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A high-speed data acquisition system for ECT based on the differential sampling method

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4 Author(s)
Baoliang Wang ; Dept. of Control Sci. & Eng., Zhejiang Univ., Hangzhou, China ; Haifeng Ji ; Zhiyao Huang ; Haiqing Li

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.

Published in:

Sensors Journal, IEEE  (Volume:5 ,  Issue: 2 )

Date of Publication:

April 2005

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