Research on Synchronous Excitation and Detection Method for Synthetic Multi-frequency Magnetic Induction Signals

Qiang DU; Kehao ZHANG; Li KE; Chenyang WANG

doi:10.11999/JEIT181083

Volume 41 Issue 9

Sep. 2019

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Qiang DU, Kehao ZHANG, Li KE, Chenyang WANG. Research on Synchronous Excitation and Detection Method for Synthetic Multi-frequency Magnetic Induction Signals[J]. Journal of Electronics & Information Technology, 2019, 41(9): 2108-2114. doi: 10.11999/JEIT181083

Citation:

Qiang DU, Kehao ZHANG, Li KE, Chenyang WANG. Research on Synchronous Excitation and Detection Method for Synthetic Multi-frequency Magnetic Induction Signals[J]. Journal of Electronics & Information Technology, 2019, 41(9): 2108-2114. doi: 10.11999/JEIT181083

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Research on Synchronous Excitation and Detection Method for Synthetic Multi-frequency Magnetic Induction Signals

doi: 10.11999/JEIT181083

School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China

Funds: The National Natural Science Foundation of China (51377109), The Natural Science Foundation of Liaoning Province (LZ2014011)

Received Date: 2018-11-26
Rev Recd Date: 2019-04-22

Available Online: 2019-04-29

Publish Date: 2019-09-10

Abstract

Abstract

Magnetic induction detection technology is a non-contact and non-invasive electrical impedance detection technology. Multi-frequency synchronous detection can simultaneously obtain the impedance information of the tested object at different frequencies. Firstly, the principle of multi-frequency synchronous excitation and detection of magnetic induction signal are studied. Five-frequency excitation signal is synthesized based on Walsh function. Secondly, the performance of synthesized multi-frequency synchronous detection is analyzed, and a synthesized multi-frequency magnetic induction signal synchronous detection system is designed. Finally, the detection experiments of NaCl solution with different conductivities are carried out by synthesizing five-frequency excitation signal and synchronous detection system. The results show that the measurement results of five main harmonics of synthesized five-frequency excitation signal have good linearity. It provides an excitation-detection method for multi-frequency synchronous detection of magnetic induction signal.
- Magnetic induction signal,
- Synthetic multi-frequency signal,
- Walsh function,
- Conductivity measurement

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References(15)

References

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