Microsoft Word - 27.doc 关键词： AT89C52； 变量喷雾； GPS； [gap=499]Keywords: AT89C52; Variable rata sprayer; GPS;
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变量喷雾装备 VRSE
①A switching-mode solenoid valve was actuated by a square electrical signal with tunable duty cycle and tunable frequency within 20 Hz. The intermittent variable spray flow based on PWM was achieved.
①用频率在20Hz以内可调、占空比可调的方波电信号驱动开关式电磁阀,实现了基于脉宽调制(PWM)技术的间歇式变量喷雾。
参考来源 - 喷雾图像处理及脉宽调制（PWM）变量喷雾的雾化特性研究The delay time of variable-rate spraying increased from 0.3s to 1.5s while increasing amplitude of decreasing spray flow-rate;but it was not the same situation while increasing amplitude of increasing spray flow-rate.
4)研究了变量喷雾系统喷雾流量瞬态特性(1)将调小喷雾流量的调节幅度增大时,变量喷雾延迟时间会相应增加,从0.3s上增大至1.5s;将调大喷雾流量的调节幅度增大时并不符合上述规律。
参考来源 - 变量喷雾系统设计及喷雾流量控制特性试验研究A model that matches the Inter-hole variable spray control system was built. A machine vision-based inter-hole variable spray control system test platform has been build.
确定了穴间变量喷雾控制系统的匹配模型,构建了基于机器视觉的穴间变量喷雾控制系统试验平台。
参考来源 - 基于机器视觉的变量喷雾控制系统研究There was the response time for the spraying system and need to be obtained through variable-rate spraying experiments.
由于喷雾系统本身具有系统的响应时间T,因此响应时间T需要在变量喷雾试验中进行确定。
参考来源 - 喷雾机器人超声定位及变量喷雾试验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
并研究了此种变量喷雾装置的喷雾特性。
The effects of this variable-rate spray equipment on spray characteristics were studied.
本文研究分析了农业变量喷雾系统的作业精度及其影响因素。
The thesis takes the research of the working accuracy and the influencing factors of variable rate sprayer system used in agriculture.
文章主要研究了AT 89 C 52单片机实现变量喷雾的工作原理和实现方案，重点阐述了该系统的硬件设计和软件编程。
This paper researches on theory and scheme of variable rata sprayer controller based on AT89C52, the design of hardware and software are given emphasis to explain.
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