A very accurate measurement system for multielectrode capacitive sensors

A very accurate measurement system for multielectrode capacitive sensors

A very accurate capacitance-measurement system consisting of a discrete capacitance-dependent oscillator and a microcontroller has been developed. It can measure multielectrode capacitors with capacitances up to 2 pF, with an accuracy of 100 ppm with respect to a reference capacitor. The resolution...

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Veröffentlicht in:IEEE transactions on instrumentation and measurement 1996-04, Vol.45 (2), p.531-535
Hauptverfasser: Toth, F.N., Meijer, G.C.M., Kerkvliet, H.M.M.
Format: Artikel
Sprache:eng
Schlagworte:
Cables
Capacitance measurement
Capacitive sensors
Capacitors
Circuits
Exact sciences and technology
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Joining processes
Microcontrollers
Multiplexing
Oscillators
Parasitic capacitance
Physics
Sensors (chemical, optical, electrical, movement, gas, etc.)
remote sensing
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Beschreibung
Zusammenfassung:A very accurate capacitance-measurement system consisting of a discrete capacitance-dependent oscillator and a microcontroller has been developed. It can measure multielectrode capacitors with capacitances up to 2 pF, with an accuracy of 100 ppm with respect to a reference capacitor. The resolution amounts to 50 aF with a total measurement time of 300 ms.
ISSN:0018-9456
1557-9662
DOI:10.1109/19.492781