Time interval analysis of interferometer signals for measuring amplitude and phase of vibrations

Wolfgang Wabinski; Hans-Juergen von Martens

doi:10.1117/12.248636

23 August 1996 Time interval analysis of interferometer signals for measuring amplitude and phase of vibrations

Wolfgang Wabinski, Hans-Juergen von Martens

Proceedings Volume 2868, Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (1996) https://doi.org/10.1117/12.248636
Event: Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 1996, Ancona, Italy

Abstract

Various signal processing methods have been developed for application with specifically modified Michelson interferometers and the novel diffraction grating interferometers for the accurate measurement of translational and rotational motion quantities at sinusoidal and shock-shaped time-dependencies. After a survey of these methods and their particular ranges of applicability, the methods based on the determination of the time-intervals between the zero crossings of the interferometer signals are presented. Different versions of time interval determination are described, which are adapted to either homodyne or heterodyne interferometers. It is shown that time interval analysis can be applied in two different ways--either to identify the phase-modulation of the interferometer signal as a measure of the displacement or rotational angle, or to identify the frequency-modulation of the interferometer signal as a measure of the velocity or angular velocity. Results of the theoretical and experimental investigations and of the application of the time interval analysis for the calibration of accelerometers and angular accelerometers are presented.

Citation Download Citation

Wolfgang Wabinski and Hans-Juergen von Martens "Time interval analysis of interferometer signals for measuring amplitude and phase of vibrations", Proc. SPIE 2868, Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (23 August 1996); https://doi.org/10.1117/12.248636

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