Abstract: In order to measure the aircraft fuel in any flight attitude, a new aircraft fuel measurement system is proposed. First, the non-contact liquid level sensing technology based on computer vision was used to measure the oil level in the fuel tank. Then we employed the CAD model to model the fuel tank and correct the flight attitude error. Real-time observation and three-dimensional reconstruction of the current liquid level outside the fuel tank are realized, and the fuel in the fuel tank is not required to be energized, thereby avoiding electromagnetic interference and circuit wear problems of the conventional measurement method, and greatly improving the safety and reliability of the fuel system. Accurately measuring the remaining fuel quantity in real time is of great significance to the functions of the aircraft’s fuel supply control, system status monitoring, and fault diagnosis isolation. Compared with the traditional method, the oil quantity measurement method has the advantages of digitization, high intelligence degree, strong anti-interference ability and high reliability.

Key words: fuel tanker, fuel measuring, computer vision, non-contact measurement, attitude error correction