摘  要：为实现X-Y二维工作平台的精确定位,以容栅传感器作为位置检测环节，实时的将工作台的运动状态反馈给单片机，单片机根据设定程序对两个方向的步进电机进行闭环控制。通过将容栅传感器输出的串行信号转换成并行信号的方法，方便地实现了单片机对容栅传感器输出信号的处理。试验证明，这种控制方法能实现工作平台的精确定位，具有较高的实用价值。
关键词：步进电机；单片机；容栅传感器；闭环控制

Abstract: In order to realize the accurate point control of the X-Y motion platform,using the capacitive sensor as the position detection segment.The capacitive sensor feeds the platform’s situation back to the single chip timely so that two direction motors can be closed-loop controled by the single chips through the setted program.The single chip can process the serial signal outputing from capacitive sensor easly through method of transforming serial signal to parallel Signal.This controlling method was proved to be highly worthy to realize the accurate point control of the platform by experiment.
Key Words: Step motor;Single chip;Capative sensor;Close-loop control