Method and system for measuring horizontal relative pose of engine mounting vehicle and aircraft nacelle

The invention belongs to the field of aero-engine hoisting measurement, and discloses a method and a system for measuring the horizontal relative pose of an engine mounting vehicle and an aircraft nacelle, four groups of annular array structured light are mounted on a vehicle body of the engine mounting vehicle, array structured light is projected downwards, and the four groups of annular array structured light form a rectangular array. When the engine installation vehicle carries out in-place operation, because the aircraft nacelle shields the four groups of annular array structured light, the in-place position deviation and angle deviation of the aircraft nacelle can be obtained. And according to the in-place position deviation and the angle deviation of the aircraft nacelle, the engine installation vehicle is adjusted, the position of the aircraft nacelle reaches the in-place position of the engine installation vehicle, and pose adjustment is completed. According to the invention, through the rectangular a