Design of Lighting Control System Based on MCU
Abstract：This paper copiously studied using features, lighting requirements and
the existing problems of the university classroom, at last a kind of lighting control
system based on mcu of classroom was put forward. The system used AT89S51
microcontroller as a core component of the control module. It introduced pyroelectric
infrared sensor to detect the existence of human body, and used circuit which
constituted of photosensitive triode to detect the strength of environment lighting. The
navar according to the resonable conditions of turning on classroom light and the
identification of signal about environmental lighting and existing of human body,
achieved the intelligent control of classroom lighting . At last, it avoid the waste of
electricity. It also had alarming function, at the same time anti-interference measures
such as the software / hardware "watchdog" was adopt. The system can meet institution
requirements for classroom lighting control, largely achieved the purpose of energy
saving.
Key words: Microcontroller；Intelligent control；Pyroelectric infrared sensor；
X5045
