Research On RFID Anti - Collision Algorithm In Emergency Training System

In the process of production, the safety accidents frequently happened. These accidents often lead to serious personnel and property losses. By formulating reasonable effective measures and carrying out the contingency plans and emergency drill, the staff can handle the sudden emergencies well, so that reducing accident loss and making the mishap staying away the danger reasonably. Drill is in a risk-free environment, for training, evaluate and improve the emergency prevention, preparedness, response and recovery ability at the core of the means and the important content of emergency preparedness. In recent years, China’s overall level of emergency drills to improve, but compared with international advanced level there is still a certain gap. Therefore, the use of modern science and technology, to build advanced and standard drill system is imperative. Due to the implementation of the emergency drill need to obtain the spatial data of the staff in real-time, the technology of RFID can track the location information of the exercise person effectively, and send the data to the back-end systems for analyzing and processing, then draw a detailed decisions and realize the automatic management of the emergency drill system. The characteristics of fast, reliability and the high stability of RFID can provide a good support for the system.When RFID tracks the information of the emergency drill, there are multiple electronic tags to send data to reader at the same time within the scope of reader. The signal that reader receives will produce conflict, that is information collision, which will lead to the reader cannot correctly read the data on time, so that it will reduce the performance and recognition efficiency of the RFID system. We must build a collision mechanism between multiple tags to ensure that each tag can be identify correctly if we want to make readers to read these tags at the same time, which determines the identification speed and processing efficiency of the tag in the system. Information collision makes the emergency system cannot correctly read the location information of emergency workers, and then cause the phenomenon such as misinterpreted or leakage, which limits the practical application efficiency of the emergency drill system. As a result, the information collision problem in RFID system is a serious problem in drill system.In this paper, we make a detailed introduction for the system construction and work principle of RFID, and study the steps, advantages and disadvantages of the popular collision algorithms that are based on ALOHA or binary tree.We mainly use MATLAB to simulation and analysis the indicators which are the number of queries, the system throughput and the amount of information, and then evaluate the performance of the algorithm upon the simulation results. We propose a set of collision algorithms based on binary tree, which are applicable to the emergency drill system, the results of analyzing the simulation process by comparing with the existing algorithms show that, the improved algorithm can obviously improve the performance. To further validate the practical efficiency of the algorithm, we constructing a RFID positioning system according to blowout accident model to test the algorithm. We have got the related data about the average search time, tag identification, search times and so on. System can be made within the time limits prescribed for all personnel location information to read, it has success proved the feasibility of the improved algorithm in the drill system.