Design Of Visualized Mudslides Infrasound Monitoring And Early Warning System Based On ARM Cortex-M7

Debris flows are usually caused by sinister mountainous areas such as mountains and valleys.Due to some harsh natural behaviors such as heavy rainfall,there are many special mountain floods mixed with earth and gravel.The mudslides are raging and devastating,and many of the building facilities that often rush into human settlements have a great threat to human society.China is also a country with frequent mudslides,and most of the causes are persistent heavy precipitation.Among them,the southwestern part of China has rich geological structures,many terrains and gullies,often with strong crustal movements,and abundant rainfall during the rainy season.Therefore,mudslide disasters are more likely to erupt and directly endanger the lives and property of local people.Therefore,monitoring and early warning of debris flow disasters has become an important study.At present,many national organizations in the world are committed to the research of this technology,and have achieved certain results.At the same time,China attaches great importance to this technology research.Compared with the debris flow monitoring and early warning instruments at home and abroad,there are some common problems,such as high design cost,complicated maintenance at the later stage,and low alarm rate.Therefore,this design proposes a debris flow with low cost and high efficiency of signal processing.Monitoring and early warning mechanisms to achieve early warning of debris flow.This paper introduces the overall design of the system.The system is based on the characteristics of the debris flow acoustic signal and combined with the hardware and software systems and corresponding algorithms in the embedded technology.The hardware part of the system selects a special infrasonic signal sensor to realize the acquisition of the analog voltage signal of the infrasound signal,and performs analog-to-digital conversion to obtain the corresponding digital discrete signal.The marginal spectrum obtained by the HHT Hilbert transform can be used to analyze the spectral characteristics of the signal and determine whether there is a debris flow subsonic signal.The marginal spectrum can display its waveform on the LCD screen of the embedded software system,and the software system also has functions of data file storage,time setting,SMS alarm,data transmission and the like.The system selects STM32F767IGT6 chip as the main control chip and transplants the real-time operating system UCOS-III to complete multi-task operation such as data capture,processing and storage.At the same time,it is equipped with a 7-inch LCD display to realize the visual touch operation of the system.Finally,through the overall functional test,the design roughly completed the design requirements and achieved the corresponding functions.