基于FPGA的DP-LIBS延时发生器设计与评测  

Design and Evaluation of DP-LIBS Delay Generator Based on FPGA

作　　者：吴天宇 周勇 胥成金 何康 WU Tianyu;ZHOU Yong;XU Chengjin;HE Kang(North China University of Technology,Beijing 100144,China)

机构地区：[1]北方工业大学,北京100144

出　　处：《工业技术创新》2023年第1期67-74,共8页Industrial Technology Innovation

摘　　要：双脉冲激光诱导击穿光谱(DP-LIBS)技术是物质分析领域中的一种新兴分析技术,两束激光间的延时需要达到纳秒级精度方可满足技术应用需求。以标准的DP-LIBS激光器击打节奏为起点开展研究,确定最小延时。基于现场可编程门阵列(FPGA)开展系统整体设计:在Verilog-HDL语言环境下构建FPGA仿真程序架构;以EP4CE10E22C8N作为主芯片开展硬件设计,绘制PCB图,得到焊接电路板;基于C#的Winform框架进行上位机控制软件开发,通过矩阵按键的标签名称进行数字排序,以实现波形显示及输出。经评测,系统能够准确接收上位机指令产生相应的脉冲波形输出,脉冲间隔最小可低至10ns,软硬件协同处理效率高,满足DPLIBS实际应用需求。Dual pulse laser induced breakdown spectroscopy(DP-LIBS) is a new analytical technology in the field of material analysis, in which the delay between two lasers needs to reach nanosecond precision to meet the technological application requirements. The study was started from the standard striking rhythm of DP-LIBS laser, and the minimum delay was determined. Based on the field programmable gate array(FPGA), the overall design of the system was carried out: the architecture of FPGA simulation program was built in the Verilog-HDL language environment;the hardware design was carried out with EP4CE10E22C8N as the main chip, and the PCB diagram was drawn to obtain the welded circuit board;based on Winform framework of C#, the upper computer control software was developed, and the numbers were sorted by the label names of matrix keys to realize the waveform display and output.The evaluation shows that the system can accurately receive the instructions from the upper computer to generate the corresponding pulse waveform output, and the minimum pulse interval can be as low as 10ns. The software and hardware co-processing efficiency is high, which meets the practical application requirements of DP-LIBS.

关 键 词：DP-LIBS 光谱分析 FPGA 延时发生器 VERILOG-HDL 纳秒级精度 

分 类 号：TN782[电子电信—电路与系统]