Research On Routing Algorithm In Wireless Sensor Networks And Implementation Of Anti-theft System Of Old Trees

Wireless sensor network(WSN)is a kind of communication network,which uses sensors as sensing elements of information and wireless communication network as transmission path of information and integrates multiple information technologies including chip technology,wireless network communication technology and software technology,etc.Generally the information it obtains is gathered to the unit of information manageable for processing and analysis.Wireless sensor network has been widely used in the field of remote monitoring,process control,information collection and so on.The research on the theory and application of wireless sensor network is of great significance to promote the progress of science and technology and social development.Wireless sensor networks usually have a large number of nodes.After an arrangement,heavy workload has to be done if its energy is replenished frequently.Moreover,some nodes are placed in places where people are not easy to touch,which makes it difficult for maintenance,so the general requirement is that the network can continuously work for a period of time.The size of the nodes is small and its energy is limited,so trying to reduce the energy loss per unit time of the wireless sensor network is very important,and the design of routing algorithm with low power consumption has become an important research direction to reduce energy loss of the network.In this paper,a routing algorithm for non uniform clustering(BECA algorithm)is designed to prolong survival time of the network and reduce energy consumption of the cluster nodes that are close to the collection nodes.In this algorithm,a selection method of the cluster heads is designed,the number and distance of the nodes in a cluster are limited,the isolated nodes are properly handled,and an inter cluster multi hop routing method with approximate shortest path is also designed.The simulation results show that compared with LEACH algorithm and DEEC algorithm,the BECA algorithm has the following advantages: greatly increased continuous working time of the nodes,obviously delayed the time of the initial death of nodes,most balanced the number of clusters,and the maximal amount of data sent to the collection node in the same time;compared with UCRA algorithm and EEUC algorithm,the survival time of the network is longer and the utilization rate of the nodes' energy is higher and the energy balance is better in the BECA algorithm.After the research and analysis on the theory and technology of the wireless sensor network,an ancient trees anti-theft system that is based on wireless sensor network is designed according to the situation that the ancient trees in the forest are so precious that they are easy to be stolen.The system is composed of the terminal node which sends the information,the collection node which receives the information,the communication module which sends the information to the host computer and the computer software which gives an alarm.During the system works,every terminal node sends a message that indicates the node is normal to the collection node every 8 seconds,then collection node receives the message and sends it to the host computer software through the communication module,while host computer software alarms if it hasn't received the message from a node for consecutive 5 times and logs the information in a file.The system focuses on the design of the information processing program and it is programmed using VC++ in three aspects of the users' authentication,Socket communication and the alarm of the host computer software.After multiple tests and troubleshootings,the system can transmit information reliably and alarm timely,and the results meet the expected demand.