DATA ACQUISITION AND PROCESSING FOR PTB'S IMPACT FORCE STANDARD MACHINE

Thomas Bruns, Michael Kobusch

Abstract

The 20 kN Impact Force Standard Machine (IFSM) of PTB’s working group “Impact Dynamics” is supposed to provide traceability for dynamic force by measuring the acceleration of a steel body using a laser-Doppler-interferometer (LDI) [1]. The acceleration itself is derived from time dependant velocity data by numerical differentiation, which is a process prone to noise amplification. Therefore a thorough investigation of the data flow and data analysis algorithms concerning robustness, accuracy and the proliferation of disturbances is necessary. This paper describes the data acquisition system together with three different algorithms for digital demodulation of the LDI signal with regard to the boundary conditions given by the parameters of the equipment.

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IMEKO-TC3-2005-011u.pdf

DOI

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IMEKO TC

TC3 - Measurement of Force, Mass, Torque, and Gravity

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