Design And Implementation Of Mountain Landslide Data Acquisition Device Based On Multi-Sensor

Landslide is a natural phenomenon that the mountain structure,affected by the external environment,slides along its own unstable structural surface.Before the landslide occurring,there is a long-term energy accumulation.And there are some precursors while happening.The sensor can monitor the characteristics of the landslide effectively.Then we can predict the probability and the time of landslide occurrence by analyzing and processing the feature data of the mountain information.It can achieve the goal that protects the safety of people's lives and property in a certain extent.Therefore,it is meaningful to establish a landslide monitoring and early warning system.And the landslide data collection device is the front-end collection device of the system,which provides reliable data supporting for the analysis and early warning.So it is an essential foundation for the system to work normally.To realize the landslide data acquisition device,the thesis mainly applies embedded processing technology,sensor technology,super capacitor energy storage technology,sensor information fusion technology,wireless communication technology and so on.The device uses multi-sensors to achieve the collection of mountain parameters such as rainfall,soil temperature and humidity,soil pressure,pore water pressure,vibration intensity,and displacement.What's more,it judges the abnormal data by the 3? criterion.Then it deals with the abnormal data by replacing and supplement.The thesis uses the autocorrelation function method to extract the stable characteristics of the sensor data and adopt multiple regression equation to achieve distributed preliminary fusion of data.Finally,the data is sent to the concentrator through the 433 MHz wireless radio frequency communication technology.And the accuracy and reliability of the communication are guaranteed by the confirmation mechanism,the failed retransmission mechanism,the data verification technology,and the redundant path transmission technology.In addition,In this thesis,solar cells,combined with super capacitor banks are used to achieve independent field power supply of the device.It expands the energy storage capacity of the device and has a certain redundancy function to ensure the normal operation.The landslide data collection device,designed in the thesis,was tested by the mountain model built in the laboratory.The results show that the real-time collection of multi-sensor data,the pre-processing of the data,stable feature extraction and preliminary fusion can be realized by the device.and the data is successfully sent to the concentrator.Meanwhile,the power suppling part can provide a stable source of energy for the power protection device.The experimental results show that the landslide data collection device can realize the design function,and achieve the expected goals in stability,reliability,real-time,low power consumption and accuracy.Compared with the traditional comprehensive collection device,the comprehensiveness and the accuracy of information have been improved to a certain extent,which provides a reliable data basis for the system to analyze the probability of landslide monitoring.There is practical significance in the prediction and early warning of landslides.