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DAS-based wind driven generator blade structure state monitoring method

A technology for wind turbines and structural states, applied in the monitoring of wind turbines, wind turbines, and wind turbines consistent with the wind direction, etc. It can solve problems such as failure to warn of damage, delay maintenance time, and affect power generation efficiency to achieve enhanced strength Effect

Active Publication Date: 2021-01-22
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the particularity of blade shape, installation location, and working method, traditional manual inspection and ultrasonic testing methods cannot detect damage to blades in a timely and accurate manner, nor can they provide early warning of damage. Increased power generation efficiency and delayed maintenance time

Method used

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  • DAS-based wind driven generator blade structure state monitoring method
  • DAS-based wind driven generator blade structure state monitoring method
  • DAS-based wind driven generator blade structure state monitoring method

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Embodiment Construction

[0031] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0032] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiment...

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Abstract

The invention discloses a DAS-based wind driven generator blade structure state monitoring method. The method comprises the following steps of taking a blade outer side plate at one side of a wind driven generator as an optical fiber laying starting end, and laying a sensor fiber according to a laying sequence of sequentially passing through the blade outer side plate, a middle support plate, themiddle support plate and the blade outer side plate in an S-shaped circuitous manner; forming a fiber loop at the joint of a light inlet and a light outlet of the sensor fiber and an optical fiber, coating an optical fiber laying area of a blade with epoxy resin glue, pasting a layer of glass reinforced plastic adhesive tape to the area coated with the epoxy resin glue, and installing a DAS demodulation host on the inner cylindrical surface, close to a sealing door, of a blade body of the blade; and connecting the sensor fiber through a hole in the sealing door of the paddle, and when the paddle structure is damaged or is about to be damaged, enabling the sensor fiber arranged at the paddle to transmit a sensing signal carrying vibration information at an abnormal position to the DAS demodulation host, and enabling the DAS demodulation host to monitor the abnormal position of the paddle.

Description

technical field [0001] The invention relates to the technical field of distributed optical fiber sensing, in particular to a DAS-based method for monitoring the state of the blade structure of a wind power generator. Background technique [0002] A wind turbine is a power device that converts wind energy into mechanical energy and mechanical energy into electrical energy, and undertakes the heavy responsibility of wind power generation. Since wind turbines rely on renewable wind energy to generate electricity, they are clean and environmentally friendly. In addition, its infrastructure construction time is short, it can be constructed on land and at sea, and its installed capacity is flexible and its operating cost is low. Therefore, the construction of wind turbines has been strongly supported by the state. [0003] However, wind turbines are often located in climate-changing and complex environments, and the wind turbines vibrate due to unstable wind conditions. During ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D17/00F03D1/06
CPCF03D17/00F03D1/0675Y02E10/72
Inventor 张益昕梁蕾熊菲张旭苹丁哲文邹宁睦王峰
Owner NANJING UNIV
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