Water temperature control system design based on 51series

single-chip processor

Abstract ：As the national economy and the development of the domestic industry ，people need the temperature control on a variety of household appliances and industrial equipment，Using SCM to control them is not only simple control, convenience and flexibility advantages, but also can significantly improve the temperature was charged with technical indicators, which can greatly enhance the quality and quantity of the product. At present, most of the temperature control system used by the analog temperature sensor, multi-channel analog switches, A/D converter and single-chip, such as the transmission system. Water temperature control is widely used in industry and daily life, more classification, water temperature control system to control a different approach.

This design uses a microcontroller as the core of the control of water temperature control system, to achieve the artificial setting temperature, automatic temperature control, and display real-time water temperature and other functions. The water temperature testing to integrated analog temperature sensor sensing the containers in water temperature, and weak analog voltage signal of the sensor output op amp zoom. To SCM STC89C51 it as the core, the AD590 temperature sensor to collect real-time temperature and digital display, providing a variety of operating indicator to indicate the system now in which state, the software and system hardware has been completed, Software proteus simulation, and system design validation is a reasonable. At last, according to designed circuit, the hardware system was built by utilizing bread panel and the actual debugging was done. The test showed that the artificial set temperature, automatic temperature control, real-time water temperature and other functions can be achieved.

Key words: SCM; Analog to Digital Converter; Temperature control; Digital tube; Temperature Sensor ad590