Method and equipment for measuring length of fan blade

The invention relates to the technical field of fan blade detection, in particular to a method for measuring the length of a fan blade. The method for measuring the length of the fan blade comprises the steps that S100, visible light data under a two-dimensional coordinate system of a hub and three-dimensional point cloud data under a three-dimensional coordinate system of the hub are received, the visible light data and the three-dimensional point cloud data are calibrated, related point cloud information of the fan blade is extracted, and the orientation angle of a fan is detected; s200, combining the three-dimensional coordinate system to a two-dimensional coordinate system; s300, detecting visible light data of the key points, and establishing a model for calculating the length of the blade; and S400, obtaining a calculation result of the first blade length. The method for measuring the length of the fan blade has the following advantages that on-site operation is facilitated, the resolution ratio is high