中文摘要：

螺旋CT安检系统中平移运动和旋转运动的同步，以及旋转运动与探测数据采集的同步问题，是实现螺旋CT的关键问题之一，也是螺旋CT控制系统设计的难点之一。本文针对一种多线阵螺旋CT安检系统的设计要求，提出了一种实现平移和旋转运动同步，以及旋转运动与探测数据采集的同步控制方法。设计了一种工业计算机控制，磁栅位置检测，交流伺服电动机和滚筒电机分别驱动旋转轴和平移轴的同步运动控制系统。该控制方法能够有效地解决平移运动和旋转运动的同步，以及旋转运动与探测数据采集的同步问题，具有可行性和经济实用性。

英文摘要：

In security inspection system of spiral CT, the synchronization between removing and rotating, and the scan synchronization between rotating and sampling influence quality of image reconstruction, so it is difficulty and important that how to realize synchronized scan. According to the controlling demand of multi-slice Spiral CT, the method to realize synchronized scan is given. A synchronized control system is designed, in which we use a industrial PC as the control computer, use magnetic grids as position detectors, an use alternating current servo motor and roller motor as drivers respectively drive moving axis and rotating axis. This method can solve the problem of synchronized scan, and has a feasibility and value of use.