Design of Water Heating and Temperature Control System Based on STC89C52

摘要

An intelligent system for water temperature control is designed in this paper based on STC89C52 single-chip microcomputer, in which temperature sensor DS18B20 is used to collect temperature data. This system adopts successive approximant algorithm and incremental PID control algorithm to change PWM pulse outputted by single-chip microcomputer and thus can realize heating and cooling function within a range between 30°C and 100°C as well as automatic control on constant temperature randomly set in the whole process. Result of experiments and tests indicated that this system can function stably, which can realize satisfactory control result and meet design requirements.