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This paper is devoted to eliminating the noise from the measuring of directional thermal radiation for ground objects. Specifically, we think that the noise is mainly due to the variance of components in the field of view of the sensor with the view angle changing and to the heat balance change on the ground during the period of measurement. The authors present two new observation methods named as "constant area method by thermal camera" and "concurrent method by dual sensors" respectively. The experiments show that the data obtained by these methods abide by some regularly directional distribution, which is totally different from the data from the former methods. The analysis of the major factors in the directionality of thermal radiation is also made in the paper. 相似文献
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抗磨自修复纳米润滑添加剂 总被引:3,自引:0,他引:3
纳米润滑添加剂可以降低摩擦系数,对磨损表面具有一定的修复功能。依据自修复原理结合纳米粒子的制备方法和特性,探讨了运用纳米润滑剂实现机械零件自修复的理论和途径,概述了纳米粒子作为自修复润滑添加剂的研究现状。 相似文献