Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for calibrating rotation center based on blade local leading edge curve characteristics

A leading edge and blade technology, which is applied in the field of calibrating the rotation center based on the local leading edge curve characteristics of the blade, and can solve problems such as errors

Active Publication Date: 2020-12-01
SICHUAN UNIV
View PDF8 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese invention patent 201911267259.1 discloses a blade detection method based on line-structured light. This method discloses that the center of the turntable is calibrated by using the feature of the blade leading edge profile with a maximum value on the cross section. Although this method solves the need for calibration in the prior art The error caused by the ball transmission, but it uses the approximate tangent between two points to calibrate the center of the turntable, there is a certain error in itself, and this method has certain limitations, it is only suitable for the front edge contour with a small radius of curvature blade

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for calibrating rotation center based on blade local leading edge curve characteristics
  • Method for calibrating rotation center based on blade local leading edge curve characteristics
  • Method for calibrating rotation center based on blade local leading edge curve characteristics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] In this embodiment, the detection of the cross-sectional profile of the blade is taken as an example to explain in detail the calibration of the center of rotation based on the curve characteristics of the leading edge of the blade and the detection of the cross-sectional profile of the blade provided by the present invention.

[0028] This embodiment provides a high-precision detection method for blade cross-sectional profile based on blade leading edge curve features, including the following steps:

[0029] (1) Calibration of the detection device before blade installation

[0030] like figure 1 As shown, the detection device includes a line structured light sensor 100, and controls the line structured light sensor in the moving coordinate system O-XYZ The translational drive that moves within ( S X、S Y 、S Z ), and the rotary drive that controls the rotation of the turntable W There must be a center of rotation on the turntable; before the blade 200 is installe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for calibrating a rotation center based on blade local leading edge curve characteristics. The method comprises the following steps of: acquiring the blade local leading edge curve characteristics before and after rotation; solving centroid coordinates according to the maximum value in the blade local leading edge curve characteristics before and after rotation; and solving a rotation center according to the centroid coordinates, so as to realize coordinate calibration of the rotation center. Compared with a point calibration method in the prior art, the methoddisclosed by the invention has the advantages that the curve calibration result is more accurate and more conforms to the real rotation center, the method is applied to blade section curve feature detection, and the detection result of the blade is more accurate.

Description

technical field [0001] The invention belongs to the field of blade detection, and in particular relates to a method for calibrating the center of rotation based on the curve characteristics of the local leading edge of the blade. 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. Due to the irregular curved surface of the blade and the different profile of each section height, the blade detection work is more difficult. [0003] Chinese invention patent 201911267259.1 discloses a blade detection method based on line-structured light. This method discloses that the center of the turntable is calibrated by using the feature of the blade leading edge profile with a maximum value on the cross section. Although th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24G01B11/27
CPCG01B11/24G01B11/272G01B11/2504G01B11/2522F04D27/001F04D29/324F05D2240/303F05D2230/72G01B11/002G01B11/2513G01B11/2518
Inventor 殷鸣王宗平郑昊天谢罗峰刘浩浩殷国富
Owner SICHUAN UNIV