为了保证螺旋CT的扫描定位精度、实现CT支架的旋转和扫描的同步,利用步进电机每转一个固定的角度就发出一个脉冲的原理,对该脉冲信号进行计数,以此来判断CT转过的角度。同时提出了多路传输的方案,解决了利用红外数据传输技术来传输脉冲信号的方向问题。实验结果表明,该方案很好地实现了集装箱螺旋CT的扫描同步。 In order to ensure the scanning positioning accuracy of spiral CT, to achieve the rotation of the CT scaffold and scanning synchronization, the use of a fixed angle per stepper motor sends a pulse on the principle of the pulse signal to count, in order to determine the CT turn Angle. At the same time proposed multi-channel transmission scheme to solve the use of infrared data transmission technology to transmit the direction of the pulse signal. Experimental results show that this scheme can realize the scanning synchronization of container spiral CT.