Method of detecting wrinkles in a fiber reinforced laminated structure and auxiliary device for performing thermal scans

A laminated structure and fiber-reinforced technology, applied in the field of detecting wrinkles in fiber-reinforced laminated structures, can solve problems such as wrinkles

Inactive Publication Date: 2012-08-29
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Uneven structures beneath the laminate or undulations in the surface on which the laminate is built can also cause wrinkles

Method used

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  • Method of detecting wrinkles in a fiber reinforced laminated structure and auxiliary device for performing thermal scans
  • Method of detecting wrinkles in a fiber reinforced laminated structure and auxiliary device for performing thermal scans
  • Method of detecting wrinkles in a fiber reinforced laminated structure and auxiliary device for performing thermal scans

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Embodiment Construction

[0029] In the following, reference will be made to Figures 1 to 3 The method of the present invention is described with reference to Figures 4 to 6 Auxiliary equipment for performing the method is described.

[0030] figure 1 A wind turbine rotor blade 1 made of a fiber reinforced laminate structure is shown. This rotor blade will be inspected for the presence of wrinkles in the laminate. Let us assume that the fold 3 is present in the region of the rotor blade 1 with its shoulder 5 .

[0031] To detect possible wrinkling, at least those areas of the rotor blade stack that are known to be prone to wrinkling are inspected. Since the folds usually have a longitudinal extension, such as image 3 As shown, it is sufficient to inspect the rotor blade along a single path that intersects the wrinkle. However, in order not to miss a wrinkle, the blade needs to be inspected along two or more paths that are close enough to each other to ensure that no wrinkle is missed. figure ...

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PUM

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Abstract

A method of detecting wrinkles (3) in a fiber reinforced laminated structure (1) is provided. In this method, - the structure (1) is locally heated or cooled, the location of the heating or cooling being moved along a defined path (7), - the temperature of the structure (1) is measured at a measuring location being different from the location of the heating or cooling, the measuring location being moved along the same path (7) as the location of the heating or cooling, and - wrinkles (3) are detected from temperature anomalies found along the defined path (7).

Description

technical field [0001] The present invention relates to a method of detecting wrinkles in a fibre-reinforced laminate structure, wherein said wrinkles are detected on the basis of temperature anomalies found in the structure. Furthermore, the invention relates to auxiliary equipment for thermal scanning of fiber-reinforced laminated structures. Background technique [0002] The structural properties of fiber reinforced laminate structures are generally influenced by the amount, type and orientation of the reinforcing fibers. Typically, fiber stiffness and strength are only considered when loading occurs in the longitudinal fiber direction. Thus, conventional designs assume that the fibers of the finished laminate will be oriented in the same direction as the fibers were placed in the mold. However, in some cases, the manufacturing process can cause wrinkles in the fibrous layers. In this case, the crumpled fibers no longer have the desired orientation and can lead to over...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20
CPCG01N25/72
Inventor P.尼尔森
Owner SIEMENS AG
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