出于保障通讯车辆正常使用过程中用电设备和人身安全的目的,设计并实现基于AT89C2051微处理器和LM239电压比较器的一种行之有效的通讯车电源保安板,介绍该套装置的整体架构、电路原理以及软件解决方案。实际应用表明,该保安板具有操作简便、测试准确、成本低廉的特点,达到了设计要求。 For the purpose of ensuring electrical equipment and personal safety during normal use of communication vehicles, an effective communication vehicle power supply security board based on AT89C2051 microprocessor and LM239 voltage comparator is designed and implemented to introduce the whole device Architecture, circuit theory and software solutions. The practical application shows that the security board has the characteristics of simple operation, accurate testing and low cost, and meets the design requirements.