摘要
为了实现非接触式眼压计角膜自动对准功能,需要对多个电机进行协同控制,也就是对X,Y,Z三个轴向的电机进行控制。对传统的三轴移动系统都是一个控制器对应控制一个电机,控制电机运动时只有当一个轴的运动完成时才可以驱动另一个轴的电机运动,这种控制系统外围电路复杂繁琐,进行软件编程时增大对微处理器控制负担,自动对准效率低。提出一种多电机协同控制的新方案,该方案采用TMC429+TMC246的驱动组合,这个组合外围电路简单,可减轻微处理器负担,可以用一个控制器来完成多个电机的协同控制,减少了对准所用的时间,提高了自动对准速度,通过实验测试,搭建出来的系统控制精度均优于10μm,通电运行和待机状态下的振动不大于2μm,提高了对准精度。
In order to realize the automatic corneal alignment function of the non-contact tonometer,it is necessary to perform coordinated control on a plurality of motors,that is,to control the three axial motors of X,Y,and Z. For the traditional three-axis mobile system,one controller corresponds to one motor. When the motor is controlled to move,the motor movement of the other axis can be driven only when the movement of one axis is completed. The peripheral circuit of this control system is complicated and cumbersome. When programming,the control burden of the microprocessor is increased,and the automatic alignment efficiency is low. A new scheme of multi-motor coordinated control is proposed. The scheme adopts the driving combination of TMC429+TMC246,and the combined peripheral circuit is simple,which can reduce the micro processing. The burden can be achieved by using a controller to complete the coordinated control of multiple motors,reducing the time used for alignment and improving the automatic alignment speed. Through experimental testing,the system control accuracy is better than 10 μm,power running and the vibration in the standby state is not more than 2 μm,which improves the alignment accuracy.
作者
郑印
王劲松
许鹏飞
王睿智
ZHENG Yin;WANG Jin-song;XU Peng-fei;WANG Rui-zhi(School of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022)
出处
《长春理工大学学报（自然科学版）》
2020年第2期68-73,共6页
Journal of Changchun University of Science and Technology(Natural Science Edition)
基金
吉林省科技厅重点项目(20180201025GX)。
关键词
非接触式眼压计
三轴移动
跟踪
对准
Non-contact tonometer
three-axis movement
tracking
alignment
