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Design and Implementation of an Inductive Proximity Sensor with Embedded Systems.

Septimiu Sever Pop1, Alexandru-Florin Flutur1, Alexandra Fodor1

  • 1Applied Electronics Department, Faculty of Electronics, Telecommunications and Information Technology, Technical University of Cluj-Napoca, 400027 Cluj-Napoca, Romania.

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Summary
This summary is machine-generated.

This study introduces a novel inductive proximity sensor (IPS) using frequency response for accurate non-contact distance measurement. The developed model achieves 33 µm accuracy within a 10 mm range, offering a reliable solution for industrial applications.

Keywords:
LC oscillatordisplacement measurementembeddedfrequencyinductive proximity sensor

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Area of Science:

  • Electrical Engineering
  • Sensor Technology
  • Metrology

Background:

  • Non-mechanical contact distance measurement is crucial for industries like automotive and aviation.
  • Inductive proximity sensors (IPS) are favored for short-distance measurements due to their size and reliability.
  • Traditional IPS models often measure response signal amplitude, limiting precision.

Purpose of the Study:

  • To propose and implement a novel Inductive Proximity Sensor (IPS) model based on frequency response.
  • To develop a compact IPS structure using microcontrollers and embedded technology.
  • To demonstrate accurate distance measurement capabilities of the proposed IPS model.

Main Methods:

  • An LC circuit was utilized to generate a persistent oscillatory state by periodic energy injection.
  • A microcontroller-based signal generator and distance measurement circuit were implemented.
  • The frequency response of the LC circuit was analyzed to determine distance.

Main Results:

  • The experimental model successfully measured distance with an accuracy of 33 µm within a 10 mm range.
  • A nonlinear relationship between frequency and distance was identified.
  • A linear drift of frequency with temperature was observed and accounted for.

Conclusions:

  • The proposed frequency response-based IPS model offers high accuracy for non-contact distance sensing.
  • Embedded technology enables the creation of compact and efficient IPS systems.
  • The method provides a viable alternative to traditional amplitude-based IPS measurements.