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Three-dimensional deformation measuring method of non-contact wind power blade whole field

A technology for wind turbine blades and measurement methods, which is applied to measuring devices, instruments, and optical devices, and can solve problems such as sensor damage and failure, limited range, and strains in only one direction.

Inactive Publication Date: 2013-09-11
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

The research on the damage mechanism and damage identification of wind turbine blades often needs to measure the deformation field of the surface of wind turbine blades under the action of wind load. Difficulties and deficiencies such as damage and failure due to damage to wind turbine blades

Method used

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  • Three-dimensional deformation measuring method of non-contact wind power blade whole field
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  • Three-dimensional deformation measuring method of non-contact wind power blade whole field

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Embodiment Construction

[0020] The invention provides a method for measuring non-contact three-dimensional deformation of wind power blades in the whole field, comprising the following steps:

[0021] (1) Spray black and white matt paint on the surface of the wind power blade to be tested to form random speckles;

[0022] (2) According to the field of view of the industrial digital camera and the size of the wind power blade to be measured, the entire surface of the wind power blade is partitioned, and there is a partial overlap between each partition, and then the deformation measurement sequence of each partition is determined; The basis is to partition according to the field of view of the industrial digital camera and the size of the wind power blade to be measured, and the measurement sequence is to measure sequentially along the length direction of the wind power blade.

[0023] (3) Starting from the first partition to be measured, two industrial digital cameras are set up at a non-parallel pos...

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Abstract

The invention provides a three-dimensional deformation measuring method of a non-contact wind power blade whole field. The three-dimensional deformation measuring method of the non-contact wind power blade whole field comprises spraying black and white lusterless paint on the surface of a wind power blade to be measured to form into random scattering spots; performing partition on the whole surface of the wind power blade, calculating three dimensional coordinates of every point of the wind power blade before deformation and calculating three dimensional coordinates of the whole wind power blade under an overall coordination system; and calculating three dimensional displacement of the wind power blade whole field according to differential values of the wind power blade before and after the deformation to obtain a strain value of the wind power blade whole field further. The three-dimensional deformation measuring method of the non-contact wind power blade whole field has the advantages of being whole-field, non-contact and three-dimensional, being capable of obtaining the three dimensional displacement and the strain of the wind power plant whole filed, solving the difficulties and overcoming the disadvantages of contact measuring method and providing technical support for research of wind power blade damage mechanism.

Description

technical field [0001] The invention belongs to the field of structural displacement camera measurement, and in particular relates to a non-contact full-field three-dimensional deformation measurement method of wind power blades. Background technique [0002] In recent years, driven by factors such as abundant wind resources, increasing attention to environmental issues, sustained high international oil prices, and increasingly mature wind power technology, the global wind power industry has achieved extraordinary development. Due to strong wind, electric shock, corrosion and other factors, wind turbines may be damaged or even catastrophic during operation. In wind turbines, wind turbine blades are the most critical, expensive, and vulnerable components. The structural stiffness and strength of wind turbine blades are crucial to the overall structural bearing capacity and reliability of wind turbines. Therefore, the safety of wind turbine blades is extremely important. sex....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/16
Inventor 周华飞秦良忠谢子令
Owner WENZHOU UNIVERSITY
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