粒状粮食烘干塔温度控制系统设计

Temperature control system design of granular grain drying tower

设计一种顺流式粮食烘干塔的温度自动检测及控制系统,通过DS18B20温度传感器与粮食水分在线检测传感器的使用,检测系统的温度参数,通过串口通信传输至LabVIEW系统上位机显示,并以检测的温度数据作为系统调节反馈,通过抗饱和PID控制算法,调节IAP15单片机PWM输出占空比的大小,通过驱动电路控制热风机的转速,达到烘干温度恒定的目的,使得烘干的粮食达到规定的存储要求。

Design a downstream type of grain drying lower temperature automatic detection and con- trol system, through DSI8B20 temperature sensor and grain moisture detection sensor, the use of online testing system of temperature and tile grain moisture parameter, through a serial porl communicalion and transport to the LabVIEW system, according to the upper machine and to detect the temperature of the data as the feedback system, through the resislance of saturated PID control algorithm, adjustment IAPi5 microcontroller PWM duty ratio of the size of the output, through the drive circuit hot fan speed control, to achieve the purpose of drying temperature constant. To cool the temperature of the food and export, row of food grain moisture content control operations for dried food meet the storage requirements.