Nodes Of Sensor Based On Environmental Energy

Wireless sensor networks can realize remote dynamic monitoring of targets and have a wide range of applications.However,wireless sensor nodes are often distributed in dangerous or complex areas,and it is not easy to replace the batteries manually,so the energy problem becomes an important problem hindering the development of sensor network.To reduce the power consumption of the nodes and find a battery of alternative energy can effectively solve this problem.Therefore,the research on the micro energy acquisition system should be carried out while adopting the energy-saving strategy.Aiming at the energy consumption of nodes,a data fusion algorithm based on Kalman filter is adopted to reduce the node's transmission of repetitive and inaccurate information through the optimal estimation of information,thus the energy consumption of nodes can be reduced effectively.Aiming at the micro energy acquisition system,firstly,according to the output characteristics of solar panels,the fuzzy sliding mode control algorithm is used to track the maximum power point of the solar cell,and the method of power section utilization is used to increase the output energy utilization of the solar panel.For the collection of RF energy,the energy acquisition circuit is designed and the booster circuit is increased to reduce the waste of energy.Then based on the working principle and characteristics of super capacitor and Li-ion battery,a hybrid energy storage model is constructed.The super capacitor stores low-power energy,and lithium-ion battery stores relatively high-power energy,thereby reduced the cycle times of lithium ion battery and increased the battery life expectancy.Finally,in order to distribute the energy rationally to ensure the coordination of each module,an energy management system with comparators,single chip and switching circuits as the core is designed to manage the entire micro-energy acquisition system.In terms of energy saving,the simulation results show that the data fusion algorithm can effectively reduce the transmission of miscellaneous information,reduce the energy consumption of nodes and increase the life cycle of the node.In terms of self-provide,the experiments show that the micro energy acquisition system can meet the needs of the normal work of the node energy,and it can maintain long-term and stable working node.