Development and application of airborne geophysical (magnetic/radiometric) measurement system based on CH-3 UAV

In recent years, with the gradual maturity of UAV technology, UAV airborne geophysical survey technology is becoming a hot research field. However, the weight and space of UAV are small, so it is difficult to carry traditional aerogeophysical equipment. Miniaturization and intelligent automatic operation of aerogeophysical instruments become the key to break through the technology of UAV airborne geophysical survey. Based on the development status of domestic UAVs, the medium-sized CH-3 UAV with a take-off weight of 640 kg, a maximum payload of 180 kg and a lifting limit of 7000 m is selected as the carrier. The hardware of miniaturized UGRS-5 host and gamma-ray spectrometry detector are designed by subunit components. The data acquisition and control software and remote monitoring software are developed. The aviation with up to 5 Nal(Tl) detectors is integrated on CH-3 UAV. Gamma spectrometer and magnetometer. It breaks through the key technologies such as miniaturization of aerial radiometry system, integrated modification of UAV and aerial geophysical equipment and remote operation monitoring. Through the application test of 9721 km and production verification of 80,000 km measuring line, the instrument works stably and satisfies the design requirements. (authors)