Title :
Sinusoidal fitting using exact linearization applied to bioimpedancimetric measurements
Author :
Madrid, Rossana E. ; Spinelli, Enrique M. ; Felice, Carmelo J.
Author_Institution :
Inst. de Bioingenieria, Univ. Nacional de Tucuman, Argentina
fDate :
29 Oct-1 Nov 1998
Abstract :
Microbial growth can be continuously followed up by measuring the interface impedance Zi of two electrodes immersed in a culture medium. A new method based on sinusoidal fitting is used to reduce measurement errors. It applies an exact linearization with which it is possible to obtain a linear relationship of the parameters to be estimated. This permits the application of the least squares procedure, producing pure sinusoidal waves, which greatly reduce the error in the determination of the interface impedance amplitude and phase components
Keywords :
bioelectric phenomena; biological techniques; biomedical measurement; curve fitting; electric impedance measurement; least squares approximations; linearisation techniques; measurement errors; microorganisms; bacterial growth; bioimpedancimetric measurements; electrodes immersed in culture medium; exact linearization; interface impedance; least squares procedure; linear regression; microbial growth; phase components; pure sinusoidal waves; reduced measurement errors; sinusoidal fitting; Additive white noise; Bioimpedance; Dielectric measurements; Electrodes; Equations; Frequency; Impedance measurement; Instruments; Microorganisms; Parameter estimation;
Conference_Titel :
Engineering in Medicine and Biology Society, 1998. Proceedings of the 20th Annual International Conference of the IEEE
Conference_Location :
Hong Kong
Print_ISBN :
0-7803-5164-9
DOI :
10.1109/IEMBS.1998.747228
