Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

On-site damage monitoring and recognition method for wind turbine blade

A wind turbine blade and damage monitoring technology, which is applied in the testing of mechanical components, testing of machine/structural components, measuring devices, etc., can solve problems such as difficult operation and difficulty in finding small defects of blades, and achieve the reduction of the number of layout points and the realization of real-time Effects of monitoring and judgment, guarantee discovery and judgment

Active Publication Date: 2016-03-23
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
View PDF8 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Simple manual inspection is not only difficult to operate, but also difficult to find the small internal defects of the blades

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to specific embodiments.

[0034] In this embodiment, taking the current mainstream MW-class wind turbine blades as an example, the following steps are adopted to perform on-site blade monitoring:

[0035] 1) Determine where the blade structure is vulnerable to damage.

[0036] Based on the blade strength and fatigue calculation report, and the structure test report of the full-size blade, the 10 weakest structural positions were selected.

[0037] 2) Install and paste strain gauges at the determined weak positions. In view of the harsh operating environment of wind turbine blades, install the strain gauges inside the blades and connect them to the outside through cables;

[0038] 3) After hanging up the blade, install a data acquisition instrument for strain measurement at the hub of the blade. One e...

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 an on-site damage monitoring and recognition method for a wind turbine blade. Aiming at the on-site operation conditions of the wind turbine blade, the method carries out the on-line monitoring and recognition of the defects of the wind turbine blade. The objective of the invention lies in providing the on-site monitoring technology, and the method achieves the timely discovering and recognition of the cracks which are possibly caused by internal and external factors when the blade is in operation. The method is characterized in that a damage part, a peripheral local region and the mechanical properties will change to some extent before and after the damage happens when a blade structure generates cracks because of external environment factors and a structural factor, thereby enabling the proportional relation between a structural strain level of the damage part and peripheral local region and a wind load to change to some extent. Therefore, the method achieves the recognition of the damage condition of the blade through the on-line monitoring of the relation between the strain of a weak part of the blade structure and the wind load.

Description

Technical field [0001] The invention relates to the technical field of wind power generation in the mechanical industry, in particular to a method for monitoring and identifying on-site damage of wind turbine blades. Background technique [0002] The damage of wind power blades is an important aspect of wind power blade operation. In the design of wind power blades, wind power blades are generally required to have a service life of 20 years. However, in actual field operation, the operating characteristics of wind turbines under unsteady loads make them prone to damage, which seriously affects the reliability and service life of the safe operation of wind turbines. Once the blade is partially damaged, it may extend to the damage of the overall blade. If it is not handled in time, it may even affect the safety of the entire unit. On the contrary, if minor damage occurs in the part of the blade, it can be found in time and the damaged part can be treated in time, which can not on...

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): G01M13/00
CPCG01M13/00
Inventor 石可重李苏威廖猜猜徐建中
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com