Wireless Sensor Network Localization Algorithm And Practical Application

In the practical application of wireless sensor networks,the location information of network nodes is crucial in the entire network.Designing a node location algorithm with high precision,high efficiency and low energy consumption is a key issue for modern researchers.In this paper,the positioning accuracy of the wireless sensor network positioning algorithm,the number of sensor nodes and network deployment are deeply studied,and the specific research scheme is given.The feasibility and advancement of the theoretical scheme proposed in this paper are verified by simulation results.The main research contents and innovations of the thesis are summarized as follows:1.The research background and significance of wireless sensor networks,research status at home and abroad,node ranging error,positioning accuracy,and application fields are reviewed.Several common clock synchronization algorithms and node localization algorithms are introduced from different angles.2.Aiming at solving the problem of single positioning result with wireless sensor network,a distributed positioning algorithm for multi-sensor networks is proposed.Eight sensor nodes are selected as reference nodes,and all node clocks are synchronized by pulse-coupled clock synchronization algorithm.Based on the synchronization of each node clock,the sound signals from the sound source are measured to reach each node by using four different network topologies.In order to improve the positioning accuracy of the nodes,the four network topologies are repeatedly simulated for 1000 times,and the linear iterative algorithm is used to accurately predict the positioning results,so as to obtain accurate positioning results.3.Aiming at the problem of solving the source location with multi-sensor network,combined with the global optimization ability of genetic algorithm and the fast local search ability of quasi-Newton algorithm,the arrival time difference location method of genetic-quasi-Newton hybrid algorithm is proposed.In order to verify the accuracy of the hybrid algorithm,the MATLAB simulation diagrams of the horizontal and vertical axes of the quasi-Newton algorithm and the genetic-quasi-Newton hybrid algorithm are given respectively.In sharp contrast,it is concluded that the genetic-quasi-newton hybrid algorithm uses fast convergence?high precision and good stability conclusions.4.Aiming at the problem of insufficient accuracy of coal mine target positioning method,an underground target location method based on arrival time is proposed.Since the arrival time positioning method is mainly affected by the timing error,it is necessary to establish a positioning method and a differential error suppression algorithm for a specific environment in the well.Through the error analysis of the positioning results by single-mode ranging,dual-mode ranging and differential error suppression algorithms,the conclusion that the differential error suppression algorithm can effectively suppress the equipment delay and the timer frequency offset problem can be performed on unknown nodes.It gives accurate positioning results.Finally,the main work of the full text is summarized,and some problems worthy of further study are put forward.