Application of Cesium Optical Pump UAV Aeromagnetic System in Coastal Shallow Water Areas

Aerogeophysical survey is an exploration method that uses aircraft as the carrier, carries geophysical prospecting instruments to detect geophysical field information during flight, and studies the internal structure and material composition of the Earth based on the collected data to solve geological problems. This method is not restricted by terrain and enables efficient and rapid survey operations. At present, the application of low-altitude magnetic survey in iron ore exploration has become quite mature in China. Unmanned aerial vehicle (UAV) aeromagnetic systems are also increasingly sophisticated in such fields as onshore mineral resource exploration and geological structure survey, but their application in marine surveys is still in the initial stage.

The working principle of aeromagnetic survey is that the UAV carries magnetic sensors for magnetic field observation, which specifically consists of seven components: 1. Flight carrier system; 2. Airborne aeromagnetic survey system; 3. Ground control station; 4. Ground magnetic diurnal variation base station; 5. Work auxiliary equipment; 6. Field data preprocessing system; 7. Data interpretation system.

This paper mainly introduces the application of aeromagnetic survey in nearshore submarine pipeline detection. The UFO-CS multi-rotor cesium optical pump aeromagnetic survey system, independently developed and manufactured by Beijing Orangelamp Geophysical Exploration Co., Ltd., is adopted for measurement and data interpretation in this application.