DocumentCode :
2092351
Title :
Measurement uncertainty estimation of a virtual instrument
Author :
Caldara, S. ; Nuccio, S. ; Spataro, C.
Author_Institution :
Dipt. di Ingegneria Elettrica, Palermo Univ., Italy
Volume :
3
fYear :
2000
fDate :
2000
Firstpage :
1506
Abstract :
The law of uncertainty propagation is applied to a PC-based virtual instrument. According to the “guide to the expression of uncertainty in measurement”, the measuring model and the various sources of uncertainty have been taken into account. The expressions of the combined output uncertainty in various basic digital signal processing blocks, are obtained starting from each input sample absolute accuracy, without taking into account the parameters which regard the overall behavior of an acquisition board, such as the effective number of bits. In order to verify this procedure, the results obtained by means of the theoretical analysis, are compared with the ones obtained from numerical simulation. Then the results of experimental tests are presented to validate the proposed method. In particular, a virtual instrument, with a complex measurement chain for flicker evaluation, has been considered. The results are in a good agreement with the theoretical and numerical ones
Keywords :
ISO standards; measurement uncertainty; signal sampling; virtual instrumentation; ADC; DAQ; ISO guide; PC-based virtual instrument; basic DSP blocks; coherent sampling; combined output uncertainty; complex measurement chain; flicker evaluation; law of uncertainty propagation; measurement uncertainty estimation; measuring model; numerical simulation; sources of uncertainty; Data acquisition; Digital signal processing; Instruments; Measurement uncertainty; Numerical simulation; Particle measurements; Signal processing algorithms; Software measurement; Testing; Transducers;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2000. IMTC 2000. Proceedings of the 17th IEEE
Conference_Location :
Baltimore, MD
ISSN :
1091-5281
Print_ISBN :
0-7803-5890-2
Type :
conf
DOI :
10.1109/IMTC.2000.848724
Filename :
848724
Link To Document :
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