【摘要】 介绍具有气调功能的食品干燥设备QTM,研制一种基于上、下位机的串行智能测控系统.采用89C51,实现温度、湿度、气体成分和物料重量的多路环境参数的检测与智能控制,PC机实现在线参数的可视化显示、处理及建立专家知识库等功能.通过串口方式解决单片机口线紧张问题.模糊控制加模糊自整定PID控制,实现复杂环境温度、湿度、气体成分的有效控制,其中温度具有制冷、制热调节功能.更多还原

【Abstract】 A food drying equipment QTM with the function of air conditioning is introduced and a serial intelligent system of measurement and control based on superordinate computer and subordinate computer is studied.The 89C51 is adopted to realize the detection and intelligent control of multi-channel ambient parameters including temperature,humidity,air composition and the material weight;a PC is adopted to realize visual display and proeessing on line parameters and establishment of expert knowledge base.Moreover,the limited number of I/O port inside single chip microcontroller is relieved by serial communication;and the effective control of complicated ambient temperature,humidity and air composition is realized by fuzzy control in combination with fuzzy self adaptive PID control,in which the temperature has the adjustable function of cooling or heating.更多还原