百皮秒级三维选通成像时序控制系统  

Hundred ps level timing control system in 3D range-gated imaging

作　　者：杨金宝[1] 曹忆南[1] 范松涛[1] 周燕[1] 

机构地区：[1]中国科学院半导体研究所光电系统实验室,北京100083

出　　处：《红外与激光工程》2012年第7期1792-1797,共6页Infrared and Laser Engineering

基　　金：中国科学院国防创新基金(CXJJ-11-M24)

摘　　要：为克服传统选通成像控制系统功能简单、结构单一、时序控制精度不高的不足,提出了一种基于FPGA和延时线应用技术的百ps级三维选通成像控制系统,其中,FPGA控制精度为10 ns,延时线精度高达150 ps。为提高系统的可操作性,设计了上位机界面程序,可灵活改变系统各控制参数。通过微控制器的程序设计,完成USB上下位机的通信和系统各部件的控制,通过FPGA硬件语言描述产生ns级时序粗调信号,延时线产生百ps级精调信号。另外增加了像增强器MCP增益控制和脉冲激光器功率控制,并对控制信息进行实时显示。实验室测试和整机实验均表明系统设计正确,USB传输稳定,可有效产生时序触发信号,并完成MCP增益、激光器功率控制,可稳定工作于三维选通成像等技术领域。A 3D range-gated control system with precision of 150 ps based on FPGA and delay line was designed in order to overcome the disadvantage of simple control function, single structure and low control precision of traditional one. Precision of FPGA was 10 ns while that of delay line was as high as 150 ps. In addition, multiple function and high integration, stability and precision were its advantages. PC interface was programmed, and the control parameters could be changed flexibly. USB communication and control of every unit of the system were executed by micro-control unit （MCU）. Timing signals with ns precision were generated by FPGA and delay line with a precision of 150ps was also used. Many new functions were added, for example, MCP gain control of gated intensifier, pulse laser power control and LCD real-time display of control parameters. Tests in laboratory and system experiments both show that the design of 3D control system is correct. USB communicates properly, timing signals can be generated and the control of MCP gain and laser power works well. At last, it can work in 3D range-gated imaging stably.

关 键 词：百ps级 控制系统 三维成像 时序控制 

分 类 号：TN221[电子电信—物理电子学] TN41