Low-cost and Low-Size Interferometer for Accelerometers Replacement

• Abstract:

  This paper presents the development and characterization of a self-mixing interferometer, especially designed to replace normal accelerometers, used for measuring vibrations to detect defects or malfunctions. The sensor’s design emphasizes minimal footprint with a straightforward baseband signal decoding enabled by the intrinsic distortion in the SMI waveform, resulting in vibration measurement of the target, with a resolution better than 10 nm. Experimental validation on the ISE OneX test bench, equipped with a commercial axial accelerometer and fault-simulated bearings, demonstrates that the SMI system delivers a signal-to-noise ratio and sensitivity at least two orders of magnitude higher than the accelerometer, particularly in the low-frequency range. These results confirm the potential of the proposed interferometer as a high-performance, contactless solution for industrial condition monitoring and its suitability for integration into advanced diagnostic platforms.
• Download:

  IMEKO-TC2-2025-017.pdf
• DOI:

  tc2-2025.017

Event details:

• IMEKO TC:

  TC2
• Event name:

  IMEKO TC2 PhotoMet 2025
• Title:

  2025 IMEKO TC2 International Symposium on Modern Photonic Metrology

  PhotoMet 2025 - Shaping the Future of Photonic Metrology

• Place:

  Modena, ITALY
• Time:

  1 September 2025 - 3 September 2025