Zhai Changyuan, Zhao Chunjiang, Wang Xiu, Wang Ning, Zou Wei, Li Wei
College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China.
National Engineering Research Centre for Information Technology in Agriculture, Beijing 100097, China.
Sensors (Basel). 2015 Oct 16;15(10):26353-67. doi: 10.3390/s151026353.
Spray deposition and distribution are affected by many factors, one of which is nozzle flow distribution. A two-dimensional automatic measurement system, which consisted of a conveying unit, a system control unit, an ultrasonic sensor, and a deposition collecting dish, was designed and developed. The system could precisely move an ultrasonic sensor above a pesticide deposition collecting dish to measure the nozzle flow distribution. A sensor sleeve with a PVC tube was designed for the ultrasonic sensor to limit its beam angle in order to measure the liquid level in the small troughs. System performance tests were conducted to verify the designed functions and measurement accuracy. A commercial spray nozzle was also used to measure its flow distribution. The test results showed that the relative error on volume measurement was less than 7.27% when the liquid volume was 2 mL in trough, while the error was less than 4.52% when the liquid volume was 4 mL or more. The developed system was also used to evaluate the flow distribution of a commercial nozzle. It was able to provide the shape and the spraying width of the flow distribution accurately.
喷雾沉积和分布受多种因素影响，其中之一是喷嘴流量分布。设计并开发了一种二维自动测量系统，该系统由输送单元、系统控制单元、超声波传感器和沉积收集盘组成。该系统可将超声波传感器精确地移动到农药沉积收集盘上方，以测量喷嘴流量分布。为超声波传感器设计了一个带有PVC管的传感器套筒，以限制其波束角，从而测量小槽中的液位。进行了系统性能测试，以验证所设计的功能和测量精度。还使用了一个商用喷嘴来测量其流量分布。测试结果表明，当槽内液体体积为2 mL时，体积测量的相对误差小于7.27%，而当液体体积为4 mL或更多时，误差小于4.52%。所开发的系统还用于评估商用喷嘴的流量分布。它能够准确地提供流量分布的形状和喷雾宽度。
