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基于毛细上升法,设计了一种新型的表面张力实验系统。利用CCD成像和图像处理技术,准确快速地测量毛细管内液柱高差。采用新实验系统,对R600a在273～343K温度区间内的表面张力进行了实验研究,结果表明,实验数据与NIST数据库和已发表文献数据相比,最大偏差不超过0.2mN·m~(-1),证实了实验系统的可靠性,可以用于液体表面张力的准确测量。
Based on the capillary ascending method, a new type of surface tension experimental system was designed. Using CCD imaging and image processing technology, accurate and rapid measurement of capillary column height difference. A new experimental system was used to study the surface tension of R600a in the temperature range of 273 ~ 343K. The experimental results show that the maximum deviation of the experimental data from the NIST database and the published data does not exceed 0.2mN · m -1 ), Confirming the reliability of the experimental system, can be used for accurate measurement of liquid surface tension.