| Orbit motion photography is a special kind of shooting means in the film and television industry,it can provide continuous mobile shooting screen,which significantly enhances visual effects of some programs.The early orbit motion photography relied on manpower to push the rail car,and by cameraman sitting in the car for manual shooting,the disadvantage was the cameraman's handling requirements were high,and difficult to provide high stability precision shooting,especially for some programs which need to repeat shooting the screen,could not guarantee the consistency of multiple shots.In order to satisfy the special needs of orbital mobile photography,in recent years was born a orbit camera robot,which used a large number of automation technology to ensure high-quality shooting at the same time,could greatly reduce the control requirements of the cameraman.Aiming at the limitation of some existing applications of the equipment,this paper studied a kind of orbit camera robot system,which mainly consists of bionic tripod,control cabinet,rail car,telescopic column and tilt head.Operators could achieve high-quality performance of various applications of shooting by means of controlling the syschronous movement of rail car,telescopic column and pan-tilt through the bionic tripod.This paper mainly studied the designing method of control system of the orbit camera robot.The main work was described as follow:(1)Based on the analysis of applications requirements of orbit camera robot,the structure and operational principle of the system were given,and the internal structure of main components such as bionic tripod,control cabinet,rail car,telescopic column and pan-tilt were introduced.What's more,the working pattern and cooperative work pattern among components were described.(2)The designing method of the hardware of the orbit camera robot was given in this paper.In this system,the NJ301 motion controller was used as main control module.The signals transmission between the modules was realized by using the EtherCAT network,and the model of the hardware modules were selected according to the pratical requirements,and designed the special application circuit of video synchronization.(3)The designing method of the software of the control system based on Sysmac Studio was analyzed in detail.The overall architecture of the software and the cooperative work pattern were given.The designing method of ST and the ladder diagram of modules such as synchronous motion control,preset function,trajectory design,coordinate calculation were introduced emphatically.(4)The designing method of touch screen based on NB_Design was described.The overall architecture of the human-computer interaction interface and the switching mode between interfaces were given in this paper,and the designing method of interfaces and the transmission mode of signals between interface and control system were analyzed.(5)The debugging procedure of the orbit camera robot was introduced.And the improved method of the control system was given aimed at the problem in the debugging procedure.Finally,this article has carried on the summary,and put forward some improvements in the late. |
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