The Design Of Sun-track System Based On Embedded Technology

Solar power energy is a kind of clean,pollution-free useless energy.Its development prospects are bright.Using solar energy to generate electronic power has already been a meaningful topic which is concerned by people around the world.We have plentiful solar energy resource in our country.And according to the distribution of solar energy resource,the amount of the solar radiation in the western region is more than the other areas.So,making good use of the solar energy will promote the Western Development Project in the future.The applications of solar energy will benefit the environmental protection.Therefore,how to further promote the efficiency of solar photovoltaic devices has become an urgent issue at present from the perspective of commercial development as well as the view of technological applications.However, the solar energy has its own features,such as intermittent,uncertainly direction and uncertainly light intensity.So,it takes us some difficulties to receive the solar energy. Some fixed solar collection systems can't receive the light energy as much as possible. Their efficiency that the sun cells boards receive the sun light is comparatively low. Therefore,it is necessary to make the sun cell boards track the sun,when we use solar energy.In this thesis,a new type of Sun Tracking System based on ARM 32-bit microprocessor S3C44BOX is developed.This thesis consists of the following part:1.After studying and analyzing the current developing situation of the sun tracking technology,a new kind of sun tracking solution based on the embedded technology, which uses two controlling methods together,is developed.2.After comparing among the layouts,there is a layout chosen to be set up on the system,and it implements the tracking according to the test in lab.3.The Samsung S3C44BOX is chosen to be the MCU of the system.We expand a keyboard and an LCD connecting to the ARM board.So that we can setup the system and change the control mode,and it takes us a good man-machine interface.4.The calculation of the time of sunrise and sunset and the solar altitude and solar azimuth of any day of a year is implemented in the system by C language.This system use photoelectric sensor control method combining with sun-track control method to identify the position of the sun correctly.We write program by C language and download the program into the flash and run it on the board. 5.The board was connected to the motors which controls the solar cell board.It to make the solar cell board aim the sun and track the sun when it moves so that it can receive the solar energy as much as possible.The operation situation of the system shows us that the proposal system can work steadily and it can track the sun correctly.The instantaneity of the system is good as well.The machine that I design can not only be controlled simply,but it is also designed rationally and easy to control as well.The experimental results show that the proposal system can increase the efficiency that the solar energy turns to electronic power.