Electromagnetic Antenna Based on Transmit-receive Crossing Coil

Electromagnetic Antenna Based on Transmit-receive Crossing Coil

Jun Zhang  Yangcheng Xu Yunbo Li  Fenghao Yang  Yanqing Wu 

Chongqing Research Institute of China Coal Technology & Engineering Group Corporation, Chongqing 400039, China

School of Geosciences and Info-physics, Central South University, Changsha 410083, China

Department of Mathematics and Statistics, York University, Toronto M3J1P3, Canada

Corresponding Author Email: 
xuyangcheng1983@163.com
Page: 
126-141
|
DOI: 
https://doi.org/10.18280/mmc_a.900202
Received: 
25 April 2017
|
Accepted: 
28 May 2017
|
Published: 
30 June 2017
| Citation

OPEN ACCESS

Abstract: 

The small multiturn overlapping coil is always used in mine transient electromagnetic exploration. For the effect of turn-off, the first field dominates total field during the off-time of transmitting current and early after off-time. This may cause unresponsive for shallow low resistance anomaly. So we suggest that use cross coil for first field eliminating: Analyzes  the distribution of first field inside and outside the transmitting coil during the off-time; Deduces the analytic expression of magnetic flow for first field inside the receiving coil; Worked out the coefficient of position for receiving coil is 0.93 when the magnetic flow for first field inside the receiving coil is 0. According to laboratory experiment for low resistance model and site detecting for tunnel filled with water, we verify the availability of cross coil for first field eliminating and low resistance anomaly detecting. It provides technical support to mine transient electromagnetic exploration.

Keywords: 

mine transient electromagnetic, antenna, first field eliminating, transmit-receive crossing coil.

1. Introduction
2. Principle
3. Determining the Positions of the Receiving and Transmitting Antennas
4. The Measured Attenuation Curve
5. Conclusion
Acknowledgments

The project is supported by National Science and Technology Major Project of the Ministry of Science and Technology of China (Grant No. 2016ZX05045-002-0003 and 2016ZX05045004-007).

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