摘要
人体呼气检测是一种便捷有效的临床诊断手段,通过检测人体呼出气体中CH_(4)浓度能够实现消化科、内分泌科等领域的疾病的无损检测。使用TDLAS技术进行人体呼气检测是一种精确、便捷的检测方法。针对TDLAS型CH_(4)气体检测系统,本文设计了基于FPGA的激光器温控系统。系统选用XC6SLX25为主控芯片,主控制器通过模数转换芯片AD7691实时获取激光器的温度,将实际温度与设定温度进行数字PID运算后,改变数模转换电路输出的电压控制TEC驱动芯片AND8835实现对激光器温度的控制。经过试验测试,该温控系统可以高效、精确、快速的对激光器进行温度控制,控温精度达到±0.01℃。
The human breath test is a convenient and effective clinical diagnosis method. By detecting the concentration of CH_(4)in the human exhaled air, non-destructive detection of diseases in gastroenterology, endocrinology and other fields can be realized. The use of TDLAS technology for human breath detection is an accurate, convenient detection method. Aiming at the TDLAS type CH_(4)gas detection system, this article designs a laser temperature control system based on FPGA. The system uses XC6 SLX25 as the main control chip. The main controller obtains the temperature of the laser in real time through the analog-to-digital conversion chip AD7691. After the actual temperature and the set temperature are subjected to digital PID calculation, the voltage output of the digital-to-analog conversion circuit is changed to control the TEC driver chip AND8835 realizes the control of laser temperature. After experimental tests, the temperature control system can efficiently, accurately and quickly control the temperature of the laser, with a temperature control accuracy of ±0.01 ℃.
作者
俞泳波
王彪
张瑞
程林祥
连厚泉
戴童欣
YU Yongbo;WANG Biao;ZHANG Rui;CHENG Linxiang;LIAN Houquan;DAI Tongxin(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China;University of Science and Technology of China,Hefei 230026,China)
出处
《激光杂志》
CAS
北大核心
2022年第1期8-11,共4页
Laser Journal
基金
国家重大科研仪器设备研制项目(No.61727822)
白求恩医学工程与仪器中心项目(No.BQEGCZX2021023)。
