Research And Design Of Photoelectric Detector Based On Solar Tracking

In the solar application system, a solar-tracing device which is simple, inexpensive, but with high precision is being sought. The Solar tracking Photoelectric detector is discussed and designed in this paper. Then the performance of the tracing device is tested by computer measurement system.The tracing of the sun is studied and kinds of working states of the current domestic solar-tracking devices are comprehensively analyzed in the thesis, then a new solar-tracking detector is designed. Its structure is used silicon photovoltaic cells as a light-sensitive components to install in a specific framework which bottom has a plane mirror,when sun's rays vertically irradiate the plane mirror,every photovoltaic cell will generate nearly equal electrical current signal and tracking machine will be in the state of stillness;when the angle between sun's rays and the plane mirror isn't 90°, not all photovoltaic cell is in the same ambient lightillumination ,tracking machine will work untill then normal o f the plane mirror is dead against sun. As a result, a large range and high precision tracing are realized by the tracking detector.According to the analysis of kinds of functions possessed the sensor-tracing device, hardware and software design has finished. A simple tracing device is made to make some experiments with Solar tracking Photoelectric detector, the interpretation of which is that the tracing precision can achieve 0.5°and the tracing range is between 2°～178°both in elevation and azimuth. At last, the device is analysed which can work steadily according to different kinds of weather status, This two level sensor-tracing device is not only inexpensive, but also with simple structure, which can be used in concentrical photovoltaic solar energy generation, disk solar energy thermal-generation and tower solar energy thermal-generation.