Parking Space Detection System Based On Magneto-resistive Sensor And ZigBee

Road construction in the city is becoming better, the parking lots as the main transport infrastructure, the construction of the parking area can effectively alleviate the city traffic congestion, therefore, the state has increased the construction of parking, especially the construction of intelligent parking lots. Parking space detection system as an important part of intelligent parking yard construction, detection function of parking spaces is the basis of parking space detection system operation, and the parking information transmission is the key of improving the efficiency of parking detection system. Therefore, This paper puts forward the research on Parking space detection system based on Magneto-resistive sensor and Zig Bee, in order to improve the utilization efficiency of parking spaces. It has important significance to the construction of intelligent parking lot.This paper on the parking spaces were identified and judged by parking space detection node with reluctance sensor as the main detection function. Building a very powerful Zig Bee wireless sensor network, the parking information data is transferred from one node to another node, and by way of relay is transmitted to the coordinator. And by designing the host computer display platform, Parking lot management can real-time observe occupancy of parking spaces, the implementation of effective management and monitoring of moving vehicle. The main research contents in this paper are as follows:(1) Combined with the characteristic and working principle of the magneto-resistive sensor, based on detailed analysis between network architecture of Zig Bee technology, the network device type and network topology structure, the whole structure design of parking detection system is proposed.(2) On the basis of analyzing hardware structure of parking space detection nodes, the coordinator and router, the main hardware circuit module is designed in detail, includes a sensor module, a microprocessor module, serial communication module, power management module, antenna and balun matching circuit, and to complete the PCB design of the hardware circuit node.(3) The design of I2 C bus driver, extraction of magnetic signal sensor detection, the use of parking space detection algorithm to determine the current state of parking spaces; based on the analysis of Zig Bee protocol stack, the software design of node; application of Visual Studio 2010 to design a upper computer software, to realize the parking information visualization.(4) To test the parking detection system, including function test of parking space detection node, Application of Packet Sniffer protocol analysis software on node network data packet capture, PC interface update by collecting different parking state.The results showed that the detecting node can detect the parking status in different test conditions, verifying the reliability of the algorithm. Zig Bee wireless sensor network data transmission accurate and reliable. PC software is stable, and the data display. The successful operation of parking detection system provides new design ideas for the construction of the realization of intelligent parking lots.