Design Of Urban Environmental Monitoring System Based On Internet Of Things

In the process of rapid economic development in the 21 st century,after people the quality of life has been greatly improved,people are more concerned about the living environment,from concern for food hygiene and safety has been transferred to concern about the environmental conditions of the city in which they live.In order to improve people the quality of life,an environmental monitoring system should be built outdoors.In the organization structure of the environmental monitoring system,the monitoring nodes are arranged according to the actual monitoring needs,so as to ensure that the monitoring of the environment and the collection of data information in the region can be satisfied.Firstly,the related technology of environmental monitoring system is summarized,and the main ZigBee technology and 4G technology are analyzed in detail.In order to overcome the disadvantage of short transmission distance of ZigBee technology,the system uses short-distance ZigBee technology and long-distance 4G technology to realize short-distance data acquisition and long-distance transmission.Secondly,the general design of the urban environment monitoring system of the Internet of things is carried out,and the hardware part of the environment monitoring system is designed according to the hardware circuit of the system.The CC2530 chip is used as the core of the short-distance wireless transmission.The Z-TACK protocol stack of TI Company is used to set up ZigBee wireless sensor network to complete the short-distance collection and transmission of environmental data between nodes.The 4G gateway is composed of STM32F103RCT6 single chip microcomputer and 4G module.The ZigBee data frame can be converted into 4G data frame to realize the long-distance information transmission in heterogeneous network,and the data can be transmitted to the computer and mobile phone.The system needs long-term outdoor work,and the power supply module circuit is designed in detail.Finally,the software of the system is designed,the ZigBee wireless network is tested,and the function of the whole system is tested in PC and mobile phone.The data is transferred to the computer and mobile interface to display the collected environmental data such as temperature,humidity,PM2.5 and CO in real time.