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基于热成像的气体泄漏检测技术以其检测效率高、直观可视等优点,已成为石油天然气泄漏检测的重要手段,但常规的气体泄漏热成像检测方法需要检测人员从视频图像中主观地判断泄漏气体痕迹,容易发生漏检、误检。研究了一种基于尺度不变特征变换(SIFT)和支持向量机(SVM)的泄漏气体云团热成像检测算法,采用帧间差分法从红外图像序列中筛选目标区域;分别提取泄漏气体和干扰物的SIFT特征;使用SVM对候选区域进行目标判别,提取泄漏气体云团目标。针对真实复杂场景中包含乙烯、甲烷等的气体泄漏图像和运动人员、漂动树木、野草等干扰图像,建立了1000个典型目标图像数据库,通过图像检测仿真,可得所提算法对距10~150 m处的泄漏气体云团的分类准确率可达92.5%。结果表明,采用该检测方法可自动排除其他运动物体的干扰,有效检测出泄漏气体云团。 相似文献
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Amine-containing film deposited in pulsed dielectric barrier discharge at a high pressure and its cell adsorption behaviours 下载免费PDF全文
With monomer allylamine, amine-containing functional films were
prepared in alternative current pulsed dielectric barrier discharge
(DBD) at a high pressure. This paper analyses in detail the film
properties and structures, such as hydrophilicity, compounds and
microstructures as well as amine density by the water contact angle,
Fourier transform infrared spectroscopy, atomic force microscopy,
and ultraviolet--visible measurement. The influence of discharge
parameters, in particular applied power, on amine density was
investigated. As an application the cell adsorption behaviours on
plasma polymerization films was performed in-vitro. The
results show that at a high pressure pulsed DBD plasma can
polymerize films with sufficient amine group on surface, through
which the very efficient cell adsorption behaviours was
demonstrated, and the high rate of cell proliferation was
visualized. 相似文献
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