| With the improvement of living standard, there are more and more vehicles in the public. The parking situation is very serious in many large and medium-sized cities. In order to solve parking problems, it needs not only more infrastructure construction, but also to make the parking much more efficient, safe, and intelligent.The traditional parking management technology can not satisfy these needs. The traditional parking lot has some disadvantages such as poor security, low parking efficiency, short communation distance and so on. In order to overcome the problems of parking management system, an intelligent parking system based on CDMA and RFID is introduced in this paper. RFID has the high frequency and active tag. The system makes parking much more effective and safe. The CDMA wireless communication module is adopted in this system, which makes the system performance more perfect. Experimental results show that the communication distance and communication speed of this system are obviously more advanced than either the 485 communication system or the CAN bus communication system. The system not only avoids that one circuit error leads to the paralysis of the entire system, but also makes the guidance system of parking spaces more intelligent, humanity, and scientific.The auto-adapted dynamic grouping anti-collision algorithm is introduced which uses HASH function to determine the grouping. It has the advantages of confidentiality, and system throughput. The article carries out the algorithm of mathematical analysis, the throughput of the system. MATLAB's simulation and the experimental results and conclusion are given. In the parking lot, Dijkstra algorithm, Floyd algorithm and A * algorithm is introduced and A* algorithm is applied to the parking lot shortest path search. With A* algorithm, the parking speed and the parking efficiency are improved a lot.Finally, conclude the main work of this paper, and then make a prospect and plan for the further studies. |
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