A new synchronization control circuit based on FPGA for the laser range-gated imaging system  

作　　者：何钐 李丽 周燕 

机构地区：[1]School of Electronic Information Engineering,Beijing University of Aeronautics and Astronatuics [2]Optoelectronic System Laboratory,Institute of Semiconductors,Chinese Academy of Sciences

出　　处：《Optoelectronics Letters》2009年第4期248-250,共3页光电子快报（英文版）

基　　金：supported by the National "863 Project" of China (No.2007AA11Z238);the Post Doctoral Foundation of China (No.20080441271)

摘　　要：Synchronization control is a kernel technique of the laser range-gated(LRG) imaging system which controls the synchronization of the pulsed laser and the ICCD camera directly.It can achieve range gating effectively and improve the resolution of image precisely.Conventional control circuits which are composed of discrete components have a poor performance of anti-interference,and the transmitting signal has a bad delay which affects the conventional circuit's precision and stabilization seriously.To solve these problems,a range-gated synchronization control circuit is designed.This circuit,which takes the advantages of FPGA's high compact and flexibility,uses the phase-locking-loop(PLL) to multiply the global clock frequency.This design improves the precision and stabilization greatly,makes the precision up to a nanosecond level and provides a real-time selection of the values of pulse width and delays.Experiments results indicate that this circuit has a high precise and stable range-gated pulse.Synchronization control is a kernel technique of the laser range-gated （LRG） imaging system which controls the synchronization of the pulsed laser and the ICCD camera directly. It can achieve range gating effectively and improve the resolution of image precisely. Conventional control circuits which are composed of discrete components have a poor performance of anti-interference, and the transmitting signal has a-bad delay which affects the conventional circuit＇s precision and stabilization seriously. To solve these problems, a range-gated synchronization control circuit is designed. This circuit, which takes the advantages of FPGA＇s high compact and flexibility, uses the phase-locking-loop （PLL） to multiply the global clock frequency. This design improves the precision and stabilization greatly, makes the precision up to a nanosecond level and provides a real-time selection of the values of pulse width and delays. Experiments results indicate that this circuit has a high precise and stable range-gated pulse.

关 键 词：控制电路设计 同步控制 距离选通 成像系统 FPGA 激光测距 ICCD相机 脉冲激光 

分 类 号：TP274.5[自动化与计算机技术—检测技术与自动化装置]