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A method for high-precision measuring differential transformer asymmetry.

Xiao-Tian Yang1, Ming Hu1, Cheng-Rui Wang1

  • 1MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China.

The Review of Scientific Instruments
|October 20, 2023
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Summary
This summary is machine-generated.

This study presents a novel method for precisely measuring differential transformer asymmetry, a key error source in space inertial sensors. The developed technique achieves high precision, crucial for advancing sensitive electronic components.

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Area of Science:

  • Electrical Engineering
  • Aerospace Engineering
  • Sensor Technology

Background:

  • Differential transformers are critical in high-precision capacitive position sensing for space inertial sensors and electrostatic accelerometers.
  • Transformer asymmetry is a primary contributor to position sensing offset, a significant error source in space inertial sensors.
  • Accurate evaluation of differential transformer asymmetry is essential for improving sensor performance.

Purpose of the Study:

  • To propose and validate a novel method for assessing differential transformer asymmetry.
  • To develop a prototype circuit for testing transformer samples.
  • To achieve high-precision measurement of differential transformer asymmetry.

Main Methods:

  • Development of a specialized method for differential transformer asymmetry assessment.
  • Implementation of a prototype circuit for experimental validation.
  • Measurement of asymmetry in a transformer sample using the developed method.

Main Results:

  • The proposed method successfully assessed differential transformer asymmetry.
  • The prototype circuit enabled precise measurement of the transformer sample.
  • The asymmetry measurement precision reached 0.6 ppm for a transformer with -278.2 ppm asymmetry.

Conclusions:

  • The developed method provides a high-precision approach to evaluate differential transformer asymmetry.
  • This technique is vital for mitigating position sensing offset errors in space inertial sensors.
  • The findings contribute to the advancement of high-performance aerospace sensing technologies.