2022
DOI: 10.1088/1361-6501/ac41a8
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Depth detection of spar cap defects in large-scale wind turbine blades based on a 3D heat conduction model using step heating infrared thermography

Abstract: The defects dispersed in spar cap often lead to failure of large-scale wind turbine blades. To predict the residual service life of blade and make repair, it is necessary to detect the depth of spar cap defects. Step-heating thermography (SHT) is a common infrared technique in this domain. However, the existing methods of SHT on defect depth detection are generally based on 1D models, which are unable to accurately detect the depth of spar cap defects because of ignoring material anisotropy and in-plane heat f… Show more

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Cited by 8 publications
(3 citation statements)
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References 32 publications
(65 reference statements)
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“…Doroshtnasir et al [23] proposed long-range detection of wind turbine blade surface defects by minimizing interference. Zhang et al [24] used the equivalent source method (ESM) to establish a three-dimensional model based on heat transfer theory to detect wind turbine blade wing beam caps. In addition to the thermal characteristics caused by deposits on the blade surface, other inhomogeneous materials can affect the thermal imaging results.…”
Section: Visual Inspectionmentioning
confidence: 99%
“…Doroshtnasir et al [23] proposed long-range detection of wind turbine blade surface defects by minimizing interference. Zhang et al [24] used the equivalent source method (ESM) to establish a three-dimensional model based on heat transfer theory to detect wind turbine blade wing beam caps. In addition to the thermal characteristics caused by deposits on the blade surface, other inhomogeneous materials can affect the thermal imaging results.…”
Section: Visual Inspectionmentioning
confidence: 99%
“…Therefore, the acoustic emission-based approaches require a large number of sensors, which increases the complexity of the monitoring system. Additionally, there are many other sensing techniques have been implemented for WTB measurements, including ultrasound [9,10], camera [11], and thermography [12,13]. In general, different sensing techniques have different advantages and disadvantages, leading to different characteristics on installation, non-destruction, and precision.…”
Section: Introductionmentioning
confidence: 99%
“…Active infrared detection technology has been recognized and extensively employed in industrial defect detection fields as a non-contact and visual non-destructive testing technology for evaluating the integrity of materials over the past few years [1,2]. The core of active infrared thermography (IRT) detection is to apply active thermal excitation to generate a temperature difference inside the specimen, thereby solving the problem of low sensitivity in passive detection.…”
Section: Introductionmentioning
confidence: 99%