Title :
An AC current source for capacitance-based displacement measurements
Author :
Nerino, R. ; Sosso, A. ; Picotto, G.B.
Author_Institution :
Istituto Elettrotecnico Nazionale Galileo Ferraris, Torino, Italy
Abstract :
A 100 kHz bandwidth AC current generator used to monitor displacements by means of capacitive sensors is described. The displacement signal, linearly related to the capacitive sensor admittance, is monitored in 1 kHz bandwidth with an accuracy of 4*10/sup -4/ by means of a wideband high impedance buffer circuit. Performance and applications are discussed.
Keywords :
buffer circuits; calibration; capacitance measurement; constant current sources; displacement measurement; electric admittance measurement; electric sensing devices; 1 kHz; 100 kHz; AC current generator; AC current source; capacitance-based displacement measurements; capacitive sensor admittance; capacitive sensors; displacement; displacement signal; linearly related signal; wideband high impedance buffer circuit; AC generators; Bandwidth; Capacitance measurement; Capacitive sensors; Circuits; Current measurement; Displacement measurement; Impedance; Monitoring; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1996 Conference on
Conference_Location :
Braunschweig, Germany
Print_ISBN :
0-7803-3376-4
DOI :
10.1109/CPEM.1996.547142
