Volume 6 Number 2 (Feb. 2011)
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JCP 2011 Vol.6(2): 359-367 ISSN: 1796-203X
doi: 10.4304/jcp.6.2.359-367

Weak Signal Detection Research Based on Duffing Oscillator Used for Downhole Communication

Xuanchao Liu, Xiaolong Liu
School of Electronic Engineering, Xi’an Shiyou University, Xi’an, China

Abstract—Weak signal detection is very important in the downhole acoustic telemetry system. This paper introduces the Duffing oscillator weak signal detection method for the downhole acoustic telemetry systems. First, by solving the Duffing equation, analyzed the dynamics characteristic of Duffing oscillator and weak signal detection principle; and then on this basis, built Duffing oscillator circuit based on the Duffing equation, by circuit simulation to study the Duffing circuit sensitive to different initial parameters, conducted a detailed analysis for how the different parameters impacted the system statuses and the low-pass filter with simplicity and availability was proposed for signal demodulation. The results show that the method could effectively detect the weak changes of input signal and suppress strong noise; it is feasible, advanced and practical used for downhole acoustic telemetry system.

Index Terms—weak signal detection, Duffing oscillator, Duffing chaos circuit simulation, downhole communication, downhole acoustic telemetry system

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Cite: Xuanchao Liu, Xiaolong Liu, "Weak Signal Detection Research Based on Duffing Oscillator Used for Downhole Communication," Journal of Computers vol. 6, no. 2, pp. 359-367, 2011.

General Information

ISSN: 1796-203X
Abbreviated Title: J.Comput.
Frequency: Bimonthly
Editor-in-Chief: Prof. Liansheng Tan
Executive Editor: Ms. Nina Lee
Abstracting/ Indexing: DBLP, EBSCO,  ProQuest, INSPEC, ULRICH's Periodicals Directory, WorldCat,etc
E-mail: jcp@iap.org
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