摘要
利用单片机设计了电风扇的自动控制系统,分析了硬件电路与软件设计。利用单片机检测18B20采集的温度,根据温度高低,单片机的P2.7脚输出高电平或者低电平,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起停。该系统改变了传统的手动控制电风扇的起停,根据温度高低实现自动控制,方便于夏天人们晚上睡觉时使用。实践证明该系统可靠性高,工作稳定,成本低,实现了弱电控制强电,有较高的应用价值。
The electric fan control system is designed by using single chip computer, the hardware and software design are analysed. The temperature collected by 18 B20 is detected by single chip computer,according to high and low temperature, single chip computer P2.7 - 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 the automatic control from the fans stopped. The system has changed the traditional manual control from the fans stopped,automatic control is realized aecoroling to temperature to facilitate the summer when people sleep at night. Practice prove that the system has high reliability,stability and low cost,a strong,weak control and higher value are achieved.
出处
《现代电子技术》
2009年第3期108-110,共3页
Modern Electronics Technique
