There are mainly two ways to track the sun,photoelectricity track and sun angle track.After analyzing and compraring these two ways,we decide to adopt the mode to track the sun in which the photoelectricity track and sun angle track combinetogether. Be defferent with the popular mode that the two ways exchange mutuaily,in this mode,the two ways run simultaneously in one track action.The actual tracking angle is based on three factors,theoretic result,advance correctional quantity and adjustive quantity.This mode is able to improve the precisuin and reliability of system and reduce cost of fixing of device.Computer send pulse signal to the drivers of DC motor through digital singal output channel.Then system control mechanism,according to the intensity of sunlight,photoelectricity examination circuit generate digital signal ,and computer receives this signal through digital signal. Input channel,basing this signal,computer adjusts angle and direction of DC motor and mechanism.Finally,system realize automatic track to the sun.Therefore,the control syntem introduced in this paper has many advantages,such ad high precision and reliability,high practicability and so on. Mechanical device and the accuracy of the implementing agencies do not ask for much, is extremely practical.
Keywords: auto-solar track,computer controlled system,solar equipment,photoelectricity examination