operation are not connected in series, only when stacker running time less than the car owner’s operating time need, it required to consider the person’s operating time. It eliminates a lot of time which does useless work, and increases the stacker stereo garage’s processing capacity and access efficiency.In order to analyze the efficiency of the new parking access how much higher than the original system, use an average access time of a mathematical model as the objective function, and calculate the average service rate under a variety of access policy, then compared the actual vehicle arrival rate. After analysis and comparison it can be found that auto stereoscopic garage with car plate cache device can greatly improve the efficiency of the garage access, meet the requirements of most real-life traffic model. The new automated parking garage with a car carrier board cache device proposed, which can effectively reduce the access time automated three-dimensional car parking garage and improve their access efficiency, has a very important practical significance.