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Research on Channel Characteristics and Electrode Electrical Performance of Earth Current Field Information
Jingang He1,2, Zhong Su1,3, Zhan Xu3
1School of Automation, Beijing Institute of Technology, Beijing 100081, China.
Sensors (Basel, Switzerland)
|July 14, 2023
Summary
Improving tunnel rescue communication relies on earth current field technology. Optimizing grounding electrodes by increasing depth and radius effectively reduces impedance, enhancing information transmission capacity for trapped personnel.
Area of Science:
- Electrical Engineering
- Geophysics
- Emergency Response Technology
Background:
- Tunnel engineering accidents pose significant challenges for emergency rescue, particularly in maintaining communication.
- Existing communication methods are often disrupted by collapses, necessitating robust alternative transmission channels.
- Earth current field information transmission technology offers a potential solution for transmitting data through subterranean environments.
Purpose of the Study:
- To investigate and resolve technical issues in information transmission for tunnel rescue scenarios.
- To analyze the electromagnetic characteristics of earth media and the electrical performance of grounding electrodes.
- To enhance the efficiency and capacity of information transmission for rescue personnel and trapped individuals.
Main Methods:
- Utilized electromagnetic simulation software (Maxwell) with a finite element algorithm.
- Developed a three-dimensional model to analyze current field information transmission via grounding electrodes.
- Investigated the impact of electrode array, depth, and radius on impedance and transmission efficiency.
Main Results:
- Earth impedance is primarily influenced by medium resistivity, an uncontrollable factor.
- Reducing the contact impedance of earth electrodes is crucial for improving electric dipole antenna performance.
- Parallel electrode connection, increased depth, and larger electrode radius effectively decrease contact impedance and boost transmission capacity.
Conclusions:
- Optimizing grounding electrode configurations significantly enhances information transmission capacity in tunnel rescue.
- Proper selection of operating frequencies for electromagnetic waves enables wireless signal transmission through strata.
- Earth current field technology provides a viable method for reliable communication during tunnel emergency situations.
Keywords:
channel characteristicscurrent fieldelectrical performancegrounding electrodeinformation transmissionMore Related Videos
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