Lightweight Unmanned Aerial System for Time-Domain Electromagnetic Prospecting - the Next Stage in Applied UAV-geophysics
| Autor: | M.G. Tokareva, Sergey Bukhalov, Ayur Bashkeev, Marina G. Persova, Nikolay Grebenkin, A. V. Parshin, Yuriy Davidenko, Sergey Iakovlev |
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| Rok vydání: | 2021 |
| Předmět: |
010504 meteorology & atmospheric sciences
UAV Terrain electromagnetic prospecting 010502 geochemistry & geophysics Parallel lcsh:Technology 01 natural sciences lcsh:Chemistry remote sensing TDEM Prospecting General Materials Science Sensitivity (control systems) Time domain lcsh:QH301-705.5 Instrumentation 0105 earth and related environmental sciences Fluid Flow and Transfer Processes lcsh:T Process Chemistry and Technology Transmitter General Engineering Geophysics lcsh:QC1-999 Computer Science Applications Depth sounding lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 TEM UAS applied geophysics Stage (hydrology) lcsh:Engineering (General). Civil engineering (General) lcsh:Physics Geology |
| Zdroj: | Applied Sciences Volume 11 Issue 5 Applied Sciences, Vol 11, Iss 2060, p 2060 (2021) |
| DOI: | 10.13140/rg.2.2.21200.23042 |
| Popis: | Nowadays in solving geological problems, the technologies of UAV-geophysics, primarily magnetic and gamma surveys, are being increasingly used. However, for the formation of the classical triad of airborne geophysics methods in the UAV version, there was not enough technology for UAV-electromagnetic sounding, which would allow studying the geological environment at depths of tens and hundreds of meters with high detail. This article describes apparently the first technology of UAV-electromagnetic sounding in the time domain (TDEM, TEM), implemented as an unmanned system based on a light multi-rotor UAV. A measuring system with an inductive sensor—an analogue of a 20 × 20 or 50 × 50 m receiving loop is towed by a UAV, and a galvanically grounded power transmitter is on the ground and connected to a pulse generator. The survey is carried out along a network of parallel lines at low altitude with a terrain draping at a speed of 7–8 m/s, the maximum distance of the UAV’s departure from the transmitter line can reach several kilometers, thus the created technology is optimal for performing detailed areal electromagnetic soundings in areas of several square kilometers. The results of the use of the unmanned system (UAS) in real conditions of the mountainous regions of Eastern Siberia are presented. Based on the obtained data, the sensitivity of the system was simulated and it was shown that the developed technology allows one to collect informative data and create geophysical sections and maps of electrical resistivity in various geological situations. According to the authors, the emergence of UAV-TEM systems in the near future will significantly affect the practice of geophysical work, as it was earlier with UAV-magnetic prospecting and gamma-ray survey. |
| Databáze: | OpenAIRE |
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