紧凑型彩虹折射仪的开发与实验测试

Development and Experimental Test of Compact Rainbow Refractometer

设计了一种基于全场彩虹测量技术的紧凑型彩虹折射仪。该折射仪采用笼式结构和全密封设计,光路的整体尺寸明显小于传统的彩虹光路,折射仪的尺寸为0.42m×0.42m×0.15m。使用该彩虹折射仪对单组分液滴折射率、双组分液滴浓度进行了一系列实验测试。采用去离子水喷雾测试了折射仪的折射率测量精度,测量误差约为2×10-4。测量了体积分数为0~100%的乙醇液滴的折射率,与文献数据进行了对比,并分析了误差来源。结果表明,所研发的紧凑式折射仪具有测量液滴折射率的功能,以及体积小、精度高的优点,适用于工业生产环境,在喷雾场测量中具有很好的应用前景。

In this study, a compact rainbow refractometer is developed based on the global rainbow technology. This refractometer adopts a cage structure and a completely sealed design. The overall size of the refractometer, exhibiting a length, width, and height of 0.42, 0.42, and 0.15 m, respectively, is obviously smaller than those of the traditional refractometers. Further, the performance of the rainbow refractometer is validated by the experimental measurement of the refractive index of a single-component droplet, the concentration of a two-component droplet, and the droplet temperature. The accuracy of the refractive index measured using the rainbow refractometer is verified using a deionized water spray, and the measurement error is observed to be approximately 2×10-4. The refractive indices of the water-ethanol droplets with volume fractions from 0 to 100% are measured and compared with the values in the literature, and the error sources are analyzed. The results denote that the developed compact refractometer exhibits a unique function of measuring the refractive indices of droplets;additionally, the compact refractometer possesses the advantages of small volume and high accuracy. Furthermore, it is applicable to industrial environments and exhibits a good application prospect in the measurement of spray fields.