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Differential Structure of Inductive Proximity Sensor.

Yi-Xin Guo1, Cong Lai2, Zhi-Biao Shao3

  • 1School of Electronic and Information Engineering, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an, Shaanxi 710049, China. macray@126.com.

Sensors (Basel, Switzerland)
|May 16, 2019
PubMed
Summary
This summary is machine-generated.

A new differential inductive proximity sensor (IPS) improves aircraft displacement measurements by enhancing temperature adaptation and accuracy. This method reduces computational load and radio frequency emissions for reliable aviation applications.

Keywords:
airborne electronic equipmentdifferential structuredisplacement measurementsinductive proximity sensorlinear approximation methodlook-up tablesmall electric current pulse

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Area of Science:

  • Aerospace Engineering
  • Sensor Technology
  • Measurement Science

Background:

  • Inductive proximity sensors (IPS) offer non-contact, durable displacement measurement suitable for aviation.
  • Aviation applications impose strict requirements, including temperature drift, computational limits, and RF emission constraints.
  • Existing IPS methods face challenges in meeting these specialized aviation demands.

Purpose of the Study:

  • To propose a novel differential structured IPS measurement method for aviation applications.
  • To address limitations of conventional IPS, such as temperature drift and computational intensity.
  • To enhance accuracy, reliability, and compliance with aviation environmental standards.

Main Methods:

  • A differential IPS structure with distinct sensing coils was developed.
  • Numerical separation of resistance and inductance components was employed for improved temperature adaptation.
  • A dimension-reduced look-up table method was integrated to minimize computational complexity.
  • A low-current pulse excitation technique was utilized to reduce RF emissions.

Main Results:

  • The differential IPS achieved numerical decoupling of the sensing coil's vector impedance using 61 look-up table units.
  • Measuring sensitivity significantly increased from 135.5 LSB/0.10 mm to 1201.4 LSB/0.10 mm.
  • Linear approximation distance error was reduced from 99.376 μm to -3.240 μm.

Conclusions:

  • The proposed differential structured IPS method effectively overcomes temperature drift and computational limitations.
  • The enhanced sensitivity and accuracy make it highly suitable for demanding aviation displacement measurements.
  • This technique offers significant advantages over existing similar measurement methods in the aerospace field.