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基于脉冲红外热像技术的叶片缺陷识别
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作者 王琳琳 陈长征 +1 位作者 周勃 康爽 《可再生能源》 北大核心 2025年第3期333-338,共6页
针对风力机叶片缺陷类型识别问题,文章首先建立了缺陷热反射系数(R)物理模型,提出了基于热像信号重建技术和缺陷R相结合的方法;然后,利用长脉冲红外热像技术对含有气泡、杂质、褶皱的风力机叶片试件进行不同加热时间的试验。试验结果表... 针对风力机叶片缺陷类型识别问题,文章首先建立了缺陷热反射系数(R)物理模型,提出了基于热像信号重建技术和缺陷R相结合的方法;然后,利用长脉冲红外热像技术对含有气泡、杂质、褶皱的风力机叶片试件进行不同加热时间的试验。试验结果表明:长脉冲红外热像技术在温度冷却过程中能够识别叶片试件中的缺陷;通过热像信号重建技术处理后的热序图可以识别叶片的缺陷。试验结果和预测结果的误差很小,证明建立的叶片缺陷R物理模型是可行的。 展开更多
关键词 长脉冲红外像技术 缺陷识别 热反射系数 像信号重建技术
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Analyses on performances of heat and multilayer reflection insulators 被引量:4
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作者 LEE Moo-jin LEE Kang-guk SEO Won-duck 《Journal of Central South University》 SCIE EI CAS 2012年第6期1645-1656,共12页
This research was conducted to study the performances of the heat and multilayer reflection insulators used for buildings in South Korea to realize eco-friendly, low-energy-consumption, green construction, and to cont... This research was conducted to study the performances of the heat and multilayer reflection insulators used for buildings in South Korea to realize eco-friendly, low-energy-consumption, green construction, and to contribute to energy consumption reduction in buildings and to the nation's greenhouse gas emission reduction policy (targeting 30% reduction compared to BAUCousiness as usual) by 2020). The heat insulation performance test is about the temperatures on surfaces of test piece. The high air temperature and the low air temperature were measured to determine the overall heat transfer coefficient and thermal conductivity. The conclusions are drawn that the heat transmission coefficients for each type of existing reflection insulator are: A-1 (0.045 W/(m-K)), A-2 (0.031 W/(m.K)), A-3 (0.042 W/(m.K)), A-4 (0.078 W/(m.K)), and the average heat conductivity is 0.049 W/(m-K); The heat conductivity for each type of Styrofoam insulator are 0.030 W/(m.K) for B-l, 0.032 W/(m-K) for B-2, 0.037 W/(m'K) for B-3, 0.037 W/(m.K) for B-4, and the average heat conductivity is 0.035 W/(m'K) regardless of the thickness of the insulator; The heat conductivity values of the multilayer reflection insulators are converted based on the thickness and type C-1 (0.020 W/(m.K)), C-2 (0.018 W/(m.K)), C-3 (0.016 W/(m.K)), and C-4 (0.012 W/(m.K)); The multilayer reflection insulator keeps the indoor-side surface temperature high (during winter) or low (in summer), enhances the comfort of the building occupants, and conducts heating and moisture resistance to prevent dew condensation on the glass-outer-wall surface. 展开更多
关键词 heat reflection insulator multilayer reflection insulator overall heat transfer coefficient thermal conductivity nonflammability vapor permeability eco-friendly construction
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