The Research And Design Of University Classroom Intelligent Lighting Control System

With China’s rapid economic development and social progress, the contradiction of people’s demand for energy is more and more outstanding. Lighting electricity consumption in the proportion of electricity consumption increased year by year, but the power and energy shortage problem has always existed. Higher education is a high population density areas, its teaching, scientific research and living in a body, but also become a major energy consumption. University of traditional lighting control mode caused the university campus are prevalent in "long lighting","no one lighting"etc energy waste phenomenon, due to its backward management, energy waste, poor comfort, complex wiring and lamp life short faults. In order to ease the situation of electric tension, improve the classroom lighting efficiency and maximum reduce energy waste has become an inevitable choice, so it has important meaning to research a classroom intelligent lighting control system.Firstly the current widely used fluorescent tube in traditional and present vigorously promote LED fluorescent tube in our country is compared in this paper, the18W T8LED fluorescent lamp, which is energy saving, environmental protection,high efficiency and long life, is selected as the dimming control object in the intelligent lighting control system, and a dimming18W T8LED fluorescent lamp driving power is designed, the PT1407chip is used as the driver in the power driver in this paper. Secondly according to the characteristics of the classroom which is mainly used to have classes and self-study for students, a network classroom lighting intelligent control scheme is presented in this paper, namely through the light sensor collected light intensity information and pyroelectric infrared sensor collected acquisition personnel information transmit to the DSP microcontroller,according to the different work mode and subregional classroom control design,DSP microcontroller generate the corresponding PWM wave to the PWMD pin of the PT4107chip, thus changing the luminous intensity of the LED and realizing adaptive dimming purposes.Lastly DSP through CAN bus and PC exchange information, DSP can receive instructions which is PC monitoring system (VB program) send and also can feedback the collected indoor information to the PC, so that the staff can real-time understand indoor lighting conditions. PC is mainly responsible for completing the control, management and monitoring of the whole system. Then, completed the hardware design and software programming of the intelligent lighting control system in this paper.Experiments show that not only solved such "long lighting" and "no one lighting" waste of energy, also met the requirements for the lighting in the classroom in this paper, making indoor illumination can be maintained at a certain level, letting the students can have such a comfortable learning environment to protect eyesight, becoming a good energy saving effect design.