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Method for determining wind power generation blade structure defects by supersonic wave A scanning

A technology for wind power blades and structural defects, applied in the direction of using sonic/ultrasonic/infrasonic waves to analyze solids, can solve the problem of less application research on wind power blades, and achieve safe production and operation, reduce maintenance costs, and ensure reliability. Effect

Active Publication Date: 2015-04-08
东方电气(天津)风电叶片工程有限公司
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Among them, A-scan is to process the ultrasonic signal into a waveform image, and output the waveform image with time or depth on the horizontal axis and reflected wave intensity on the vertical axis, which is suitable for industrial testing. Less applied research on blades

Method used

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  • Method for determining wind power generation blade structure defects by supersonic wave A scanning
  • Method for determining wind power generation blade structure defects by supersonic wave A scanning
  • Method for determining wind power generation blade structure defects by supersonic wave A scanning

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Experimental program
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Embodiment 1

[0027] Embodiment 1 pair has such as figure 2 The bonding area of ​​the wind power blade with the structure shown is inspected

[0028] (1) Using the same material as the bonding area of ​​wind power blades to make a number of comparison test blocks, the structures of the comparison test blocks are as follows: figure 2 , Figure 4 , Figure 6 As shown, the depth of each reflection interface marked in the figure is its design depth; the surface state, structural features, and defect types of the comparison test block are consistent with the wind power blades to be tested; wherein, figure 2 The comparison test block shown in has no structural defects, Figure 4 The upper surface of the adhesive layer of the comparative test block shown in Figure 6 The adhesive layer of the comparison test block shown in

[0029] (2) Use ultrasonic A-scan to detect the comparison test block ( figure 2), adjust the sound velocity and gain of the ultrasonic wave, so that the accuracy i...

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Abstract

The invention provides a method for determining wind power generation blade structure defects by supersonic wave A scanning. The method comprises preparing several contrast test blocks from a material the same as a material of a wind power generation blade, respectively detecting the contrast test blocks by supersonic wave A scanning to obtain a complete part oscillogram with a characteristic wave group and a defect part oscillogram, and comparing an oscillogram of a part to be detected and the complete part oscillogram or the defect part oscillogram to obtain detect information of the part to be detected of the wind power generation blade to be detected. The method provided by the invention is simple and reliable and is suitable for detection of the wind power generation blade with a resin-based glass fiber composite material structure.

Description

technical field [0001] The invention relates to a non-destructive testing method for a wind power generation blade structure, in particular to a method for judging structural defects of a wind power generation blade by using ultrasonic waves. Background technique [0002] At present, most megawatt-level wind power blades are made of resin-based glass fiber composite materials. During the molding process, affected by factors such as human factors, process stability, and environmental changes, the products are likely to have cracks, doping, bubbles, and sticking. There are defects such as lack of glue and air bubbles in the contact area, and these defects have a great impact on the overall quality and life of the blade. Especially with the development of the wind power industry, wind power blades are gradually developing in the direction of large size and high power. From the original common 1.5MW37.5m blades to the current 5MW75m blades, there are even more than 100m long bla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
Inventor 刘鲜红李鑫龙徐坤吴海亮江一杭李波
Owner 东方电气(天津)风电叶片工程有限公司
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