NON-LINEARITY OF SENSORS AND DYNAMIC CALIBRATION

Thomas Bruns

Abstract

Sensors for the dynamic measurement of mechanical quantities or motion quantities are sometimes subject to a non-linear input-output characteristics. In the case of calibration this may result in deviations of classical calibration results using different methods or different ranges.<BR />The contribution is analysing the effects of non-linear sensor behaviour based on a virtual acceleration sensor. With a known mathematical sensor model and numerical simulations some typical effects are described by example and a simple measurement procedure is proposed to analyse and quantify an unknown non-linearity. The effectiveness of the proposal is demonstrated by a simulated comparison with other methods and the known ”true” non-linearity.

Keywords

sensor characteristics, dynamic calibration, non-linearity, harmonic distortion

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IMEKO-WC-2015-TC22-429.pdf

DOI

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IMEKO TC

TC22 - Vibration Measurement

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