Cross-sectional curve feature detection method based on line structured light and its application

Abstract

The invention discloses a detection method and application of a section curve feature based on line structured light. The detection step of the method includes firstly moving the line structured light device from the cylinder to the object to be measured along the X-axis of the support to collect profile data, and to analyze the profile of the cylinder. Carry out circle fitting on the data, and convert the contour data to the data coordinate system of the cylinder contour data; then turn the turntable 180° and move along the X-axis of the support from the cylinder to the object to be measured. Carry out circle fitting on the body contour data, and transform the contour data into the data coordinate system of the cylinder contour data; finally, transform the contour data into the same data coordinate system according to the geometric relationship. Data collection and splicing are carried out through the present invention, the number of data collections is small, and the detection time is saved; the motion control is simple, and only involves the movement of the translation axis and one rotation of the turntable; the coordinate conversion process is convenient; the cross-section of most objects to be measured can be measured, Realize section curve feature detection.

Description

technical field [0001] The invention relates to the field of section curve feature detection, in particular to a line structured light-based section curve feature detection method and its application. Background technique [0002] As a key component in aero-engines, gas turbines, steam turbines and other equipment, blades undertake the important task of converting heat energy into mechanical energy. The shape and quality of blades directly affect the energy conversion efficiency and service life of the whole machine. Because the profile of the blade is an irregular curved surface and the profiles of different section heights are different, it increases the difficulty of blade detection. [0003] At present, the commonly used detection methods are the standard template method and the three-coordinate measurement method. The standard template method is used for the quality control of the blade processing process, and the measurement accuracy is low and the labor intensity is h...

AI Technical Summary

Problems solved by technology

The three-coordinate measurement method has the advantages of strong versatility, high precision, and large measurement range, and is not affected by factors such as the roughness and color of the surface quality of the object; but it has disadvantages such as low measurement efficiency and high measurement cost.

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