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对溶液液膜温度、厚度和浓度进行定量分析对与之相关的工业过程至关重要,对其机理的研究中它们互相耦合,而传统的测量方法只能实现液膜的温度、厚度和浓度的单独测量。本文基于比尔-朗伯定律,提出一种尿素水溶液液膜的温度、厚度和浓度同步测量新方法,通过结合3个波长1 420、1 488和1 531 nm的激光,建立了尿素水溶液液膜的温度、厚度和浓度的同步反演模型。在此基础上,利用1 mm温控样品池验证了该方法的测量精度,结果表明,该方法测量尿素水溶液液膜厚度的平均误差为0.51%,液膜温度的平均误差为2.59%,液膜浓度的平均误差为6.32%。
Quantitative analysis of liquid film temperature, thickness and concentration of solutions is of great importance to the industrial processes involved, and they are coupled to each other in their mechanism of study, whereas conventional measurement methods only allow the temperature, thickness and concentration of the liquid film Individually measured. Based on the Beer-Lambert law, a new method for simultaneous measurement of temperature, thickness and concentration of aqueous urea solution was proposed in this paper. By combining three laser wavelengths of 1 420, 1 488 and 1 531 nm, Temperature, thickness and concentration of the synchronous inversion model. On this basis, the measurement accuracy of the method was verified by a 1 mm temperature-controlled sample cell. The results showed that the average error of the method for measuring the thickness of the aqueous urea solution was 0.51% and the average error of the liquid film temperature was 2.59% The average concentration error was 6.32%.