Optimization design of broadband and low noise receiving for helicopter-borne electromagnetic method with pseudo-random coded waveforms

被引：0
|
作者：
Wang Y.-Z. [1 ,2 ]
Liu M. [1 ,2 ]
Zhang J.-L. [1 ,2 ]
Zhu K.-G. [1 ,2 ]
Deng S.-P. [1 ,2 ]
Wang S.-L. [1 ,2 ]
机构：
[1] Key Laboratory of Geo-exploration Instruments, Ministry of Education of China, Changchun
[2] College of Instrumentation & Electrical Engineering, Jilin University, Changchun
来源：
Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) | 2023年 / 53卷 / 10期
关键词：
broadband low-noise air-core coil sensor; helicopter-borne electromagnetic method; high sampling rate receiver; m-sequence; measuring and testing technologies and instruments;
D O I：
10.13229/j.cnki.jdxbgxb.20211364
中图分类号：
学科分类号：
摘要：
In this paper，aiming at the pseudo-random transmitting current of 200 kHz clock frequency，comprehensively considering factors such as sensitivity，signal-to-noise ratio，the resonant frequency of the air-core coil sensor is increased to above 150 kHz when the noise level is as low as 4.86 nT/s；The receiver is based on the PXIe bus，which can realize the acquisition of three-component electromagnetic data，transmitting current and various auxiliary information. The sampling rate can reach up to 1.25 MHz，and the dynamic range is 112.6 dB. Through the integration of multi-channel signals，improved multi-information single-file storage method and data storage protocols through composite time stamping，reliable multi-information storage under massive data is realized. Compared with the CHTEM-II airborne electromagnetic recording system，the throughput is up to 6 times. The test results of various performance indicators prove that the receiving system has a high degree of completion. © 2023 Editorial Board of Jilin University. All rights reserved.
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页码：2982 / 2993
页数：11
相关论文
共 20 条
  • [1] Liu G., Effect of transmitter current waveform on airborne TEM response, Exploration Geophysics, 29, pp. 35-41, (1998)
  • [2] Chen Shu-dong, Lin Jun, Zhang Shuang, Effect of transmitter current waveform on TEM response, Chinese J Geophys, 55, 2, pp. 709-716, (2012)
  • [3] Ziolkowski A, Wright D, Mattsson J., Comparison of pseudo-random binary sequence and square-wave transient controlled-source electromagnetic data over the Peon gas discovery, Norway, Geophysical Prospecting, 59, 6, pp. 1114-1131, (2011)
  • [4] Ziolkowski A, Parr R, Wright D, Et al., Multi-transient electromagnetic repeatability experiment over the North Sea Harding field, Geophysical Prospecting, 58, pp. 1159-1176, (2010)
  • [5] Ziolkowski A, Hobbs B A, Wright D., Multitransient electromagnetic demonstration survey in France, Geophysics, 72, 4, pp. 197-209, (2007)
  • [6] Sorensen K I, Auken E., New developments in high resolution airborne TEM instrumentation, ASEG Extended Abstracts, 2, pp. 1-4, (2003)
  • [7] Eadie T, Legault J M, Plastow G, Et al., VTEM ET: an improved helicopter time-domain EM system for near surface applications, ASEG Extended Abstracts, 1, pp. 1-5, (2018)
  • [8] Wu Xin, Xue Guo-qiang, Fang Guang-you, Development of helicopter-borne transient electromagnetic in China, Progress in Geophysics, 34, 4, pp. 1679-1686, (2019)
  • [9] Wu Xin, Fang Guang-you, Xue Guo-qiang, Et al., The development and applications of the helicopter-borne transient electromagnetic system CAS-HTEM, Journal of Environmental and Engineering Geophysics, 24, 4, pp. 653-663, (2019)
  • [10] Wang Qi, Research on multi-stream data recording system of time domain airborne electromagnetic based on PC104 architecture, (2021)
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