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Ralf Hesse, Dirk Turschner
Phase- and Amplitude Errorless Filtering of Measurement Signals with Quasi Stationary Fundamental Frequency Component
Keywords: measurement filtering, noice-affected field process signals, phase and amplitude error, free filtering
To avoid sampling problems and suppress signal disturbances, an analog prefilter is often inserted in front of the ADC input port of the process-control computer. Particularly in the case of noice-disturbed field process signals, prefiltering is obligatory. The disadvantage of phase shift and amplitude attenuation of the fundamental frequency component, e. g. the power grid frequency in such measurement signals, can be prevented with the approach described in this paper.
tm – Technisches Messen, Oldenbourg Wissenschaftsverlag
Print ISSN: 0171-8096
Volume: 74, 01/2007
Pages: 14 - 18