Design Of Parking Guidance System In Large Parking Lot Based On Internet Of Things

In order to improve the use efficiency of parking spaces in large parking lots,solve the problem of parking and reverse car searching for users,and provide the best parking services for users,starting from the existing research results,this paper analyzes the reference and shortcomings of the existing research,and puts forward the research direction and research focus of the paper.According to the parking space layout and parking space usage of large parking lot designs a parking guidance system.In the path planning algorithm,I measure the advantages and disadvantages of related algorithms,and choose the better algorithm to solve the shortest path problem.From the point of view of solving the parking problems of society,parking users and parking management personnel,this paper analyzes the functional requirements of parking guidance system,so as to lay the foundation for the design of parking guidance system.This paper analyzes the user parking process,takes the whole parking process as the overall design guiding idea of the system framework and application technology,divides the different steps of the parking process into different functional modules,guides the development of functional modules of the parking guidance system,and realizes the parking guidance function combined with software development technology.According to the different needs of users,I provide a complete parking guidance scheme for users through signal guidance and navigation to simplify the parking process.The main work of this paper is as follows:Firstly,the shortest path planning model of parking lot is designed.By abstracting the parking space as a coordinate point of two-dimensional coordinate system,the Manhattan distance from the user is calculated respectively,and the parking space with the smallest Manhattan distance is selected as the optimal parking space.Taking the user’s location as the starting point of path planning,the optimal parking space as the end point of path planning,and the A* algorithm as the path planning algorithm,the user parking route is planned.Through further optimization of the algorithm,the algorithm has higher efficiency.Then,My SQL is used to build the database system,and My SQL front software is used to manage the database visually.According to the data function,the data tables of user information,parking information,parking space information and order information are established,and E-R diagram and table attributes are drawn according to its function.Through the database to complete the collation and storage of data,improve the convenience and security of data management.Then,through the comparative analysis of the advantages and disadvantages of different parking space detection technologies,the intelligent parking lock technology is selected as the parking space detection technology in this paper.Through the change of the use state of the intelligent parking lock equipment,the idle parking space and occupied parking space can be changed,and then the parking space state can be detected,which solves the problem of installing a large number of detection equipment in the process of parking space detection,and improves the efficiency of parking space detection The safety of the vehicle.By comparing and analyzing the attributes and characteristics of different indoor positioning technologies,Wi-Fi indoor positioning technology with high positioning accuracy and not easy to be affected by the surrounding environment is selected to realize the user location function.Finally,according to the Android studio,the overall function framework of vehicle location,parking space detection and reverse payment system is designed.Based on Wi-Fi indoor positioning technology,the underground positioning and data transmission of people and vehicles are realized,which lays the foundation for vehicle navigation.Through the parking space reservation function,users can reserve the free parking space in the designated underground parking lot in advance,avoiding the problem of preemption.The shortest path from the target location to the designated parking space is planned based on A* algorithm.Users can quickly stop and reverse search according to the signal guidance or the navigation information of mobile phone client.After parking,the corresponding vehicle information is identified by vehicle identification technology,and the server sends the order to the user or the user swipes the card manually to complete the payment.