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Dynamic Characterization of Optical Coherence-Based Displacement-Type Weight Sensor.

Zhengchuang Lai1,2, Zhongjie Ouyang1,3, Shuncong Zhong1,4

  • 1Institute of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350108, China.

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Summary

This study demonstrates an optical coherence displacement weight sensor with superior dynamic performance. Enhancements using pole-zero placement significantly reduced response time and overshoot for faster, more accurate weight measurements.

Keywords:
displacement typedynamic characteristicsoptical coherenceweight sensor

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Area of Science:

  • Mechanical Engineering
  • Sensor Technology
  • Optical Metrology

Background:

  • Dynamic characteristics are critical for high-performance weight sensors.
  • Accurate and fast weight measurements require robust sensor dynamics.
  • Optical coherence displacement offers a novel approach to weight sensing.

Purpose of the Study:

  • To numerically simulate and analyze the dynamic characteristics of an optical coherence displacement weight sensor.
  • To compare its dynamic performance against traditional strain sensing methods.
  • To enhance the sensor's dynamic performance through advanced control techniques.

Main Methods:

  • Finite element analysis (FEA) for numerical simulation.
  • Harmonic response and transient dynamic analysis for frequency and time domain exploration.
  • Negative step response experiments for performance validation.
  • Pole-zero placement for dynamic performance enhancement.

Main Results:

  • The optical coherence displacement sensor exhibited superior dynamic performance and reduced conditioning time compared to strain sensing.
  • Dynamic performance metrics were established for the optical sensor.
  • Pole-zero placement reduced overshoot to 4.72% and response time to 0.0132 s.

Conclusions:

  • The non-contact optical coherence displacement weight sensor provides enhanced dynamic capabilities.
  • Optimized dynamic performance broadens operational bandwidth and response capabilities.
  • This technology is promising for applications requiring fast and accurate weight measurements.