Title :
A high-speed data acquisition system for ECT based on the differential sampling method
Author :
Wang, Baoliang ; Ji, Haifeng ; Huang, Zhiyao ; Li, Haiqing
Author_Institution :
Dept. of Control Sci. & Eng., Zhejiang Univ., Hangzhou, China
fDate :
4/1/2005 12:00:00 AM
Abstract :
A new capacitance measuring circuit based on differential sampling methods for electrical capacitance tomography has been developed. The measured capacitance is only charged and discharged once and no noise is created by the measurement principle. A capacitance measurement system for 12 electrodes is constructed based on the new measurement circuit. Test results show the data acquisition time for 66 capacitances (for reconstructing one image) is less than 1.25 ms.
Keywords :
capacitance measurement; data acquisition; measurement systems; tomography; capacitance measurement system; differential sampling methods; electrical capacitance tomography; high-speed data acquisition system; measurement circuit; sampling method; Capacitance measurement; Circuit noise; Circuit testing; Current measurement; Data acquisition; Electric variables measurement; Electrical capacitance tomography; Electrodes; Noise measurement; Sampling methods; Capacitance measurement; tomography;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2004.842627
