Research And Implementation Of Self-powered Wireless Detection Network

Wireless sensor network is a new type of network,which integrates sensor technology,microprocessor technology,modern network technology,and wirel ess communication technology.It is a technology that has attracted much attention internationally.With the development of wireless sensor networks,there are more and more applications in real life,and the energy supply problem of sensor nodes in wireless sensor networks has also become prominent: the sensor node battery has limited energy and cannot maintain the node's operation for a long time.The battery needs to be replaced frequently,which will increase the maintenance cost and waste the resources.Aiming at the energy supply of sensor nodes,this paper considers using environmental energy to power them and design a self-powered wireless detection network system.In this paper,a self-powered wireless detection network system is designed.The system consists of a self-powered terminal module,a data forwarding module,and a server.The self-powered terminal module uses solar power to periodically collect target temperature data and send it to the data forwarding module.After the data forwarding module receives the temperature data,it sends it to the server through the GPRS network;After receiving the temperature data,the server displays and saves it.The main design contents of this article are as follows:Analyze the advantages and disadvantages of the energy harvesting scheme,wireless sensor network,and MPPT algorithm,and choose the scheme that is suitable for this system: adopt the solar energy harvesting scheme,Zigbee wireless sensor network,and the open-circuit voltage scaling factor method.In terms of system hardware design,the BQ25504 chip with undervoltage and overvoltage protection and MPPT functions was selected as the energy harvesting and management chip of the system,and circuit design and PCB drawing were performed on it;The CC2530 chip with low power consumption and integrated Z-Stack protocol stack was selected as the system's main control chip,and its circuit design and PCB drawing were performed.In addition,the energy harvesting device,energy storage device and temperature sensor are selected.In terms of system software design,the Z-Stack protocol stack,DS18B20 timing,AT instructions,and server programming were studied,and the following functions were implemented: communication between the coordinator and terminal nodes,DS18B20 temperature data collection,coordination Communication with the SIM800 A module and server programming.Finally,the system was tested.The test results show that the system can collect the target temperature under the condition of solar po wer and display and save it on the server to meet the overall design requirements.