Research And Development Degree Nozzle Wear Electronic Evaluation System

Pesticide spraying technology is an integrated technology. Pesticide spraying technique depends not only on the level of development of pesticides and pharmaceutical products, but also on the level of spraying machinery. But the uniformity of pesticide depends on the spraying nozzle performance, research nozzle performance is the premise of improving the level of agricultural plant protection. High and low degree of wear of nozzle affects the efficiency of the use of pesticides.There is more research on the uniformity of sprinklers at home and abroad, but less research on the wear and consistency of the nozzle, which stands for the performance of the nozzle. Generally, the flow of nozzle and the consistency are measured by man, resulting in the detection accuracy and efficiency is low. The study for wear of nozzle is insufficient, so this paper developed a nozzle wear electronic evaluation test system. This system based on FPGA controller chips, has processed the flow sensors, pressure sensors, temperature and humidity sensors, meteorological sensor data, and then storage and display. This system realizes the function of real-time display, which including amount of1-30nozzle wear, spray nozzle flow, spray pressure, weather conditions and other data, the device has multiple processing tasks, easy operation, and high reliability.The main content includes: 1、Analyzed current domestic and overseas development status and main research methods of nozzle wear, discussed the importance and significance of spray uniformity then.2、Designed nozzle wear proposal and the overall functionality and performance of each module of the electronic evaluation system;3、Designed the hardware parts. This system includes the following modules:Frequency conversion module circuit design, signal conditioning circuits, A/D conversion module circuit. FPGA microprocessor as the core of the control system completed signal acquisition, data processing, storage and display.4、Developed a language interface based C#, transferring data to the FPGA in real-time and better complete human-computer interaction. SOPC system achieved the module of A/D data acquisition and LCD display.5、Elaborated all the orthogonal test, analyzed the influence of the nozzle type, spray pressure and spray time on the distribution of nozzle wear degree, nozzle flow and nozzle consistency.