On-line monitoring method of overall three-dimensional deformation of wind wheel blades in working states

A technology of wind rotor blades and working status, which is applied in the field of three-dimensional deformation measurement of the whole structure, and can solve the problems of failure to fully reflect the displacement and strain of wind rotor blades, limited measuring range, sensor damage and failure, etc.

Inactive Publication Date: 2013-10-02
WENZHOU UNIVERSITY
View PDF5 Cites 33 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research on the damage mechanism and damage identification of wind rotor blades often needs to measure the deformation field of the surface of the wind rotor blade under the action of wind load, but the traditional detection method is static detection, and the load applied in the test is higher than that of the wind rotor blade in actual work. The force is s

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
  • On-line monitoring method of overall three-dimensional deformation of wind wheel blades in working states
  • On-line monitoring method of overall three-dimensional deformation of wind wheel blades in working states
  • On-line monitoring method of overall three-dimensional deformation of wind wheel blades in working states

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The invention provides an online monitoring method for three-dimensional deformation of a wind turbine blade in a working state, which includes the following steps:

[0020] (1) Spray paint on the surface of the wind rotor blade to be tested to form random speckles; the color contrast of the two paints is required to be high, and black and white matt paint is generally used, of course, other paints are also acceptable.

[0021] (2) Select the center of the hub of the wind turbine as the fixed mark point, and select another mark point at the root of each blade (where the stiffness is relatively high). The mark point at the root of each blade adopts a mark of a different shape, for example, three blades Use circles, triangles, squares, etc. respectively;

[0022] (3) Select two suitable positions in front of the wind rotor blades to set up two industrial digital cameras. In order to measure the three-dimensional displacement, the straight line from the two positions to t...

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 provides an on-line monitoring method of overall three-dimensional deformation of wind wheel blades in working states. The on-line monitoring method comprises the steps of selecting a wheel hub center as a fixed mark point, selecting another mark point at the root of each blade, and adopts marks in different shapes before a wind generator unit operates, obtaining overall three-dimensional coordinates of the wind wheel blades in static states with two digital cameras, when the wind generator unit operates, determining rigid body rotation angles of the wind wheel blades according to relative positions of the mark points in the working states and the static states, calculating to obtain the three-dimensional coordinates of the deformed wind wheel blades in the working states according to image plane coordinates after removing rigid body rotation displacement, and obtaining overall three-dimensional displacement values and strain values of the wind wheel blades in the working states according to differences of the three-dimensional coordinates before and after the deformation of the wind wheel blades. The method has the on-line, non-contact, overall and three-dimensional advantages and the like, can obtain overall three-dimensional displacement and strain of the wind wheel blades in the working states, and achieves monitoring of the deformation of the wind wheel blades in the working states.

Description

technical field [0001] The invention belongs to the field of full-field three-dimensional deformation measurement of structures, and in particular relates to an online monitoring method for full-field three-dimensional deformation of wind turbine blades in a working state. Background technique [0002] As the world's energy crisis becomes more and more serious, and the public's demand for improving the ecological environment is increasing, wind energy, as a clean and renewable energy source, is increasingly valued by governments. The wind power industry is gradually developing into a new industry that has begun to take shape. Due to strong wind, electric shock, corrosion and other factors, wind turbines may be damaged or even catastrophic during operation. Wind turbine blades are one of the key components of wind turbines. The quality of the blades directly affects the efficiency, life and performance of wind turbines. Therefore, the safety of wind turbine blades is extreme...

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
IPC IPC(8): G01B11/16
Inventor 周华飞豆红尧秦良忠谢子令
Owner WENZHOU UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap