远程控制高时间分辨多通道脉冲发生器设计

Design of a Long-Distance Controlled High Time Resolution Multi-channel Pulse Generator

基于FPGA为四分幅相机研制了高时间分辨的多通道脉冲发生器;该系统具有4个独立的输出信号,配合高压快门电路实现对分幅相机4个通道曝光时间和延迟的控制;采用FPGA内部计数方法实现各个通道输出脉冲的宽度和延时的精确调节,同时采用光纤通信的方式实现远程控制,并利用高速高压输出驱动接口提高了系统的输出能力;研制的同步脉冲发生器最小时间分辨可达4ns、输出幅度可达7.5V、传输距离大于10km。

A high time resolution multi--channel pulse generator based on FPGA has been placed, which is designed for Four--Channel framing camera. The system which provides for four independent output channels Combined with a high voltage shutter circuit to regulate the exposure and delay time of the Four--Channel framing camera. It used the high--speed counter within the FPGA to realize precision regulation, fiber communication to realize long--distance control and high--speed high--voltage interface to improve the output drive capability. The minimum time scale of the system is 4 nanoseconds, the range of the output pulse is 7.5 voltages, and the transmission distance is longer than 10 kilometers.