Abstract
Along with the single chip microcomputer technology rapid development, the microcontroller obtained the widespread application in each domain. The grain is the human survival essential item，the temperature is the precondition of preserving the grain well, storing up the massive grain plays a crucial role in the development of the stable national economy. Provision room is generally big, so there will be a lot of measurement points. Grain temperature measurement method and the corresponding intelligent control of food preservation has been an important issue.
The system is based on AT89C51 single-chip and numerical temperature sensor DS18B20, which composite the core temperature control system. This system has gathered each temperature using AT89C51 monolithic integrated circuit, which realizes functions temperature display and alarm functions and so on. It takes AT89C51 monolithic integrated circuit as main control chip, which uses digit temperature sensor DS18B20 to realize the multi-channel temperature detections. Temperature value which determines is displayed using the LCD1602 liquid-crystal in direct-viewing demonstration. This article focuses on system's software and hardware design emphatically on the foundation of determining the design of the program. It describes the system circuit design, the hardware design diagram as well as the function and the characteristic of the chip which is used in the system. This system is simulated through the PROTEUS and KEIL C software.
