毕业论文-基于89C52单片机的太阳能热水器控制电路设计.doc

2016届毕业设计 题 目 学 院 专 业 班 级 学 号 学生姓名 指导教师 完成日期 随着经济的发展、社会的进步，人们对能源的需求量在不断的增长，全球范围内的能源危机也日益突出人们对能源要求越来越高，寻找新能源成为当前人类面临的迫切课题太阳能一种干净的可再生的新能源，越来越受到人们的青睐经济的发展和人们生活水平的提高，关键词： Abstract With the development of economy, the progress of the society, people for growth in demand for all kinds of energy, not only in China and even global energy crisis is increasingly prominent, people has higher requirement for energy, looking for new energy become the urgent task facing the current human, including solar energy as a new clean and renewable energy, more and more get the favour of people. At the same time the development of economy and people living standard rise, the use of large household appliances to a series of environment problems. So will the development of new energy and household appliances new household appliances has become the current trend of the development of home appliance industry. And the household solar energy water heater control circuit design is so formally. It USES photovoltaic (pv) grid power generation technology to provide electricity for water heater, excess electricity to the grid at the same time; And in the power system of solar power is insufficient, can compensate for the water heater power supply. This design is focused on using 89 s52 microcontroller. And USES the digital temperature sensor to test the temperature of the water. Collected digital signal directly into the single chip microcomputer 89 s52 single-chip microcomputer processing. Display the data using LCD. Another function is measuring water level of high and low. Use 0 ~ 5 v output. After A/D conversion into digital. And then into the single chip microcomputer 89 s52. The water level value is displayed on the LCD. Button is used to set the required temperature. MCU internal set temperature and the current temperature. When the temperature is below the set temperature will electromagnetic switch off. Open the heating device. Temperature i