粮库多点温度巡回检测的PIC单片机控制系统设计

In this article ,a kind of detecting and control system for distributed & itiner temperatures on the basis of the AD590 sensor and the PIC16c74 Microcontroler is introduced.It’s easily to detect the itiner temperatures and the enviroment temperature automatically or selectivly regularly.The time between two detection can be changed convinently.It is adjustable to expand the detection points , display the temperatures,compare check point temperature and environment temperature automatically, and alarm for high temperature.This system has strong anti-interference ability .Because its low power consumption,it can work for a long time .On the hardware, by making good use of the internal resources of the PIC16c74 Microcontroller (for instance: A/D transistor, Watch Dog Circuit ), the hardware design of system become relatively simple and easy to realize. The circuit also include LED and light emitting diode display circuit, relay protection circuit and alarm circuit.On the software,by programming for CPU realized monitoring the temperature on every road and center management. In addition, with 16 butons, can control the system easily. The anti-interference on the hardware and software is designed．