红外线自动水龙头设计论文.doc

? 毕业设计论文 2011级毕业设计任务书 一、、要求 ）摘要Abstract Water is indispensable, save water is a virtue. What we see is basically ordinary faucet, but often we can also found that, when we because urgent and forgot to turn off the faucet can make water has been flowing, thus wasting a lot of water. Water is the source of our lives, no matter in drought or water meters of the township. So this design can not waste water, convenient for us, but also the easily forget shut water use. This paper designed a kind of infrared control faucet. This circuit is simple in design, both in appearance, such advantages as high maneuverability, the traditional faucet easy to waste water, violated the modern society is seeking green low carbon goal, in this basis, automatic water supply circuit design, not only can save water, but also reduced the natural, social, company wealth. Infrared type automatic control faucet consists of infrared emission circuit, infrared receiving amplifier circuit, control circuit, solenoid valve, power component. When people or things close, automatically generate control signal relay action, make the electromagnetic valve fits the absorption of water to electricity function. It convenient installation, high sensitivity, anti-jamming ability, long service life. Emit light uniform stability, has become necessary in Peoples Daily life necessities, which are widely used in household, station, factories, schools, restaurants and other places. And greatly expanded the original function of the faucet. Therefore, the infrared automatic faucet and expand its application, has a very realistic significance. Key Words: sensor, infrared, control 目 录 第一章绪论 1 1.1引言 1 1.2市场分析 1 第二章方案论证与设计 3 2.1选用方案 3 2.2设计方框图 3 第三章硬件电路设计 4 3.1电源 4 3.1.1电源功能 4 3.1.2电源的组成 4 3.1.3电源变压器 4 3.1.4整流滤波电路 4 3.1.5 稳压电路 4 3.1.6 稳压电源技术指标 5 3.1.7稳压电源原理图 6 3.1.8电路分析 6 3.2红外传感器 6 3.2.1红外传感器工作原理 6 3.2.2红外传感器的类型 7 3.2.3使用及注意事项 7 3.3 555延时电路 8 3.2.1 555电路的工作原理 8 3.2.2 构成单稳态触发器 9 3.3 继电器 10 3.3.1 电磁继电器的工作原理 10