A Fast Active Differentiator Capacitance Transducer for Electrical Capacitance Tomography

W. K. Harteveld1, P. A. van Halderen1, R. F. Mudde1, C. M. van den Bleek2,

H. E. A. van den Akker1 and B. Scarlett2

1Delft University of Technology, Faculty of Applied Sciences, Kramers Laboratorium voor Fysische Technologie, Prins Bernhardlaan 6, 2628 BW, Delft, Netherlands

2Delft University of Technology, Faculty of Applied Sciences, Department of Chemical Process Technology, Julianalaan 136, 2628 BL, Delft, Netherlands

Abstract - This paper describes the development of a sensitive and fast transducer for use in electrical capacitance applications. The sensor works by supplying a short voltage pulse to an active differentiator. The sensor has been tested in a twelve electrode configuration mounted around a cylinder of 30 cm.

Keywords : tomography, capacitance, differentiator, transducer