Research On Key Technology Of Sunlight Transmitted Into Room System

Recently, the photovoltaic technology is mature unceasingly, it brings the more capacious future for the solar illumination application. As the social economy developing, transmitting sunlight into room for illumination also gets more and more attention increasingly, which makes illumination more scientific, more convenience, and more saving energy source. The fremdness have had some foundation on the technology, but their equipments are expensive and low efficiency. The price is the bottlenck for the market extending. Therefore , it's significant to empolder the sunlight transmitted into room system that is independent property right and adapt to the situation of our country.This thesis surveys the current technology of transmitting sunlight into room system . It introduces the research on the technology in USA,Europe and Japan particularly, and analyses the internal technical level at present, and develop a sunlight transmitted into room system.The system realize the function that transmitting sunlight into room for illumination; at the same time, develop a accessional setting, the automatical tracking system, which can improve the sunlight using efficiency, and level off the sunlight. The controlling system turns as the rotational orientation of the sun, looking for the position which is the maximal value of the sunlight, when it finds the position, control the system to turn to the sun's orientation.The sunlight transmitted into room system consists of focus setting,heat filtering setting, sunlight transmitting setting, light scattering setting and driving electromotor. Fresnel lens is used as the focus setting, the driving electromotor control the lens running; choosing heat insulation glass as the heat filtering setting; the palstic optical fiber transmits the focusing sunlight; the scatteing galss reverts the sunlight. The focused light is transmitted into room, through the coupling optical fiber after filtered by the heat insulation glass,then the sunlight is scattered to nature light at the other end of the optical fiber. accordingly,the function that transmitting sunlight for indoor illumination is realized. The main body of the automatical tracking system is the photoelectricity signal collecting cell.The cell is located at the top of the yuntai. It can tracking the strongest sunlight accurately. And the SPCE061A singlechip deals with the data momently, then exports the signal to control the electromotor of yuntai and Fresnel lens to turn to the sun's orientation, improving the sunlight using efficiency.