Based On SCM Timing Temperature Control System Design And Research

Temperature control technology in the continuous development, the traditional temperature measurement will spend a lot of manpower and material, to change very fast's temperature cannot do synchronization and timely measurement. And can produce various types of errors. Finally, the data measured in applications will lose its significance. But, single-chip microcomputer is different; it has powerful functions, small size, high reliability, cheap, short development cycle. Therefore become automation field and other measurement field are widely use's devices, in the course of industrial production indispensable component.This paper mainly studies to Vegetable cellar for applied objects, Based on SCM timing temperature control system based on the hardware design and software design. The whole thesis introduces to AT89C51 as the core equipment, Match with DS12B80 sensor, DS12887 clock chip, BC7281A keyboard display chip, solid-state relay (SSR), Heater as the system hardware. Briefly explain about these devices, through the assembler language structured programming, And by using SCM P3.1 tube feet connected to solid state relays, Using PID control algorithm for temperature control part of the software design. This is a complete timing control system design. System using clock chip provides a time base, and by using DS18B20 intervals of certain time measurement Vegetable cellar temperature. Will obtain the temperature information feedback to SCM terminal, Single-chip microcomputer relay real-time temperature LED display, Meanwhile, Get measuring temperature with pre-settable temperature's difference, through comparing, Using PID control algorithm can fully heating, Adjust heating. Or do not heat. Systems use Fin heating tube of air heat, Fin heating tube has good heat dissipation, low energy consumption, easy installationUsers only need to enter the preset temperature, update DS 12887 time, it can trigger system. From the LED display can be observed on real-time temperature, preset temperature and time. This system design is also electricity-saving design. This system required less energy, low cost, strong maintainability. This system is suitable for the vegetable cellar in.