A scanning path planning method for blade dense point cloud acquisition based on laser ranging

Abstract

The invention discloses a scan path programming method obtained by leaf dense point cloud on the basis of laser ranging and solves the limitation of laser measurement field depth and measurement distance and the problem that the complex curve surface measurement needs the rotation axis and the measurement accuracy difference, and the noise in the front rim area and the back rim area is big. The scan path programming method comprises steps of intercepting the section couture curve of the leave shape surface, performing segmentation and extending on the section counter curve, generating a measurement path according to the segmented curve, calculating the normal angle mean value of different measurement areas as the measurement angle for measuring the leave curve surface by the laser distance measurement sensor, obtaining the dense four sheet point cloud data, unifying the four-sheet point cloud data to the same one coordinate system to obtain the complete sheet point cloud data, and performing integral optimization on the point cloud data to obtain the final high accuracy dense point cloud data. The beneficial effects are that: the invention fully utilizes the advantages that when the laser distance measurement principle head and the object to be detected form a certain angle, the measurement accuracy is not affected, front-back rim high curvature small radius area measurement is realized, the measurement accuracy is high and the speed is fast.

Description

[0001] Technical Field The present invention belongs to the field of precision measurement, and in particular relates to a scanning measurement path planning method in the process of acquiring dense point clouds of blades with complex curved surfaces based on laser ranging. technical background [0002] Blades are the core components of turbomachinery such as aero-engines and gas turbines. The quality of their processing and manufacturing directly determines the energy conversion efficiency, operation safety and service life of the engine. There are many measurement parameters and so on. Therefore, how to realize efficient and accurate blade profile measurement and ensure its manufacturing quality has become an urgent problem to be solved in the blade processing and manufacturing industry. At the same time, efficient and accurate blade profile measurement is suitable for the measurement planning of dense points of complex profile parts such as aero-engines and gas turbine blad...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems existing in the measurement of blades with complex curved surfaces based on the principle of laser ranging, the invention discloses a path planning method based on the principle of laser ranging to realize rapid and precise acquisition of dense point clouds of blades on complex curved surfaces, and to complete the blade profile and details, such as blade entry Accurate point cloud data acquisition of exhaust edge, blade root and tenon, this method has the characteristics of fast speed, high precision and low noise

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