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Method and system for monitoring deformation of wind power motor blade

A blade and wind power technology, applied in the field of deformation monitoring of wind turbine blades, can solve complex and changeable, economic loss, damage and other problems

Inactive Publication Date: 2016-08-17
NANJING INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the complex and changeable meteorological conditions of the wind field, the blades of the fan are subjected to stress and deformation for a long time, and may be damaged due to fatigue damage, resulting in huge economic losses

Method used

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  • Method and system for monitoring deformation of wind power motor blade
  • Method and system for monitoring deformation of wind power motor blade
  • Method and system for monitoring deformation of wind power motor blade

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Experimental program
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Embodiment

[0052] The embodiment measures the Rayleigh scattering of the optical fiber, that is, the change of Rayleigh scattering with the bending of the optical fiber, so as to measure the bending radius of each point of the fan blade.

[0053] The loss of the fiber depends on the linear scattering loss. The main cause of the linear scattering loss is the random change of the fiber density, and the size of the change space is small compared with the wavelength, so the scattering is almost omnidirectional. This kind of scattering is called Rayleigh scattering. Rayleigh scattering is inherent and cannot be eliminated. It determines the lower limit of fiber scattering loss, so by detecting and analyzing the back Rayleigh scattering signal in the fiber, the loss characteristics of the fiber can be obtained.

[0054] A method for monitoring the deformation of wind turbine blades, such as figure 1 ,include:

[0055] Transmit an optical pulse with a repetition period and a preferred width ...

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Abstract

The invention provides a method and system for monitoring the deformation of a wind power motor blade, and the method comprises the steps: transmitting a light pulse and injecting the light pulse into a detected optical fiber; detecting the Rayleigh backscattering light returned from a plurality of points of the detected optical fiber; solving the bending radiuses of all points of the detected optical fiber according to measured Rayleigh backscattering power, thereby obtaining the deformation of the wind power motor blade. The method and system employ a mode of measuring the change of the Rayleigh backscattering of the optical fiber with the bending of the optical fiber, thereby measuring the bending radiuses of all points of the wind power motor blade, and obtaining the deformation of the wind power motor blade. The method and system can carry out dynamic and real-time monitoring of the strain of the wind power motor blade, find the potential damage of the blade in advance, and employ a corresponding technical solution for avoiding a disastrous result before the blade is damaged actually.

Description

technical field [0001] The invention relates to a method and a system for monitoring the deformation of a wind power motor blade. Background technique [0002] Fans are the core equipment of wind power plants. Due to the complex and changeable meteorological conditions of the wind field, the blades of the fan are subjected to stress and deformation for a long time, and may be damaged due to fatigue damage, resulting in huge economic losses. Therefore, the health status of fan blades in operation is closely watched. [0003] If a suitable method can be found to monitor the strain of the fan blades in real time, it is possible to detect potential damage in the blades in advance, and take corresponding technical measures to avoid catastrophic consequences before the blades suffer actual losses. . Contents of the invention [0004] The purpose of the present invention is to provide a method and system for monitoring the deformation of wind turbine blades, which uses the lat...

Claims

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Application Information

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IPC IPC(8): G01B11/16
CPCG01B11/18
Inventor 张健王少东焦良葆曹雪虹冯月芹魏峘
Owner NANJING INST OF TECH
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