中国物理B ›› 2016, Vol. 25 ›› Issue (10): 100502-100502.doi: 10.1088/1674-1056/25/10/100502

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Demodulation of acoustic telemetry binary phase shift keying signal based on high-order Duffing system

Bing-Nan Yan(燕并男), Chong-Xin Liu(刘崇新), Jun-Kang Ni(倪骏康), Liang Zhao(赵亮)   

  1. 1 School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
    2 College of Electrical Engineering，School of Xi'an Shiyou University, Xi'an 710065, China;
    3 Xi'an Thermal Power Research Institute Co. Ltd, Block A, Boyuan Science & Technology Building, Xi'an 710054, China
  • 收稿日期:2016-04-11 修回日期:2016-06-16 出版日期:2016-10-05 发布日期:2016-10-05
  • 通讯作者: Bing-Nan Yan E-mail:bnyan@xsyu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 51177117) and the National Key Science & Technology Special Projects, China (Grant No. 2011ZX05021-005).

Demodulation of acoustic telemetry binary phase shift keying signal based on high-order Duffing system

Bing-Nan Yan(燕并男)1,2, Chong-Xin Liu(刘崇新)1, Jun-Kang Ni(倪骏康)1, Liang Zhao(赵亮)3   

  1. 1 School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
    2 College of Electrical Engineering，School of Xi'an Shiyou University, Xi'an 710065, China;
    3 Xi'an Thermal Power Research Institute Co. Ltd, Block A, Boyuan Science & Technology Building, Xi'an 710054, China
  • Received:2016-04-11 Revised:2016-06-16 Online:2016-10-05 Published:2016-10-05
  • Contact: Bing-Nan Yan E-mail:bnyan@xsyu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 51177117) and the National Key Science & Technology Special Projects, China (Grant No. 2011ZX05021-005).

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摘要： In order to grasp the downhole situation immediately, logging while drilling (LWD) technology is adopted. One of the LWD technologies, called acoustic telemetry, can be successfully applied to modern drilling. It is critical for acoustic telemetry technology that the signal is successfully transmitted to the ground. In this paper, binary phase shift keying (BPSK) is used to modulate carrier waves for the transmission and a new BPSK demodulation scheme based on Duffing chaos is investigated. Firstly, a high-order system is given in order to enhance the signal detection capability and it is realized through building a virtual circuit using an electronic workbench (EWB). Secondly, a new BPSK demodulation scheme is proposed based on the intermittent chaos phenomena of the new Duffing system. Finally, a system variable crossing zero-point equidistance method is proposed to obtain the phase difference between the system and the BPSK signal. Then it is determined that the digital signal transmitted from the bottom of the well is ‘0’ or ‘1’. The simulation results show that the demodulation method is feasible.

关键词: acoustic telemetry, BPSK demodulation, Duffing system

Abstract: In order to grasp the downhole situation immediately, logging while drilling (LWD) technology is adopted. One of the LWD technologies, called acoustic telemetry, can be successfully applied to modern drilling. It is critical for acoustic telemetry technology that the signal is successfully transmitted to the ground. In this paper, binary phase shift keying (BPSK) is used to modulate carrier waves for the transmission and a new BPSK demodulation scheme based on Duffing chaos is investigated. Firstly, a high-order system is given in order to enhance the signal detection capability and it is realized through building a virtual circuit using an electronic workbench (EWB). Secondly, a new BPSK demodulation scheme is proposed based on the intermittent chaos phenomena of the new Duffing system. Finally, a system variable crossing zero-point equidistance method is proposed to obtain the phase difference between the system and the BPSK signal. Then it is determined that the digital signal transmitted from the bottom of the well is ‘0’ or ‘1’. The simulation results show that the demodulation method is feasible.

Key words: acoustic telemetry, BPSK demodulation, Duffing system

中图分类号:  (Nonlinear dynamics and chaos)

  • 05.45.-a
05.40.-a (Fluctuation phenomena, random processes, noise, and Brownian motion)