摘要
介绍基于微控制器继电器的硬件和软件设计。利用电压/频率转换器LM331将输入电压转换成数字量输入单片机,求得交流电压有效值,与整定值进行比较,由单片机控制继电器,实现过电压、低电压等保护功能。通过STC89C52RC等器件实现交流电压有效值的测量、数据的显示及继电器的智能化。
This paper has introduced the hardware and software design of the intellective relay based on microcontroller. The V/F convertor LM33 lconvert the voltage input into digital and put it into the SCM. The voltage＇s virtual value is got by the SCM and counter. Weather the relay acts or not is decided by the SCM. The measure of the voltage＇s virtual value, the display of the data, and the intelligentiztion of the relay are all realized by STC89C52RC in this whole design.
出处
《中国仪器仪表》
2008年第4期44-46,共3页
China Instrumentation
