摘要
为了开发小型化的实用激光甲烷检测系统,设计了基于STM32单片机和FPGA的系统方案。FPGA实现系统中正交矢量锁相放大器和激光器调制驱动信号的产生。STM32负责半导体激光器温度控制,气体体积分数计算,通信接口等功能。设计的激光甲烷检测系统对4种标准甲烷气体进行了实际测试,在10%量程范围内示值误差不超过±0.2%。此方案可以作为激光气体检测系统的通用平台,实现对其他气体的测量。
The system scheme based on STM32 and FPGA is designed in order to develop the miniaturization practical laser methane detecting system.The generation of the orthogonal vector lock-in amplifier and laser modulation driving signal is implemented on the FPGA chip.STM32 is responsible for the temperature control of semiconductor lasers,calculation of gas volume fraction,communication interface and other functions.Four standard methane samples are tested by the designed laser methane detecting system,indicating error is less than ±0.2% at the full scale of 10%.This scheme can be used as a common platform for the laser gas detecting system to realize measurement of other gases.
出处
《传感器与微系统》
CSCD
北大核心
2012年第10期116-118,共3页
Transducer and Microsystem Technologies
基金
国家"863"计划资助项目(2009AA03Z442)
