A Study on Using AD5933 to Realize Soft-Sensing Measurement of Conductance and Capacitance

Abstract : A conductance and capacitance test system was designed in this paper. AD5933 a new chip for impedance testing was used in it. By designing the test system, and testing the impedance of a model, which is a resistor in parallel with a capacitor, under different frequency (range from1000Hz to 100kHz). The information of impedance, real part, and imaginary part of the model under the frequency points were get. Based on this, the internal relations between conductance, capacitance, impedance, real part and imaginary part were carefully analyzed, using the soft-sensing method established the capacitance support vector machine (SVM) regression model on MATLAB. The regression model is the relation between resistance, impedance and capacitance. The test results showed that the test relative error is small in the capacitance range (0.1 pf~33 pf) and the conductance range (9.05*10-3s~3.8*10-5s), the biggest, smallest and average test error of capacitance are -2.9%, 0.2%, 1.27% respectively. The study showed that using AD5933 and the soft-sensing method to realize the multi-parameter test is feasible.
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Communication dans un congrès
Daoliang Li; Chunjiang Zhao. Third IFIP TC 12 International Conference on Computer and Computing Technologies in Agriculture III (CCTA), Oct 2009, Beijing, China. Springer, IFIP Advances in Information and Communication Technology, AICT-317, pp.471-478, 2010, Computer and Computing Technologies in Agriculture III. 〈10.1007/978-3-642-12220-0_69〉
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Chuanjin Cui, Haiyun Wu, Yueming Zuo. A Study on Using AD5933 to Realize Soft-Sensing Measurement of Conductance and Capacitance. Daoliang Li; Chunjiang Zhao. Third IFIP TC 12 International Conference on Computer and Computing Technologies in Agriculture III (CCTA), Oct 2009, Beijing, China. Springer, IFIP Advances in Information and Communication Technology, AICT-317, pp.471-478, 2010, Computer and Computing Technologies in Agriculture III. 〈10.1007/978-3-642-12220-0_69〉. 〈hal-01055411〉

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