光学精密工程2025，Vol.33Issue(12)：1853-1863,11.DOI:10.37188/OPE.20253312.1853
基于STM32的腔衰荡光谱CO2传感器及其在种子呼吸过程的应用
STM32-based cavity ring-down spectroscopy CO2 Sensor and its application in seed respiration
摘要
Abstract
The analysis of the seed respiration process is of critical importance for accurately assessing seed viability.Therefore,the development of a rapid,stable,and highly sensitive seed respiration detec-tion device is essential.In this study,a CO2 gas sensor was designed and constructed based on an STM32 microcontroller and Cavity Ring-Down Spectroscopy(CRDS)technology,and it was subsequently ap-plied to seed respiration detection.The sensor employed an STM32-based control and data acquisition scheme,comprising a threshold detection and shut-off module formed by a high-speed comparator and RS flip-flop,a high-speed analog signal acquisition module,an STM32 master control unit,and an upper computer data processing system.The threshold detection module achieved a cutoff delay of 0.45 μs,while the maximum sampling rate of the analog signal acquisition module reached 31.25 MHz.Experimen-tal verification confirmed that the sensor can detect CO2 concentrations as low as 1.5 ppm,demonstrating good sensitivity.The sensor successfully captured the respiration process of rice seeds,producing a curve of CO2 concentration changes over time for 10 g of rice seeds.Within 2.5 hours,the CO2 concentration in-creased by approximately 730 ppm.This study highlights the potential and application value of CRDS technology in seed respiration detection.关键词
腔衰荡光谱技术/STM32/二氧化碳/种子呼吸Key words
cavity ring-down spectroscopy/STM32/carbon dioxide/seed respiratio分类
数理科学引用本文复制引用
李浩凯,翟保杰,王孟圆,周月婷,郭古青,邱选兵,李传亮..基于STM32的腔衰荡光谱CO2传感器及其在种子呼吸过程的应用[J].光学精密工程,2025,33(12):1853-1863,11.基金项目
国家自然科学基金(No.62475182,No.52076145,No.12304403) （No.62475182,No.52076145,No.12304403）
山西省科技创新人才团队专项资助(No.202304051001034) （No.202304051001034）
山西省重点研发计划(No.202402150301012,No.202402130501005,No.202302150101006) （No.202402150301012,No.202402130501005,No.202302150101006）
中央引导地方科技发展资金项目(No.YDZJSX2025C026) （No.YDZJSX2025C026）
量子光学与量子光学器件国家重点实验室计划支持项目(No.KF202305,No.KF202308) （No.KF202305,No.KF202308）
山西省高等学校科技创新计划项目(No.2024L227) （No.2024L227）
山西省研究生教育教学改革课题(No.2024JG161) （No.2024JG161）
