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5 results on '"Jia, Liangquan"'

1. CO2 concentration detection system for seed respiration

Author

HU wen-jun, QI heng-nian, Jia Liangquan, Kan rui-feng, and Zhao Guangwu

Subjects
Chromatography, Chemistry, Co2 concentration, Respiration, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Abstract

针对传统种子呼吸CO2浓度检测方法中检测精度低的问题，为了满足测量需要，提出一种采用可调谐二极管激光器吸收光谱技术的种子呼吸测量系统方案。该系统是由多次反射池结构的种子呼吸容器、分布反馈式激光器及其控制电路、光电转换及放大电路、数据采集电路、上位机软件等构成，设计种子呼吸容器其空间体积为1.5 L，激光器光源采用2 004 nm波段，多次反射池光程为16 m。然后，基于朗伯比尔定律，通过波长调制吸收光谱技术，利用二次谐波实时反演出种子呼吸过程中产生CO2气体的浓度。测试结果显示：种子呼吸CO2浓度测量的稳定重复性为0.033%，CO2浓度的线性拟合度为0.999 38，CO2浓度检测极限为1.7 ppm。通过实验对糯玉米种子进行检测，获得20 g玉米种子呼吸的变化曲线，其12 h内变化量为2 750.5 ppm，呼吸速率为229.2 ppm/h，实验结果表明该系统能解决种子呼吸CO2浓度无法连续性测量、浓度检测精度低等问题。

Published
2019

2. Open-path Detection Of Atmospheric CH4 And N2O Based On Quantum Cascade Laser

Author

Huihui Xia, Ruifeng Kan, Jianguo Liu, Sun Liqin, Song Yuan, Wei Wang, Li Mingxing, Min Wei, and Jia Liangquan

Subjects
Detection limit, Materials science, Tunable diode laser absorption spectroscopy, Absorption spectroscopy, business.industry, Open path, law.invention, Light intensity, law, Optoelectronics, Modulation spectroscopy, business, Quantum cascade laser, Laser beams
Abstract

A quantum cascade laser (QCL) emitting around 1274cm-1 based open-path sensor is developed for the simultaneous detection of CH4 and N2O. The sensor achieves a detection limit of 4ppbv for CH4 and 2ppbv for N2O.

Published
2014

4. Study on Detection of Greenhouse Gases Based on Quantum Cascade Laser

Author

袁松 Yuan Song, 姚路 Yao Lu, 许振宇 Xu Zhenyu, 贾良权 Jia Liangquan, 王薇 Wang Wei, 戴云海 Dai Yunhai, 魏敏 Wei Min, 刘建国 Liu Jianguo, and 阚瑞峰 Kan Ruifeng

Subjects
Materials science, business.industry, law, Greenhouse gas, Optoelectronics, business, Quantum cascade laser, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention
Published
2014

5. Effects of Temperature and Pressure Changes on the Second Harmonic Inversion Results

Author

张光乐 Zhang Guangle, 袁松 Yuan Song, 刘建国 Liu Jianguo, 姚路 Yao Lu, 刘文清 Liu Wenqing, 阚瑞峰 Kan Ruifeng, 戴云海 Dai Yunhai, 魏敏 Wei Min, 贾良权 Jia Liangquan, and 许振宇 Xu Zhenyu

Subjects
Materials science, Temperature and pressure, Inversion (meteorology), Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Computational physics
Published
2014

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