基于DSP和单片机的实时变量喷药系统设计

Real-time Variable Spraying System Based on DSP and Single Chip Microcomputer

为防治玉米农田杂草危害,设计了一种基于DSP识别和单片机控制的杂草实时变量喷药系统。数字信号处理器(DSP)实时数据处理能力强,单片机控制能力强。DSP作为喷药系统上位机图像处理模块的CPU,对田间玉米杂草图像实时采集、处理,分离出杂草,生成杂草位置信息表,发送给作为系统下位机控制模块CPU的单片机;单片机通过电磁阀控制6个喷头的开闭实现精准变量喷药。田间试验表明:系统在室外田间复杂情况下可以满足实时精准喷药要求,在作业机械速度为4km/h时,喷药精确度可以达到91.4%。

In order to control the damage of weeds in corn farmland,the paper designed a real-time variable spraying system based on DSP and single-chip in field.The digital signal processor(DSP)has strong real-time data processing capability and strong single-chip control capability.This paper combined the advantages of DSP and single-chip microcomputer.As the CPU of the image processing module of the upper computer of the spraying system,DSP collected and processed real-time field images to separate weeds,generate the position information table of weeds,and send it to the single-chip microcomputer.The control module MCU of the system controlled the opening and closing of the six nozzles through the solenoid valve to achieve precise variable spraying.Field experiment showed that the system can meet the requirements of real-time precise spraying in complex fields.When the working machine speed is 4 km/h,the spraying accuracy can reach 91.4%.