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

Nanying Shentu¹, Sheng Wang¹, Qing Li¹

¹College of Mechanical and Electrical Engineering, China Jiliang University, Hangzhou 310018, China.

Sensors (Basel, Switzerland)

|March 22, 2020

Summary

This study presents an enhanced geophysical sensor for precise 3D deep displacement monitoring in geological hazards. The improved sensor offers a wider measurement range and reduced error for rock and soil deformation.

Keywords:

contour deep displacement monitoring geological disaster horizontal displacement mathematical modeling vertical displacement

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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.