Research And Implementation Of Earth Site Monitoring System Based On LoRa Technology

In the existing protection measures of earthen sites,monitoring technology is the main technical means to realize preventive protection.For soil sites in remote areas lacking basic communication facilities,adopting ZigBee,WiFi and other wireless communication technologies has drawbacks such as short communication distance,high energy consumption and poor anti-interference ability.According to the basic requirements of soil site monitoring,this thesis studies and implements a soil site monitoring system based on LORA technology.The main research contents of this thesis are as follows:(1)According to the special historical value of the earthen site and the climate change of the environment,this thesis compares several common wireless communication technologies and combines the characteristics of LOLA technology in the low-power WAN technology with the monitoring and protection of the earthen site.(2)Multi-MSA algorithm.In this thesis,a multi-MSA algorithm is proposed to divide the time slot access stage into ordinary mode and observation mode on the basis of comprehensively considering the different damage degree caused by environmental factors to the soil site monitoring and the disadvantage of the time slot access stage in Lorawan protocol.Among them,the ordinary mode mainly allocates time slots for transmission tasks under normal conditions,while the observation mode mainly allocates time slots for abnormal conditions.The simulation experiment and practical application show that the algorithm is feasible and effective.(3)Theoretical design and implementation of soil site monitoring system.By analyzing the geographical location,environmental climate and monitoring requirements of the earthen site,the hardware platform and equipment selection are completed,and the data collection and transmission of the earthen site and its occurrence environment are realized.The disposal scheme of the possible abnormal situation in the operation of the monitoring system and the real-time display of environmental data are put forward.The earthen site monitoring system designed in this thesis has been deployed and tested in Suoyang City for three months.The experimental results prove that the system works stably on the whole,achieves ultra-long distance transmission and low power consumption,which is helpful for the promotion of the work of cultural preservation.