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Microsphere-Based Microsensor for Miniature Motors' Vibration Measurement.

Kaichuan Xu1, Chunlei Jiang2, Qilu Ban1

  • 1Key Laboratory of Intelligent Optical Sensing and Manipulation of the Ministry of Education, National Laboratory of Solid State Microstructures, Engineering Research Center of Precision Photonics Integration and System Application of the Ministry of Education, College of Engineering and Applied Sciences, Institute of Optical Communication Engineering, Nanjing University-Tongding Joint Lab for Large-Scale Photonic Integrated Circuits, Nanjing University, Nanjing 210023, China.

Sensors (Basel, Switzerland)
|November 25, 2023
PubMed
Summary

This study introduces a novel microsphere microsensor for measuring miniature motor shaft (MMS) vibrations in confined spaces. The device utilizes photonic nanojets for precise vibration detection with high accuracy.

Keywords:
microsensormicrosphereminiature motorphotonic nanojetvibration measurement

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Area of Science:

  • Optical Engineering
  • Mechanical Engineering
  • Nanotechnology

Background:

  • Accurate vibration measurement is crucial for miniature motor diagnostics.
  • Existing sensors face limitations in confined spaces and precision.

Purpose of the Study:

  • To develop a compact microsensor for miniature motor shaft (MMS) vibration measurement.
  • To leverage photonic nanojets (PNJ) for enhanced sensing capabilities.

Main Methods:

  • A microsensor comprising a stretched fiber and a 5 μm microsphere was fabricated.
  • Photonic nanojets were generated for precise focusing and light enhancement on the MMS.
  • Two microsensors were employed for simultaneous axial and radial vibration measurement.
  • Calibration was performed using a standard vibration source.

Main Results:

  • The microsensor precisely focuses light on the MMS surface, exceeding the diffraction limit.
  • Simultaneous measurement of axial and radial vibrations was achieved.
  • Calibration demonstrated measurement errors below 1.5%.

Conclusions:

  • The microsphere-based microsensor effectively measures MMS vibrations in confined spaces.
  • The PNJ phenomenon enables high-precision, enhanced optical detection.
  • The technology holds promise for industrial applications in miniature motor diagnostics.