Design and Implementation of Classroom Intelligent LED Lighting Control System

Abstract

The sub-regional multi mode lighting control system for classroom is designed to reduce the waste of energy. In the design, RS-485 communication network is used to establish all the area light. Using illumination sensor, vibration sensor and infrared sensor, the solution can automatically collect information of classroom illumination and working state, distribution of people and so on. So that the system can propose a program of switching lights by the chip for data analysis and comparison of data from the overall. Through a certain control algorithm, the control system can achieve good energy saving effect. Introduction With the development of economy and the progress of the society, energy demand is increasing and the supply of energy is relatively decreasing. what's more, the prominent energy's wasting makes our countries' energy situation quite grim. And the electric energy which is closely related to people's production and life is very inadequate, so how to improve the utilization rate of electric resource has become a problem which needs to be urgent for solving. In the search for the alternatives to improve energy efficiency and energy saving ways, we found that energy saving is consistent with the requirements of sustainable development. According to the statistics in 2010, the whole society of our country's total electricity consumption of about 24000 million kwh, lighting electricity for about 300 billion kwh, and the annual increase rate of 13% ~ 14%, Now the lighting power consumption is more than 500 billion kwh, additional lighting electricity 200 billion kwh. 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. Based on the above situation, this light control system is developed, which machine of STC89C54 is a major part, using integrated optical frequency converter TSL230 to carry out accurate illuminance detection and the environment of development is better than before. This system can satisfy the following functions, such as controlling the circuit of illumination, testing and processing daylight signal, testing and processing the signal of human body that illuminates the back track exists, etc. In order to satisfy these functions, the system adopted the homologous methods respectively, and to the gearing of the system, analyzing how to install，test and run the system. In the control method, joined the light intensity of upper and lower threshold ,which can avoid the mistake operation, was caused by the insufficiency of light intensity lights, system cannot recognize light enough because of the situation is provided by ambient light or by light. Adding the number of thresholds, it canovercome the promble because of the fragmentation of the distribution of the staff to open more light. In data measurement, the system can calculate the illuminance through the output frequency by the directe light freque...

<p>Effects of Light Intensity on Spatial Visualization Ability</p>

“…All of these areas fundamentally influence a person's visual strengths, especially spatial ability. LED lighting in particular offers color temperature flexibility and control over output, as well as a reduction in energy usage (Li, Lu, Wu, & Wang, 2015).…”