光学精密工程2026，Vol.34Issue(15)：2302-2316,15.DOI:10.37188/OPE.20263415.2302
基于辐射本底扣除和对数放大的TDLAS燃烧温度快速反演
Rapid inversion of combustion temperature based on background radiation subtraction and logarithmic amplification in TDLAS
摘要
Abstract
To address the limitation that traditional TDLAS systems fail to meet the millisecond-scale transient combustion measurement requirements of engines because of processing delays introduced by complex spectral line fitting and numerical inversion algorithms,a rapid hardware-based spectral process-ing system using logarithmic amplification is proposed and developed.The study covers the overall system architecture,the design of an automatic background radiation subtraction circuit,the logarithmic amplifica-tion circuit,algorithmic correction methods,and the real-time data processing framework.In the analog front end,a proprietary background radiation subtraction circuit and a logarithmic ratio amplifier based on the LOG114 chip are employed to directly output a voltage signal proportional to absorbance.In the digital section,a field-programmable gate array(FPGA)is used for high-speed data acquisition and absorbance integration accumulation,followed by temperature inversion calculations implemented on a microcon-troller.Experimental results show that,at a scanning frequency of 100 kHz,stable background radiation subtraction is achieved,and a single temperature calculation requires approximately 2.5 ms.The system is therefore capable of rapidly measuring high-temperature flow fields at millisecond intervals and is expect-ed to capture transient combustion variations in engines.关键词
TDLAS/燃烧场/高频响/对数比放大/背景辐射扣除/快速测量Key words
TDLAS/combustion field/high frequency response/logarithmic ratio amplification/back-ground radiation subtraction/quick measurement分类
数理科学引用本文复制引用
李玉涵,胡佳屹,姚路,许振宇,黄安,阚瑞峰..基于辐射本底扣除和对数放大的TDLAS燃烧温度快速反演[J].光学精密工程,2026,34(15):2302-2316,15.基金项目
国家重点研发计划资助项目(No.2023YFF0716400) （No.2023YFF0716400）
安徽省科技创新攻坚计划资助项目(No.202523j08050005) （No.202523j08050005）
