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An Inductive Sensor for Two-Dimensional Displacement Measurement.

Liang Wu1, Shi Xu1, Ziqiang Zhong1

  • 1Engineering Research Center of Mechanical Testing Technology and Equipment (Ministry of Education), Chongqing University of Technology, Chongqing 401135, China.

Sensors (Basel, Switzerland)
|March 29, 2020
PubMed
Summary
This summary is machine-generated.

This study introduces a novel planar inductive sensor for precise two-dimensional (2D) displacement measurement. The sensor utilizes electromagnetic induction for accurate 2D positioning, validated through experimental results.

Keywords:
CORDIC algorithminductive sensorpulsating magnetic fieldspiral coilstwo-dimensional displacement measurement

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Area of Science:

  • Electromagnetism
  • Sensor Technology
  • Robotics and Automation

Background:

  • Accurate two-dimensional (2D) displacement measurement is crucial for advanced positioning systems.
  • Existing methods may have limitations in precision or complexity for certain applications.

Purpose of the Study:

  • To propose and validate a novel planar inductive sensor for simultaneous and independent measurement of 2D displacements.
  • To demonstrate the feasibility of using electromagnetic induction for high-precision 2D positioning.

Main Methods:

  • A planar inductive sensor design featuring an m x n matrix primary coil and a 2 x 2 matrix secondary coil.
  • Excitation of the primary coil with 4 kHz alternating current to generate a pulsating magnetic field.
  • Induction of modulated signals in the secondary coil, with amplitudes varying based on secondary coil displacement along x- and y-axes.
  • Application of a Coordinate Rotation Digital Computer (CRDC) algorithm for resolving planar displacements.

Main Results:

  • Finite element analysis and numerical simulations confirmed the electromagnetic model and algorithm performance.
  • Experimental validation using a sensor prototype demonstrated the feasibility of the proposed scheme.
  • Measurement error analysis was conducted to assess the sensor's accuracy.

Conclusions:

  • The proposed planar inductive sensor offers a feasible solution for accurate 2D displacement measurement.
  • The integration of electromagnetic induction and the CRDC algorithm enables precise 2D positioning.
  • The developed sensor technology has potential applications in robotics, automation, and precision measurement systems.