Jia, J and Wang, M (2010) A method of kth harmonic demodulation for logarithmically processed sinusoidal signal. In: 6th World Congress in Industrial Process Tomography. WCIPT, 06-09 Sep 2010, Beijing, China. International Society for Industrial Process Tomography , pp. 670-676. ISBN 978-0-853-16322-0
Abstract
Digital Phase Sensitive Demodulation (PSD) is a classical method to demodulate the sinusoidal response voltages in electrical impedance tomography (EIT). However, due to the use of logarithmic amplifiers in a recently developed compact voltageapplied EIT system, the waveform of logarithmically processed sinusoidal signals is no longer in a form of sinusoidal wave. Therefore, the conventional PSD cannot be directly implemented. In this paper, a method based on kth harmonic demodulation is reported, which has been used to demodulate the logarithmically processed sinusoidal signals in the EIT system without the use of inverse process.
Metadata
| Authors/Creators: |
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| Keywords: | phase sensitive demodulation, logarithmically processed sinusoidal signal, Fourier series, spectrum analysis |
| Dates: |
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| Institution: | The University of Leeds |
| Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) > Institute for Particle Science and Engineering (Leeds) |
| Depositing User: | Symplectic Publications |
| Date Deposited: | 26 May 2016 15:09 |
| Last Modified: | 26 May 2016 15:09 |
| Published Version: | http://www.isipt.org/world-congress/6/727.html |
| Status: | Published |
| Publisher: | International Society for Industrial Process Tomography |
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