Coupling of Very Low Frequency Through-the-earth Radio Signals to Elongated Conductors

Ralchenko, M.; Roper, Mike; Svilans, Markus; Samson, C.

doi:10.1109/tap.2017.2694758

Cited by 11 publications

(2 citation statements)

References 32 publications

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“…By measuring the three magnetic field components near the conductor, it was found that there is a coupling effect in the signal, which is caused by the current inside the slender conductor. This discovery can be used to predict the feasibility of strong penetration information transmission links in different settings and optimize the positions of the transmitting and receiving ends [3][4][5][6][7].…”

Section: Related Workmentioning

confidence: 99%

Research on Channel Characteristics and Electrode Electrical Performance of Earth Current Field Information Transmission Technology

et al. 2023

Sensors

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Starting from the need for emergency rescue information transmission in tunnel engineering accidents, this article focuses on researching and solving the technical problems of information transmission between rescue personnel and trapped personnel after tunnel engineering collapse accidents, before and during the rescue process. The research objects are the information transmission channel and grounding electrode in the earth current field information transmission technology, and the electromagnetic characteristics of the earth medium and the electrical performance of the grounding electrode are studied and analyzed using the electromagnetic simulation software Maxwell based on finite element algorithm, establish a three-dimensional model based on the transmission of current field information of the ground electrode, analyze the effects of the electrode array, electrode depth, and radius on impedance. Research has shown that the impedance of the earth is related to the resistivity of the medium and is not a human-controllable factor. To reduce the contact impedance of an electric dipole antenna, one should start with the contact impedance of the earth electrode. The impedance of the transmitting end is an important factor affecting the efficiency of information transmission; parallel connection of multiple grounding electrodes, increasing the depth of grounding electrode penetration into the soil layer, and increasing the radius between grounding electrode pairs are all effective methods to reduce the contact impedance of electric dipole antennas, thereby improving information transmission capacity. To achieve wireless information transmission through the stratum, by appropriately selecting the operating frequency of electromagnetic waves, a certain distance of signal transmission can be achieved.

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Section: Related Workmentioning

confidence: 99%

Research on Channel Characteristics and Electrode Electrical Performance of Earth Current Field Information Transmission Technology

et al. 2023

Sensors

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“…The numerical solution accuracy was compared and analyzed. Study the distribution and variation of the focusing current field, and determine the range of the focusing effect current ratio coefficient [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Signal Design, Detection, and Identification Technology for Ground-Penetrating Communication Based on Ground Electrode Current Field

He¹,

Su²,

Zhan³

et al. 2023

Preprint

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In this work, we studies the principle of ground electrode current field through ground communication technology, signal design, and optimal working mode of excitation source, so as to adapt the working mode, working frequency, and transmission medium condition of signal transmission. Through waveform design, energy is concentrated in the main conduction direction, which is beneficial for signal filtering at the receiving end and achieving high reliability data transmission; On this basis, on-site environmental testing was conducted to verify the detection and recognition technology of weak signals. Signal design and detection recognition are a very important part of the grounding electrode current field through ground communication technology. The grounding electrode current field through ground communication technology is mainly applied to solve the problem of communication between rescue personnel and trapped personnel before and during tunnel engineering collapse and rescue.

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On Wireless Communication in Underground Mine System

Chowdhury

Pramanik

Roy

2019

Lecture Notes in Electrical Engineering

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Coupling of Very Low Frequency Through-the-earth Radio Signals to Elongated Conductors

Cited by 11 publications

References 32 publications

Research on Channel Characteristics and Electrode Electrical Performance of Earth Current Field Information Transmission Technology

Research on Channel Characteristics and Electrode Electrical Performance of Earth Current Field Information Transmission Technology

Signal Design, Detection, and Identification Technology for Ground-Penetrating Communication Based on Ground Electrode Current Field

On Wireless Communication in Underground Mine System

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