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摘要
A system based on solution conductivity theory was developed to quickly measure the accumulating droplet mass of spray replications. The developed system consists of hardware and software. The hardware consists of a droplet collecting device, a solution conductivity meter, and a PC for data analysis. The software consists of data communication, processing, display, and storage modules. To provide a basis for the developed system, the relationship between the accumulating droplet mass and the solution conductivity was studied. The test results showed good correlation between the accumulating droplet mass and the solution conductivity, with a coefficient of determination of 0.99, and the corresponding regression equation was created using SPSS 20.0. A comparison experiment among the developed system, a droplet capture device, and paper cards was also conducted. The comparison test revealed that the relative error between the developed system and paper cards was less than 7.75%, and the droplet collection and recovery rates for the developed system were 84% and 91%, respectively, which indicated that the system had good precision. Next, the influences of spray parameters (air velocity, droplet size, and measurement direction), design parameters (inclined angle of droplet intercepting plate), and environmental factors (solution evaporation) on the measurement precision of the developed system were studied. The results showed that the developed system had good stability. Application tests were conducted in the field. The results showed that the developed system could continuously measure the droplet mass, quickly display the accumulating droplet mass for each spray replication, and reduce the experiment cost. It was concluded that a quick method to measure accumulating droplet mass was introduced. This system enables measurement of a large amount of data in experimental research of air-assisted spraying and provides a new method for studying air-assisted spray regulation.
- 出版日期2017
- 单位南京农业大学
