| With the release of the 2025 Action Plan of China Manufacturing,more and more manufacturing industries have begun to undergo transformation and upgrading.“Internet + Auto”,“Internet + Manufacturing”,“Intelligent Production” and “Unmanned Factory” have become more popular.The novel concept also represents the development goal of China's manufacturing industry in the future.Through mass entrepreneurship,the innovative and innovative development strategy will transform China's manufacturing industry from large to strong and from low to high.Compared with the industrial powers of Europe and the United States,the penetration rate of high-end manufacturing automation testing has far exceeded that of China's manufacturing industry.With the continuous upgrading of China's manufacturing industry,the demand for automated testing of manufacturing enterprises will also come.The more vigorous.For the highly sophisticated industries such as the aerospace industry,the development of 3D measurement technology will promote the development of production,testing,maintenance,etc.in these areas,and can improve efficiency,reduce costs and improve product life,so three-dimensional measurement Technology will increasingly become the focus of measurement research,focusing on the pain points and difficulties of measurement,through innovative research and research related technologies,breaking through the limitations of the original technology to meet the actual measurement needs.Study the various principles of optical measurement technology and combine them with a variety of sophisticated optical instruments to form a three-dimensional measurement system.Among them,the 3D data scanner is a successful example of the application of classical optical measurement technology.However,traditional 3D data scanners have their own limitations,such as real-time synchronous scanning combined with laser and camera,and real-time data acquisition,which is very demanding on the quality of the laser and the real-time acquisition performance of the camera.The close cooperation between them makes it impossible to meet the requirements of measuring high precision,which leads to the inability of 3D measurement technology.Facing the various limitations of 3D data scanners,this paper will improve the traditional 3D data scanner in measurement,and build a new 3D data scanner by using spectral confocal displacement sensors.There is an improvement in measurement accuracy and stability before improvement.This three-dimensional data scanner will be used to measure aero-engine turbine blades and process the acquired data and model the quadratic curve of the leading edge portion.The main work of this thesis is in the aspect of modeling.Through the introduction and research of the previous algorithms,the advantages and disadvantages of the previous algorithms are studied in detail.A new modeling algorithm is developed for its shortcomings.Since the leading edge of the blade can be regarded as a tangent and A combination of arcs or Bezier curves,and the previous algorithm is mainly modeled by a combination of circle fitting and straight line fitting,so if it encounters a non-circular line in the leading edge structure of an aero-engine blade or In the case of Bezier curve segment,the previous algorithm can not adapt well to this change,so this paper will fit the two fitting phases based on the line fitting of the straight line black plug paradigm and the curve fitting based on Bezier curve.Combined with the quadratic curve modeling of the leading edge section of the blade;in order to verify the effect of the algorithm,a large number of simulation data will be used for the simulation experiment,and the data will be modeled by the algorithm and a traditional algorithm.The algorithm and the traditional algorithm show that the proposed algorithm has a wide range of applications compared with the traditional modeling algorithm for the arc-shaped blade leading edge.High stability and strong advantages.The main contents of this paper are as follows:(1)Access to relevant literature(including domestic and foreign literature)and analysis of several contact and non-contact three-dimensional optical measurements.Investigate the current research status of the arc-shaped and non-circular turbine blade leading edge modeling,and the corresponding advantages,disadvantages,application scope and specific implementation steps of the existing modeling algorithms.The various components of the 3D scanning system.In this section,the design of the control platform,spectral confocal sensor,and computer data acquisition and processing software is detailed.(2)Details the various system components of the new 3D scanning system.In this chapter,the three-dimensional motion control capabilities of the x,y,and z axes of the control platform,the detailed technical parameters of the spectral confocal sensor,and the design of the computer data acquisition and processing software are described.(3)Discuss the related principles of the proposed modeling algorithm in detail,analyze the advantages and disadvantages of the linear black plug paradigm and the Bezier curve,and apply the Bezier curve fitting and the straight line fitting to the blade leading edge.The modeling and related improvements to improve the accuracy and stability of the modeling algorithm.(4)Explain in detail the algorithm-related operational flow proposed in this paper,and compare the two existing algorithms to non-arc-shaped blades compared with the existing modeling algorithms(based on adaptive iterative least squares blade trailing edge parameter estimation).The pros and cons of the leading edge fitting effect,and at the same time verify the feasibility of the algorithm and the modeling effect. |
PDF Full Text Request