CAJ | 학술논문

目前彩虹测量技术广泛地应用于液体参数的测量，然而针对吸收性液滴彩虹测量技术的研究较少。该文基于几何光学理论、Mie理论和Bouguer定律，提出一种同时测量液滴粒径、折射率和吸收率的多参数测量方法。利用电荷藕合器件图像传感器（charge—coupleddevice，CCD）相机拍摄液滴的彩虹信号，通过彩虹信号的Ripple结构频率、主峰峰值位置和强度，实现多参数测量。为避免自由下落液滴形成长短轴比随机的椭球而带来的测量误差，以毛细管出口的稳定液柱为测量对象进行实验研究。结果表明：若Ripple结构淹没在噪声之中，则无法准确获得频率，粒径的测量会产生较大误差；在Ripple结构信噪比较高的前提下，该方法具有较小的测量误差。红墨水溶液的吸收率与其浓度成线性关系，吸收率的测量下限可以达到10^-5。
목전채홍측량기술엄범지응용우액체삼수적측량，연이침대흡수성액적채홍측량기술적연구교소。해문기우궤하광학이론、Mie이론화Bouguer정률，제출일충동시측량액적립경、절사솔화흡수솔적다삼수측량방법。이용전하우합기건도상전감기（charge—coupleddevice，CCD）상궤박섭액적적채홍신호，통과채홍신호적Ripple결구빈솔、주봉봉치위치화강도，실현다삼수측량。위피면자유하락액적형성장단축비수궤적타구이대래적측량오차，이모세관출구적은정액주위측량대상진행실험연구。결과표명：약Ripple결구엄몰재조성지중，칙무법준학획득빈솔，립경적측량회산생교대오차；재Ripple결구신조비교고적전제하，해방법구유교소적측량오차。홍묵수용액적흡수솔여기농도성선성관계，흡수솔적측량하한가이체도10^-5。
The rainbow technology is widely used for liquid parameter measurement. However there are few studies on liquid absorbance at present. A novel technique based on the geometrical optics, Mie theory and Bouguer law for measuring refractive index, radius and absorbance simultaneously was presented. A charge-coupled device（CCD） camera was used to detect the scattering intensity distribution arising from the liquid column illuminated by a laser beam. The frequency of Ripple bows, position and intensity of the maximum peak were used for multi-parameter calculation. Stable liquid column at the capillary export was chosen for experimental research to avoid the measurement error from nonsphericity of the falling droplets. The result shows that the frequency of Ripple bows couldn＇t be determined correctly when the Ripple bows are thoroughly destroyed by noise. Therefore the radius result has large error. On the contrary, accuracy result can be obtained when the signal to noise ratio of Ripple bows is high. A linear relationship between volume concentration of red ink and the absorbance is illustrated. And the lower detection limit of absorbance is as low as 10-5.