Research For Expending The Lifetime Of Hybrid Energy Supply Wireless Sensor Network

Wireless sensor network is a new generation of sensor network which is a combination of sensor technology,distributed information processing technology and communication technology.It has an important influence on the production and life of human beings.Extending the lifetime of the network has an important impact on improving the usability of wireless sensor networks.The research of energy recovery method and routing algorithm has always been an important research direction of network lifetime optimization.The energy recovery method based on hybrid energy supply is an effective method of network life cycle optimization.Although it can extend the life cycle of the network,there are the following problems: The power supply of hybrid energy supply wireless sensor network is greatly affected by environmental factors,which leads to low efficiency of acquisition.Nodes of hybrid wireless sensor network has different acquisition ability,death of less energy nodes will reduce the network performance and lifetime.This paper has done the following work to solve these problems:In order to solve the problem of low efficiency of network collection,this article use solar energy and piezoelectric energy to supply the wireless sensor network under the background of the bridge monitoring system.It designed a trickle charge system for the small and discontinuous characteristics of vibration energy,at the same time,It adopt the method of gradual approximation to realize the maximum power transmission tracking algorithm to improve the efficiency of energy collection.This design of hybrid energy supply system is to improve the environmental adaptability and energy recovery efficiency of wireless sensor network energy supply system,and extend wireless sensor network life.In order to solve the problem of hybrid wireless sensor nodes has different acquisition ability,death of less energy nodes will reduce the network performance and lifetime,this article propose a distributed energy efficient routing algorithm for wireless sensor networks.It can prevent the less energy nodes out of dying from large energy consumption.First,the wireless sensor network is divided into optimal uneven clusters to balance the energy consumption between clusters,This algorithm can improve the probability of the nodes with high energy to be cluster head.And we will set the scope of the cluster head near the base station is less than the cluster head far from the base station.In this way,we can solve the problem of the cluster head near the base station has high energy consumption and high mortality.Second,the algorithm based on particle swarm and ant colony fusion algorithm is used to generate a shortest routing path in the cluster to balance the energy consumption within the cluster,so that the node only needs to communicate with the next node and convert the data to the next node.The data fusion will be passed to the next node,and ultimately passed to the cluster head node.The simulation results show that the algorithm can balance the energy consumption of the hybrid energy supply wireless sensor network,prevent the node without less acquisition capacity from premature death,and improve the performance and life of the network.