A Whole Closed Space Intrinsically Safe GPR System for Detection of Geological Hazard Sources in Coal Mines
| Autor: | Xu Xianlei, Ma Zheng, Sun Tao |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Computer science
business.industry Bandwidth (signal processing) Impedance matching Coal mining Geotechnical Engineering and Engineering Geology Antenna efficiency Radiation pattern Front and back ends Electromagnetic shielding Ground-penetrating radar Electrical and Electronic Engineering business Marine engineering |
| Zdroj: | IEEE Geoscience and Remote Sensing Letters. 19:1-5 |
| ISSN: | 1558-0571 1545-598X |
| DOI: | 10.1109/lgrs.2021.3055396 |
| Popis: | Detailed detection of geological hazard sources is an important and yet challenging problem that remains unsolved. In this letter, we propose a whole closed space intrinsically safe Ground Penetrating Radar (GPR) system for geological hazard detection in coal mine roadway. Compared with many existing GPRs for half-space, this GPR system is characterized by achieving a stable radiation pattern and improved gain throughout the bandwidth. The improved performance for the system is achieved by the newly microwave front end design, adding round corners on the antenna radiation surface to improve radiation efficiency, designing resistive loading for better impedance matching, and optimizing shielding cavity dimensions to eliminate environmental interference. For design validation, a field experiment in mine roadway conditions is conducted, and the results show that the developed system has a good performance in mining roadway with depth detection accuracy at 0.5 m and direction detection accuracy at 1.5 m. |
| Databáze: | OpenAIRE |
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