Ft. Kuhn et Pa. Vanhalderen, DESIGN OF AN ACTIVE-DIFFERENTIATOR-BASED CAPACITANCE TRANSDUCER FOR ELECTRICAL CAPACITANCE TOMOGRAPHY, Measurement science & technology, 8(8), 1997, pp. 947-950
This paper focuses on the development of new sensor electronics for el
ectrical capacitance tomography to increase the measurement accuracy a
nd, accordingly, to enhance the system performance in terms of image r
esolution, and the data acquisition speed. The new system relies on th
e use of the unknown capacitance in an active differentiator. Applying
an appropriate input signal to the differentiator gives an output whi
ch can easily be translated into the capacitance.