基于XC6SLX16的TDLAS气体检测激光驱动系统

TDLAS gas detection laser drive system based on XC6SLX16

TDLAS技术作为一种快速、准确、高精度的气体检测手段,可用于多种极端环境中的气体测量以及人体呼气检测等领域。本文设计了一种基于XC6SLX16的TDLAS气体检测激光驱动系统,采用FPGA芯片XC6SLX16为主控,在FPGA内部利用直接数字合成的方式产生激光器所需要的驱动信号。并研制了输出范围数控可调的压控恒流源电路,可以通过FPGA设置不同档位的电流输出,使得驱动系统可以满足不同激光器的需求。同时,系统使用USB的方式进行通信,通过上位机配置系统工作时的各项参数,提高了系统的易用性和灵活性。

As a fast, accurate and high-precision gas detection method, TDLAS technology can be used for gas measurement in a variety of extreme environments and human breath detection. In this paper, a TDLAS gas detection laser driving system based on XC6 SLX16 is designed. The FPGA chip XC6 SLX16 is used as the main control, and the driving signal required by the laser is generated by direct digital synthesis in the FPGA. And developed a voltage-controlled constant current source circuit with digitally adjustable output range, which can set the current output of different gears through FPGA, so that the drive system can meet the needs of different lasers. At the same time, the system uses USB to communicate, and configures various parameters of the system through the host computer, which improves the usability and flexibility of the system.