基于单片机的施药监测系统设计与试验

Design and Experiment of Pesticide Application Monitoring System Based on MCU

基于STC12C5A60S2单片机,采用串口通信技术、数据库技术、VS2008软件编程技术,设计并实现了施药监测系统。该系统具有可扩展性,可支持8路模拟传感器和2路数字脉冲式传感器,以采集压力、流量和速度等各种施药参量,并通过LCD显示器实时显示;系统可将各施药参量存入SD卡中,同时通过RS232串口传给PC机;PC机将接收到的数据存储于数据库中,并以表格和图形方式向用户显示施药参量。试验表明:采样周期为1 s时,速度经一次校核后测量平均精度达97.7%;测试平台试验和喷药机试验的压力测量平均精度分别为99.3%和98.7%,流量平均测量精度达99.3%。

A pesticide application monitoring system was designed by using serial communication technology,database technology and VS2008 software programming technology based on MCU STC12C5A60S2.The system could collect information from eight analog sensors and two pulse sensors at the same time.The pesticide application parameter data from sensors（pressure sensor,flow sensor,speed sensor,etc.） would be displayed on LCD monitor,stored in SD card and transmitted to PC through RS232 serial port.Then the data will be stored into database and showed to users in the term of tables and graphs on PC as well.Experiments showed that while the sampling period was 1s,the average measuring accuracy of speed was 97.7% after the system calibration,the average measuring accuracy of pressure in ＂test-bed experiment＂ and ＂sprayer experiment＂ was 99.3% and 98.7%,and the average measuring accuracy of flow was 99.3%.