Research on Structure Optimization and Measurement Method of a Large-range Deep Displacement 3D Measuring Sensor

Area of Science:

• Geophysics
• Geological Engineering
• Sensor Technology

Background:

• Deep displacement monitoring is crucial for geological hazard research.
• Previous work established a geophysical method using magneto-electric sensing arrays for 3D deep displacement measurement.

Purpose of the Study:

• To optimize the sensing unit structure and improve measurement accuracy and range.
• To develop a new mathematical model for real-time 3D deep displacement measurement.

Main Methods:

• Structural optimization of sensing units using 3D printing.
• Improvement of permanent magnet parameters through extensive experiments.
• Development of a new mathematical model based on data query algorithms and polynomial least square curve fitting.

Main Results:

• Real-time conversion of sensor outputs to relative displacement and tilt angles.
• Achieved measuring errors of 0-1.5 mm for horizontal and vertical displacement.
• Extended the measurement range from 0-30 mm to 0-50 mm.

Conclusions:

• The revised 3D deep displacement sensor meets the needs for high-precision monitoring of rock and soil deformation.
• The sensor is suitable for both initial deformation stages and large deformation monitoring during rapid changes.
• The optimized sensor and measurement methods enhance geological hazard assessment capabilities.