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Proceedings Paper

Amplitude and phase calibration of accelerometers in the nanometer range
Author(s): Alfred Link; Joachim Gerhardt; Hans-Juergen von Martens
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Paper Abstract

The paper presents a method for measuring of the amplitude and phase angle of a sinusoidal vibration in the nanometer range. The method is proposed for the calibration of accelerometers in the frequency range from 1 kHz to 50 kHz using heterodyne interferometer signals. The developed method is based on quadrature signals generated by digital signal processing. The vibration signal is regenerated as discrete-time phase sequence of quadrature signals using an arc tangent subroutine. The displacement amplitude and the phase angle of the vibration are obtained by applying least squares estimation to the phase sequence. The theoretical background and details of the generation of quadrature signals and of the estimation of displacement amplitude and phase angle are given. Results of an investigation into the errors due to various disturbing parameters are presented. The performance of the proposed signal processing method was examined by means of computer simulation and experimental data taken from both a test measuring system and a measuring system for the calibration of accelerometers.

Paper Details

Date Published: 23 August 1996
PDF: 12 pages
Proc. SPIE 2868, Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (23 August 1996); doi: 10.1117/12.248669
Show Author Affiliations
Alfred Link, Physikalisch-Technische Bundesanstalt (Germany)
Joachim Gerhardt, Physikalisch-Technische Bundesanstalt (Germany)
Hans-Juergen von Martens, Physikalisch-Technische Bundesanstalt (Germany)

Published in SPIE Proceedings Vol. 2868:
Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

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