顺流式玉米烘干塔温度控制系统开发与改进

为有效保证粮食的烘干温度保持在设定的安全温度范围之内,采用多传感器均匀布点检测与模糊控制技术,设计一种顺流式玉米烘干塔温度控制系统。以AT89C51单片机为开发平台,利用可编程温度传感器DS18B20,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,采用抗饱和PID控制算法,调节单片机输出占空比的大小,从而使驱动电路控制热风机的转速。与传统装置相比,改进后的温度控制系统具有主机接口简单、结构灵活、调试方便、测温系统转换速度快、精度高的特点。

The exploring and improvement of the temperature control system in the corn drying tower

To effectively guarantee the grain drying temperature to keep in safe range, a downstream type corn drying tower temperature control system was designed combining the multi-sensor detection and the even putting fuzzy control technology. With AT89C51 as the development platform, and the programmable temperature sensor DS18B20 was used via a serial port communication and transport to the LabVIEW system. Moreover, according to the upper machine, the temperature was detected as the data for feedback system adjustment, and anti-saturation PID control algorithm, the size of single chip microcomputer output duty cycle was adjusted. Thus the drive circuit heat fan speed was controlled finally. Compared with the traditional device, this improved temperature control system contained a simple host interface, a flexible structure, a convenient debugging, an efficient and precious temperature detection and transformation.