毕业设计（论文）-基于AT89S52单片机的智能风扇调速系统设计.doc

湖南理工大学
电子与信息工程学院
本科毕业论文


论文题目基于AT89S52单片机的智能风扇
调速系统设计
学生姓名
学号 073514011
专业电气自动化
班级 07电气
指导教师
2011年5月
摘要
本设计是以AT89C52单片机为核心的智能电风扇控制系统,结合DS18B20温度传感器、电源电路、复位电路、指示电路、键盘电路、功率继电器等技术,利用单片机检测DS18B20温度传感器采集的环境温度,根据环境温度变化来自动控制单片机的P1脚输出高电乎或者低电平,来控制继电器线圈中能否有电流经过,根据继电器线圈通电时,常开触点闭合,没电流经过时,常开触点保持断开,从而实现自动控制电风扇的转速以及起停,该系统改变了传统的手动控制电风扇的起停,实现了多档温控电风扇全自动调速控制,较好地把智能控制技术应用到了家用电器控制系统中,用人体周围的环境温度对风扇进行温控。
实践证明该调速器可靠性高、控制准确、节能节电、成本低,弱电控制强电;利用软件技术实现电风扇风速调级和开停机控制,增强了抗干扰性。该设计具有较高的应用价值,适用于依靠电风扇散热来降温的任一控制系统中。
关键词:AT89C52;温度检测;电风扇;自动调速
ABSTRACT
This design makes MCU AT89C52 the core of the intelligent electric fan control system, which bined with DS18B20 sensors, the power circuit, reset circuit, indicating circuit, keyboard, the coil power relay and other technologies,The temperature collected by DS18B20 is detected by single puter,according to high and low temperature,single puter P1 pin output high level or low level to control relay whether there is current in the coil through,according to the coil power relay normally open contact is closed,no current passing,often a disconnect to maintain contacts so as to achieve a number of gears of automatic temperature controlled fan speed controlling and the automatic control from the fan`s uses surrounding temperature to regulate the speed of an electric fan.
The system has changed the traditional manual control from the fan`s stopped,In which intelligent control technology is applied to home appliances control prove that the controlling of this electric fan governor is high reliability-stabilit,accurate and energy-saving,low cost,a strong weak control;Kind of software technology is used to achieve transfer-level fan speed controlling and open parking controlling,which enhances the anti- design has higher value ,could be applied in any control system in which electric fan is used to lower the temperature.
Key words: AT89C52; Temperature collection; Electric fan; Automatic speed regu