Device and method for measuring deflection angle of flap-slat control plane

The invention provides a device and a method for measuring the deflection angle of a flap-slat control plane. The method comprises the following steps: installing a gear reduction mechanism and an angular displacement sensor on a rotation actuator at the tail end of a flap-slat transmission line system, forming a measurement device, and achieving the measurement of the deflection angle of the flap-slat control plane through the detection of the rotation angle of a torsion bar of the transmission line system. Specifically, the output voltage of the angular displacement sensor is detected, and the deflection angle of the flap and slat control plane is obtained at least according to the detected output voltage. According to the measuring method, the deflection angle of the flap and slat control surface of a large aircraft can be measured, the angular displacement sensor and the gear reduction mechanism are adopted as basic measuring parts, and the problems that in a conventional measuring method, the control pla