Escuela Politécnica Superior, University of Zaragoza, 22071 Huesca, Spain.
Departamento de Ingeniería Agroalimentaria y Biotecnología, Universitat Politecnica de Catalunya, 08860 Castelldefels, Spain.
Sensors (Basel). 2018 Nov 1;18(11):3715. doi: 10.3390/s18113715.
An acoustic Doppler velocimeter (ADV) was used to analyse the impact of an agricultural sprayer's agitation system settings on fluid velocities inside the tank. A 3000 L capacity sprayer equipped with a 4-nozzle hydraulic agitation system was used. ADV measurements were carried at 32 points inside the tank under the following settings: circuit pressures of 8, 10, or 12 bar; water level in the tank of 1000, 2000, or 3000 L; 2 or 4 active nozzles. An agitation test with a concentration of 0.4% copper oxychloride was employed to analyse the concentration of active matter as a function of tank fill level and number of active nozzles. All parameters significantly affected the fluid velocity, which increased with increasing pressure, but decreased with increasing water level in the tank and an increased number of active nozzles. Concentration tests showed greater active matter concentrations when higher velocities were recorded by the ADV. The ADV was shown to be a useful tool for the rapid assessment of fluid velocities; in the future, it could be used to validate the design of agitation systems, and to estimate their capacity to ensure an adequate level of active matter concentration in the fluid.
采用声学多普勒流速仪（ADV）分析了农业喷雾器搅拌系统设置对罐内流体速度的影响。使用了一个配备 4 个喷嘴液压搅拌系统的 3000 升容量喷雾器。在以下设置下，在罐内的 32 个点进行了 ADV 测量：回路压力为 8、10 或 12 巴；罐内水位为 1000、2000 或 3000 升；2 个或 4 个活动喷嘴。采用 0.4%的氧氯化铜浓度进行了搅拌测试，以分析作为罐填充水平和活动喷嘴数量函数的活性物质浓度。所有参数都显著影响了流体速度，随着压力的增加而增加，但随着罐内水位的增加和活动喷嘴数量的增加而降低。浓度测试显示，当 ADV 记录到更高的流速时，活性物质的浓度更高。ADV 被证明是快速评估流体速度的有用工具；将来，它可用于验证搅拌系统的设计，并估计其容量，以确保流体中活性物质的浓度达到足够水平。
