Research On 3D Monitoring Technology For Deep Displacement Of Rock And Soil Mass Based On Magnetoelectric Effect

The complex geological conditions in China lead to frequent geological disasters,and study of monitoring technology and devices provides accurate and powerful theoretical and data support for disaster prevention and reduction.When geological disasters such as landslides and collapses occur in rock and soil mass,relative displacements and cracks will occur within them.As the most important part of geological disaster monitoring,deep displacement monitoring of rock and soil mass provides accurate and effective data support for geological disaster monitoring,early warning and forecasting.Based on the mutual inductance effect,Hall effect and gravity inclinometer principle,combined with data analysis and mathematical modeling,this paper proposed a deep displacement three-dimensional monitoring technology of rock and soil mass based on magnetoelectric effect to realize real-time deep displacement monitoring of rock and soil mass.The main research contents and results of this article are as follows:(1)In order to reduce the limitations of the existing monitoring technology,according to analyzed the advantages and shortcomings of the existing deep displacement monitoring technology and studied the principles of mutual inductance effect,Hall effect and azimuth measurement,the author proposed a deep displacement monitoring technology integrating mutual inductance effect and Hall effect.(2)Aiming at the measuring principle and the complex environment of depth rock and soil mass,the sensor is selected through experiments,and the structure of the measuring device is designed to increase the measuring range as much as possible.The structure can make the measuring device stably and for a long time work in the environment of depth rock and soil mass.The fixing device of the permanent magnet and Hall sensor is designed,which is convenient for the assembly of the measurement device and increases the stability of the structure,so as to ensure the experimental of the measurement model.(3)Design data collection experiments.Build an experimental device,write a host computer software to control the experimental motion platform and collect data,which conduct experiments and collect experimental data.(4)Establish a displacement measurement model with numerical analysis and design a verification experiment of the measurement model.Based on the principles of the magnetoelectric induction effect and the Hall effect,a relationship model between the mutual inductance voltage Ur,the Hall voltage Uh,the inclination angle?0,and the displacement(?R,?Z)was established.The relationship model is verified by experimental.According to the experimental results,the horizontal displacement and vertical measurement errors are-1.5mm to 1.5mm,the horizontal displacement measurement range is 0 to 60mm,and the vertical displacement measurement range is 0 to 60mm.In conclusion,the measurement system researched in this paper can effectively monitor the deep displacement of rock and soil mass in real time.