| Aiming at the disadvantages of the traditional environmental monitoring system based on wireless sensor network,this paper proposes an improved environmental monitoring system.The solar energy supply module is added to the high energy consumption node to solve the problem of energy self-sufficiency.At the same time,the compressed sampling module is designed to reduce the sampling frequency.A mobile node with high compatibility is designed to fuse the sensor networks of each cluster dynamically,which can solve the problem of data missing in the cluster,and increase the robustness of the network.High energy consuming nodes are equipped with GPS and GSM modules simultaneously,which can realize the matching of environmental monitoring parameters and monitoring positions.The three specific contributions of this paper are as follows:(1)In this paper,the main types of environmental monitoring sensors(air and water quality sensors)and their application in wireless sensor networks are analyzed in detail.It introduces the principle of each sensor data acquisition and the acquisition accuracy.The conditioning circuit is designed to process the original signal to meet the requirements of ADC sampling;(2)Increasing energy supply and reducing energy consumption are key issues in prolonging life cycles.the high efficiency solar module is designed,and the AIC(analog-to-information converter)model is designed according to the principle of compressive sensing,which can compress the sparse original signal and reduce the sampling frequency to reduce the sampling energy consumption;(3)When nodes are in complex environment,they are susceptible to interference from other frequency signals in the environment,and the data are missing sometimes.In order to improve the robustness of network,this paper designs a mobile node with high compatibility.It can intelligently identify the channel within the network coverage range and change network topology. |
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