Research on Centroid Localization Method of Underground Space Ground Electrode Current Field Based on RSSI

Area of Science:

• Geophysics
• Electrical Engineering
• Computer Science

Background:

• Communication and localization are critical in underground environments, especially during emergencies like collapses.
• Traditional wireless systems struggle with signal penetration and reliability in subterranean settings.
• Existing localization methods lack accuracy and robustness in dynamic underground conditions.

Purpose of the Study:

• To develop a strong penetration information transmission system for underground spaces.
• To propose an improved centroid localization method using received signal strength indication (RSSI) for enhanced accuracy and reliability.
• To address communication interruptions and enable effective localization in collapsed underground environments.

Main Methods:

• Analysis of ground current field signal propagation characteristics in underground spaces.
• Construction of an attenuation model combining RSSI ranging.
• Introduction of an improved weighted centroid localization algorithm with optimized parameters.

Main Results:

• Achieved an average positioning error of 7.47 m in a 10,000 sq meter underground area.
• Demonstrated a 32.32% reduction in positioning error compared to the weighted centroid localization algorithm.
• Showcased a 62.74% reduction in positioning error compared to the traditional centroid localization algorithm.

Conclusions:

• The proposed method offers independent underground positioning, overcoming reliance on external links.
• This technology provides crucial support for underground life-saving operations and disaster rescue.
• The system presents significant practical value and promising prospects for enhancing emergency response capabilities.