摘   要：研究了一种应用于办公人数考勤实时监测与节能控制的系统。该系统以MCS51单片机为主控芯片，通过在办公入口处安装红外传感器模块来统计室中的实际人数，并通过液晶屏实时显示。当检测统计到室内无人时，通过驱动电路关闭室内的灯光，做到人走灯灭，有效的节约电能，延长灯具的使用寿命。

关键词：MCS51单片机；红外传感器；节能控制

Abstract: an applied to office number of real-time monitoring and energy-saving control system of check on work attendance is studied in this paper. The main control chip of the system is MCS51, the real number of attendance is counting by infrared sensor and displaying through the L