THE IMPACT OF THE RANDOMIZATION OF THE QUANTIZATION ERROR ON THE ACCURACY OF MEASURING SYSTEMS APPLYING A DIGITAL MEASURING ALGORITHM
Journal Title: Metrology and Measurement Systems - Year 2005, Vol 12, Issue 2
Abstract
In measuring systems applying a digital measuring algorithm, the measurement process is divided into two stages: Stage 1 consists in the acquisition and storage of the system's input data, based on which the value of the measurand is estimated in stage 2. The uncertainty of the stored data is translated into the uncertainty of the result of the estimation, i.e. of the result of the measurement. When analog-digital conversion with a dither signal is applied in the data acquisition system (DAQ), the quantization error is modified and the uncertainty is reduced. The present paper discusses the mechanism of the modification of the quantization error and describes the characteristics of the uncertainty of a DAQ system applying a-d conversion with a dither signal.
Authors and Affiliations
ANNA DOMAŃSKA
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