The research of automatic horizontal adjustment of stereoscopic video shooting cradle head

With the worldwide popular of the stereoscopic film "Avatar", stereoscopic video has become the focus of the industry, and also greatly promoted the development of stereoscopic video shooting technology. On the market nowadays, the stereoscopic video shooting cradle head gets horizontal mostly through the manual setting of the independent knobs and the legs of the tripod by observing the change of the spirit level. If the tripod is not stable enough, the camera´s position and angle will change. The paper is about the automatic adjustment of the stereoscopic video shooting cradle head. The tri-axis accelerometer installed on the shooting cradle head works as the collection module of position and attitude data. The collected signal will be transmitted through the A/D conversion module to 51 series single chip microcomputer (SCM) for real-time processing. The difference value of the current angle and horizontal angle will be inputted to PID, and then produce an adjustable of duty cycle, thus we can modify the horizontality of the cradle head. By compensating and correcting the deviation angle to achieve the automatic adjustment of the cradle head´s horizontal, basically satisfy the requirements of stability, accurate, fast to control system.